Codegen parameter for query json serialization (#21718)

* Add endpoints with query parameters that require Json-serialization

* Add property for query json-serialization

* Update samples

* Adjust indentation for specification

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

@@ -467,6 +467,39 @@ paths:
       - query
       x-accepts:
       - text/plain
+  /query/style_jsonSerialization/object:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_jsonSerialization/object
+      parameters:
+      - content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Pet"
+        in: query
+        name: json_serialized_object_ref_string_query
+        required: false
+      - content:
+          application/json:
+            schema:
+              items:
+                $ref: "#/components/schemas/Pet"
+              type: array
+        in: query
+        name: json_serialized_object_array_ref_string_query
+        required: false
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
+      x-accepts:
+      - text/plain
   /body/application/octetstream/binary:
     post:
       description: Test body parameter(s)

samples/client/echo_api/java/feign-gson/src/main/java/org/openapitools/client/api/QueryApi.java

@@ -831,4 +831,89 @@ public interface QueryApi extends ApiClient.Api {
       return this;
     }
   }
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @return String
+   */
+  @RequestLine("GET /query/style_jsonSerialization/object?json_serialized_object_ref_string_query={jsonSerializedObjectRefStringQuery}&json_serialized_object_array_ref_string_query={jsonSerializedObjectArrayRefStringQuery}")
+  @Headers({
+    "Accept: text/plain",
+  })
+  String testQueryStyleJsonSerializationObject(@Param("jsonSerializedObjectRefStringQuery") @javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @Param("jsonSerializedObjectArrayRefStringQuery") @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery);
+
+  /**
+   * Test query parameter(s)
+   * Similar to <code>testQueryStyleJsonSerializationObject</code> but it also returns the http response headers .
+   * Test query parameter(s)
+   * @param jsonSerializedObjectRefStringQuery  (optional)
+   * @param jsonSerializedObjectArrayRefStringQuery  (optional)
+   * @return A ApiResponse that wraps the response boyd and the http headers.
+   */
+  @RequestLine("GET /query/style_jsonSerialization/object?json_serialized_object_ref_string_query={jsonSerializedObjectRefStringQuery}&json_serialized_object_array_ref_string_query={jsonSerializedObjectArrayRefStringQuery}")
+  @Headers({
+    "Accept: text/plain",
+  })
+  ApiResponse<String> testQueryStyleJsonSerializationObjectWithHttpInfo(@Param("jsonSerializedObjectRefStringQuery") @javax.annotation.Nullable Pet jsonSerializedObjectRefStringQuery, @Param("jsonSerializedObjectArrayRefStringQuery") @javax.annotation.Nullable List<Pet> jsonSerializedObjectArrayRefStringQuery);
+
+
+  /**
+   * Test query parameter(s)
+   * Test query parameter(s)
+   * Note, this is equivalent to the other <code>testQueryStyleJsonSerializationObject</code> method,
+   * but with the query parameters collected into a single Map parameter. This
+   * is convenient for services with optional query parameters, especially when
+   * used with the {@link TestQueryStyleJsonSerializationObjectQueryParams} class that allows for
+   * building up this map in a fluent style.
+   * @param queryParams Map of query parameters as name-value pairs
+   *   <p>The following elements may be specified in the query map:</p>
+   *   <ul>
+   *   <li>jsonSerializedObjectRefStringQuery -  (optional)</li>
+   *   <li>jsonSerializedObjectArrayRefStringQuery -  (optional)</li>
+   *   </ul>
+   * @return String
+   */
+  @RequestLine("GET /query/style_jsonSerialization/object?json_serialized_object_ref_string_query={jsonSerializedObjectRefStringQuery}&json_serialized_object_array_ref_string_query={jsonSerializedObjectArrayRefStringQuery}")
+  @Headers({
+  "Accept: text/plain",
+  })
+  String testQueryStyleJsonSerializationObject(@QueryMap(encoded=true) TestQueryStyleJsonSerializationObjectQueryParams queryParams);
+
+  /**
+  * Test query parameter(s)
+  * Test query parameter(s)
+  * Note, this is equivalent to the other <code>testQueryStyleJsonSerializationObject</code> that receives the query parameters as a map,
+  * but this one also exposes the Http response headers
+      * @param queryParams Map of query parameters as name-value pairs
+      *   <p>The following elements may be specified in the query map:</p>
+      *   <ul>
+          *   <li>jsonSerializedObjectRefStringQuery -  (optional)</li>
+          *   <li>jsonSerializedObjectArrayRefStringQuery -  (optional)</li>
+      *   </ul>
+          * @return String
+      */
+      @RequestLine("GET /query/style_jsonSerialization/object?json_serialized_object_ref_string_query={jsonSerializedObjectRefStringQuery}&json_serialized_object_array_ref_string_query={jsonSerializedObjectArrayRefStringQuery}")
+      @Headers({
+    "Accept: text/plain",
+      })
+   ApiResponse<String> testQueryStyleJsonSerializationObjectWithHttpInfo(@QueryMap(encoded=true) TestQueryStyleJsonSerializationObjectQueryParams queryParams);
+
+
+   /**
+   * A convenience class for generating query parameters for the
+   * <code>testQueryStyleJsonSerializationObject</code> method in a fluent style.
+   */
+  public static class TestQueryStyleJsonSerializationObjectQueryParams extends HashMap<String, Object> {
+    public TestQueryStyleJsonSerializationObjectQueryParams jsonSerializedObjectRefStringQuery(@javax.annotation.Nullable final Pet value) {
+      put("json_serialized_object_ref_string_query", EncodingUtils.encode(value));
+      return this;
+    }
+    public TestQueryStyleJsonSerializationObjectQueryParams jsonSerializedObjectArrayRefStringQuery(@javax.annotation.Nullable final List<Pet> value) {
+      put("json_serialized_object_array_ref_string_query", EncodingUtils.encodeCollection(value, "csv"));
+      return this;
+    }
+  }
 }