webclient explode query parameters support (#17441)

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

@@ -92,11 +92,10 @@ public class {{classname}} {
         final MultiValueMap<String, Object> formParams = new LinkedMultiValueMap<String, Object>();
         {{#hasQueryParams}}
 
-        {{#queryParams}}
+        {{#queryParams}}{{#isExplode}}{{#hasVars}}{{#vars}}queryParams.putAll(apiClient.parameterToMultiValueMap({{#collectionFormat}}ApiClient.CollectionFormat.valueOf("{{{.}}}".toUpperCase(Locale.ROOT)){{/collectionFormat}}{{^collectionFormat}}null{{/collectionFormat}}, "{{baseName}}", {{paramName}}.{{getter}}()));
-        queryParams.putAll(apiClient.parameterToMultiValueMap({{#collectionFormat}}ApiClient.CollectionFormat.valueOf("{{{.}}}".toUpperCase(Locale.ROOT)){{/collectionFormat}}{{^collectionFormat}}null{{/collectionFormat}}, "{{baseName}}", {{paramName}}));
+        {{/vars}}{{/hasVars}}{{^hasVars}}queryParams.putAll(apiClient.parameterToMultiValueMap({{#collectionFormat}}ApiClient.CollectionFormat.valueOf("{{{.}}}".toUpperCase(Locale.ROOT)){{/collectionFormat}}{{^collectionFormat}}null{{/collectionFormat}}, "{{baseName}}", {{paramName}}));
-        {{/queryParams}}
+        {{/hasVars}}{{/isExplode}}{{^isExplode}}queryParams.putAll(apiClient.parameterToMultiValueMap({{#collectionFormat}}ApiClient.CollectionFormat.valueOf("{{{.}}}".toUpperCase(Locale.ROOT)){{/collectionFormat}}{{^collectionFormat}}null{{/collectionFormat}}, "{{baseName}}", {{paramName}}));
-        {{/hasQueryParams}}
+        {{/isExplode}}{{/queryParams}}{{/hasQueryParams}}{{#hasHeaderParams}}
-        {{#hasHeaderParams}}
 
         {{#headerParams}}
         if ({{paramName}} != null)

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

@@ -2272,6 +2272,30 @@ public class JavaClientCodegenTest {
                                 + " objectParam.getSomeInteger()));");
     }
 
+    @Test
+    public void shouldProperlyExplodeWebClientQueryParameters() {
+        final Map<String, File> files = generateFromContract(
+                "src/test/resources/3_0/java/explode-query-parameter.yaml",
+                JavaClientCodegen.WEBCLIENT
+        );
+
+        JavaFileAssert.assertThat(files.get("DefaultApi.java"))
+                .printFileContent()
+                .assertMethod("searchRequestCreation")
+                .bodyContainsLines(
+                        "queryParams.putAll(apiClient.parameterToMultiValueMap(null, \"regular-param\","
+                                + " regularParam));")
+                .bodyContainsLines(
+                        "queryParams.putAll(apiClient.parameterToMultiValueMap(null, \"someString\","
+                                + " objectParam.getSomeString()));")
+                .bodyContainsLines(
+                        "queryParams.putAll(apiClient.parameterToMultiValueMap(null, \"someBoolean\","
+                                + " objectParam.getSomeBoolean()));")
+                .bodyContainsLines(
+                        "queryParams.putAll(apiClient.parameterToMultiValueMap(null, \"someInteger\","
+                                + " objectParam.getSomeInteger()));");
+    }
+
     private static Map<String, File> generateFromContract(final String pathToSpecification, final String library) {
         return generateFromContract(pathToSpecification, library, new HashMap<>());
     }

samples/client/petstore/java/webclient-jakarta/src/main/java/org/openapitools/client/api/FakeApi.java

@@ -213,6 +213,7 @@ public class FakeApi {
 
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "query_1", query1));
         
+
         if (header1 != null)
         headerParams.add("header_1", apiClient.parameterToString(header1));
         final String[] localVarAccepts = { };
@@ -1112,6 +1113,7 @@ public class FakeApi {
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "enum_query_double", enumQueryDouble));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("multi".toUpperCase(Locale.ROOT)), "enum_query_model_array", enumQueryModelArray));
         
+
         if (enumHeaderStringArray != null)
         headerParams.add("enum_header_string_array", apiClient.parameterToString(enumHeaderStringArray));
         if (enumHeaderString != null)
@@ -1235,6 +1237,7 @@ public class FakeApi {
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "string_group", stringGroup));
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "int64_group", int64Group));
         
+
         if (requiredBooleanGroup != null)
         headerParams.add("required_boolean_group", apiClient.parameterToString(requiredBooleanGroup));
         if (booleanGroup != null)

samples/client/petstore/java/webclient-jakarta/src/main/java/org/openapitools/client/api/PetApi.java

@@ -147,6 +147,7 @@ public class PetApi {
         final MultiValueMap<String, String> cookieParams = new LinkedMultiValueMap<String, String>();
         final MultiValueMap<String, Object> formParams = new LinkedMultiValueMap<String, Object>();
 
+
         if (apiKey != null)
         headerParams.add("api_key", apiClient.parameterToString(apiKey));
         final String[] localVarAccepts = { };

samples/client/petstore/java/webclient-swagger2/src/main/java/org/openapitools/client/api/FakeApi.java

@@ -213,6 +213,7 @@ public class FakeApi {
 
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "query_1", query1));
         
+
         if (header1 != null)
         headerParams.add("header_1", apiClient.parameterToString(header1));
         final String[] localVarAccepts = { };
@@ -1112,6 +1113,7 @@ public class FakeApi {
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "enum_query_double", enumQueryDouble));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("multi".toUpperCase(Locale.ROOT)), "enum_query_model_array", enumQueryModelArray));
         
+
         if (enumHeaderStringArray != null)
         headerParams.add("enum_header_string_array", apiClient.parameterToString(enumHeaderStringArray));
         if (enumHeaderString != null)
@@ -1235,6 +1237,7 @@ public class FakeApi {
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "string_group", stringGroup));
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "int64_group", int64Group));
         
+
         if (requiredBooleanGroup != null)
         headerParams.add("required_boolean_group", apiClient.parameterToString(requiredBooleanGroup));
         if (booleanGroup != null)

samples/client/petstore/java/webclient-swagger2/src/main/java/org/openapitools/client/api/PetApi.java

@@ -147,6 +147,7 @@ public class PetApi {
         final MultiValueMap<String, String> cookieParams = new LinkedMultiValueMap<String, String>();
         final MultiValueMap<String, Object> formParams = new LinkedMultiValueMap<String, Object>();
 
+
         if (apiKey != null)
         headerParams.add("api_key", apiClient.parameterToString(apiKey));
         final String[] localVarAccepts = { };

samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/FakeApi.java

@@ -213,6 +213,7 @@ public class FakeApi {
 
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "query_1", query1));
         
+
         if (header1 != null)
         headerParams.add("header_1", apiClient.parameterToString(header1));
         final String[] localVarAccepts = { };
@@ -1112,6 +1113,7 @@ public class FakeApi {
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "enum_query_double", enumQueryDouble));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("multi".toUpperCase(Locale.ROOT)), "enum_query_model_array", enumQueryModelArray));
         
+
         if (enumHeaderStringArray != null)
         headerParams.add("enum_header_string_array", apiClient.parameterToString(enumHeaderStringArray));
         if (enumHeaderString != null)
@@ -1235,6 +1237,7 @@ public class FakeApi {
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "string_group", stringGroup));
         queryParams.putAll(apiClient.parameterToMultiValueMap(null, "int64_group", int64Group));
         
+
         if (requiredBooleanGroup != null)
         headerParams.add("required_boolean_group", apiClient.parameterToString(requiredBooleanGroup));
         if (booleanGroup != null)

samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/PetApi.java

@@ -147,6 +147,7 @@ public class PetApi {
         final MultiValueMap<String, String> cookieParams = new LinkedMultiValueMap<String, String>();
         final MultiValueMap<String, Object> formParams = new LinkedMultiValueMap<String, Object>();
 
+
         if (apiKey != null)
         headerParams.add("api_key", apiClient.parameterToString(apiKey));
         final String[] localVarAccepts = { };