#18058 Fix the Java generator to generate valid @RequestMappings where the produce field takes list of string parameters instead of a single comma-separated string (#18092)

* #18058 Fix AbstractJavaCodegen.getAccepts() so it returns a String array instead of a comma-separated string, and fixed api.mustache so the @RequestMapping annotation generated produces for x-accepts as a parameter list instead of a (single) string.

* #18058 Updated test case to accept a string array instead of a comma-separated list.

* #18058 Reverted changes on imported compared to the main branch.

* #18058 getAccepts() is now hybrid, and can return both a single String or a String[].

* #18058 Rolled back the hybrid getAccepts(), so it only returns a String array.

* #18058 Updated mustache files to cope with vendorExtensions.x-accepts being a string array instead of a comma-separated string.

* #18058 Generated new sample files with by running `./bin/generate-samples.sh ./bin/configs/*.yaml`

* #18058 Optimization of getAccepts()

* #18058 Regenerated scripts that got broken after resolving conflicts on GitHub

* #18058 Fixed introduced issue with api.mustache causing a redundant accept with @HttpExchange with the PetApi.java, StoreApi.java, and UserApi.java.

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractJavaCodegen.java

@@ -1784,7 +1784,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
                         String contentType = consumes.isEmpty() ? defaultContentType : consumes.get(0);
                         operation.addExtension("x-content-type", contentType);
                     }
-                    String accepts = getAccepts(openAPI, operation);
+                    String[] accepts = getAccepts(openAPI, operation);
                     operation.addExtension("x-accepts", accepts);
                 }
             }
@@ -1835,19 +1835,12 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
         }
     }
 
-    private static String getAccepts(OpenAPI openAPIArg, Operation operation) {
+    private static String[] getAccepts(OpenAPI openAPIArg, Operation operation) {
         final Set<String> producesInfo = getProducesInfo(openAPIArg, operation);
         if (producesInfo != null && !producesInfo.isEmpty()) {
-            StringBuilder sb = new StringBuilder();
-            for (String produce : producesInfo) {
-                if (sb.length() > 0) {
-                    sb.append(",");
-                }
-                sb.append(produce);
-            }
-            return sb.toString();
+            return producesInfo.toArray(new String[] {});
         }
-        return "application/json"; // default media type
+        return new String[] { "application/json" }; // default media type
     }
 
     @Override

modules/openapi-generator/src/main/resources/Java/libraries/feign/api.mustache

@@ -43,7 +43,7 @@ public interface {{classname}} extends ApiClient.Api {
   @RequestLine("{{httpMethod}} {{{path}}}{{#hasQueryParams}}?{{/hasQueryParams}}{{#queryParams}}{{baseName}}={{=<% %>=}}{<%paramName%>}<%={{ }}=%>{{^-last}}&{{/-last}}{{/queryParams}}")
   @Headers({
 {{#vendorExtensions.x-content-type}}    "Content-Type: {{vendorExtensions.x-content-type}}",
-{{/vendorExtensions.x-content-type}}    "Accept: {{vendorExtensions.x-accepts}}",{{#headerParams}}
+{{/vendorExtensions.x-content-type}}    "Accept: {{#vendorExtensions.x-accepts}}{{.}}{{^-last}},{{/-last}}{{/vendorExtensions.x-accepts}}",{{#headerParams}}
     "{{baseName}}: {{=<% %>=}}{<%paramName%>}<%={{ }}=%>"{{^-last}},
     {{/-last}}{{/headerParams}}
   })
@@ -73,7 +73,7 @@ public interface {{classname}} extends ApiClient.Api {
   @RequestLine("{{httpMethod}} {{{path}}}{{#hasQueryParams}}?{{/hasQueryParams}}{{#queryParams}}{{baseName}}={{=<% %>=}}{<%paramName%>}<%={{ }}=%>{{^-last}}&{{/-last}}{{/queryParams}}")
   @Headers({
 {{#vendorExtensions.x-content-type}}    "Content-Type: {{vendorExtensions.x-content-type}}",
-{{/vendorExtensions.x-content-type}}    "Accept: {{vendorExtensions.x-accepts}}",{{#headerParams}}
+{{/vendorExtensions.x-content-type}}    "Accept: {{#vendorExtensions.x-accepts}}{{.}}{{^-last}},{{/-last}}{{/vendorExtensions.x-accepts}}",{{#headerParams}}
     "{{baseName}}: {{=<% %>=}}{<%paramName%>}<%={{ }}=%>"{{^-last}},
     {{/-last}}{{/headerParams}}
   })
@@ -118,7 +118,7 @@ public interface {{classname}} extends ApiClient.Api {
   @RequestLine("{{httpMethod}} {{{path}}}?{{#queryParams}}{{baseName}}={{=<% %>=}}{<%paramName%>}<%={{ }}=%>{{^-last}}&{{/-last}}{{/queryParams}}")
   @Headers({
 {{#vendorExtensions.x-content-type}}  "Content-Type: {{vendorExtensions.x-content-type}}",
-{{/vendorExtensions.x-content-type}}  "Accept: {{vendorExtensions.x-accepts}}",{{#headerParams}}
+{{/vendorExtensions.x-content-type}}  "Accept: {{#vendorExtensions.x-accepts}}{{.}}{{^-last}},{{/-last}}{{/vendorExtensions.x-accepts}}",{{#headerParams}}
       "{{baseName}}: {{=<% %>=}}{<%paramName%>}<%={{ }}=%>"{{^-last}},
       {{/-last}}{{/headerParams}}
   })
@@ -158,7 +158,7 @@ public interface {{classname}} extends ApiClient.Api {
       @RequestLine("{{httpMethod}} {{{path}}}?{{#queryParams}}{{baseName}}={{=<% %>=}}{<%paramName%>}<%={{ }}=%>{{^-last}}&{{/-last}}{{/queryParams}}")
       @Headers({
   {{#vendorExtensions.x-content-type}}  "Content-Type: {{vendorExtensions.x-content-type}}",
-  {{/vendorExtensions.x-content-type}}  "Accept: {{vendorExtensions.x-accepts}}",{{#headerParams}}
+  {{/vendorExtensions.x-content-type}}  "Accept: {{#vendorExtensions.x-accepts}}{{.}}{{^-last}},{{/-last}}{{/vendorExtensions.x-accepts}}",{{#headerParams}}
           "{{baseName}}: {{=<% %>=}}{<%paramName%>}<%={{ }}=%>"{{^-last}},
       {{/-last}}{{/headerParams}}
       })

modules/openapi-generator/src/main/resources/Java/libraries/rest-assured/api.mustache

@@ -157,9 +157,7 @@ public class {{classname}} {
             {{#x-content-type}}
             reqSpec.setContentType("{{x-content-type}}");
             {{/x-content-type}}
-            {{#x-accepts}}
-            reqSpec.setAccept("{{x-accepts}}");
-            {{/x-accepts}}
+            reqSpec.setAccept("{{#x-accepts}}{{.}}{{^-last}},{{/-last}}{{/x-accepts}}");
             {{/vendorExtensions}}
             this.respSpec = new ResponseSpecBuilder();
         }

modules/openapi-generator/src/main/resources/JavaSpring/api.mustache

@@ -233,7 +233,7 @@ public interface {{classname}} {
     @RequestMapping(
         method = RequestMethod.{{httpMethod}},
         value = "{{{path}}}"{{#singleContentTypes}}{{#hasProduces}},
-        produces = "{{{vendorExtensions.x-accepts}}}"{{/hasProduces}}{{#hasConsumes}},
+        produces = { {{#vendorExtensions.x-accepts}}"{{.}}"{{^-last}}, {{/-last}}{{/vendorExtensions.x-accepts}} }{{/hasProduces}}{{#hasConsumes}},
         consumes = "{{{vendorExtensions.x-content-type}}}"{{/hasConsumes}}{{/singleContentTypes}}{{^singleContentTypes}}{{#hasProduces}},
         produces = { {{#produces}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/produces}} }{{/hasProduces}}{{#hasConsumes}},
         consumes = { {{#consumes}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/consumes}} }{{/hasConsumes}}{{/singleContentTypes}}{{#hasVersionHeaders}},

modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-http-interface/api.mustache

@@ -53,8 +53,8 @@ public interface {{classname}} {
     {{/isDeprecated}}
     @HttpExchange(
         method = "{{{httpMethod}}}",
-        value = "{{{path}}}"{{#vendorExtensions.x-accepts}},
-        accept = "{{{vendorExtensions.x-accepts}}}"{{/vendorExtensions.x-accepts}}{{#vendorExtensions.x-content-type}},
+        value = "{{{path}}}",
+        accept = { {{#vendorExtensions.x-accepts}}"{{.}}"{{^-last}}, {{/-last}}{{/vendorExtensions.x-accepts}} }{{#vendorExtensions.x-content-type}},
         contentType = "{{{vendorExtensions.x-content-type}}}"{{/vendorExtensions.x-content-type}}
     )
     {{>responseType}} {{operationId}}(

modules/openapi-generator/src/main/resources/java-pkmst/api.mustache

@@ -58,7 +58,7 @@ public interface {{classname}} {
     @RequestMapping(
         method = RequestMethod.{{httpMethod}},
         value = "{{{path}}}"{{#singleContentTypes}},
-        produces = "{{{vendorExtensions.x-accepts}}}",
+        produces = { {{#vendorExtensions.x-accepts}}"{{.}}"{{^-last}}, {{/-last}}{{/vendorExtensions.x-accepts}} },
         consumes = "{{{vendorExtensions.x-content-type}}}"{{/singleContentTypes}}{{^singleContentTypes}}{{#hasProduces}},
         produces = { {{#produces}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/produces}} }{{/hasProduces}}{{#hasConsumes}},
         consumes = { {{#consumes}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/consumes}} }{{/hasConsumes}}{{/singleContentTypes}}

modules/openapi-generator/src/main/resources/kotlin-spring/api.mustache

@@ -85,7 +85,7 @@ class {{classname}}Controller({{#serviceInterface}}@Autowired(required = true) v
     @RequestMapping(
         method = [RequestMethod.{{httpMethod}}],
         value = ["{{#lambdaEscapeInNormalString}}{{path}}{{/lambdaEscapeInNormalString}}"]{{#singleContentTypes}}{{#hasProduces}},
-        produces = "{{{vendorExtensions.x-accepts}}}"{{/hasProduces}}{{#hasConsumes}},
+        produces = [{{#vendorExtensions.x-accepts}}"{{.}}"{{^-last}}, {{/-last}}{{/vendorExtensions.x-accepts}}]{{/hasProduces}}{{#hasConsumes}},
         consumes = "{{{vendorExtensions.x-content-type}}}"{{/hasConsumes}}{{/singleContentTypes}}{{^singleContentTypes}}{{#hasProduces}},
         produces = [{{#produces}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/produces}}]{{/hasProduces}}{{#hasConsumes}},
         consumes = [{{#consumes}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/consumes}}]{{/hasConsumes}}{{/singleContentTypes}}

modules/openapi-generator/src/main/resources/kotlin-spring/apiInterface.mustache

@@ -97,7 +97,7 @@ interface {{classname}} {
     @RequestMapping(
             method = [RequestMethod.{{httpMethod}}],
             value = ["{{#lambdaEscapeInNormalString}}{{path}}{{/lambdaEscapeInNormalString}}"]{{#singleContentTypes}}{{#hasProduces}},
-            produces = "{{{vendorExtensions.x-accepts}}}"{{/hasProduces}}{{#hasConsumes}},
+            produces = [{{#vendorExtensions.x-accepts}}"{{.}}"{{^-last}}, {{/-last}}{{/vendorExtensions.x-accepts}}]{{/hasProduces}}{{#hasConsumes}},
             consumes = "{{{vendorExtensions.x-content-type}}}"{{/hasConsumes}}{{/singleContentTypes}}{{^singleContentTypes}}{{#hasProduces}},
             produces = [{{#produces}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/produces}}]{{/hasProduces}}{{#hasConsumes}},
             consumes = [{{#consumes}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/consumes}}]{{/hasConsumes}}{{/singleContentTypes}}

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/AbstractJavaCodegenTest.java

@@ -83,7 +83,10 @@ public class AbstractJavaCodegenTest {
         codegen.preprocessOpenAPI(openAPI);
 
         Assert.assertEquals(codegen.getArtifactVersion(), openAPI.getInfo().getVersion());
-        Assert.assertEquals(openAPI.getPaths().get("/pet").getPost().getExtensions().get("x-accepts"), "application/json,application/xml");
+
+        Object xAccepts = openAPI.getPaths().get("/pet").getPost().getExtensions().get("x-accepts");
+        Assert.assertTrue(xAccepts instanceof String[]);
+        Assert.assertTrue(List.of((String[]) xAccepts).containsAll(List.of("application/json", "application/xml")));
     }
 
     @Test

samples/client/echo_api/java/apache-httpclient/api/openapi.yaml

@@ -58,7 +58,8 @@ paths:
       summary: Test path parameter(s)
       tags:
       - path
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/integer/boolean/string:
     post:
       description: Test form parameter(s)
@@ -79,7 +80,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/oneof:
     post:
       description: Test form parameter(s) for oneOf schema
@@ -100,7 +102,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /header/integer/boolean/string/enums:
     get:
       description: Test header parameter(s)
@@ -155,7 +158,8 @@ paths:
       summary: Test header parameter(s)
       tags:
       - header
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/enum_ref_string:
     get:
       description: Test query parameter(s)
@@ -189,7 +193,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/datetime/date/string:
     get:
       description: Test query parameter(s)
@@ -228,7 +233,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/integer/boolean/string:
     get:
       description: Test query parameter(s)
@@ -265,7 +271,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/array_string:
     get:
       description: Test query parameter(s)
@@ -288,7 +295,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_integer:
     get:
       description: Test query parameter(s)
@@ -313,7 +321,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_string:
     get:
       description: Test query parameter(s)
@@ -338,7 +347,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -361,7 +371,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -384,7 +395,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -407,7 +419,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -430,7 +443,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
@@ -452,7 +466,8 @@ paths:
       tags:
       - body
       x-content-type: application/octet-stream
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Pet:
     post:
       description: Test body parameter(s)
@@ -470,7 +485,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/allOf/Pet:
     post:
       description: Test body parameter(s)
@@ -488,7 +504,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/Pet/response_string:
     post:
       description: Test empty response body
@@ -506,7 +523,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Tag/response_string:
     post:
       description: Test empty json (request body)
@@ -524,7 +542,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/FreeFormObject/response_string:
     post:
       description: Test free form object
@@ -546,7 +565,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/string_enum:
     post:
       description: Test string enum response body
@@ -568,7 +588,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
@@ -584,7 +605,8 @@ paths:
       summary: Test binary (gif) response body
       tags:
       - body
-      x-accepts: image/gif
+      x-accepts:
+      - image/gif
   /body/application/octetstream/single_binary:
     post:
       description: Test single binary in multipart mime
@@ -605,7 +627,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/array_of_binary:
     post:
       description: Test array of binary in multipart mime
@@ -626,7 +649,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/basic:
     post:
       description: To test HTTP basic authentication
@@ -643,7 +667,8 @@ paths:
       summary: To test HTTP basic authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/bearer:
     post:
       description: To test HTTP bearer authentication
@@ -660,7 +685,8 @@ paths:
       summary: To test HTTP bearer authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
 components:
   requestBodies:
     Pet:

samples/client/echo_api/java/feign-gson/api/openapi.yaml

@@ -58,7 +58,8 @@ paths:
       summary: Test path parameter(s)
       tags:
       - path
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/integer/boolean/string:
     post:
       description: Test form parameter(s)
@@ -79,7 +80,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/oneof:
     post:
       description: Test form parameter(s) for oneOf schema
@@ -100,7 +102,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /header/integer/boolean/string/enums:
     get:
       description: Test header parameter(s)
@@ -155,7 +158,8 @@ paths:
       summary: Test header parameter(s)
       tags:
       - header
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/enum_ref_string:
     get:
       description: Test query parameter(s)
@@ -189,7 +193,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/datetime/date/string:
     get:
       description: Test query parameter(s)
@@ -228,7 +233,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/integer/boolean/string:
     get:
       description: Test query parameter(s)
@@ -265,7 +271,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/array_string:
     get:
       description: Test query parameter(s)
@@ -288,7 +295,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_integer:
     get:
       description: Test query parameter(s)
@@ -313,7 +321,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_string:
     get:
       description: Test query parameter(s)
@@ -338,7 +347,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -361,7 +371,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -384,7 +395,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -407,7 +419,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -430,7 +443,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
@@ -452,7 +466,8 @@ paths:
       tags:
       - body
       x-content-type: application/octet-stream
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Pet:
     post:
       description: Test body parameter(s)
@@ -470,7 +485,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/allOf/Pet:
     post:
       description: Test body parameter(s)
@@ -488,7 +504,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/Pet/response_string:
     post:
       description: Test empty response body
@@ -506,7 +523,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Tag/response_string:
     post:
       description: Test empty json (request body)
@@ -524,7 +542,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/FreeFormObject/response_string:
     post:
       description: Test free form object
@@ -546,7 +565,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/string_enum:
     post:
       description: Test string enum response body
@@ -568,7 +588,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
@@ -584,7 +605,8 @@ paths:
       summary: Test binary (gif) response body
       tags:
       - body
-      x-accepts: image/gif
+      x-accepts:
+      - image/gif
   /body/application/octetstream/single_binary:
     post:
       description: Test single binary in multipart mime
@@ -605,7 +627,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/array_of_binary:
     post:
       description: Test array of binary in multipart mime
@@ -626,7 +649,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/basic:
     post:
       description: To test HTTP basic authentication
@@ -643,7 +667,8 @@ paths:
       summary: To test HTTP basic authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/bearer:
     post:
       description: To test HTTP bearer authentication
@@ -660,7 +685,8 @@ paths:
       summary: To test HTTP bearer authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
 components:
   requestBodies:
     Pet:

samples/client/echo_api/java/native/api/openapi.yaml

@@ -58,7 +58,8 @@ paths:
       summary: Test path parameter(s)
       tags:
       - path
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/integer/boolean/string:
     post:
       description: Test form parameter(s)
@@ -79,7 +80,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/oneof:
     post:
       description: Test form parameter(s) for oneOf schema
@@ -100,7 +102,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /header/integer/boolean/string/enums:
     get:
       description: Test header parameter(s)
@@ -155,7 +158,8 @@ paths:
       summary: Test header parameter(s)
       tags:
       - header
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/enum_ref_string:
     get:
       description: Test query parameter(s)
@@ -189,7 +193,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/datetime/date/string:
     get:
       description: Test query parameter(s)
@@ -228,7 +233,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/integer/boolean/string:
     get:
       description: Test query parameter(s)
@@ -265,7 +271,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/array_string:
     get:
       description: Test query parameter(s)
@@ -288,7 +295,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_integer:
     get:
       description: Test query parameter(s)
@@ -313,7 +321,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_string:
     get:
       description: Test query parameter(s)
@@ -338,7 +347,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -361,7 +371,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -384,7 +395,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -407,7 +419,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -430,7 +443,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
@@ -452,7 +466,8 @@ paths:
       tags:
       - body
       x-content-type: application/octet-stream
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Pet:
     post:
       description: Test body parameter(s)
@@ -470,7 +485,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/allOf/Pet:
     post:
       description: Test body parameter(s)
@@ -488,7 +504,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/Pet/response_string:
     post:
       description: Test empty response body
@@ -506,7 +523,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Tag/response_string:
     post:
       description: Test empty json (request body)
@@ -524,7 +542,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/FreeFormObject/response_string:
     post:
       description: Test free form object
@@ -546,7 +565,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/string_enum:
     post:
       description: Test string enum response body
@@ -568,7 +588,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
@@ -584,7 +605,8 @@ paths:
       summary: Test binary (gif) response body
       tags:
       - body
-      x-accepts: image/gif
+      x-accepts:
+      - image/gif
   /body/application/octetstream/single_binary:
     post:
       description: Test single binary in multipart mime
@@ -605,7 +627,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/array_of_binary:
     post:
       description: Test array of binary in multipart mime
@@ -626,7 +649,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/basic:
     post:
       description: To test HTTP basic authentication
@@ -643,7 +667,8 @@ paths:
       summary: To test HTTP basic authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/bearer:
     post:
       description: To test HTTP bearer authentication
@@ -660,7 +685,8 @@ paths:
       summary: To test HTTP bearer authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
 components:
   requestBodies:
     Pet:

samples/client/echo_api/java/okhttp-gson/api/openapi.yaml

@@ -58,7 +58,8 @@ paths:
       summary: Test path parameter(s)
       tags:
       - path
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/integer/boolean/string:
     post:
       description: Test form parameter(s)
@@ -79,7 +80,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/oneof:
     post:
       description: Test form parameter(s) for oneOf schema
@@ -100,7 +102,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /header/integer/boolean/string/enums:
     get:
       description: Test header parameter(s)
@@ -155,7 +158,8 @@ paths:
       summary: Test header parameter(s)
       tags:
       - header
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/enum_ref_string:
     get:
       description: Test query parameter(s)
@@ -189,7 +193,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/datetime/date/string:
     get:
       description: Test query parameter(s)
@@ -228,7 +233,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/integer/boolean/string:
     get:
       description: Test query parameter(s)
@@ -265,7 +271,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/array_string:
     get:
       description: Test query parameter(s)
@@ -288,7 +295,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_integer:
     get:
       description: Test query parameter(s)
@@ -313,7 +321,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_string:
     get:
       description: Test query parameter(s)
@@ -338,7 +347,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -361,7 +371,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -384,7 +395,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -407,7 +419,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -430,7 +443,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
@@ -452,7 +466,8 @@ paths:
       tags:
       - body
       x-content-type: application/octet-stream
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Pet:
     post:
       description: Test body parameter(s)
@@ -470,7 +485,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/allOf/Pet:
     post:
       description: Test body parameter(s)
@@ -488,7 +504,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/Pet/response_string:
     post:
       description: Test empty response body
@@ -506,7 +523,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Tag/response_string:
     post:
       description: Test empty json (request body)
@@ -524,7 +542,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/FreeFormObject/response_string:
     post:
       description: Test free form object
@@ -546,7 +565,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/string_enum:
     post:
       description: Test string enum response body
@@ -568,7 +588,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
@@ -584,7 +605,8 @@ paths:
       summary: Test binary (gif) response body
       tags:
       - body
-      x-accepts: image/gif
+      x-accepts:
+      - image/gif
   /body/application/octetstream/single_binary:
     post:
       description: Test single binary in multipart mime
@@ -605,7 +627,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/array_of_binary:
     post:
       description: Test array of binary in multipart mime
@@ -626,7 +649,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/basic:
     post:
       description: To test HTTP basic authentication
@@ -643,7 +667,8 @@ paths:
       summary: To test HTTP basic authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/bearer:
     post:
       description: To test HTTP bearer authentication
@@ -660,7 +685,8 @@ paths:
       summary: To test HTTP bearer authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
 components:
   requestBodies:
     Pet:

samples/client/echo_api/java/resteasy/api/openapi.yaml

@@ -58,7 +58,8 @@ paths:
       summary: Test path parameter(s)
       tags:
       - path
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/integer/boolean/string:
     post:
       description: Test form parameter(s)
@@ -79,7 +80,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/oneof:
     post:
       description: Test form parameter(s) for oneOf schema
@@ -100,7 +102,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /header/integer/boolean/string/enums:
     get:
       description: Test header parameter(s)
@@ -155,7 +158,8 @@ paths:
       summary: Test header parameter(s)
       tags:
       - header
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/enum_ref_string:
     get:
       description: Test query parameter(s)
@@ -189,7 +193,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/datetime/date/string:
     get:
       description: Test query parameter(s)
@@ -228,7 +233,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/integer/boolean/string:
     get:
       description: Test query parameter(s)
@@ -265,7 +271,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/array_string:
     get:
       description: Test query parameter(s)
@@ -288,7 +295,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_integer:
     get:
       description: Test query parameter(s)
@@ -313,7 +321,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_string:
     get:
       description: Test query parameter(s)
@@ -338,7 +347,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -361,7 +371,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -384,7 +395,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -407,7 +419,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -430,7 +443,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
@@ -452,7 +466,8 @@ paths:
       tags:
       - body
       x-content-type: application/octet-stream
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Pet:
     post:
       description: Test body parameter(s)
@@ -470,7 +485,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/allOf/Pet:
     post:
       description: Test body parameter(s)
@@ -488,7 +504,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/Pet/response_string:
     post:
       description: Test empty response body
@@ -506,7 +523,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Tag/response_string:
     post:
       description: Test empty json (request body)
@@ -524,7 +542,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/FreeFormObject/response_string:
     post:
       description: Test free form object
@@ -546,7 +565,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/string_enum:
     post:
       description: Test string enum response body
@@ -568,7 +588,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
@@ -584,7 +605,8 @@ paths:
       summary: Test binary (gif) response body
       tags:
       - body
-      x-accepts: image/gif
+      x-accepts:
+      - image/gif
   /body/application/octetstream/single_binary:
     post:
       description: Test single binary in multipart mime
@@ -605,7 +627,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/array_of_binary:
     post:
       description: Test array of binary in multipart mime
@@ -626,7 +649,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/basic:
     post:
       description: To test HTTP basic authentication
@@ -643,7 +667,8 @@ paths:
       summary: To test HTTP basic authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/bearer:
     post:
       description: To test HTTP bearer authentication
@@ -660,7 +685,8 @@ paths:
       summary: To test HTTP bearer authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
 components:
   requestBodies:
     Pet:

samples/client/echo_api/java/resttemplate/api/openapi.yaml

@@ -58,7 +58,8 @@ paths:
       summary: Test path parameter(s)
       tags:
       - path
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/integer/boolean/string:
     post:
       description: Test form parameter(s)
@@ -79,7 +80,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /form/oneof:
     post:
       description: Test form parameter(s) for oneOf schema
@@ -100,7 +102,8 @@ paths:
       tags:
       - form
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /header/integer/boolean/string/enums:
     get:
       description: Test header parameter(s)
@@ -155,7 +158,8 @@ paths:
       summary: Test header parameter(s)
       tags:
       - header
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/enum_ref_string:
     get:
       description: Test query parameter(s)
@@ -189,7 +193,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/datetime/date/string:
     get:
       description: Test query parameter(s)
@@ -228,7 +233,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/integer/boolean/string:
     get:
       description: Test query parameter(s)
@@ -265,7 +271,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/array_string:
     get:
       description: Test query parameter(s)
@@ -288,7 +295,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_integer:
     get:
       description: Test query parameter(s)
@@ -313,7 +321,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_false/array_string:
     get:
       description: Test query parameter(s)
@@ -338,7 +347,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -361,7 +371,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_form/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -384,7 +395,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -407,7 +419,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /query/style_deepObject/explode_true/object/allOf:
     get:
       description: Test query parameter(s)
@@ -430,7 +443,8 @@ paths:
       summary: Test query parameter(s)
       tags:
       - query
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)
@@ -452,7 +466,8 @@ paths:
       tags:
       - body
       x-content-type: application/octet-stream
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Pet:
     post:
       description: Test body parameter(s)
@@ -470,7 +485,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/allOf/Pet:
     post:
       description: Test body parameter(s)
@@ -488,7 +504,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /echo/body/Pet/response_string:
     post:
       description: Test empty response body
@@ -506,7 +523,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/Tag/response_string:
     post:
       description: Test empty json (request body)
@@ -524,7 +542,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/FreeFormObject/response_string:
     post:
       description: Test free form object
@@ -546,7 +565,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /echo/body/string_enum:
     post:
       description: Test string enum response body
@@ -568,7 +588,8 @@ paths:
       tags:
       - body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /binary/gif:
     post:
       description: Test binary (gif) response body
@@ -584,7 +605,8 @@ paths:
       summary: Test binary (gif) response body
       tags:
       - body
-      x-accepts: image/gif
+      x-accepts:
+      - image/gif
   /body/application/octetstream/single_binary:
     post:
       description: Test single binary in multipart mime
@@ -605,7 +627,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /body/application/octetstream/array_of_binary:
     post:
       description: Test array of binary in multipart mime
@@ -626,7 +649,8 @@ paths:
       tags:
       - body
       x-content-type: multipart/form-data
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/basic:
     post:
       description: To test HTTP basic authentication
@@ -643,7 +667,8 @@ paths:
       summary: To test HTTP basic authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /auth/http/bearer:
     post:
       description: To test HTTP bearer authentication
@@ -660,7 +685,8 @@ paths:
       summary: To test HTTP bearer authentication
       tags:
       - auth
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
 components:
   requestBodies:
     Pet:

samples/client/others/java/okhttp-gson-oneOf/api/openapi.yaml

@@ -17,7 +17,8 @@ paths:
         "200":
           description: OK
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     _myExample_post_request:

samples/client/others/java/okhttp-gson-streaming/api/openapi.yaml

@@ -35,7 +35,8 @@ paths:
       x-streaming: true
       x-group-parameters: true
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       operationId: postPing
       requestBody:
@@ -54,7 +55,8 @@ paths:
       - ping
       x-streaming: true
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     SomeObj:

samples/client/others/java/resttemplate-useAbstractionForFiles/api/openapi.yaml

@@ -19,7 +19,8 @@ paths:
           description: Successful operation
       tags:
       - resource
-      x-accepts: application/octet-stream
+      x-accepts:
+      - application/octet-stream
 components:
   schemas: {}
 

samples/client/others/java/webclient-useAbstractionForFiles/api/openapi.yaml

@@ -19,7 +19,8 @@ paths:
           description: Successful operation
       tags:
       - resource
-      x-accepts: application/octet-stream
+      x-accepts:
+      - application/octet-stream
 components:
   schemas: {}
 

samples/client/petstore/java/apache-httpclient/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -70,7 +71,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -94,7 +96,8 @@ paths:
       - pet
       x-webclient-blocking: true
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -158,7 +161,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -203,7 +208,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -237,7 +244,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -271,7 +279,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -303,7 +313,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -338,7 +349,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -359,7 +371,8 @@ paths:
       tags:
       - store
       x-webclient-blocking: false
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -387,7 +400,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -410,7 +425,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -444,7 +460,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -463,7 +481,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -477,7 +496,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -491,7 +511,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -543,7 +564,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -554,7 +577,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -576,7 +600,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -606,7 +631,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -635,7 +662,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -655,7 +683,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -720,7 +749,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -826,7 +856,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -843,7 +874,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -871,7 +903,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -892,7 +925,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/property/enum-int:
     post:
       description: Test serialization of enum (int) properties with examples
@@ -914,7 +948,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -935,7 +970,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -956,7 +992,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -977,7 +1014,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -992,7 +1030,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -1009,7 +1048,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -1028,7 +1068,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -1047,7 +1088,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1068,7 +1110,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1087,7 +1130,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/nullable:
     post:
       description: ""
@@ -1106,7 +1150,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1130,7 +1175,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1148,7 +1194,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request must reference a schema\
@@ -1166,7 +1213,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-binary:
     put:
       description: "For this test, the body has to be a binary file."
@@ -1186,7 +1234,8 @@ paths:
       tags:
       - fake
       x-content-type: image/png
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1260,7 +1309,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1295,7 +1345,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1308,7 +1359,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/http-signature-test:
     get:
       operationId: fake-http-signature-test
@@ -1340,7 +1392,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/feign-no-nullable/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/feign/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -70,7 +71,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -94,7 +96,8 @@ paths:
       - pet
       x-webclient-blocking: true
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -158,7 +161,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -203,7 +208,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -237,7 +244,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -271,7 +279,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -303,7 +313,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -338,7 +349,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -359,7 +371,8 @@ paths:
       tags:
       - store
       x-webclient-blocking: false
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -387,7 +400,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -410,7 +425,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -444,7 +460,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -463,7 +481,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -477,7 +496,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -491,7 +511,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -543,7 +564,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -554,7 +577,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -576,7 +600,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -606,7 +631,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -635,7 +662,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -655,7 +683,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -720,7 +749,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -826,7 +856,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -843,7 +874,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -871,7 +903,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -892,7 +925,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/property/enum-int:
     post:
       description: Test serialization of enum (int) properties with examples
@@ -914,7 +948,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -935,7 +970,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -956,7 +992,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -977,7 +1014,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -992,7 +1030,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -1009,7 +1048,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -1028,7 +1068,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -1047,7 +1088,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1068,7 +1110,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1087,7 +1130,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/nullable:
     post:
       description: ""
@@ -1106,7 +1150,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1130,7 +1175,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1148,7 +1194,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request must reference a schema\
@@ -1166,7 +1213,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-binary:
     put:
       description: "For this test, the body has to be a binary file."
@@ -1186,7 +1234,8 @@ paths:
       tags:
       - fake
       x-content-type: image/png
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1260,7 +1309,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1295,7 +1345,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1308,7 +1359,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/http-signature-test:
     get:
       operationId: fake-http-signature-test
@@ -1340,7 +1392,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/google-api-client/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/jersey2-java8-localdatetime/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/jersey2-java8/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/jersey3/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -69,7 +70,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -91,7 +93,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -140,7 +143,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -182,7 +187,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -214,7 +221,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -247,7 +255,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -277,7 +287,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -312,7 +323,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -332,7 +344,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -360,7 +373,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -383,7 +398,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -417,7 +433,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -436,7 +454,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -450,7 +469,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -464,7 +484,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -516,7 +537,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -527,7 +550,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +573,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +604,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -608,7 +635,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +656,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -693,7 +722,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -790,7 +820,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -807,7 +838,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -835,7 +867,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -856,7 +889,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -877,7 +911,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -898,7 +933,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -919,7 +955,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -936,7 +973,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -955,7 +993,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -974,7 +1013,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -995,7 +1035,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1014,7 +1055,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1038,7 +1080,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1056,7 +1099,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1074,7 +1118,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1130,7 +1175,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1165,7 +1211,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1178,7 +1225,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/array-of-enums:
     get:
       operationId: getArrayOfEnums
@@ -1192,7 +1240,8 @@ paths:
       summary: Array of Enums
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/request-array-string:
     post:
       operationId: postArrayOfString
@@ -1211,7 +1260,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/native-async/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -69,7 +70,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -91,7 +93,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -140,7 +143,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -182,7 +187,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -214,7 +221,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -247,7 +255,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -277,7 +287,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -312,7 +323,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -332,7 +344,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -360,7 +373,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -383,7 +398,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -417,7 +433,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -436,7 +454,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -450,7 +469,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -464,7 +484,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -516,7 +537,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -527,7 +550,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +573,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +604,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -608,7 +635,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +656,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -693,7 +722,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -790,7 +820,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -807,7 +838,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -835,7 +867,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -856,7 +889,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -877,7 +911,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -898,7 +933,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -919,7 +955,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -934,7 +971,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -951,7 +989,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -970,7 +1009,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -989,7 +1029,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1010,7 +1051,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1029,7 +1071,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1053,7 +1096,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1071,7 +1115,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1089,7 +1134,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1145,7 +1191,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1180,7 +1227,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1193,7 +1241,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/array-of-enums:
     get:
       operationId: getArrayOfEnums
@@ -1207,7 +1256,8 @@ paths:
       summary: Array of Enums
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/application_json_utf8:
     get:
       operationId: get_application_json_utf8
@@ -1221,7 +1271,8 @@ paths:
       summary: application/json UTF8
       tags:
       - fake
-      x-accepts: application/json;charset=utf-8
+      x-accepts:
+      - application/json;charset=utf-8
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/native-jakarta/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       externalDocs:
@@ -79,7 +81,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -123,7 +127,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -163,7 +169,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -195,7 +203,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -228,7 +237,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -258,7 +269,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -293,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -313,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -341,7 +355,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -364,7 +380,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -398,7 +415,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -419,7 +438,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -435,7 +455,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -451,7 +472,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -512,7 +534,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -525,7 +549,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +574,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +605,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -610,7 +638,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/native/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -69,7 +70,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -91,7 +93,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -140,7 +143,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -182,7 +187,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -214,7 +221,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -247,7 +255,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -277,7 +287,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -312,7 +323,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -332,7 +344,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -360,7 +373,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -383,7 +398,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -417,7 +433,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -436,7 +454,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -450,7 +469,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -464,7 +484,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -516,7 +537,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -527,7 +550,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +573,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +604,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -608,7 +635,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +656,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -693,7 +722,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -790,7 +820,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -807,7 +838,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -835,7 +867,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -856,7 +889,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -877,7 +911,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -898,7 +933,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -919,7 +955,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -934,7 +971,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -951,7 +989,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -970,7 +1009,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -989,7 +1029,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1010,7 +1051,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1029,7 +1071,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1053,7 +1096,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1071,7 +1115,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1089,7 +1134,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1145,7 +1191,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1180,7 +1227,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1193,7 +1241,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/array-of-enums:
     get:
       operationId: getArrayOfEnums
@@ -1207,7 +1256,8 @@ paths:
       summary: Array of Enums
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/application_json_utf8:
     get:
       operationId: get_application_json_utf8
@@ -1221,7 +1271,8 @@ paths:
       summary: application/json UTF8
       tags:
       - fake
-      x-accepts: application/json;charset=utf-8
+      x-accepts:
+      - application/json;charset=utf-8
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/okhttp-gson-3.1/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       externalDocs:
@@ -79,7 +81,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -123,7 +127,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -163,7 +169,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -195,7 +203,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -228,7 +237,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -258,7 +269,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -293,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -312,7 +325,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -340,7 +354,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -363,7 +379,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -397,7 +414,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -418,7 +437,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -434,7 +454,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -450,7 +471,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -511,7 +533,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -524,7 +548,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -548,7 +573,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -578,7 +604,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -609,7 +637,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /no_ref:
     get:
       operationId: response_no_ref
@@ -622,7 +651,8 @@ paths:
           description: required to pass validation
       tags:
       - fake
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /ref/no_ref:
     get:
       operationId: response_ref_to_no_ref
@@ -631,7 +661,8 @@ paths:
           $ref: '#/components/responses/no_ref'
       tags:
       - fake
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /ref/ref:
     get:
       operationId: response_ref_to_ref
@@ -640,7 +671,8 @@ paths:
           $ref: '#/components/responses/ref'
       tags:
       - fake
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
   /ref/ref_to_parameter:
     get:
       operationId: ref_to_ref_parameter
@@ -651,7 +683,8 @@ paths:
           $ref: '#/components/responses/ref'
       tags:
       - fake
-      x-accepts: text/plain
+      x-accepts:
+      - text/plain
     parameters:
     - $ref: '#/components/parameters/ref_to_uuid'
   /fake/api/changeowner:
@@ -673,7 +706,8 @@ paths:
       summary: op1
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/api/changename:
     post:
       operationId: op2
@@ -693,7 +727,8 @@ paths:
       summary: op2
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   parameters:
     ref_to_uuid:

samples/client/petstore/java/okhttp-gson-awsv4signature/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       externalDocs:
@@ -79,7 +81,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -123,7 +127,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -163,7 +169,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -195,7 +203,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -228,7 +237,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -258,7 +269,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -293,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -313,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -341,7 +355,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -364,7 +380,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -398,7 +415,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -419,7 +438,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -435,7 +455,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -451,7 +472,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -512,7 +534,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -525,7 +549,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +574,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +605,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -610,7 +638,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/okhttp-gson-dynamicOperations/src/main/resources/openapi/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/okhttp-gson-group-parameter/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       operationId: updatePet
@@ -76,7 +78,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -120,7 +124,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -160,7 +166,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -192,7 +200,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -225,7 +234,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -256,7 +267,8 @@ paths:
       - pet
       x-group-parameters: false
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -291,7 +303,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/okhttp-gson-nullable-required/api/openapi.yaml

@@ -37,7 +37,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -58,7 +59,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -101,7 +103,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -141,7 +145,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -173,7 +179,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -206,7 +213,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -236,7 +245,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -271,7 +281,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -291,7 +302,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -319,7 +331,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -342,7 +356,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -376,7 +391,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -397,7 +414,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -413,7 +431,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -429,7 +448,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -490,7 +510,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -503,7 +525,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -527,7 +550,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -557,7 +581,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -588,7 +614,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/okhttp-gson-parcelableModel/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/okhttp-gson-swagger1/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       externalDocs:
@@ -79,7 +81,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -123,7 +127,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -163,7 +169,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -195,7 +203,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -228,7 +237,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -258,7 +269,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -293,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -313,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -341,7 +355,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -364,7 +380,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -398,7 +415,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -419,7 +438,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -435,7 +455,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -451,7 +472,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -512,7 +534,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -525,7 +549,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +574,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +605,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -610,7 +638,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/okhttp-gson-swagger2/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       externalDocs:
@@ -79,7 +81,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -123,7 +127,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -163,7 +169,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -195,7 +203,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -228,7 +237,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -258,7 +269,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -293,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -313,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -341,7 +355,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -364,7 +380,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -398,7 +415,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -419,7 +438,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -435,7 +455,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -451,7 +472,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -512,7 +534,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -525,7 +549,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +574,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +605,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -610,7 +638,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/okhttp-gson/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -68,7 +69,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -89,7 +91,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -137,7 +140,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -178,7 +183,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -210,7 +217,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -244,7 +252,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -274,7 +284,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -309,7 +320,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -329,7 +341,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -357,7 +370,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -380,7 +395,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -414,7 +430,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -433,7 +451,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -447,7 +466,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -461,7 +481,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -513,7 +534,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -524,7 +547,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -546,7 +570,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -576,7 +601,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -605,7 +632,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -625,7 +653,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -690,7 +719,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -787,7 +817,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -804,7 +835,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -832,7 +864,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -853,7 +886,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -874,7 +908,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -895,7 +930,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -916,7 +952,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -933,7 +970,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -952,7 +990,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -971,7 +1010,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -992,7 +1032,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1011,7 +1052,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1035,7 +1077,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1053,7 +1096,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1071,7 +1115,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1127,7 +1172,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1162,7 +1208,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1175,7 +1222,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/array-of-enums:
     get:
       operationId: getArrayOfEnums
@@ -1189,7 +1237,8 @@ paths:
       summary: Array of Enums
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/parameter-name-mapping:
     get:
       operationId: getParameterNameMapping
@@ -1225,7 +1274,8 @@ paths:
       summary: parameter name mapping test
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/parameter-string-number:
     get:
       operationId: getParameterStringNumber
@@ -1245,7 +1295,8 @@ paths:
       summary: parameter string number
       tags:
       - another_fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/parameter-array-number:
     get:
       operationId: getParameterArrayNumber
@@ -1268,7 +1319,8 @@ paths:
       summary: parameter array number default value
       tags:
       - another_fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/null-request-body:
     get:
       operationId: null-request-body
@@ -1318,7 +1370,8 @@ paths:
       summary: null request body
       tags:
       - another_fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /values:
     get:
       description: ""
@@ -1335,7 +1388,8 @@ paths:
       summary: Get some primitive variable values
       tags:
       - values
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /internal/only:
     get:
       description: ""
@@ -1352,7 +1406,8 @@ paths:
       tags:
       - values
       x-internal: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/rest-assured-jackson/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/rest-assured/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/resteasy/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -70,7 +71,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -94,7 +96,8 @@ paths:
       - pet
       x-webclient-blocking: true
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -158,7 +161,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -203,7 +208,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -237,7 +244,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -271,7 +279,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -303,7 +313,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -338,7 +349,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -359,7 +371,8 @@ paths:
       tags:
       - store
       x-webclient-blocking: false
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -387,7 +400,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -410,7 +425,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -444,7 +460,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -463,7 +481,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -477,7 +496,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -491,7 +511,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -543,7 +564,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -554,7 +577,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -576,7 +600,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -606,7 +631,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -635,7 +662,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -655,7 +683,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -720,7 +749,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -826,7 +856,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -843,7 +874,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -871,7 +903,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -892,7 +925,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/property/enum-int:
     post:
       description: Test serialization of enum (int) properties with examples
@@ -914,7 +948,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -935,7 +970,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -956,7 +992,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -977,7 +1014,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -992,7 +1030,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -1009,7 +1048,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -1028,7 +1068,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -1047,7 +1088,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1068,7 +1110,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1087,7 +1130,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/nullable:
     post:
       description: ""
@@ -1106,7 +1150,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1130,7 +1175,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1148,7 +1194,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request must reference a schema\
@@ -1166,7 +1213,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-binary:
     put:
       description: "For this test, the body has to be a binary file."
@@ -1186,7 +1234,8 @@ paths:
       tags:
       - fake
       x-content-type: image/png
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1260,7 +1309,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1295,7 +1345,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1308,7 +1359,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/http-signature-test:
     get:
       operationId: fake-http-signature-test
@@ -1340,7 +1392,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/resttemplate-jakarta/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       externalDocs:
@@ -79,7 +81,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -123,7 +127,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -163,7 +169,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -195,7 +203,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -228,7 +237,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -258,7 +269,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -293,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -313,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -341,7 +355,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -364,7 +380,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -398,7 +415,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -419,7 +438,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -435,7 +455,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -451,7 +472,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -512,7 +534,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -525,7 +549,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +574,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +605,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -610,7 +638,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/resttemplate-swagger1/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       externalDocs:
@@ -79,7 +81,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -123,7 +127,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -163,7 +169,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -195,7 +203,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -228,7 +237,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -258,7 +269,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -293,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -313,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -341,7 +355,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -364,7 +380,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -398,7 +415,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -419,7 +438,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -435,7 +455,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -451,7 +472,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -512,7 +534,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -525,7 +549,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +574,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +605,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -610,7 +638,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/resttemplate-swagger2/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       externalDocs:
@@ -79,7 +81,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -123,7 +127,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -163,7 +169,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -195,7 +203,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -228,7 +237,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -258,7 +269,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -293,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -313,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -341,7 +355,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -364,7 +380,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -398,7 +415,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -419,7 +438,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -435,7 +455,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -451,7 +472,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -512,7 +534,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -525,7 +549,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +574,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +605,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -610,7 +638,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/resttemplate-withXml/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -70,7 +71,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -94,7 +96,8 @@ paths:
       - pet
       x-webclient-blocking: true
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -158,7 +161,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -203,7 +208,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -237,7 +244,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -271,7 +279,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -303,7 +313,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -338,7 +349,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -359,7 +371,8 @@ paths:
       tags:
       - store
       x-webclient-blocking: false
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -387,7 +400,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -410,7 +425,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -444,7 +460,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -463,7 +481,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -477,7 +496,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -491,7 +511,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -543,7 +564,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -554,7 +577,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -576,7 +600,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -606,7 +631,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -635,7 +662,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -655,7 +683,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -720,7 +749,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -826,7 +856,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -843,7 +874,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -871,7 +903,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -892,7 +925,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/property/enum-int:
     post:
       description: Test serialization of enum (int) properties with examples
@@ -914,7 +948,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -935,7 +970,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -956,7 +992,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -977,7 +1014,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -992,7 +1030,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -1009,7 +1048,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -1028,7 +1068,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -1047,7 +1088,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1068,7 +1110,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1087,7 +1130,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/nullable:
     post:
       description: ""
@@ -1106,7 +1150,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1130,7 +1175,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1148,7 +1194,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request must reference a schema\
@@ -1166,7 +1213,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-binary:
     put:
       description: "For this test, the body has to be a binary file."
@@ -1186,7 +1234,8 @@ paths:
       tags:
       - fake
       x-content-type: image/png
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1260,7 +1309,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1295,7 +1345,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1308,7 +1359,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/http-signature-test:
     get:
       operationId: fake-http-signature-test
@@ -1340,7 +1392,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/resttemplate/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -70,7 +71,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -94,7 +96,8 @@ paths:
       - pet
       x-webclient-blocking: true
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -158,7 +161,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -203,7 +208,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -237,7 +244,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -271,7 +279,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -303,7 +313,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -338,7 +349,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -359,7 +371,8 @@ paths:
       tags:
       - store
       x-webclient-blocking: false
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -387,7 +400,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -410,7 +425,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -444,7 +460,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -463,7 +481,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -477,7 +496,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -491,7 +511,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -543,7 +564,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -554,7 +577,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -576,7 +600,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -606,7 +631,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -635,7 +662,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -655,7 +683,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -720,7 +749,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -826,7 +856,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -843,7 +874,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -871,7 +903,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -892,7 +925,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/property/enum-int:
     post:
       description: Test serialization of enum (int) properties with examples
@@ -914,7 +948,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -935,7 +970,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -956,7 +992,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -977,7 +1014,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -992,7 +1030,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -1009,7 +1048,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -1028,7 +1068,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -1047,7 +1088,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1068,7 +1110,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1087,7 +1130,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/nullable:
     post:
       description: ""
@@ -1106,7 +1150,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1130,7 +1175,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1148,7 +1194,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request must reference a schema\
@@ -1166,7 +1213,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-binary:
     put:
       description: "For this test, the body has to be a binary file."
@@ -1186,7 +1234,8 @@ paths:
       tags:
       - fake
       x-content-type: image/png
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1260,7 +1309,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1295,7 +1345,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1308,7 +1359,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/http-signature-test:
     get:
       operationId: fake-http-signature-test
@@ -1340,7 +1392,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/retrofit2-play26/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/retrofit2/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/retrofit2rx2/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/retrofit2rx3/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/vertx-no-nullable/api/openapi.yaml

@@ -47,7 +47,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       operationId: updatePet
       requestBody:
@@ -82,7 +83,8 @@ paths:
       - pet
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -127,7 +129,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -172,7 +176,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       operationId: deletePet
@@ -202,7 +208,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -235,7 +242,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       operationId: updatePetWithForm
       parameters:
@@ -263,7 +272,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       operationId: uploadFile
@@ -295,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -315,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       operationId: placeOrder
@@ -344,7 +356,9 @@ paths:
       - store
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -367,7 +381,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -401,7 +416,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -422,7 +439,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       operationId: createUsersWithArrayInput
@@ -444,7 +462,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       operationId: createUsersWithListInput
@@ -466,7 +485,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       operationId: loginUser
@@ -510,7 +530,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       operationId: logoutUser
@@ -521,7 +543,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -543,7 +566,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       operationId: getUserByName
       parameters:
@@ -572,7 +596,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -602,7 +628,8 @@ paths:
       - user
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +655,8 @@ paths:
       - fake_classname_tags 123#$%^
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -677,7 +705,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -762,7 +791,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -785,7 +815,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |-
         Fake endpoint for testing various parameters
@@ -816,7 +847,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -839,7 +871,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -862,7 +895,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -885,7 +919,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -908,7 +943,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: '*/*'
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       operationId: testJsonFormData
@@ -926,7 +962,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       operationId: testInlineAdditionalProperties
@@ -948,7 +985,8 @@ paths:
       - fake
       x-codegen-request-body-name: param
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -972,7 +1010,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/create_xml_item:
     post:
       description: this route creates an XmlItem
@@ -1008,7 +1047,8 @@ paths:
       - fake
       x-codegen-request-body-name: XmlItem
       x-content-type: application/xml
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1040,7 +1080,8 @@ paths:
       - $another-fake?
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1060,7 +1101,8 @@ paths:
       - fake
       x-codegen-request-body-name: body
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1114,7 +1156,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       operationId: uploadFileWithRequiredFile
@@ -1147,7 +1190,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Order:

samples/client/petstore/java/vertx/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -70,7 +71,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -94,7 +96,8 @@ paths:
       - pet
       x-webclient-blocking: true
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -158,7 +161,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -203,7 +208,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -237,7 +244,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -271,7 +279,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -303,7 +313,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -338,7 +349,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -359,7 +371,8 @@ paths:
       tags:
       - store
       x-webclient-blocking: false
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -387,7 +400,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -410,7 +425,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -444,7 +460,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -463,7 +481,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -477,7 +496,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -491,7 +511,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -543,7 +564,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -554,7 +577,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -576,7 +600,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -606,7 +631,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -635,7 +662,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -655,7 +683,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -720,7 +749,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -826,7 +856,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -843,7 +874,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -871,7 +903,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -892,7 +925,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/property/enum-int:
     post:
       description: Test serialization of enum (int) properties with examples
@@ -914,7 +948,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -935,7 +970,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -956,7 +992,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -977,7 +1014,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -992,7 +1030,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -1009,7 +1048,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -1028,7 +1068,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -1047,7 +1088,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1068,7 +1110,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1087,7 +1130,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/nullable:
     post:
       description: ""
@@ -1106,7 +1150,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1130,7 +1175,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1148,7 +1194,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request must reference a schema\
@@ -1166,7 +1213,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-binary:
     put:
       description: "For this test, the body has to be a binary file."
@@ -1186,7 +1234,8 @@ paths:
       tags:
       - fake
       x-content-type: image/png
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1260,7 +1309,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1295,7 +1345,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1308,7 +1359,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/http-signature-test:
     get:
       operationId: fake-http-signature-test
@@ -1340,7 +1392,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/webclient-jakarta/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -70,7 +71,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -94,7 +96,8 @@ paths:
       - pet
       x-webclient-blocking: true
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -158,7 +161,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -203,7 +208,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -237,7 +244,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -271,7 +279,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -303,7 +313,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -338,7 +349,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -359,7 +371,8 @@ paths:
       tags:
       - store
       x-webclient-blocking: false
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -387,7 +400,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -410,7 +425,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -444,7 +460,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -463,7 +481,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -477,7 +496,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -491,7 +511,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -543,7 +564,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -554,7 +577,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -576,7 +600,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -606,7 +631,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -635,7 +662,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -655,7 +683,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -720,7 +749,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -826,7 +856,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -843,7 +874,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -871,7 +903,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -892,7 +925,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/property/enum-int:
     post:
       description: Test serialization of enum (int) properties with examples
@@ -914,7 +948,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -935,7 +970,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -956,7 +992,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -977,7 +1014,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -992,7 +1030,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -1009,7 +1048,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -1028,7 +1068,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -1047,7 +1088,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1068,7 +1110,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1087,7 +1130,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/nullable:
     post:
       description: ""
@@ -1106,7 +1150,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1130,7 +1175,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1148,7 +1194,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request must reference a schema\
@@ -1166,7 +1213,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-binary:
     put:
       description: "For this test, the body has to be a binary file."
@@ -1186,7 +1234,8 @@ paths:
       tags:
       - fake
       x-content-type: image/png
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1260,7 +1309,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1295,7 +1345,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1308,7 +1359,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/http-signature-test:
     get:
       operationId: fake-http-signature-test
@@ -1340,7 +1392,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/webclient-nullable-arrays/api/openapi.yaml

@@ -21,7 +21,8 @@ paths:
                 type: array
           description: ""
       summary: ""
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     ByteArrayObject:

samples/client/petstore/java/webclient-swagger2/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -70,7 +71,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -94,7 +96,8 @@ paths:
       - pet
       x-webclient-blocking: true
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -158,7 +161,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -203,7 +208,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -237,7 +244,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -271,7 +279,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -303,7 +313,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -338,7 +349,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -359,7 +371,8 @@ paths:
       tags:
       - store
       x-webclient-blocking: false
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -387,7 +400,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -410,7 +425,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -444,7 +460,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -463,7 +481,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -477,7 +496,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -491,7 +511,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -543,7 +564,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -554,7 +577,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -576,7 +600,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -606,7 +631,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -635,7 +662,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -655,7 +683,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -720,7 +749,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -826,7 +856,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -843,7 +874,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -871,7 +903,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -892,7 +925,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/property/enum-int:
     post:
       description: Test serialization of enum (int) properties with examples
@@ -914,7 +948,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -935,7 +970,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -956,7 +992,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -977,7 +1014,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -992,7 +1030,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -1009,7 +1048,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -1028,7 +1068,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -1047,7 +1088,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1068,7 +1110,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1087,7 +1130,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/nullable:
     post:
       description: ""
@@ -1106,7 +1150,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1130,7 +1175,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1148,7 +1194,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request must reference a schema\
@@ -1166,7 +1213,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-binary:
     put:
       description: "For this test, the body has to be a binary file."
@@ -1186,7 +1234,8 @@ paths:
       tags:
       - fake
       x-content-type: image/png
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1260,7 +1309,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1295,7 +1345,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1308,7 +1359,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/http-signature-test:
     get:
       operationId: fake-http-signature-test
@@ -1340,7 +1392,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/java/webclient/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -70,7 +71,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -94,7 +96,8 @@ paths:
       - pet
       x-webclient-blocking: true
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -158,7 +161,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -203,7 +208,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -237,7 +244,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -271,7 +279,9 @@ paths:
       tags:
       - pet
       x-webclient-blocking: true
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -303,7 +313,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -338,7 +349,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -359,7 +371,8 @@ paths:
       tags:
       - store
       x-webclient-blocking: false
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -387,7 +400,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -410,7 +425,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -444,7 +460,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -463,7 +481,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -477,7 +496,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -491,7 +511,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -543,7 +564,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -554,7 +577,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -576,7 +600,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -606,7 +631,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -635,7 +662,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -655,7 +683,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -720,7 +749,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -826,7 +856,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -843,7 +874,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -871,7 +903,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -892,7 +925,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/property/enum-int:
     post:
       description: Test serialization of enum (int) properties with examples
@@ -914,7 +948,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -935,7 +970,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -956,7 +992,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -977,7 +1014,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/BigDecimalMap:
     get:
       description: "for Java apache and Java native, test toUrlQueryString for maps\
@@ -992,7 +1030,8 @@ paths:
           description: successful operation
       tags:
       - fake
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -1009,7 +1048,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -1028,7 +1068,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -1047,7 +1088,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -1068,7 +1110,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1087,7 +1130,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/nullable:
     post:
       description: ""
@@ -1106,7 +1150,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1130,7 +1175,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1148,7 +1194,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request must reference a schema\
@@ -1166,7 +1213,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-binary:
     put:
       description: "For this test, the body has to be a binary file."
@@ -1186,7 +1234,8 @@ paths:
       tags:
       - fake
       x-content-type: image/png
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1260,7 +1309,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1295,7 +1345,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1308,7 +1359,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/http-signature-test:
     get:
       operationId: fake-http-signature-test
@@ -1340,7 +1392,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/client/petstore/spring-cloud-deprecated/src/main/java/org/openapitools/api/PetApi.java

@@ -126,7 +126,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByStatus",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByStatus(
@@ -164,7 +164,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByTags",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByTags(
@@ -201,7 +201,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/{petId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Pet> getPetById(
@@ -303,7 +303,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet/{petId}/uploadImage",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "multipart/form-data"
     )
     

samples/client/petstore/spring-cloud-deprecated/src/main/java/org/openapitools/api/StoreApi.java

@@ -89,7 +89,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/inventory",
-        produces = "application/json"
+        produces = { "application/json" }
     )
     
     ResponseEntity<Map<String, Integer>> getInventory(
@@ -123,7 +123,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/order/{orderId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Order> getOrderById(
@@ -155,7 +155,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/store/order",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     

samples/client/petstore/spring-cloud-deprecated/src/main/java/org/openapitools/api/UserApi.java

@@ -185,7 +185,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/{username}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<User> getUserByName(
@@ -218,7 +218,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/login",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<String> loginUser(

samples/client/petstore/spring-cloud-feign-without-url/src/main/java/org/openapitools/api/PetApi.java

@@ -56,7 +56,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     
@@ -127,7 +127,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByStatus",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByStatus(
@@ -165,7 +165,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByTags",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByTags(
@@ -200,7 +200,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/{petId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Pet> getPetById(
@@ -242,7 +242,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.PUT,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     
@@ -316,7 +316,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet/{petId}/uploadImage",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "multipart/form-data"
     )
     

samples/client/petstore/spring-cloud-feign-without-url/src/main/java/org/openapitools/api/StoreApi.java

@@ -79,7 +79,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/inventory",
-        produces = "application/json"
+        produces = { "application/json" }
     )
     
     ResponseEntity<Map<String, Integer>> getInventory(
@@ -111,7 +111,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/order/{orderId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Order> getOrderById(
@@ -141,7 +141,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/store/order",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     

samples/client/petstore/spring-cloud-feign-without-url/src/main/java/org/openapitools/api/UserApi.java

@@ -173,7 +173,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/{username}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<User> getUserByName(
@@ -204,7 +204,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/login",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<String> loginUser(

samples/client/petstore/spring-cloud-tags/src/main/java/org/openapitools/api/PetController.java

@@ -124,7 +124,7 @@ public interface PetController {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByStatus",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByStatus(
@@ -164,7 +164,7 @@ public interface PetController {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByTags",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByTags(
@@ -200,7 +200,7 @@ public interface PetController {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/{petId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Pet> getPetById(
@@ -307,7 +307,7 @@ public interface PetController {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet/{petId}/uploadImage",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "multipart/form-data"
     )
     

samples/client/petstore/spring-cloud-tags/src/main/java/org/openapitools/api/StoreController.java

@@ -79,7 +79,7 @@ public interface StoreController {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/inventory",
-        produces = "application/json"
+        produces = { "application/json" }
     )
     
     ResponseEntity<Map<String, Integer>> getInventory(
@@ -111,7 +111,7 @@ public interface StoreController {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/order/{orderId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Order> getOrderById(
@@ -140,7 +140,7 @@ public interface StoreController {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/store/order",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Order> placeOrder(

samples/client/petstore/spring-cloud-tags/src/main/java/org/openapitools/api/UserController.java

@@ -155,7 +155,7 @@ public interface UserController {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/{username}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<User> getUserByName(
@@ -185,7 +185,7 @@ public interface UserController {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/login",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<String> loginUser(

samples/client/petstore/spring-cloud/src/main/java/org/openapitools/api/PetApi.java

@@ -56,7 +56,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     
@@ -127,7 +127,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByStatus",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByStatus(
@@ -165,7 +165,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByTags",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByTags(
@@ -200,7 +200,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/{petId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Pet> getPetById(
@@ -242,7 +242,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.PUT,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     
@@ -316,7 +316,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet/{petId}/uploadImage",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "multipart/form-data"
     )
     

samples/client/petstore/spring-cloud/src/main/java/org/openapitools/api/StoreApi.java

@@ -79,7 +79,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/inventory",
-        produces = "application/json"
+        produces = { "application/json" }
     )
     
     ResponseEntity<Map<String, Integer>> getInventory(
@@ -111,7 +111,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/order/{orderId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Order> getOrderById(
@@ -141,7 +141,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/store/order",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     

samples/client/petstore/spring-cloud/src/main/java/org/openapitools/api/UserApi.java

@@ -173,7 +173,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/{username}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<User> getUserByName(
@@ -204,7 +204,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/login",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<String> loginUser(

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/api/AnotherFakeApi.java

@@ -34,7 +34,7 @@ public interface AnotherFakeApi {
     @HttpExchange(
         method = "PATCH",
         value = "/another-fake/dummy",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Client>> call123testSpecialTags(

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/api/FakeApi.java

@@ -44,7 +44,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/create_xml_item",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/xml"
     )
     Mono<ResponseEntity<Void>> createXmlItem(
@@ -62,7 +62,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/outer/boolean",
-        accept = "*/*",
+        accept = { "*/*" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Boolean>> fakeOuterBooleanSerialize(
@@ -80,7 +80,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/outer/composite",
-        accept = "*/*",
+        accept = { "*/*" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<OuterComposite>> fakeOuterCompositeSerialize(
@@ -98,7 +98,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/outer/number",
-        accept = "*/*",
+        accept = { "*/*" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<BigDecimal>> fakeOuterNumberSerialize(
@@ -116,7 +116,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/outer/string",
-        accept = "*/*",
+        accept = { "*/*" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<String>> fakeOuterStringSerialize(
@@ -134,7 +134,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "PUT",
         value = "/fake/body-with-file-schema",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Void>> testBodyWithFileSchema(
@@ -152,7 +152,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "PUT",
         value = "/fake/body-with-query-params",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Void>> testBodyWithQueryParams(
@@ -171,7 +171,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "PATCH",
         value = "/fake",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Client>> testClientModel(
@@ -203,7 +203,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/x-www-form-urlencoded"
     )
     Mono<ResponseEntity<Void>> testEndpointParameters(
@@ -242,7 +242,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "GET",
         value = "/fake",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/x-www-form-urlencoded"
     )
     Mono<ResponseEntity<Void>> testEnumParameters(
@@ -272,7 +272,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "DELETE",
         value = "/fake",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     Mono<ResponseEntity<Void>> testGroupParameters(
          @RequestParam(value = "required_string_group", required = true) Integer requiredStringGroup,
@@ -294,7 +294,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/inline-additionalProperties",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Void>> testInlineAdditionalProperties(
@@ -313,7 +313,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "GET",
         value = "/fake/jsonFormData",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/x-www-form-urlencoded"
     )
     Mono<ResponseEntity<Void>> testJsonFormData(
@@ -332,7 +332,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/nullable",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Void>> testNullable(
@@ -353,7 +353,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "PUT",
         value = "/fake/test-query-parameters",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     Mono<ResponseEntity<Void>> testQueryParameterCollectionFormat(
          @RequestParam(value = "pipe", required = true) List<String> pipe,
@@ -372,7 +372,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "GET",
         value = "/fake/response-with-example",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     Mono<ResponseEntity<Integer>> testWithResultExample(
         

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/api/FakeClassnameTags123Api.java

@@ -34,7 +34,7 @@ public interface FakeClassnameTags123Api {
     @HttpExchange(
         method = "PATCH",
         value = "/fake_classname_test",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Client>> testClassname(

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/api/PetApi.java

@@ -38,7 +38,7 @@ public interface PetApi {
     @HttpExchange(
         method = "POST",
         value = "/pet",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Void>> addPet(
@@ -58,7 +58,7 @@ public interface PetApi {
     @HttpExchange(
         method = "DELETE",
         value = "/pet/{petId}",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     Mono<ResponseEntity<Void>> deletePet(
          @PathVariable("petId") Long petId,
@@ -77,7 +77,7 @@ public interface PetApi {
     @HttpExchange(
         method = "GET",
         value = "/pet/findByStatus",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     Mono<ResponseEntity<Flux<Pet>>> findPetsByStatus(
          @RequestParam(value = "status", required = true) List<String> status
@@ -97,7 +97,7 @@ public interface PetApi {
     @HttpExchange(
         method = "GET",
         value = "/pet/findByTags",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     Mono<ResponseEntity<Flux<Pet>>> findPetsByTags(
          @RequestParam(value = "tags", required = true) Set<String> tags
@@ -116,7 +116,7 @@ public interface PetApi {
     @HttpExchange(
         method = "GET",
         value = "/pet/{petId}",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     Mono<ResponseEntity<Pet>> getPetById(
          @PathVariable("petId") Long petId
@@ -132,7 +132,7 @@ public interface PetApi {
     @HttpExchange(
         method = "GET",
         value = "/fake/{petId}/response-object-different-names",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     Mono<ResponseEntity<ResponseObjectWithDifferentFieldNames>> responseObjectDifferentNames(
          @PathVariable("petId") Long petId
@@ -152,7 +152,7 @@ public interface PetApi {
     @HttpExchange(
         method = "PUT",
         value = "/pet",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Void>> updatePet(
@@ -172,7 +172,7 @@ public interface PetApi {
     @HttpExchange(
         method = "POST",
         value = "/pet/{petId}",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/x-www-form-urlencoded"
     )
     Mono<ResponseEntity<Void>> updatePetWithForm(
@@ -194,7 +194,7 @@ public interface PetApi {
     @HttpExchange(
         method = "POST",
         value = "/pet/{petId}/uploadImage",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "multipart/form-data"
     )
     Mono<ResponseEntity<ModelApiResponse>> uploadFile(
@@ -216,7 +216,7 @@ public interface PetApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/{petId}/uploadImageWithRequiredFile",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "multipart/form-data"
     )
     Mono<ResponseEntity<ModelApiResponse>> uploadFileWithRequiredFile(

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/api/StoreApi.java

@@ -36,7 +36,7 @@ public interface StoreApi {
     @HttpExchange(
         method = "DELETE",
         value = "/store/order/{order_id}",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     Mono<ResponseEntity<Void>> deleteOrder(
          @PathVariable("order_id") String orderId
@@ -52,7 +52,7 @@ public interface StoreApi {
     @HttpExchange(
         method = "GET",
         value = "/store/inventory",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     Mono<ResponseEntity<Map<String, Integer>>> getInventory(
         
@@ -71,7 +71,7 @@ public interface StoreApi {
     @HttpExchange(
         method = "GET",
         value = "/store/order/{order_id}",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     Mono<ResponseEntity<Order>> getOrderById(
          @PathVariable("order_id") Long orderId
@@ -89,7 +89,7 @@ public interface StoreApi {
     @HttpExchange(
         method = "POST",
         value = "/store/order",
-        accept = "application/json,application/xml",
+        accept = { "application/json", "application/xml" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Order>> placeOrder(

samples/client/petstore/spring-http-interface-reactive/src/main/java/org/openapitools/api/UserApi.java

@@ -35,7 +35,7 @@ public interface UserApi {
     @HttpExchange(
         method = "POST",
         value = "/user",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Void>> createUser(
@@ -53,7 +53,7 @@ public interface UserApi {
     @HttpExchange(
         method = "POST",
         value = "/user/createWithArray",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Void>> createUsersWithArrayInput(
@@ -71,7 +71,7 @@ public interface UserApi {
     @HttpExchange(
         method = "POST",
         value = "/user/createWithList",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Void>> createUsersWithListInput(
@@ -90,7 +90,7 @@ public interface UserApi {
     @HttpExchange(
         method = "DELETE",
         value = "/user/{username}",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     Mono<ResponseEntity<Void>> deleteUser(
          @PathVariable("username") String username
@@ -109,7 +109,7 @@ public interface UserApi {
     @HttpExchange(
         method = "GET",
         value = "/user/{username}",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     Mono<ResponseEntity<User>> getUserByName(
          @PathVariable("username") String username
@@ -128,7 +128,7 @@ public interface UserApi {
     @HttpExchange(
         method = "GET",
         value = "/user/login",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     Mono<ResponseEntity<String>> loginUser(
          @RequestParam(value = "username", required = true) String username,
@@ -145,7 +145,7 @@ public interface UserApi {
     @HttpExchange(
         method = "GET",
         value = "/user/logout",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     Mono<ResponseEntity<Void>> logoutUser(
         
@@ -164,7 +164,7 @@ public interface UserApi {
     @HttpExchange(
         method = "PUT",
         value = "/user/{username}",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     Mono<ResponseEntity<Void>> updateUser(

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/api/AnotherFakeApi.java

@@ -30,7 +30,7 @@ public interface AnotherFakeApi {
     @HttpExchange(
         method = "PATCH",
         value = "/another-fake/dummy",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<ClientDto> call123testSpecialTags(

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/api/FakeApi.java

@@ -40,7 +40,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/create_xml_item",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/xml"
     )
     ResponseEntity<Void> createXmlItem(
@@ -58,7 +58,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/outer/boolean",
-        accept = "*/*",
+        accept = { "*/*" },
         contentType = "application/json"
     )
     ResponseEntity<Boolean> fakeOuterBooleanSerialize(
@@ -76,7 +76,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/outer/composite",
-        accept = "*/*",
+        accept = { "*/*" },
         contentType = "application/json"
     )
     ResponseEntity<OuterCompositeDto> fakeOuterCompositeSerialize(
@@ -94,7 +94,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/outer/number",
-        accept = "*/*",
+        accept = { "*/*" },
         contentType = "application/json"
     )
     ResponseEntity<BigDecimal> fakeOuterNumberSerialize(
@@ -112,7 +112,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/outer/string",
-        accept = "*/*",
+        accept = { "*/*" },
         contentType = "application/json"
     )
     ResponseEntity<String> fakeOuterStringSerialize(
@@ -130,7 +130,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "PUT",
         value = "/fake/body-with-file-schema",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<Void> testBodyWithFileSchema(
@@ -148,7 +148,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "PUT",
         value = "/fake/body-with-query-params",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<Void> testBodyWithQueryParams(
@@ -167,7 +167,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "PATCH",
         value = "/fake",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<ClientDto> testClientModel(
@@ -199,7 +199,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/x-www-form-urlencoded"
     )
     ResponseEntity<Void> testEndpointParameters(
@@ -238,7 +238,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "GET",
         value = "/fake",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/x-www-form-urlencoded"
     )
     ResponseEntity<Void> testEnumParameters(
@@ -268,7 +268,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "DELETE",
         value = "/fake",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     ResponseEntity<Void> testGroupParameters(
          @RequestParam(value = "required_string_group", required = true) Integer requiredStringGroup,
@@ -290,7 +290,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/inline-additionalProperties",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<Void> testInlineAdditionalProperties(
@@ -309,7 +309,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "GET",
         value = "/fake/jsonFormData",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/x-www-form-urlencoded"
     )
     ResponseEntity<Void> testJsonFormData(
@@ -328,7 +328,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/nullable",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<Void> testNullable(
@@ -349,7 +349,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "PUT",
         value = "/fake/test-query-parameters",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     ResponseEntity<Void> testQueryParameterCollectionFormat(
          @RequestParam(value = "pipe", required = true) List<String> pipe,
@@ -368,7 +368,7 @@ public interface FakeApi {
     @HttpExchange(
         method = "GET",
         value = "/fake/response-with-example",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     ResponseEntity<Integer> testWithResultExample(
         

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/api/FakeClassnameTags123Api.java

@@ -30,7 +30,7 @@ public interface FakeClassnameTags123Api {
     @HttpExchange(
         method = "PATCH",
         value = "/fake_classname_test",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<ClientDto> testClassname(

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/api/PetApi.java

@@ -34,7 +34,7 @@ public interface PetApi {
     @HttpExchange(
         method = "POST",
         value = "/pet",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<Void> addPet(
@@ -54,7 +54,7 @@ public interface PetApi {
     @HttpExchange(
         method = "DELETE",
         value = "/pet/{petId}",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     ResponseEntity<Void> deletePet(
          @PathVariable("petId") Long petId,
@@ -73,7 +73,7 @@ public interface PetApi {
     @HttpExchange(
         method = "GET",
         value = "/pet/findByStatus",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     ResponseEntity<List<PetDto>> findPetsByStatus(
          @RequestParam(value = "status", required = true) List<String> status
@@ -93,7 +93,7 @@ public interface PetApi {
     @HttpExchange(
         method = "GET",
         value = "/pet/findByTags",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     ResponseEntity<Set<PetDto>> findPetsByTags(
          @RequestParam(value = "tags", required = true) Set<String> tags
@@ -112,7 +112,7 @@ public interface PetApi {
     @HttpExchange(
         method = "GET",
         value = "/pet/{petId}",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     ResponseEntity<PetDto> getPetById(
          @PathVariable("petId") Long petId
@@ -128,7 +128,7 @@ public interface PetApi {
     @HttpExchange(
         method = "GET",
         value = "/fake/{petId}/response-object-different-names",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     ResponseEntity<ResponseObjectWithDifferentFieldNamesDto> responseObjectDifferentNames(
          @PathVariable("petId") Long petId
@@ -148,7 +148,7 @@ public interface PetApi {
     @HttpExchange(
         method = "PUT",
         value = "/pet",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<Void> updatePet(
@@ -168,7 +168,7 @@ public interface PetApi {
     @HttpExchange(
         method = "POST",
         value = "/pet/{petId}",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/x-www-form-urlencoded"
     )
     ResponseEntity<Void> updatePetWithForm(
@@ -190,7 +190,7 @@ public interface PetApi {
     @HttpExchange(
         method = "POST",
         value = "/pet/{petId}/uploadImage",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "multipart/form-data"
     )
     ResponseEntity<ApiResponseDto> uploadFile(
@@ -212,7 +212,7 @@ public interface PetApi {
     @HttpExchange(
         method = "POST",
         value = "/fake/{petId}/uploadImageWithRequiredFile",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "multipart/form-data"
     )
     ResponseEntity<ApiResponseDto> uploadFileWithRequiredFile(

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/api/StoreApi.java

@@ -32,7 +32,7 @@ public interface StoreApi {
     @HttpExchange(
         method = "DELETE",
         value = "/store/order/{order_id}",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     ResponseEntity<Void> deleteOrder(
          @PathVariable("order_id") String orderId
@@ -48,7 +48,7 @@ public interface StoreApi {
     @HttpExchange(
         method = "GET",
         value = "/store/inventory",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     ResponseEntity<Map<String, Integer>> getInventory(
         
@@ -67,7 +67,7 @@ public interface StoreApi {
     @HttpExchange(
         method = "GET",
         value = "/store/order/{order_id}",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     ResponseEntity<OrderDto> getOrderById(
          @PathVariable("order_id") Long orderId
@@ -85,7 +85,7 @@ public interface StoreApi {
     @HttpExchange(
         method = "POST",
         value = "/store/order",
-        accept = "application/json,application/xml",
+        accept = { "application/json", "application/xml" },
         contentType = "application/json"
     )
     ResponseEntity<OrderDto> placeOrder(

samples/client/petstore/spring-http-interface/src/main/java/org/openapitools/api/UserApi.java

@@ -31,7 +31,7 @@ public interface UserApi {
     @HttpExchange(
         method = "POST",
         value = "/user",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<Void> createUser(
@@ -49,7 +49,7 @@ public interface UserApi {
     @HttpExchange(
         method = "POST",
         value = "/user/createWithArray",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<Void> createUsersWithArrayInput(
@@ -67,7 +67,7 @@ public interface UserApi {
     @HttpExchange(
         method = "POST",
         value = "/user/createWithList",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<Void> createUsersWithListInput(
@@ -86,7 +86,7 @@ public interface UserApi {
     @HttpExchange(
         method = "DELETE",
         value = "/user/{username}",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     ResponseEntity<Void> deleteUser(
          @PathVariable("username") String username
@@ -105,7 +105,7 @@ public interface UserApi {
     @HttpExchange(
         method = "GET",
         value = "/user/{username}",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     ResponseEntity<UserDto> getUserByName(
          @PathVariable("username") String username
@@ -124,7 +124,7 @@ public interface UserApi {
     @HttpExchange(
         method = "GET",
         value = "/user/login",
-        accept = "application/json,application/xml"
+        accept = { "application/json", "application/xml" }
     )
     ResponseEntity<String> loginUser(
          @RequestParam(value = "username", required = true) String username,
@@ -141,7 +141,7 @@ public interface UserApi {
     @HttpExchange(
         method = "GET",
         value = "/user/logout",
-        accept = "application/json"
+        accept = { "application/json" }
     )
     ResponseEntity<Void> logoutUser(
         
@@ -160,7 +160,7 @@ public interface UserApi {
     @HttpExchange(
         method = "PUT",
         value = "/user/{username}",
-        accept = "application/json",
+        accept = { "application/json" },
         contentType = "application/json"
     )
     ResponseEntity<Void> updateUser(

samples/openapi3/client/extensions/x-auth-id-alias/java/jersey2-java8/api/openapi.yaml

@@ -51,7 +51,8 @@ paths:
       summary: Use both API keys
       tags:
       - usage
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /any:
     get:
       description: Use any API key
@@ -69,7 +70,8 @@ paths:
       summary: Use any API key
       tags:
       - usage
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /query:
     get:
       description: Use API key in query
@@ -86,7 +88,8 @@ paths:
       summary: Use API key in query
       tags:
       - usage
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /header:
     get:
       description: Use API key in header
@@ -103,7 +106,8 @@ paths:
       summary: Use API key in header
       tags:
       - usage
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas: {}
   securitySchemes:

samples/openapi3/client/petstore/java/jersey2-java8-special-characters/api/openapi.yaml

@@ -21,7 +21,8 @@ paths:
                 $ref: '#/components/schemas/MySchemaName._-Characters'
           description: the response
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   schemas:
     Parent:

samples/openapi3/client/petstore/java/jersey2-java8-swagger1/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       externalDocs:
@@ -79,7 +81,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -123,7 +127,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -163,7 +169,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -195,7 +203,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -228,7 +237,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -258,7 +269,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -293,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -313,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -341,7 +355,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -364,7 +380,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -398,7 +415,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -419,7 +438,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -435,7 +455,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -451,7 +472,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -512,7 +534,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -525,7 +549,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +574,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +605,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -610,7 +638,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/openapi3/client/petstore/java/jersey2-java8-swagger2/api/openapi.yaml

@@ -46,7 +46,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: ""
       externalDocs:
@@ -79,7 +81,9 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByStatus:
     get:
       description: Multiple status values can be provided with comma separated strings
@@ -123,7 +127,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -163,7 +169,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -195,7 +203,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -228,7 +237,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -258,7 +269,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -293,7 +305,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -313,7 +326,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -341,7 +355,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{orderId}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -364,7 +380,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -398,7 +415,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -419,7 +438,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -435,7 +455,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -451,7 +472,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -512,7 +534,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -525,7 +549,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +574,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +605,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -610,7 +638,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/openapi3/client/petstore/java/jersey2-java8/api/openapi.yaml

@@ -50,7 +50,8 @@ paths:
               schema:
                 $ref: '#/components/schemas/_foo_get_default_response'
           description: response
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet:
     post:
       description: ""
@@ -69,7 +70,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     put:
       description: ""
       operationId: updatePet
@@ -91,7 +93,8 @@ paths:
       tags:
       - pet
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     servers:
     - url: http://petstore.swagger.io/v2
     - url: http://path-server-test.petstore.local/v2
@@ -140,7 +143,9 @@ paths:
       summary: Finds Pets by status
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/findByTags:
     get:
       deprecated: true
@@ -182,7 +187,9 @@ paths:
       summary: Finds Pets by tags
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /pet/{petId}:
     delete:
       description: ""
@@ -214,7 +221,8 @@ paths:
       summary: Deletes a pet
       tags:
       - pet
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: Returns a single pet
       operationId: getPetById
@@ -247,7 +255,9 @@ paths:
       summary: Find pet by ID
       tags:
       - pet
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     post:
       description: ""
       operationId: updatePetWithForm
@@ -277,7 +287,8 @@ paths:
       tags:
       - pet
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /pet/{petId}/uploadImage:
     post:
       description: ""
@@ -312,7 +323,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/inventory:
     get:
       description: Returns a map of status codes to quantities
@@ -332,7 +344,8 @@ paths:
       summary: Returns pet inventories by status
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /store/order:
     post:
       description: ""
@@ -360,7 +373,9 @@ paths:
       tags:
       - store
       x-content-type: application/json
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /store/order/{order_id}:
     delete:
       description: For valid response try integer IDs with value < 1000. Anything
@@ -383,7 +398,8 @@ paths:
       summary: Delete purchase order by ID
       tags:
       - store
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
         values will generate exceptions
@@ -417,7 +433,9 @@ paths:
       summary: Find purchase order by ID
       tags:
       - store
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user:
     post:
       description: This can only be done by the logged in user.
@@ -436,7 +454,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithArray:
     post:
       description: ""
@@ -450,7 +469,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/createWithList:
     post:
       description: ""
@@ -464,7 +484,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/login:
     get:
       description: ""
@@ -516,7 +537,9 @@ paths:
       summary: Logs user into the system
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
   /user/logout:
     get:
       description: ""
@@ -527,7 +550,8 @@ paths:
       summary: Logs out current logged in user session
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /user/{username}:
     delete:
       description: This can only be done by the logged in user.
@@ -549,7 +573,8 @@ paths:
       summary: Delete user
       tags:
       - user
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: ""
       operationId: getUserByName
@@ -579,7 +604,9 @@ paths:
       summary: Get user by user name
       tags:
       - user
-      x-accepts: "application/json,application/xml"
+      x-accepts:
+      - application/json
+      - application/xml
     put:
       description: This can only be done by the logged in user.
       operationId: updateUser
@@ -608,7 +635,8 @@ paths:
       tags:
       - user
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake_classname_test:
     patch:
       description: To test class name in snake case
@@ -628,7 +656,8 @@ paths:
       tags:
       - fake_classname_tags 123#$%^
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake:
     delete:
       description: Fake endpoint to test group parameters (optional)
@@ -693,7 +722,8 @@ paths:
       tags:
       - fake
       x-group-parameters: true
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     get:
       description: To test enum parameters
       operationId: testEnumParameters
@@ -790,7 +820,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     patch:
       description: To test "client" model
       operationId: testClientModel
@@ -807,7 +838,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
     post:
       description: |
         Fake endpoint for testing various parameters
@@ -835,7 +867,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/outer/number:
     post:
       description: Test serialization of outer number types
@@ -856,7 +889,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/string:
     post:
       description: Test serialization of outer string types
@@ -877,7 +911,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/boolean:
     post:
       description: Test serialization of outer boolean types
@@ -898,7 +933,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/outer/composite:
     post:
       description: Test serialization of object with outer number type
@@ -919,7 +955,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: '*/*'
+      x-accepts:
+      - '*/*'
   /fake/jsonFormData:
     get:
       description: ""
@@ -936,7 +973,8 @@ paths:
       tags:
       - fake
       x-content-type: application/x-www-form-urlencoded
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/additionalProperties-reference:
     post:
       description: ""
@@ -955,7 +993,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/stringMap-reference:
     post:
       description: ""
@@ -974,7 +1013,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-additionalProperties:
     post:
       description: ""
@@ -995,7 +1035,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/inline-freeform-additionalProperties:
     post:
       description: ""
@@ -1014,7 +1055,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-query-params:
     put:
       operationId: testBodyWithQueryParams
@@ -1038,7 +1080,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /another-fake/dummy:
     patch:
       description: To test special tags and operation ID starting with number
@@ -1056,7 +1099,8 @@ paths:
       tags:
       - $another-fake?
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/body-with-file-schema:
     put:
       description: "For this test, the body for this request much reference a schema\
@@ -1074,7 +1118,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters
@@ -1130,7 +1175,8 @@ paths:
           description: Success
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/{petId}/uploadImageWithRequiredFile:
     post:
       description: ""
@@ -1165,7 +1211,8 @@ paths:
       tags:
       - pet
       x-content-type: multipart/form-data
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/health:
     get:
       responses:
@@ -1178,7 +1225,8 @@ paths:
       summary: Health check endpoint
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/array-of-enums:
     get:
       operationId: getArrayOfEnums
@@ -1192,7 +1240,8 @@ paths:
       summary: Array of Enums
       tags:
       - fake
-      x-accepts: application/json
+      x-accepts:
+      - application/json
   /fake/request-array-string:
     post:
       operationId: postArrayOfString
@@ -1211,7 +1260,8 @@ paths:
       tags:
       - fake
       x-content-type: application/json
-      x-accepts: application/json
+      x-accepts:
+      - application/json
 components:
   requestBodies:
     UserArray:

samples/openapi3/client/petstore/spring-cloud-3-with-optional/src/main/java/org/openapitools/api/PetApi.java

@@ -37,7 +37,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     
@@ -76,7 +76,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByStatus",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByStatus(
@@ -97,7 +97,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByTags",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByTags(
@@ -117,7 +117,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/{petId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Pet> getPetById(
@@ -140,7 +140,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.PUT,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     
@@ -183,7 +183,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet/{petId}/uploadImage",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "multipart/form-data"
     )
     

samples/openapi3/client/petstore/spring-cloud-3-with-optional/src/main/java/org/openapitools/api/StoreApi.java

@@ -53,7 +53,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/inventory",
-        produces = "application/json"
+        produces = { "application/json" }
     )
     
     ResponseEntity<Map<String, Integer>> getInventory(
@@ -73,7 +73,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/order/{orderId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Order> getOrderById(
@@ -92,7 +92,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/store/order",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     

samples/openapi3/client/petstore/spring-cloud-3-with-optional/src/main/java/org/openapitools/api/UserApi.java

@@ -110,7 +110,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/{username}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<User> getUserByName(
@@ -130,7 +130,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/login",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<String> loginUser(

samples/openapi3/client/petstore/spring-cloud-3/src/main/java/org/openapitools/api/PetApi.java

@@ -65,7 +65,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     
@@ -132,7 +132,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByStatus",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByStatus(
@@ -170,7 +170,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByTags",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByTags(
@@ -207,7 +207,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/{petId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Pet> getPetById(
@@ -249,7 +249,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.PUT,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     
@@ -318,7 +318,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet/{petId}/uploadImage",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "multipart/form-data"
     )
     

samples/openapi3/client/petstore/spring-cloud-3/src/main/java/org/openapitools/api/StoreApi.java

@@ -89,7 +89,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/inventory",
-        produces = "application/json"
+        produces = { "application/json" }
     )
     
     ResponseEntity<Map<String, Integer>> getInventory(
@@ -123,7 +123,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/order/{orderId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Order> getOrderById(
@@ -155,7 +155,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/store/order",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     

samples/openapi3/client/petstore/spring-cloud-3/src/main/java/org/openapitools/api/UserApi.java

@@ -185,7 +185,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/{username}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<User> getUserByName(
@@ -218,7 +218,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/login",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<String> loginUser(

samples/openapi3/client/petstore/spring-cloud-async/src/main/java/org/openapitools/api/PetApi.java

@@ -66,7 +66,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     
@@ -133,7 +133,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByStatus",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     CompletableFuture<ResponseEntity<List<Pet>>> findPetsByStatus(
@@ -171,7 +171,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByTags",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     CompletableFuture<ResponseEntity<List<Pet>>> findPetsByTags(
@@ -208,7 +208,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/{petId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     CompletableFuture<ResponseEntity<Pet>> getPetById(
@@ -250,7 +250,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.PUT,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     
@@ -319,7 +319,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet/{petId}/uploadImage",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "multipart/form-data"
     )
     

samples/openapi3/client/petstore/spring-cloud-async/src/main/java/org/openapitools/api/StoreApi.java

@@ -90,7 +90,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/inventory",
-        produces = "application/json"
+        produces = { "application/json" }
     )
     
     CompletableFuture<ResponseEntity<Map<String, Integer>>> getInventory(
@@ -124,7 +124,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/order/{orderId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     CompletableFuture<ResponseEntity<Order>> getOrderById(
@@ -156,7 +156,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/store/order",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     

samples/openapi3/client/petstore/spring-cloud-async/src/main/java/org/openapitools/api/UserApi.java

@@ -186,7 +186,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/{username}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     CompletableFuture<ResponseEntity<User>> getUserByName(
@@ -219,7 +219,7 @@ public interface UserApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/user/login",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     CompletableFuture<ResponseEntity<String>> loginUser(

samples/openapi3/client/petstore/spring-cloud-http-basic/src/main/java/org/openapitools/api/PetApi.java

@@ -64,7 +64,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )
     

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/api/AnotherFakeApi.java

@@ -58,7 +58,7 @@ public interface AnotherFakeApi {
     @RequestMapping(
         method = RequestMethod.PATCH,
         value = "/another-fake/dummy",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "application/json"
     )
     

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/api/FakeApi.java

@@ -94,7 +94,7 @@ public interface FakeApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/fake/outer/boolean",
-        produces = "*/*",
+        produces = { "*/*" },
         consumes = "application/json"
     )
     
@@ -123,7 +123,7 @@ public interface FakeApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/fake/outer/composite",
-        produces = "*/*",
+        produces = { "*/*" },
         consumes = "application/json"
     )
     
@@ -152,7 +152,7 @@ public interface FakeApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/fake/outer/number",
-        produces = "*/*",
+        produces = { "*/*" },
         consumes = "application/json"
     )
     
@@ -181,7 +181,7 @@ public interface FakeApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/fake/outer/string",
-        produces = "*/*",
+        produces = { "*/*" },
         consumes = "application/json"
     )
     
@@ -263,7 +263,7 @@ public interface FakeApi {
     @RequestMapping(
         method = RequestMethod.PATCH,
         value = "/fake",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "application/json"
     )
     
@@ -542,7 +542,7 @@ public interface FakeApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/fake/response-with-example",
-        produces = "application/json"
+        produces = { "application/json" }
     )
     
     ResponseEntity<Integer> testWithResultExample(

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/api/FakeClassnameTags123Api.java

@@ -61,7 +61,7 @@ public interface FakeClassnameTags123Api {
     @RequestMapping(
         method = RequestMethod.PATCH,
         value = "/fake_classname_test",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "application/json"
     )
     

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/api/PetApi.java

@@ -132,7 +132,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByStatus",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<List<Pet>> findPetsByStatus(
@@ -170,7 +170,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/findByTags",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Set<Pet>> findPetsByTags(
@@ -207,7 +207,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/pet/{petId}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Pet> getPetById(
@@ -233,7 +233,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/fake/{petId}/response-object-different-names",
-        produces = "application/json"
+        produces = { "application/json" }
     )
     
     ResponseEntity<ResponseObjectWithDifferentFieldNames> responseObjectDifferentNames(
@@ -337,7 +337,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/pet/{petId}/uploadImage",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "multipart/form-data"
     )
     
@@ -374,7 +374,7 @@ public interface PetApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/fake/{petId}/uploadImageWithRequiredFile",
-        produces = "application/json",
+        produces = { "application/json" },
         consumes = "multipart/form-data"
     )
     

samples/openapi3/client/petstore/spring-cloud-oas3-fakeapi/src/main/java/org/openapitools/api/StoreApi.java

@@ -89,7 +89,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/inventory",
-        produces = "application/json"
+        produces = { "application/json" }
     )
     
     ResponseEntity<Map<String, Integer>> getInventory(
@@ -123,7 +123,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.GET,
         value = "/store/order/{order_id}",
-        produces = "application/json,application/xml"
+        produces = { "application/json", "application/xml" }
     )
     
     ResponseEntity<Order> getOrderById(
@@ -155,7 +155,7 @@ public interface StoreApi {
     @RequestMapping(
         method = RequestMethod.POST,
         value = "/store/order",
-        produces = "application/json,application/xml",
+        produces = { "application/json", "application/xml" },
         consumes = "application/json"
     )