[spring] reactive: fix Content-Type (#16228)

* don't set content-type to client's value

* revert manual sample change

* better fix

* generate samples

* cover 3rd case

* add new test endpoint

modules/openapi-generator/src/main/java/org/openapitools/codegen/examples/ExampleGenerator.java

@@ -38,6 +38,7 @@ public class ExampleGenerator {
 
     private static final String EXAMPLE = "example";
     private static final String CONTENT_TYPE = "contentType";
+    private static final String GENERATED_CONTENT_TYPE = "generatedContentType";
     private static final String OUTPUT = "output";
     private static final String NONE = "none";
     private static final String URL = "url";
@@ -112,12 +113,14 @@ public class ExampleGenerator {
                     String example = Json.pretty(resolvePropertyToExample("", mediaType, property, processedModels));
                     if (example != null) {
                         kv.put(EXAMPLE, example);
+                        kv.put(GENERATED_CONTENT_TYPE, MIME_TYPE_JSON);
                         output.add(kv);
                     }
                 } else if (property != null && mediaType.startsWith(MIME_TYPE_XML)) {
                     String example = new XmlExampleGenerator(this.examples).toXml(property);
                     if (example != null) {
                         kv.put(EXAMPLE, example);
+                        kv.put(GENERATED_CONTENT_TYPE, MIME_TYPE_XML);
                         output.add(kv);
                     }
                 }
@@ -157,6 +160,7 @@ public class ExampleGenerator {
 
                         if (example != null) {
                             kv.put(EXAMPLE, example);
+                            kv.put(GENERATED_CONTENT_TYPE, MIME_TYPE_JSON);
                             output.add(kv);
                         }
                     }
@@ -165,6 +169,7 @@ public class ExampleGenerator {
                     String example = new XmlExampleGenerator(this.examples).toXml(schema, 0, Collections.emptySet());
                     if (example != null) {
                         kv.put(EXAMPLE, example);
+                        kv.put(GENERATED_CONTENT_TYPE, MIME_TYPE_XML);
                         output.add(kv);
                     }
                 } else {
@@ -201,6 +206,7 @@ public class ExampleGenerator {
                 kv.put(CONTENT_TYPE, mediaType);
                 if ((mediaType.startsWith(MIME_TYPE_JSON) || mediaType.contains("*/*"))) {
                     kv.put(EXAMPLE, Json.pretty(example));
+                    kv.put(GENERATED_CONTENT_TYPE, MIME_TYPE_JSON);
                     output.add(kv);
                 } else if (mediaType.startsWith(MIME_TYPE_XML)) {
                     // TODO

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

@@ -39,7 +39,7 @@ Mono<Void> result = Mono.empty();
         {{/-first}}
             if (mediaType.isCompatibleWith(MediaType.valueOf("{{{contentType}}}"))) {
                 String exampleString = {{>exampleString}};
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("{{{generatedContentType}}}"), exampleString);
                 break;
             }
         {{#-last}}

modules/openapi-generator/src/test/resources/3_0/spring/petstore-with-fake-endpoints-models-for-testing.yaml

@@ -1008,6 +1008,20 @@ paths:
       responses:
         "200":
           description: Success
+  /fake/response-with-example:
+    get:
+      tags:
+        - fake
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
   /fake/test-query-parameters:
     put:
       tags:

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

@@ -343,4 +343,20 @@ public interface FakeApi {
          @RequestParam(value = "context", required = true) List<String> context
     );
 
+
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @HttpExchange(
+        method = "GET",
+        value = "/fake/response-with-example",
+        accept = "application/json"
+    )
+    Mono<ResponseEntity<Integer>> testWithResultExample(
+        
+    );
+
 }

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

@@ -339,4 +339,20 @@ public interface FakeApi {
          @RequestParam(value = "context", required = true) List<String> context
     );
 
+
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @HttpExchange(
+        method = "GET",
+        value = "/fake/response-with-example",
+        accept = "application/json"
+    )
+    ResponseEntity<Integer> testWithResultExample(
+        
+    );
+
 }

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

@@ -480,4 +480,30 @@ public interface FakeApi {
         @NotNull @Parameter(name = "context", description = "", required = true, in = ParameterIn.QUERY) @Valid @RequestParam(value = "context", required = true) List<String> context
     );
 
+
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @Operation(
+        operationId = "testWithResultExample",
+        description = "This endpoint defines an example value for its response schema.",
+        tags = { "fake" },
+        responses = {
+            @ApiResponse(responseCode = "200", description = "Success", content = {
+                @Content(mediaType = "application/json", schema = @Schema(implementation = Integer.class))
+            })
+        }
+    )
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = "application/json"
+    )
+    ResponseEntity<Integer> testWithResultExample(
+        
+    );
+
 }

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/api/FakeApi.java

@@ -538,6 +538,34 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @Operation(
+        operationId = "testWithResultExample",
+        description = "This endpoint defines an example value for its response schema.",
+        tags = { "fake" },
+        responses = {
+            @ApiResponse(responseCode = "200", description = "Success", content = {
+                @Content(mediaType = "application/json", schema = @Schema(implementation = Integer.class))
+            })
+        }
+    )
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default ResponseEntity<Integer> testWithResultExample(
+        
+    ) {
+        return getDelegate().testWithResultExample();
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/openapi3/server/petstore/springboot-delegate/src/main/java/org/openapitools/api/FakeApiDelegate.java

@@ -318,6 +318,27 @@ public interface FakeApiDelegate {
 
     }
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     * @see FakeApi#testWithResultExample
+     */
+    default ResponseEntity<Integer> testWithResultExample() {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "42";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/openapi3/server/petstore/springboot-delegate/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeApi.java

@@ -584,6 +584,44 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @Operation(
+        operationId = "testWithResultExample",
+        description = "This endpoint defines an example value for its response schema.",
+        tags = { "fake" },
+        responses = {
+            @ApiResponse(responseCode = "200", description = "Success", content = {
+                @Content(mediaType = "application/json", schema = @Schema(implementation = Integer.class))
+            })
+        }
+    )
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default ResponseEntity<Integer> testWithResultExample(
+        
+    ) {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "42";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/openapi3/server/petstore/springboot-implicitHeaders/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters

samples/server/petstore/spring-boot-defaultInterface-unhandledException/src/main/java/org/openapitools/api/FakeApi.java

@@ -508,6 +508,32 @@ public interface FakeApi {
     ) throws Exception;
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @Operation(
+        operationId = "testWithResultExample",
+        description = "This endpoint defines an example value for its response schema.",
+        tags = { "fake" },
+        responses = {
+            @ApiResponse(responseCode = "200", description = "Success", content = {
+                @Content(mediaType = "application/json", schema = @Schema(implementation = Integer.class))
+            })
+        }
+    )
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    ResponseEntity<Integer> testWithResultExample(
+        
+    ) throws Exception;
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/java/org/openapitools/api/FakeApi.java

@@ -578,6 +578,44 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @ApiOperation(
+        tags = { "fake" },
+        value = "",
+        nickname = "testWithResultExample",
+        notes = "This endpoint defines an example value for its response schema.",
+        response = Integer.class
+    )
+    @ApiResponses({
+        @ApiResponse(code = 200, message = "Success", response = Integer.class)
+    })
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default ResponseEntity<Integer> testWithResultExample(
+        
+    ) {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "42";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-beanvalidation-no-nullable/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters

samples/server/petstore/springboot-beanvalidation/src/main/java/org/openapitools/api/FakeApi.java

@@ -578,6 +578,44 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @ApiOperation(
+        tags = { "fake" },
+        value = "",
+        nickname = "testWithResultExample",
+        notes = "This endpoint defines an example value for its response schema.",
+        response = Integer.class
+    )
+    @ApiResponses({
+        @ApiResponse(code = 200, message = "Success", response = Integer.class)
+    })
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default ResponseEntity<Integer> testWithResultExample(
+        
+    ) {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "42";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-beanvalidation/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters

samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeApi.java

@@ -532,6 +532,34 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @ApiOperation(
+        tags = { "fake" },
+        value = "",
+        nickname = "testWithResultExample",
+        notes = "This endpoint defines an example value for its response schema.",
+        response = Integer.class
+    )
+    @ApiResponses({
+        @ApiResponse(code = 200, message = "Success", response = Integer.class)
+    })
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default ResponseEntity<Integer> testWithResultExample(
+        
+    ) {
+        return getDelegate().testWithResultExample();
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-delegate-j8/src/main/java/org/openapitools/api/FakeApiDelegate.java

@@ -318,6 +318,27 @@ public interface FakeApiDelegate {
 
     }
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     * @see FakeApi#testWithResultExample
+     */
+    default ResponseEntity<Integer> testWithResultExample() {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "42";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-delegate-j8/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters

samples/server/petstore/springboot-delegate/src/main/java/org/openapitools/api/FakeApi.java

@@ -532,6 +532,34 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @ApiOperation(
+        tags = { "fake" },
+        value = "",
+        nickname = "testWithResultExample",
+        notes = "This endpoint defines an example value for its response schema.",
+        response = Integer.class
+    )
+    @ApiResponses({
+        @ApiResponse(code = 200, message = "Success", response = Integer.class)
+    })
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default ResponseEntity<Integer> testWithResultExample(
+        
+    ) {
+        return getDelegate().testWithResultExample();
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-delegate/src/main/java/org/openapitools/api/FakeApiDelegate.java

@@ -318,6 +318,27 @@ public interface FakeApiDelegate {
 
     }
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     * @see FakeApi#testWithResultExample
+     */
+    default ResponseEntity<Integer> testWithResultExample() {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "42";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-delegate/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters

samples/server/petstore/springboot-implicitHeaders/src/main/java/org/openapitools/api/FakeApi.java

@@ -578,6 +578,44 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @ApiOperation(
+        tags = { "fake" },
+        value = "",
+        nickname = "testWithResultExample",
+        notes = "This endpoint defines an example value for its response schema.",
+        response = Integer.class
+    )
+    @ApiResponses({
+        @ApiResponse(code = 200, message = "Success", response = Integer.class)
+    })
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default ResponseEntity<Integer> testWithResultExample(
+        
+    ) {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "42";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-implicitHeaders/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters

samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/AnotherFakeApiDelegate.java

@@ -45,7 +45,7 @@ public interface AnotherFakeApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "{ \"client\" : \"client\" }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
         }

samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeApi.java

@@ -552,6 +552,34 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @ApiOperation(
+        tags = { "fake" },
+        value = "",
+        nickname = "testWithResultExample",
+        notes = "This endpoint defines an example value for its response schema.",
+        response = Integer.class
+    )
+    @ApiResponses({
+        @ApiResponse(code = 200, message = "Success", response = Integer.class)
+    })
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default Mono<ResponseEntity<Integer>> testWithResultExample(
+        @ApiIgnore final ServerWebExchange exchange
+    ) {
+        return getDelegate().testWithResultExample(exchange);
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeApiDelegate.java

@@ -88,7 +88,7 @@ public interface FakeApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("*/*"))) {
                 String exampleString = "{ \"my_string\" : \"my_string\", \"my_number\" : 0.8008281904610115, \"my_boolean\" : true }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
         }
@@ -142,7 +142,7 @@ public interface FakeApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "{ \"UPPER_CASE_PROPERTY_SNAKE\" : \"UPPER_CASE_PROPERTY_SNAKE\", \"lower-case-property-dashes\" : \"lower-case-property-dashes\", \"property name with spaces\" : \"property name with spaces\", \"normalPropertyName\" : \"normalPropertyName\" }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
         }
@@ -198,7 +198,7 @@ public interface FakeApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "{ \"client\" : \"client\" }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
         }
@@ -362,6 +362,27 @@ public interface FakeApiDelegate {
 
     }
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     * @see FakeApi#testWithResultExample
+     */
+    default Mono<ResponseEntity<Integer>> testWithResultExample(ServerWebExchange exchange) {
+        Mono<Void> result = Mono.empty();
+        exchange.getResponse().setStatusCode(HttpStatus.NOT_IMPLEMENTED);
+        for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
+            if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                String exampleString = "42";
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
+                break;
+            }
+        }
+        return result.then(Mono.empty());
+
+    }
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 
@@ -381,7 +402,7 @@ public interface FakeApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
         }

samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/FakeClassnameTestApiDelegate.java

@@ -45,7 +45,7 @@ public interface FakeClassnameTestApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "{ \"client\" : \"client\" }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
         }

samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/PetApiDelegate.java

@@ -84,12 +84,12 @@ public interface PetApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "[ { \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }, { \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" } ]";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
                 String exampleString = "<Pet> <id>123456789</id> <Category> <id>123456789</id> <name>aeiou</name> </Category> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> <Tag> <id>123456789</id> <name>aeiou</name> </Tag> </tags> <status>aeiou</status> </Pet>";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/xml"), exampleString);
                 break;
             }
         }
@@ -115,12 +115,12 @@ public interface PetApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "[ { \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }, { \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" } ]";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
                 String exampleString = "<Pet> <id>123456789</id> <Category> <id>123456789</id> <name>aeiou</name> </Category> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> <Tag> <id>123456789</id> <name>aeiou</name> </Tag> </tags> <status>aeiou</status> </Pet>";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/xml"), exampleString);
                 break;
             }
         }
@@ -145,12 +145,12 @@ public interface PetApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "{ \"photoUrls\" : [ \"photoUrls\", \"photoUrls\" ], \"name\" : \"doggie\", \"id\" : 0, \"category\" : { \"name\" : \"default-name\", \"id\" : 6 }, \"tags\" : [ { \"name\" : \"name\", \"id\" : 1 }, { \"name\" : \"name\", \"id\" : 1 } ], \"status\" : \"available\" }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
                 String exampleString = "<Pet> <id>123456789</id> <Category> <id>123456789</id> <name>aeiou</name> </Category> <name>doggie</name> <photoUrls> <photoUrls>aeiou</photoUrls> </photoUrls> <tags> <Tag> <id>123456789</id> <name>aeiou</name> </Tag> </tags> <status>aeiou</status> </Pet>";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/xml"), exampleString);
                 break;
             }
         }
@@ -216,7 +216,7 @@ public interface PetApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "{ \"code\" : 0, \"type\" : \"type\", \"message\" : \"message\" }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
         }

samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/StoreApiDelegate.java

@@ -79,12 +79,12 @@ public interface StoreApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
                 String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/xml"), exampleString);
                 break;
             }
         }
@@ -108,12 +108,12 @@ public interface StoreApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "{ \"petId\" : 6, \"quantity\" : 1, \"id\" : 0, \"shipDate\" : \"2000-01-23T04:56:07.000+00:00\", \"complete\" : false, \"status\" : \"placed\" }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
                 String exampleString = "<Order> <id>123456789</id> <petId>123456789</petId> <quantity>123</quantity> <shipDate>2000-01-23T04:56:07.000Z</shipDate> <status>aeiou</status> <complete>true</complete> </Order>";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/xml"), exampleString);
                 break;
             }
         }

samples/server/petstore/springboot-reactive/src/main/java/org/openapitools/api/UserApiDelegate.java

@@ -113,12 +113,12 @@ public interface UserApiDelegate {
         for (MediaType mediaType : exchange.getRequest().getHeaders().getAccept()) {
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
                 String exampleString = "{ \"firstName\" : \"firstName\", \"lastName\" : \"lastName\", \"password\" : \"password\", \"userStatus\" : 6, \"phone\" : \"phone\", \"id\" : 0, \"email\" : \"email\", \"username\" : \"username\" }";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/json"), exampleString);
                 break;
             }
             if (mediaType.isCompatibleWith(MediaType.valueOf("application/xml"))) {
                 String exampleString = "<User> <id>123456789</id> <username>aeiou</username> <firstName>aeiou</firstName> <lastName>aeiou</lastName> <email>aeiou</email> <password>aeiou</password> <phone>aeiou</phone> <userStatus>123</userStatus> </User>";
-                result = ApiUtil.getExampleResponse(exchange, mediaType, exampleString);
+                result = ApiUtil.getExampleResponse(exchange, MediaType.valueOf("application/xml"), exampleString);
                 break;
             }
         }

samples/server/petstore/springboot-reactive/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters

samples/server/petstore/springboot-useoptional/src/main/java/org/openapitools/api/FakeApi.java

@@ -578,6 +578,44 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @ApiOperation(
+        tags = { "fake" },
+        value = "",
+        nickname = "testWithResultExample",
+        notes = "This endpoint defines an example value for its response schema.",
+        response = Integer.class
+    )
+    @ApiResponses({
+        @ApiResponse(code = 200, message = "Success", response = Integer.class)
+    })
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default ResponseEntity<Integer> testWithResultExample(
+        
+    ) {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "42";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-useoptional/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters

samples/server/petstore/springboot-virtualan/src/main/java/org/openapitools/virtualan/api/FakeApi.java

@@ -602,6 +602,45 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @ApiVirtual
+    @Operation(
+        operationId = "testWithResultExample",
+        description = "This endpoint defines an example value for its response schema.",
+        tags = { "fake" },
+        responses = {
+            @ApiResponse(responseCode = "200", description = "Success", content = {
+                @Content(mediaType = "application/json", schema = @Schema(implementation = Integer.class))
+            })
+        }
+    )
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default ResponseEntity<Integer> testWithResultExample(
+        
+    ) {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "42";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot-virtualan/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters

samples/server/petstore/springboot/src/main/java/org/openapitools/api/FakeApi.java

@@ -578,6 +578,44 @@ public interface FakeApi {
     }
 
 
+    /**
+     * GET /fake/response-with-example
+     * This endpoint defines an example value for its response schema.
+     *
+     * @return Success (status code 200)
+     */
+    @ApiOperation(
+        tags = { "fake" },
+        value = "",
+        nickname = "testWithResultExample",
+        notes = "This endpoint defines an example value for its response schema.",
+        response = Integer.class
+    )
+    @ApiResponses({
+        @ApiResponse(code = 200, message = "Success", response = Integer.class)
+    })
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/fake/response-with-example",
+        produces = { "application/json" }
+    )
+    default ResponseEntity<Integer> testWithResultExample(
+        
+    ) {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "42";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
+
     /**
      * POST /fake/{petId}/uploadImageWithRequiredFile : uploads an image (required)
      * 

samples/server/petstore/springboot/src/main/resources/openapi.yaml

@@ -1088,6 +1088,23 @@ paths:
       x-accepts: application/json
       x-tags:
       - tag: fake
+  /fake/response-with-example:
+    get:
+      description: This endpoint defines an example value for its response schema.
+      operationId: testWithResultExample
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                example: 42
+                type: integer
+          description: Success
+      tags:
+      - fake
+      x-accepts: application/json
+      x-tags:
+      - tag: fake
   /fake/test-query-parameters:
     put:
       description: To test the collection format in query parameters