add more tests such as empty response (#14587)

modules/openapi-generator/src/test/resources/3_0/echo_api.yaml

@@ -56,6 +56,67 @@ paths:
             text/plain:
               schema:
                 type: string
+  # form parameter tests
+  /form/integer/boolean/string:
+    post:
+      tags:
+        - form
+      summary: Test form parameter(s)
+      description: Test form parameter(s)
+      operationId: test/form/integer/boolean/string
+      requestBody:
+        content:
+          application/x-www-form-urlencoded:
+            schema:
+              type: object
+              properties:
+                integer_form:
+                  type: integer
+                boolean_form:
+                  type: boolean
+                string_form:
+                  type: string
+      responses:
+        '200':
+          description: Successful operation
+          content:
+            text/plain:
+              schema:
+                type: string
+  # header parameter tests
+  /header/integer/boolean/string:
+    get:
+      tags:
+        - header
+      summary: Test header parameter(s)
+      description: Test header parameter(s)
+      operationId: test/header/integer/boolean/string
+      parameters:
+      - in: header
+        name: integer_header
+        style: form #default
+        explode: true #default
+        schema:
+          type: integer
+      - in: header
+        name: boolean_header
+        style: form #default
+        explode: true #default
+        schema:
+          type: boolean
+      - in: header
+        name: string_header
+        style: form #default
+        explode: true #default
+        schema:
+          type: string
+      responses:
+        '200':
+          description: Successful operation
+          content:
+            text/plain:
+              schema:
+                type: string
   # query parameter tests
   /query/integer/boolean/string:
     get:
@@ -218,6 +279,22 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Pet'
+  /echo/body/Pet/response_string:
+    post:
+      tags:
+        - body
+      summary: Test empty response body
+      description: Test empty response body
+      operationId: test/echo/body/Pet/response_string
+      requestBody:
+        $ref: '#/components/requestBodies/Pet'
+      responses:
+        '200':
+          description: Successful operation
+          content:
+            text/plain:
+              schema:
+                type: string
 
 components:
   requestBodies:

samples/client/echo_api/java/apache-httpclient/.openapi-generator/FILES

@@ -11,6 +11,8 @@ docs/Category.md
 docs/DataQuery.md
 docs/DataQueryAllOf.md
 docs/DefaultValue.md
+docs/FormApi.md
+docs/HeaderApi.md
 docs/PathApi.md
 docs/Pet.md
 docs/Query.md
@@ -37,6 +39,8 @@ src/main/java/org/openapitools/client/ServerConfiguration.java
 src/main/java/org/openapitools/client/ServerVariable.java
 src/main/java/org/openapitools/client/StringUtil.java
 src/main/java/org/openapitools/client/api/BodyApi.java
+src/main/java/org/openapitools/client/api/FormApi.java
+src/main/java/org/openapitools/client/api/HeaderApi.java
 src/main/java/org/openapitools/client/api/PathApi.java
 src/main/java/org/openapitools/client/api/QueryApi.java
 src/main/java/org/openapitools/client/auth/ApiKeyAuth.java

samples/client/echo_api/java/apache-httpclient/README.md

@@ -107,6 +107,9 @@ All URIs are relative to *http://localhost:3000*
 Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
 *BodyApi* | [**testEchoBodyPet**](docs/BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
+*BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
+*FormApi* | [**testFormIntegerBooleanString**](docs/FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
+*HeaderApi* | [**testHeaderIntegerBooleanString**](docs/HeaderApi.md#testHeaderIntegerBooleanString) | **GET** /header/integer/boolean/string | Test header parameter(s)
 *PathApi* | [**testsPathStringPathStringIntegerPathInteger**](docs/PathApi.md#testsPathStringPathStringIntegerPathInteger) | **GET** /path/string/{path_string}/integer/{path_integer} | Test path parameter(s)
 *QueryApi* | [**testQueryIntegerBooleanString**](docs/QueryApi.md#testQueryIntegerBooleanString) | **GET** /query/integer/boolean/string | Test query parameter(s)
 *QueryApi* | [**testQueryStyleDeepObjectExplodeTrueObject**](docs/QueryApi.md#testQueryStyleDeepObjectExplodeTrueObject) | **GET** /query/style_deepObject/explode_true/object | Test query parameter(s)

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

@@ -41,6 +41,64 @@ paths:
       tags:
       - path
       x-accepts: text/plain
+  /form/integer/boolean/string:
+    post:
+      description: Test form parameter(s)
+      operationId: test/form/integer/boolean/string
+      requestBody:
+        content:
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: '#/components/schemas/test_form_integer_boolean_string_request'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test form parameter(s)
+      tags:
+      - form
+      x-content-type: application/x-www-form-urlencoded
+      x-accepts: text/plain
+  /header/integer/boolean/string:
+    get:
+      description: Test header parameter(s)
+      operationId: test/header/integer/boolean/string
+      parameters:
+      - explode: true
+        in: header
+        name: integer_header
+        required: false
+        schema:
+          type: integer
+        style: form
+      - explode: true
+        in: header
+        name: boolean_header
+        required: false
+        schema:
+          type: boolean
+        style: form
+      - explode: true
+        in: header
+        name: string_header
+        required: false
+        schema:
+          type: string
+        style: form
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test header parameter(s)
+      tags:
+      - header
+      x-accepts: text/plain
   /query/integer/boolean/string:
     get:
       description: Test query parameter(s)
@@ -211,6 +269,24 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: application/json
+  /echo/body/Pet/response_string:
+    post:
+      description: Test empty response body
+      operationId: test/echo/body/Pet/response_string
+      requestBody:
+        $ref: '#/components/requestBodies/Pet'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test empty response body
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
 components:
   requestBodies:
     Pet:
@@ -372,6 +448,15 @@ components:
       allOf:
       - $ref: '#/components/schemas/DataQuery_allOf'
       - $ref: '#/components/schemas/Query'
+    test_form_integer_boolean_string_request:
+      properties:
+        integer_form:
+          type: integer
+        boolean_form:
+          type: boolean
+        string_form:
+          type: string
+      type: object
     test_query_style_form_explode_true_array_string_query_object_parameter:
       properties:
         values:

samples/client/echo_api/java/apache-httpclient/docs/BodyApi.md

@@ -5,6 +5,7 @@ All URIs are relative to *http://localhost:3000*
 | Method | HTTP request | Description |
 |------------- | ------------- | -------------|
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
+| [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
 
 
 
@@ -73,3 +74,69 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+
+## testEchoBodyPetResponseString
+
+> String testEchoBodyPetResponseString(pet)
+
+Test empty response body
+
+Test empty response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        Pet pet = new Pet(); // Pet | Pet object that needs to be added to the store
+        try {
+            String result = apiInstance.testEchoBodyPetResponseString(pet);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyPetResponseString");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **pet** | [**Pet**](Pet.md)| Pet object that needs to be added to the store | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

samples/client/echo_api/java/apache-httpclient/docs/FormApi.md

@@ -0,0 +1,79 @@
+# FormApi
+
+All URIs are relative to *http://localhost:3000*
+
+| Method | HTTP request | Description |
+|------------- | ------------- | -------------|
+| [**testFormIntegerBooleanString**](FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s) |
+
+
+
+## testFormIntegerBooleanString
+
+> String testFormIntegerBooleanString(integerForm, booleanForm, stringForm)
+
+Test form parameter(s)
+
+Test form parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.FormApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        FormApi apiInstance = new FormApi(defaultClient);
+        Integer integerForm = 56; // Integer | 
+        Boolean booleanForm = true; // Boolean | 
+        String stringForm = "stringForm_example"; // String | 
+        try {
+            String result = apiInstance.testFormIntegerBooleanString(integerForm, booleanForm, stringForm);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling FormApi#testFormIntegerBooleanString");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **integerForm** | **Integer**|  | [optional] |
+| **booleanForm** | **Boolean**|  | [optional] |
+| **stringForm** | **String**|  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/x-www-form-urlencoded
+- **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

samples/client/echo_api/java/apache-httpclient/docs/HeaderApi.md

@@ -0,0 +1,79 @@
+# HeaderApi
+
+All URIs are relative to *http://localhost:3000*
+
+| Method | HTTP request | Description |
+|------------- | ------------- | -------------|
+| [**testHeaderIntegerBooleanString**](HeaderApi.md#testHeaderIntegerBooleanString) | **GET** /header/integer/boolean/string | Test header parameter(s) |
+
+
+
+## testHeaderIntegerBooleanString
+
+> String testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader)
+
+Test header parameter(s)
+
+Test header parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.HeaderApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        HeaderApi apiInstance = new HeaderApi(defaultClient);
+        Integer integerHeader = 56; // Integer | 
+        Boolean booleanHeader = true; // Boolean | 
+        String stringHeader = "stringHeader_example"; // String | 
+        try {
+            String result = apiInstance.testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling HeaderApi#testHeaderIntegerBooleanString");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **integerHeader** | **Integer**|  | [optional] |
+| **booleanHeader** | **Boolean**|  | [optional] |
+| **stringHeader** | **String**|  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/BodyApi.java

@@ -102,4 +102,57 @@ public class BodyApi {
         localVarReturnType
     );
   }
+  /**
+   * Test empty response body
+   * Test empty response body
+   * @param pet Pet object that needs to be added to the store (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testEchoBodyPetResponseString(Pet pet) throws ApiException {
+    Object localVarPostBody = pet;
+    
+    // create path and map variables
+    String localVarPath = "/echo/body/Pet/response_string";
+
+    StringJoiner localVarQueryStringJoiner = new StringJoiner("&");
+    String localVarQueryParameterBaseName;
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "text/plain"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    TypeReference<String> localVarReturnType = new TypeReference<String>() {};
+    return apiClient.invokeAPI(
+        localVarPath,
+        "POST",
+        localVarQueryParams,
+        localVarCollectionQueryParams,
+        localVarQueryStringJoiner.toString(),
+        localVarPostBody,
+        localVarHeaderParams,
+        localVarCookieParams,
+        localVarFormParams,
+        localVarAccept,
+        localVarContentType,
+        localVarAuthNames,
+        localVarReturnType
+    );
+  }
 }

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/FormApi.java

@@ -0,0 +1,112 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+package org.openapitools.client.api;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.model.*;
+import org.openapitools.client.Pair;
+
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.StringJoiner;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class FormApi {
+  private ApiClient apiClient;
+
+  public FormApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public FormApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Test form parameter(s)
+   * Test form parameter(s)
+   * @param integerForm  (optional)
+   * @param booleanForm  (optional)
+   * @param stringForm  (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testFormIntegerBooleanString(Integer integerForm, Boolean booleanForm, String stringForm) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/form/integer/boolean/string";
+
+    StringJoiner localVarQueryStringJoiner = new StringJoiner("&");
+    String localVarQueryParameterBaseName;
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+    
+    
+    if (integerForm != null)
+      localVarFormParams.put("integer_form", integerForm);
+if (booleanForm != null)
+      localVarFormParams.put("boolean_form", booleanForm);
+if (stringForm != null)
+      localVarFormParams.put("string_form", stringForm);
+
+    final String[] localVarAccepts = {
+      "text/plain"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/x-www-form-urlencoded"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    TypeReference<String> localVarReturnType = new TypeReference<String>() {};
+    return apiClient.invokeAPI(
+        localVarPath,
+        "POST",
+        localVarQueryParams,
+        localVarCollectionQueryParams,
+        localVarQueryStringJoiner.toString(),
+        localVarPostBody,
+        localVarHeaderParams,
+        localVarCookieParams,
+        localVarFormParams,
+        localVarAccept,
+        localVarContentType,
+        localVarAuthNames,
+        localVarReturnType
+    );
+  }
+}

samples/client/echo_api/java/apache-httpclient/src/main/java/org/openapitools/client/api/HeaderApi.java

@@ -0,0 +1,112 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+package org.openapitools.client.api;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.model.*;
+import org.openapitools.client.Pair;
+
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.StringJoiner;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class HeaderApi {
+  private ApiClient apiClient;
+
+  public HeaderApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public HeaderApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Test header parameter(s)
+   * Test header parameter(s)
+   * @param integerHeader  (optional)
+   * @param booleanHeader  (optional)
+   * @param stringHeader  (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testHeaderIntegerBooleanString(Integer integerHeader, Boolean booleanHeader, String stringHeader) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/header/integer/boolean/string";
+
+    StringJoiner localVarQueryStringJoiner = new StringJoiner("&");
+    String localVarQueryParameterBaseName;
+    List<Pair> localVarQueryParams = new ArrayList<Pair>();
+    List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+    Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+    Map<String, String> localVarCookieParams = new HashMap<String, String>();
+    Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+    if (integerHeader != null)
+      localVarHeaderParams.put("integer_header", apiClient.parameterToString(integerHeader));
+if (booleanHeader != null)
+      localVarHeaderParams.put("boolean_header", apiClient.parameterToString(booleanHeader));
+if (stringHeader != null)
+      localVarHeaderParams.put("string_header", apiClient.parameterToString(stringHeader));
+
+    
+    
+    final String[] localVarAccepts = {
+      "text/plain"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    TypeReference<String> localVarReturnType = new TypeReference<String>() {};
+    return apiClient.invokeAPI(
+        localVarPath,
+        "GET",
+        localVarQueryParams,
+        localVarCollectionQueryParams,
+        localVarQueryStringJoiner.toString(),
+        localVarPostBody,
+        localVarHeaderParams,
+        localVarCookieParams,
+        localVarFormParams,
+        localVarAccept,
+        localVarContentType,
+        localVarAuthNames,
+        localVarReturnType
+    );
+  }
+}

samples/client/echo_api/java/apache-httpclient/src/test/java/org/openapitools/client/CustomTest.java

@@ -55,6 +55,20 @@ public class CustomTest {
         Assert.assertNull(p2);
     }
 
+    /**
+     * Test body parameter(s)
+     * <p>
+     * Test body parameter(s)
+     *
+     * @throws ApiException if the Api call fails
+     */
+    @Test
+    public void testEchoBodyPetResponseString() throws ApiException {
+        // response is empty body
+        String p2 = bodyApi.testEchoBodyPetResponseString(null);
+        Assert.assertNull(p2);
+    }
+
     /**
      * Test query parameter(s)
      * <p>

samples/client/echo_api/java/apache-httpclient/src/test/java/org/openapitools/client/api/FormApiTest.java

@@ -0,0 +1,53 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.junit.Test;
+import org.junit.Ignore;
+import org.junit.Assert;
+
+import java.time.LocalDate;
+import java.time.OffsetDateTime;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for FormApi
+ */
+@Ignore
+public class FormApiTest {
+
+    private final FormApi api = new FormApi();
+
+    /**
+     * Test form parameter(s)
+     *
+     * Test form parameter(s)
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testFormIntegerBooleanStringTest() throws ApiException {
+        Integer integerForm = null;
+        Boolean booleanForm = null;
+        String stringForm = null;
+        String response = api.testFormIntegerBooleanString(integerForm, booleanForm, stringForm);
+
+        // TODO: test validations
+    }
+}

samples/client/echo_api/java/apache-httpclient/src/test/java/org/openapitools/client/api/HeaderApiTest.java

@@ -0,0 +1,53 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.junit.Test;
+import org.junit.Ignore;
+import org.junit.Assert;
+
+import java.time.LocalDate;
+import java.time.OffsetDateTime;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for HeaderApi
+ */
+@Ignore
+public class HeaderApiTest {
+
+    private final HeaderApi api = new HeaderApi();
+
+    /**
+     * Test header parameter(s)
+     *
+     * Test header parameter(s)
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testHeaderIntegerBooleanStringTest() throws ApiException {
+        Integer integerHeader = null;
+        Boolean booleanHeader = null;
+        String stringHeader = null;
+        String response = api.testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader);
+
+        // TODO: test validations
+    }
+}

samples/client/echo_api/java/feign-gson/.openapi-generator/FILES

@@ -20,6 +20,8 @@ src/main/java/org/openapitools/client/ServerConfiguration.java
 src/main/java/org/openapitools/client/ServerVariable.java
 src/main/java/org/openapitools/client/StringUtil.java
 src/main/java/org/openapitools/client/api/BodyApi.java
+src/main/java/org/openapitools/client/api/FormApi.java
+src/main/java/org/openapitools/client/api/HeaderApi.java
 src/main/java/org/openapitools/client/api/PathApi.java
 src/main/java/org/openapitools/client/api/QueryApi.java
 src/main/java/org/openapitools/client/auth/ApiKeyAuth.java

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

@@ -41,6 +41,64 @@ paths:
       tags:
       - path
       x-accepts: text/plain
+  /form/integer/boolean/string:
+    post:
+      description: Test form parameter(s)
+      operationId: test/form/integer/boolean/string
+      requestBody:
+        content:
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: '#/components/schemas/test_form_integer_boolean_string_request'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test form parameter(s)
+      tags:
+      - form
+      x-content-type: application/x-www-form-urlencoded
+      x-accepts: text/plain
+  /header/integer/boolean/string:
+    get:
+      description: Test header parameter(s)
+      operationId: test/header/integer/boolean/string
+      parameters:
+      - explode: true
+        in: header
+        name: integer_header
+        required: false
+        schema:
+          type: integer
+        style: form
+      - explode: true
+        in: header
+        name: boolean_header
+        required: false
+        schema:
+          type: boolean
+        style: form
+      - explode: true
+        in: header
+        name: string_header
+        required: false
+        schema:
+          type: string
+        style: form
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test header parameter(s)
+      tags:
+      - header
+      x-accepts: text/plain
   /query/integer/boolean/string:
     get:
       description: Test query parameter(s)
@@ -211,6 +269,24 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: application/json
+  /echo/body/Pet/response_string:
+    post:
+      description: Test empty response body
+      operationId: test/echo/body/Pet/response_string
+      requestBody:
+        $ref: '#/components/requestBodies/Pet'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test empty response body
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
 components:
   requestBodies:
     Pet:
@@ -372,6 +448,15 @@ components:
       allOf:
       - $ref: '#/components/schemas/DataQuery_allOf'
       - $ref: '#/components/schemas/Query'
+    test_form_integer_boolean_string_request:
+      properties:
+        integer_form:
+          type: integer
+        boolean_form:
+          type: boolean
+        string_form:
+          type: string
+      type: object
     test_query_style_form_explode_true_array_string_query_object_parameter:
       properties:
         values:

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

@@ -44,4 +44,33 @@ public interface BodyApi extends ApiClient.Api {
   ApiResponse<Pet> testEchoBodyPetWithHttpInfo(Pet pet);
 
 
+
+  /**
+   * Test empty response body
+   * Test empty response body
+   * @param pet Pet object that needs to be added to the store (optional)
+   * @return String
+   */
+  @RequestLine("POST /echo/body/Pet/response_string")
+  @Headers({
+    "Content-Type: application/json",
+    "Accept: text/plain",
+  })
+  String testEchoBodyPetResponseString(Pet pet);
+
+  /**
+   * Test empty response body
+   * Similar to <code>testEchoBodyPetResponseString</code> but it also returns the http response headers .
+   * Test empty response body
+   * @param pet Pet object that needs to be added to the store (optional)
+   * @return A ApiResponse that wraps the response boyd and the http headers.
+   */
+  @RequestLine("POST /echo/body/Pet/response_string")
+  @Headers({
+    "Content-Type: application/json",
+    "Accept: text/plain",
+  })
+  ApiResponse<String> testEchoBodyPetResponseStringWithHttpInfo(Pet pet);
+
+
 }

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

@@ -0,0 +1,50 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.EncodingUtils;
+import org.openapitools.client.model.ApiResponse;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import feign.*;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public interface FormApi extends ApiClient.Api {
+
+
+  /**
+   * Test form parameter(s)
+   * Test form parameter(s)
+   * @param integerForm  (optional)
+   * @param booleanForm  (optional)
+   * @param stringForm  (optional)
+   * @return String
+   */
+  @RequestLine("POST /form/integer/boolean/string")
+  @Headers({
+    "Content-Type: application/x-www-form-urlencoded",
+    "Accept: text/plain",
+  })
+  String testFormIntegerBooleanString(@Param("integer_form") Integer integerForm, @Param("boolean_form") Boolean booleanForm, @Param("string_form") String stringForm);
+
+  /**
+   * Test form parameter(s)
+   * Similar to <code>testFormIntegerBooleanString</code> but it also returns the http response headers .
+   * Test form parameter(s)
+   * @param integerForm  (optional)
+   * @param booleanForm  (optional)
+   * @param stringForm  (optional)
+   * @return A ApiResponse that wraps the response boyd and the http headers.
+   */
+  @RequestLine("POST /form/integer/boolean/string")
+  @Headers({
+    "Content-Type: application/x-www-form-urlencoded",
+    "Accept: text/plain",
+  })
+  ApiResponse<String> testFormIntegerBooleanStringWithHttpInfo(@Param("integer_form") Integer integerForm, @Param("boolean_form") Boolean booleanForm, @Param("string_form") String stringForm);
+
+
+}

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

@@ -0,0 +1,58 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.EncodingUtils;
+import org.openapitools.client.model.ApiResponse;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import feign.*;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public interface HeaderApi extends ApiClient.Api {
+
+
+  /**
+   * Test header parameter(s)
+   * Test header parameter(s)
+   * @param integerHeader  (optional)
+   * @param booleanHeader  (optional)
+   * @param stringHeader  (optional)
+   * @return String
+   */
+  @RequestLine("GET /header/integer/boolean/string")
+  @Headers({
+    "Accept: text/plain",
+    "integer_header: {integerHeader}",
+    
+    "boolean_header: {booleanHeader}",
+    
+    "string_header: {stringHeader}"
+  })
+  String testHeaderIntegerBooleanString(@Param("integerHeader") Integer integerHeader, @Param("booleanHeader") Boolean booleanHeader, @Param("stringHeader") String stringHeader);
+
+  /**
+   * Test header parameter(s)
+   * Similar to <code>testHeaderIntegerBooleanString</code> but it also returns the http response headers .
+   * Test header parameter(s)
+   * @param integerHeader  (optional)
+   * @param booleanHeader  (optional)
+   * @param stringHeader  (optional)
+   * @return A ApiResponse that wraps the response boyd and the http headers.
+   */
+  @RequestLine("GET /header/integer/boolean/string")
+  @Headers({
+    "Accept: text/plain",
+    "integer_header: {integerHeader}",
+    
+    "boolean_header: {booleanHeader}",
+    
+    "string_header: {stringHeader}"
+  })
+  ApiResponse<String> testHeaderIntegerBooleanStringWithHttpInfo(@Param("integerHeader") Integer integerHeader, @Param("booleanHeader") Boolean booleanHeader, @Param("stringHeader") String stringHeader);
+
+
+}

samples/client/echo_api/java/feign-gson/src/test/java/org/openapitools/client/api/FormApiTest.java

@@ -0,0 +1,43 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiClient;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.BeforeEach;
+
+import java.time.LocalDate;
+import java.time.OffsetDateTime;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for FormApi
+ */
+class FormApiTest {
+
+    private FormApi api;
+
+    @BeforeEach
+    public void setup() {
+        api = new ApiClient().buildClient(FormApi.class);
+    }
+
+    
+    /**
+     * Test form parameter(s)
+     *
+     * Test form parameter(s)
+     */
+    @Test
+    void testFormIntegerBooleanStringTest() {
+        Integer integerForm = null;
+        Boolean booleanForm = null;
+        String stringForm = null;
+        // String response = api.testFormIntegerBooleanString(integerForm, booleanForm, stringForm);
+
+        // TODO: test validations
+    }
+
+    
+}

samples/client/echo_api/java/feign-gson/src/test/java/org/openapitools/client/api/HeaderApiTest.java

@@ -0,0 +1,43 @@
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiClient;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.BeforeEach;
+
+import java.time.LocalDate;
+import java.time.OffsetDateTime;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for HeaderApi
+ */
+class HeaderApiTest {
+
+    private HeaderApi api;
+
+    @BeforeEach
+    public void setup() {
+        api = new ApiClient().buildClient(HeaderApi.class);
+    }
+
+    
+    /**
+     * Test header parameter(s)
+     *
+     * Test header parameter(s)
+     */
+    @Test
+    void testHeaderIntegerBooleanStringTest() {
+        Integer integerHeader = null;
+        Boolean booleanHeader = null;
+        String stringHeader = null;
+        // String response = api.testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader);
+
+        // TODO: test validations
+    }
+
+    
+}

samples/client/echo_api/java/native/.openapi-generator/FILES

@@ -11,6 +11,8 @@ docs/Category.md
 docs/DataQuery.md
 docs/DataQueryAllOf.md
 docs/DefaultValue.md
+docs/FormApi.md
+docs/HeaderApi.md
 docs/PathApi.md
 docs/Pet.md
 docs/Query.md
@@ -37,6 +39,8 @@ src/main/java/org/openapitools/client/RFC3339DateFormat.java
 src/main/java/org/openapitools/client/ServerConfiguration.java
 src/main/java/org/openapitools/client/ServerVariable.java
 src/main/java/org/openapitools/client/api/BodyApi.java
+src/main/java/org/openapitools/client/api/FormApi.java
+src/main/java/org/openapitools/client/api/HeaderApi.java
 src/main/java/org/openapitools/client/api/PathApi.java
 src/main/java/org/openapitools/client/api/QueryApi.java
 src/main/java/org/openapitools/client/model/AbstractOpenApiSchema.java

samples/client/echo_api/java/native/README.md

@@ -107,6 +107,12 @@ Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
 *BodyApi* | [**testEchoBodyPet**](docs/BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
 *BodyApi* | [**testEchoBodyPetWithHttpInfo**](docs/BodyApi.md#testEchoBodyPetWithHttpInfo) | **POST** /echo/body/Pet | Test body parameter(s)
+*BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
+*BodyApi* | [**testEchoBodyPetResponseStringWithHttpInfo**](docs/BodyApi.md#testEchoBodyPetResponseStringWithHttpInfo) | **POST** /echo/body/Pet/response_string | Test empty response body
+*FormApi* | [**testFormIntegerBooleanString**](docs/FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
+*FormApi* | [**testFormIntegerBooleanStringWithHttpInfo**](docs/FormApi.md#testFormIntegerBooleanStringWithHttpInfo) | **POST** /form/integer/boolean/string | Test form parameter(s)
+*HeaderApi* | [**testHeaderIntegerBooleanString**](docs/HeaderApi.md#testHeaderIntegerBooleanString) | **GET** /header/integer/boolean/string | Test header parameter(s)
+*HeaderApi* | [**testHeaderIntegerBooleanStringWithHttpInfo**](docs/HeaderApi.md#testHeaderIntegerBooleanStringWithHttpInfo) | **GET** /header/integer/boolean/string | Test header parameter(s)
 *PathApi* | [**testsPathStringPathStringIntegerPathInteger**](docs/PathApi.md#testsPathStringPathStringIntegerPathInteger) | **GET** /path/string/{path_string}/integer/{path_integer} | Test path parameter(s)
 *PathApi* | [**testsPathStringPathStringIntegerPathIntegerWithHttpInfo**](docs/PathApi.md#testsPathStringPathStringIntegerPathIntegerWithHttpInfo) | **GET** /path/string/{path_string}/integer/{path_integer} | Test path parameter(s)
 *QueryApi* | [**testQueryIntegerBooleanString**](docs/QueryApi.md#testQueryIntegerBooleanString) | **GET** /query/integer/boolean/string | Test query parameter(s)

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

@@ -41,6 +41,64 @@ paths:
       tags:
       - path
       x-accepts: text/plain
+  /form/integer/boolean/string:
+    post:
+      description: Test form parameter(s)
+      operationId: test/form/integer/boolean/string
+      requestBody:
+        content:
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: '#/components/schemas/test_form_integer_boolean_string_request'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test form parameter(s)
+      tags:
+      - form
+      x-content-type: application/x-www-form-urlencoded
+      x-accepts: text/plain
+  /header/integer/boolean/string:
+    get:
+      description: Test header parameter(s)
+      operationId: test/header/integer/boolean/string
+      parameters:
+      - explode: true
+        in: header
+        name: integer_header
+        required: false
+        schema:
+          type: integer
+        style: form
+      - explode: true
+        in: header
+        name: boolean_header
+        required: false
+        schema:
+          type: boolean
+        style: form
+      - explode: true
+        in: header
+        name: string_header
+        required: false
+        schema:
+          type: string
+        style: form
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test header parameter(s)
+      tags:
+      - header
+      x-accepts: text/plain
   /query/integer/boolean/string:
     get:
       description: Test query parameter(s)
@@ -211,6 +269,24 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: application/json
+  /echo/body/Pet/response_string:
+    post:
+      description: Test empty response body
+      operationId: test/echo/body/Pet/response_string
+      requestBody:
+        $ref: '#/components/requestBodies/Pet'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test empty response body
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
 components:
   requestBodies:
     Pet:
@@ -372,6 +448,15 @@ components:
       allOf:
       - $ref: '#/components/schemas/DataQuery_allOf'
       - $ref: '#/components/schemas/Query'
+    test_form_integer_boolean_string_request:
+      properties:
+        integer_form:
+          type: integer
+        boolean_form:
+          type: boolean
+        string_form:
+          type: string
+      type: object
     test_query_style_form_explode_true_array_string_query_object_parameter:
       properties:
         values:

samples/client/echo_api/java/native/docs/BodyApi.md

@@ -6,6 +6,8 @@ All URIs are relative to *http://localhost:3000*
 |------------- | ------------- | -------------|
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
 | [**testEchoBodyPetWithHttpInfo**](BodyApi.md#testEchoBodyPetWithHttpInfo) | **POST** /echo/body/Pet | Test body parameter(s) |
+| [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
+| [**testEchoBodyPetResponseStringWithHttpInfo**](BodyApi.md#testEchoBodyPetResponseStringWithHttpInfo) | **POST** /echo/body/Pet/response_string | Test empty response body |
 
 
 
@@ -142,3 +144,137 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+
+## testEchoBodyPetResponseString
+
+> String testEchoBodyPetResponseString(pet)
+
+Test empty response body
+
+Test empty response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        Pet pet = new Pet(); // Pet | Pet object that needs to be added to the store
+        try {
+            String result = apiInstance.testEchoBodyPetResponseString(pet);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyPetResponseString");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **pet** | [**Pet**](Pet.md)| Pet object that needs to be added to the store | [optional] |
+
+### Return type
+
+**String**
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+## testEchoBodyPetResponseStringWithHttpInfo
+
+> ApiResponse<String> testEchoBodyPetResponseString testEchoBodyPetResponseStringWithHttpInfo(pet)
+
+Test empty response body
+
+Test empty response body
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        BodyApi apiInstance = new BodyApi(defaultClient);
+        Pet pet = new Pet(); // Pet | Pet object that needs to be added to the store
+        try {
+            ApiResponse<String> response = apiInstance.testEchoBodyPetResponseStringWithHttpInfo(pet);
+            System.out.println("Status code: " + response.getStatusCode());
+            System.out.println("Response headers: " + response.getHeaders());
+            System.out.println("Response body: " + response.getData());
+        } catch (ApiException e) {
+            System.err.println("Exception when calling BodyApi#testEchoBodyPetResponseString");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            System.err.println("Reason: " + e.getResponseBody());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **pet** | [**Pet**](Pet.md)| Pet object that needs to be added to the store | [optional] |
+
+### Return type
+
+ApiResponse<**String**>
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/json
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

samples/client/echo_api/java/native/docs/FormApi.md

@@ -0,0 +1,152 @@
+# FormApi
+
+All URIs are relative to *http://localhost:3000*
+
+| Method | HTTP request | Description |
+|------------- | ------------- | -------------|
+| [**testFormIntegerBooleanString**](FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s) |
+| [**testFormIntegerBooleanStringWithHttpInfo**](FormApi.md#testFormIntegerBooleanStringWithHttpInfo) | **POST** /form/integer/boolean/string | Test form parameter(s) |
+
+
+
+## testFormIntegerBooleanString
+
+> String testFormIntegerBooleanString(integerForm, booleanForm, stringForm)
+
+Test form parameter(s)
+
+Test form parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.FormApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        FormApi apiInstance = new FormApi(defaultClient);
+        Integer integerForm = 56; // Integer | 
+        Boolean booleanForm = true; // Boolean | 
+        String stringForm = "stringForm_example"; // String | 
+        try {
+            String result = apiInstance.testFormIntegerBooleanString(integerForm, booleanForm, stringForm);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling FormApi#testFormIntegerBooleanString");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **integerForm** | **Integer**|  | [optional] |
+| **booleanForm** | **Boolean**|  | [optional] |
+| **stringForm** | **String**|  | [optional] |
+
+### Return type
+
+**String**
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/x-www-form-urlencoded
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+## testFormIntegerBooleanStringWithHttpInfo
+
+> ApiResponse<String> testFormIntegerBooleanString testFormIntegerBooleanStringWithHttpInfo(integerForm, booleanForm, stringForm)
+
+Test form parameter(s)
+
+Test form parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.FormApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        FormApi apiInstance = new FormApi(defaultClient);
+        Integer integerForm = 56; // Integer | 
+        Boolean booleanForm = true; // Boolean | 
+        String stringForm = "stringForm_example"; // String | 
+        try {
+            ApiResponse<String> response = apiInstance.testFormIntegerBooleanStringWithHttpInfo(integerForm, booleanForm, stringForm);
+            System.out.println("Status code: " + response.getStatusCode());
+            System.out.println("Response headers: " + response.getHeaders());
+            System.out.println("Response body: " + response.getData());
+        } catch (ApiException e) {
+            System.err.println("Exception when calling FormApi#testFormIntegerBooleanString");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            System.err.println("Reason: " + e.getResponseBody());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **integerForm** | **Integer**|  | [optional] |
+| **booleanForm** | **Boolean**|  | [optional] |
+| **stringForm** | **String**|  | [optional] |
+
+### Return type
+
+ApiResponse<**String**>
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: application/x-www-form-urlencoded
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

samples/client/echo_api/java/native/docs/HeaderApi.md

@@ -0,0 +1,152 @@
+# HeaderApi
+
+All URIs are relative to *http://localhost:3000*
+
+| Method | HTTP request | Description |
+|------------- | ------------- | -------------|
+| [**testHeaderIntegerBooleanString**](HeaderApi.md#testHeaderIntegerBooleanString) | **GET** /header/integer/boolean/string | Test header parameter(s) |
+| [**testHeaderIntegerBooleanStringWithHttpInfo**](HeaderApi.md#testHeaderIntegerBooleanStringWithHttpInfo) | **GET** /header/integer/boolean/string | Test header parameter(s) |
+
+
+
+## testHeaderIntegerBooleanString
+
+> String testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader)
+
+Test header parameter(s)
+
+Test header parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.HeaderApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        HeaderApi apiInstance = new HeaderApi(defaultClient);
+        Integer integerHeader = 56; // Integer | 
+        Boolean booleanHeader = true; // Boolean | 
+        String stringHeader = "stringHeader_example"; // String | 
+        try {
+            String result = apiInstance.testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader);
+            System.out.println(result);
+        } catch (ApiException e) {
+            System.err.println("Exception when calling HeaderApi#testHeaderIntegerBooleanString");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Reason: " + e.getResponseBody());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **integerHeader** | **Integer**|  | [optional] |
+| **booleanHeader** | **Boolean**|  | [optional] |
+| **stringHeader** | **String**|  | [optional] |
+
+### Return type
+
+**String**
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+
+## testHeaderIntegerBooleanStringWithHttpInfo
+
+> ApiResponse<String> testHeaderIntegerBooleanString testHeaderIntegerBooleanStringWithHttpInfo(integerHeader, booleanHeader, stringHeader)
+
+Test header parameter(s)
+
+Test header parameter(s)
+
+### Example
+
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.HeaderApi;
+
+public class Example {
+    public static void main(String[] args) {
+        ApiClient defaultClient = Configuration.getDefaultApiClient();
+        defaultClient.setBasePath("http://localhost:3000");
+
+        HeaderApi apiInstance = new HeaderApi(defaultClient);
+        Integer integerHeader = 56; // Integer | 
+        Boolean booleanHeader = true; // Boolean | 
+        String stringHeader = "stringHeader_example"; // String | 
+        try {
+            ApiResponse<String> response = apiInstance.testHeaderIntegerBooleanStringWithHttpInfo(integerHeader, booleanHeader, stringHeader);
+            System.out.println("Status code: " + response.getStatusCode());
+            System.out.println("Response headers: " + response.getHeaders());
+            System.out.println("Response body: " + response.getData());
+        } catch (ApiException e) {
+            System.err.println("Exception when calling HeaderApi#testHeaderIntegerBooleanString");
+            System.err.println("Status code: " + e.getCode());
+            System.err.println("Response headers: " + e.getResponseHeaders());
+            System.err.println("Reason: " + e.getResponseBody());
+            e.printStackTrace();
+        }
+    }
+}
+```
+
+### Parameters
+
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **integerHeader** | **Integer**|  | [optional] |
+| **booleanHeader** | **Boolean**|  | [optional] |
+| **stringHeader** | **String**|  | [optional] |
+
+### Return type
+
+ApiResponse<**String**>
+
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/BodyApi.java

@@ -133,6 +133,87 @@ public class BodyApi {
     localVarRequestBuilder.header("Content-Type", "application/json");
     localVarRequestBuilder.header("Accept", "application/json");
 
+    try {
+      byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(pet);
+      localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
+  /**
+   * Test empty response body
+   * Test empty response body
+   * @param pet Pet object that needs to be added to the store (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testEchoBodyPetResponseString(Pet pet) throws ApiException {
+    ApiResponse<String> localVarResponse = testEchoBodyPetResponseStringWithHttpInfo(pet);
+    return localVarResponse.getData();
+  }
+
+  /**
+   * Test empty response body
+   * Test empty response body
+   * @param pet Pet object that needs to be added to the store (optional)
+   * @return ApiResponse&lt;String&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<String> testEchoBodyPetResponseStringWithHttpInfo(Pet pet) throws ApiException {
+    HttpRequest.Builder localVarRequestBuilder = testEchoBodyPetResponseStringRequestBuilder(pet);
+    try {
+      HttpResponse<InputStream> localVarResponse = memberVarHttpClient.send(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofInputStream());
+      if (memberVarResponseInterceptor != null) {
+        memberVarResponseInterceptor.accept(localVarResponse);
+      }
+      try {
+        if (localVarResponse.statusCode()/ 100 != 2) {
+          throw getApiException("testEchoBodyPetResponseString", localVarResponse);
+        }
+        // for plain text response
+        if (localVarResponse.headers().map().containsKey("Content-Type") &&
+                "text/plain".equalsIgnoreCase(localVarResponse.headers().map().get("Content-Type").get(0))) {
+          java.util.Scanner s = new java.util.Scanner(localVarResponse.body()).useDelimiter("\\A");
+          String responseBodyText = s.hasNext() ? s.next() : "";
+          return new ApiResponse<String>(
+                  localVarResponse.statusCode(),
+                  localVarResponse.headers().map(),
+                  responseBodyText
+          );
+        } else {
+            throw new RuntimeException("Error! The response Content-Type is supposed to be `text/plain` but it's not: " + localVarResponse);
+        }
+      } finally {
+      }
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      throw new ApiException(e);
+    }
+  }
+
+  private HttpRequest.Builder testEchoBodyPetResponseStringRequestBuilder(Pet pet) throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/echo/body/Pet/response_string";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    localVarRequestBuilder.header("Content-Type", "application/json");
+    localVarRequestBuilder.header("Accept", "text/plain");
+
     try {
       byte[] localVarPostBody = memberVarObjectMapper.writeValueAsBytes(pet);
       localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.ofByteArray(localVarPostBody));

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/FormApi.java

@@ -0,0 +1,155 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Pair;
+
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+
+import java.util.ArrayList;
+import java.util.StringJoiner;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Consumer;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class FormApi {
+  private final HttpClient memberVarHttpClient;
+  private final ObjectMapper memberVarObjectMapper;
+  private final String memberVarBaseUri;
+  private final Consumer<HttpRequest.Builder> memberVarInterceptor;
+  private final Duration memberVarReadTimeout;
+  private final Consumer<HttpResponse<InputStream>> memberVarResponseInterceptor;
+  private final Consumer<HttpResponse<String>> memberVarAsyncResponseInterceptor;
+
+  public FormApi() {
+    this(new ApiClient());
+  }
+
+  public FormApi(ApiClient apiClient) {
+    memberVarHttpClient = apiClient.getHttpClient();
+    memberVarObjectMapper = apiClient.getObjectMapper();
+    memberVarBaseUri = apiClient.getBaseUri();
+    memberVarInterceptor = apiClient.getRequestInterceptor();
+    memberVarReadTimeout = apiClient.getReadTimeout();
+    memberVarResponseInterceptor = apiClient.getResponseInterceptor();
+    memberVarAsyncResponseInterceptor = apiClient.getAsyncResponseInterceptor();
+  }
+
+  protected ApiException getApiException(String operationId, HttpResponse<InputStream> response) throws IOException {
+    String body = response.body() == null ? null : new String(response.body().readAllBytes());
+    String message = formatExceptionMessage(operationId, response.statusCode(), body);
+    return new ApiException(response.statusCode(), message, response.headers(), body);
+  }
+
+  private String formatExceptionMessage(String operationId, int statusCode, String body) {
+    if (body == null || body.isEmpty()) {
+      body = "[no body]";
+    }
+    return operationId + " call failed with: " + statusCode + " - " + body;
+  }
+
+  /**
+   * Test form parameter(s)
+   * Test form parameter(s)
+   * @param integerForm  (optional)
+   * @param booleanForm  (optional)
+   * @param stringForm  (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testFormIntegerBooleanString(Integer integerForm, Boolean booleanForm, String stringForm) throws ApiException {
+    ApiResponse<String> localVarResponse = testFormIntegerBooleanStringWithHttpInfo(integerForm, booleanForm, stringForm);
+    return localVarResponse.getData();
+  }
+
+  /**
+   * Test form parameter(s)
+   * Test form parameter(s)
+   * @param integerForm  (optional)
+   * @param booleanForm  (optional)
+   * @param stringForm  (optional)
+   * @return ApiResponse&lt;String&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<String> testFormIntegerBooleanStringWithHttpInfo(Integer integerForm, Boolean booleanForm, String stringForm) throws ApiException {
+    HttpRequest.Builder localVarRequestBuilder = testFormIntegerBooleanStringRequestBuilder(integerForm, booleanForm, stringForm);
+    try {
+      HttpResponse<InputStream> localVarResponse = memberVarHttpClient.send(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofInputStream());
+      if (memberVarResponseInterceptor != null) {
+        memberVarResponseInterceptor.accept(localVarResponse);
+      }
+      try {
+        if (localVarResponse.statusCode()/ 100 != 2) {
+          throw getApiException("testFormIntegerBooleanString", localVarResponse);
+        }
+        // for plain text response
+        if (localVarResponse.headers().map().containsKey("Content-Type") &&
+                "text/plain".equalsIgnoreCase(localVarResponse.headers().map().get("Content-Type").get(0))) {
+          java.util.Scanner s = new java.util.Scanner(localVarResponse.body()).useDelimiter("\\A");
+          String responseBodyText = s.hasNext() ? s.next() : "";
+          return new ApiResponse<String>(
+                  localVarResponse.statusCode(),
+                  localVarResponse.headers().map(),
+                  responseBodyText
+          );
+        } else {
+            throw new RuntimeException("Error! The response Content-Type is supposed to be `text/plain` but it's not: " + localVarResponse);
+        }
+      } finally {
+      }
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      throw new ApiException(e);
+    }
+  }
+
+  private HttpRequest.Builder testFormIntegerBooleanStringRequestBuilder(Integer integerForm, Boolean booleanForm, String stringForm) throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/form/integer/boolean/string";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    localVarRequestBuilder.header("Accept", "text/plain");
+
+    localVarRequestBuilder.method("POST", HttpRequest.BodyPublishers.noBody());
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
+}

samples/client/echo_api/java/native/src/main/java/org/openapitools/client/api/HeaderApi.java

@@ -0,0 +1,164 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Pair;
+
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+
+import java.util.ArrayList;
+import java.util.StringJoiner;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Consumer;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class HeaderApi {
+  private final HttpClient memberVarHttpClient;
+  private final ObjectMapper memberVarObjectMapper;
+  private final String memberVarBaseUri;
+  private final Consumer<HttpRequest.Builder> memberVarInterceptor;
+  private final Duration memberVarReadTimeout;
+  private final Consumer<HttpResponse<InputStream>> memberVarResponseInterceptor;
+  private final Consumer<HttpResponse<String>> memberVarAsyncResponseInterceptor;
+
+  public HeaderApi() {
+    this(new ApiClient());
+  }
+
+  public HeaderApi(ApiClient apiClient) {
+    memberVarHttpClient = apiClient.getHttpClient();
+    memberVarObjectMapper = apiClient.getObjectMapper();
+    memberVarBaseUri = apiClient.getBaseUri();
+    memberVarInterceptor = apiClient.getRequestInterceptor();
+    memberVarReadTimeout = apiClient.getReadTimeout();
+    memberVarResponseInterceptor = apiClient.getResponseInterceptor();
+    memberVarAsyncResponseInterceptor = apiClient.getAsyncResponseInterceptor();
+  }
+
+  protected ApiException getApiException(String operationId, HttpResponse<InputStream> response) throws IOException {
+    String body = response.body() == null ? null : new String(response.body().readAllBytes());
+    String message = formatExceptionMessage(operationId, response.statusCode(), body);
+    return new ApiException(response.statusCode(), message, response.headers(), body);
+  }
+
+  private String formatExceptionMessage(String operationId, int statusCode, String body) {
+    if (body == null || body.isEmpty()) {
+      body = "[no body]";
+    }
+    return operationId + " call failed with: " + statusCode + " - " + body;
+  }
+
+  /**
+   * Test header parameter(s)
+   * Test header parameter(s)
+   * @param integerHeader  (optional)
+   * @param booleanHeader  (optional)
+   * @param stringHeader  (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String testHeaderIntegerBooleanString(Integer integerHeader, Boolean booleanHeader, String stringHeader) throws ApiException {
+    ApiResponse<String> localVarResponse = testHeaderIntegerBooleanStringWithHttpInfo(integerHeader, booleanHeader, stringHeader);
+    return localVarResponse.getData();
+  }
+
+  /**
+   * Test header parameter(s)
+   * Test header parameter(s)
+   * @param integerHeader  (optional)
+   * @param booleanHeader  (optional)
+   * @param stringHeader  (optional)
+   * @return ApiResponse&lt;String&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public ApiResponse<String> testHeaderIntegerBooleanStringWithHttpInfo(Integer integerHeader, Boolean booleanHeader, String stringHeader) throws ApiException {
+    HttpRequest.Builder localVarRequestBuilder = testHeaderIntegerBooleanStringRequestBuilder(integerHeader, booleanHeader, stringHeader);
+    try {
+      HttpResponse<InputStream> localVarResponse = memberVarHttpClient.send(
+          localVarRequestBuilder.build(),
+          HttpResponse.BodyHandlers.ofInputStream());
+      if (memberVarResponseInterceptor != null) {
+        memberVarResponseInterceptor.accept(localVarResponse);
+      }
+      try {
+        if (localVarResponse.statusCode()/ 100 != 2) {
+          throw getApiException("testHeaderIntegerBooleanString", localVarResponse);
+        }
+        // for plain text response
+        if (localVarResponse.headers().map().containsKey("Content-Type") &&
+                "text/plain".equalsIgnoreCase(localVarResponse.headers().map().get("Content-Type").get(0))) {
+          java.util.Scanner s = new java.util.Scanner(localVarResponse.body()).useDelimiter("\\A");
+          String responseBodyText = s.hasNext() ? s.next() : "";
+          return new ApiResponse<String>(
+                  localVarResponse.statusCode(),
+                  localVarResponse.headers().map(),
+                  responseBodyText
+          );
+        } else {
+            throw new RuntimeException("Error! The response Content-Type is supposed to be `text/plain` but it's not: " + localVarResponse);
+        }
+      } finally {
+      }
+    } catch (IOException e) {
+      throw new ApiException(e);
+    }
+    catch (InterruptedException e) {
+      Thread.currentThread().interrupt();
+      throw new ApiException(e);
+    }
+  }
+
+  private HttpRequest.Builder testHeaderIntegerBooleanStringRequestBuilder(Integer integerHeader, Boolean booleanHeader, String stringHeader) throws ApiException {
+
+    HttpRequest.Builder localVarRequestBuilder = HttpRequest.newBuilder();
+
+    String localVarPath = "/header/integer/boolean/string";
+
+    localVarRequestBuilder.uri(URI.create(memberVarBaseUri + localVarPath));
+
+    if (integerHeader != null) {
+      localVarRequestBuilder.header("integer_header", integerHeader.toString());
+    }
+    if (booleanHeader != null) {
+      localVarRequestBuilder.header("boolean_header", booleanHeader.toString());
+    }
+    if (stringHeader != null) {
+      localVarRequestBuilder.header("string_header", stringHeader.toString());
+    }
+    localVarRequestBuilder.header("Accept", "text/plain");
+
+    localVarRequestBuilder.method("GET", HttpRequest.BodyPublishers.noBody());
+    if (memberVarReadTimeout != null) {
+      localVarRequestBuilder.timeout(memberVarReadTimeout);
+    }
+    if (memberVarInterceptor != null) {
+      memberVarInterceptor.accept(localVarRequestBuilder);
+    }
+    return localVarRequestBuilder;
+  }
+}

samples/client/echo_api/java/native/src/test/java/org/openapitools/client/api/FormApiTest.java

@@ -0,0 +1,55 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.junit.Test;
+import org.junit.Ignore;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+
+/**
+ * API tests for FormApi
+ */
+@Ignore
+public class FormApiTest {
+
+    private final FormApi api = new FormApi();
+
+    
+    /**
+     * Test form parameter(s)
+     *
+     * Test form parameter(s)
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testFormIntegerBooleanStringTest() throws ApiException {
+        Integer integerForm = null;
+        Boolean booleanForm = null;
+        String stringForm = null;
+        String response = 
+        api.testFormIntegerBooleanString(integerForm, booleanForm, stringForm);
+        
+        // TODO: test validations
+    }
+    
+}

samples/client/echo_api/java/native/src/test/java/org/openapitools/client/api/HeaderApiTest.java

@@ -0,0 +1,55 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.junit.Test;
+import org.junit.Ignore;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+
+/**
+ * API tests for HeaderApi
+ */
+@Ignore
+public class HeaderApiTest {
+
+    private final HeaderApi api = new HeaderApi();
+
+    
+    /**
+     * Test header parameter(s)
+     *
+     * Test header parameter(s)
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testHeaderIntegerBooleanStringTest() throws ApiException {
+        Integer integerHeader = null;
+        Boolean booleanHeader = null;
+        String stringHeader = null;
+        String response = 
+        api.testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader);
+        
+        // TODO: test validations
+    }
+    
+}

samples/client/echo_api/java/okhttp-gson/.openapi-generator/FILES

@@ -11,6 +11,8 @@ docs/Category.md
 docs/DataQuery.md
 docs/DataQueryAllOf.md
 docs/DefaultValue.md
+docs/FormApi.md
+docs/HeaderApi.md
 docs/PathApi.md
 docs/Pet.md
 docs/Query.md
@@ -41,6 +43,8 @@ src/main/java/org/openapitools/client/ServerConfiguration.java
 src/main/java/org/openapitools/client/ServerVariable.java
 src/main/java/org/openapitools/client/StringUtil.java
 src/main/java/org/openapitools/client/api/BodyApi.java
+src/main/java/org/openapitools/client/api/FormApi.java
+src/main/java/org/openapitools/client/api/HeaderApi.java
 src/main/java/org/openapitools/client/api/PathApi.java
 src/main/java/org/openapitools/client/api/QueryApi.java
 src/main/java/org/openapitools/client/auth/ApiKeyAuth.java

samples/client/echo_api/java/okhttp-gson/README.md

@@ -114,6 +114,9 @@ All URIs are relative to *http://localhost:3000*
 Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
 *BodyApi* | [**testEchoBodyPet**](docs/BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s)
+*BodyApi* | [**testEchoBodyPetResponseString**](docs/BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body
+*FormApi* | [**testFormIntegerBooleanString**](docs/FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s)
+*HeaderApi* | [**testHeaderIntegerBooleanString**](docs/HeaderApi.md#testHeaderIntegerBooleanString) | **GET** /header/integer/boolean/string | Test header parameter(s)
 *PathApi* | [**testsPathStringPathStringIntegerPathInteger**](docs/PathApi.md#testsPathStringPathStringIntegerPathInteger) | **GET** /path/string/{path_string}/integer/{path_integer} | Test path parameter(s)
 *QueryApi* | [**testQueryIntegerBooleanString**](docs/QueryApi.md#testQueryIntegerBooleanString) | **GET** /query/integer/boolean/string | Test query parameter(s)
 *QueryApi* | [**testQueryStyleDeepObjectExplodeTrueObject**](docs/QueryApi.md#testQueryStyleDeepObjectExplodeTrueObject) | **GET** /query/style_deepObject/explode_true/object | Test query parameter(s)

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

@@ -41,6 +41,64 @@ paths:
       tags:
       - path
       x-accepts: text/plain
+  /form/integer/boolean/string:
+    post:
+      description: Test form parameter(s)
+      operationId: test/form/integer/boolean/string
+      requestBody:
+        content:
+          application/x-www-form-urlencoded:
+            schema:
+              $ref: '#/components/schemas/test_form_integer_boolean_string_request'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test form parameter(s)
+      tags:
+      - form
+      x-content-type: application/x-www-form-urlencoded
+      x-accepts: text/plain
+  /header/integer/boolean/string:
+    get:
+      description: Test header parameter(s)
+      operationId: test/header/integer/boolean/string
+      parameters:
+      - explode: true
+        in: header
+        name: integer_header
+        required: false
+        schema:
+          type: integer
+        style: form
+      - explode: true
+        in: header
+        name: boolean_header
+        required: false
+        schema:
+          type: boolean
+        style: form
+      - explode: true
+        in: header
+        name: string_header
+        required: false
+        schema:
+          type: string
+        style: form
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test header parameter(s)
+      tags:
+      - header
+      x-accepts: text/plain
   /query/integer/boolean/string:
     get:
       description: Test query parameter(s)
@@ -211,6 +269,24 @@ paths:
       - body
       x-content-type: application/json
       x-accepts: application/json
+  /echo/body/Pet/response_string:
+    post:
+      description: Test empty response body
+      operationId: test/echo/body/Pet/response_string
+      requestBody:
+        $ref: '#/components/requestBodies/Pet'
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test empty response body
+      tags:
+      - body
+      x-content-type: application/json
+      x-accepts: text/plain
 components:
   requestBodies:
     Pet:
@@ -372,6 +448,15 @@ components:
       allOf:
       - $ref: '#/components/schemas/DataQuery_allOf'
       - $ref: '#/components/schemas/Query'
+    test_form_integer_boolean_string_request:
+      properties:
+        integer_form:
+          type: integer
+        boolean_form:
+          type: boolean
+        string_form:
+          type: string
+      type: object
     test_query_style_form_explode_true_array_string_query_object_parameter:
       properties:
         values:

samples/client/echo_api/java/okhttp-gson/docs/BodyApi.md

@@ -5,6 +5,7 @@ All URIs are relative to *http://localhost:3000*
 | Method | HTTP request | Description |
 |------------- | ------------- | -------------|
 | [**testEchoBodyPet**](BodyApi.md#testEchoBodyPet) | **POST** /echo/body/Pet | Test body parameter(s) |
+| [**testEchoBodyPetResponseString**](BodyApi.md#testEchoBodyPetResponseString) | **POST** /echo/body/Pet/response_string | Test empty response body |
 
 
 <a name="testEchoBodyPet"></a>
@@ -69,3 +70,65 @@ No authorization required
 |-------------|-------------|------------------|
 | **200** | Successful operation |  -  |
 
+<a name="testEchoBodyPetResponseString"></a>
+# **testEchoBodyPetResponseString**
+> String testEchoBodyPetResponseString(pet)
+
+Test empty response body
+
+Test empty response body
+
+### Example
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.BodyApi;
+
+public class Example {
+  public static void main(String[] args) {
+    ApiClient defaultClient = Configuration.getDefaultApiClient();
+    defaultClient.setBasePath("http://localhost:3000");
+
+    BodyApi apiInstance = new BodyApi(defaultClient);
+    Pet pet = new Pet(); // Pet | Pet object that needs to be added to the store
+    try {
+      String result = apiInstance.testEchoBodyPetResponseString(pet);
+      System.out.println(result);
+    } catch (ApiException e) {
+      System.err.println("Exception when calling BodyApi#testEchoBodyPetResponseString");
+      System.err.println("Status code: " + e.getCode());
+      System.err.println("Reason: " + e.getResponseBody());
+      System.err.println("Response headers: " + e.getResponseHeaders());
+      e.printStackTrace();
+    }
+  }
+}
+```
+
+### Parameters
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **pet** | [**Pet**](Pet.md)| Pet object that needs to be added to the store | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

samples/client/echo_api/java/okhttp-gson/docs/FormApi.md

@@ -0,0 +1,75 @@
+# FormApi
+
+All URIs are relative to *http://localhost:3000*
+
+| Method | HTTP request | Description |
+|------------- | ------------- | -------------|
+| [**testFormIntegerBooleanString**](FormApi.md#testFormIntegerBooleanString) | **POST** /form/integer/boolean/string | Test form parameter(s) |
+
+
+<a name="testFormIntegerBooleanString"></a>
+# **testFormIntegerBooleanString**
+> String testFormIntegerBooleanString(integerForm, booleanForm, stringForm)
+
+Test form parameter(s)
+
+Test form parameter(s)
+
+### Example
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.FormApi;
+
+public class Example {
+  public static void main(String[] args) {
+    ApiClient defaultClient = Configuration.getDefaultApiClient();
+    defaultClient.setBasePath("http://localhost:3000");
+
+    FormApi apiInstance = new FormApi(defaultClient);
+    Integer integerForm = 56; // Integer | 
+    Boolean booleanForm = true; // Boolean | 
+    String stringForm = "stringForm_example"; // String | 
+    try {
+      String result = apiInstance.testFormIntegerBooleanString(integerForm, booleanForm, stringForm);
+      System.out.println(result);
+    } catch (ApiException e) {
+      System.err.println("Exception when calling FormApi#testFormIntegerBooleanString");
+      System.err.println("Status code: " + e.getCode());
+      System.err.println("Reason: " + e.getResponseBody());
+      System.err.println("Response headers: " + e.getResponseHeaders());
+      e.printStackTrace();
+    }
+  }
+}
+```
+
+### Parameters
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **integerForm** | **Integer**|  | [optional] |
+| **booleanForm** | **Boolean**|  | [optional] |
+| **stringForm** | **String**|  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/x-www-form-urlencoded
+ - **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

samples/client/echo_api/java/okhttp-gson/docs/HeaderApi.md

@@ -0,0 +1,75 @@
+# HeaderApi
+
+All URIs are relative to *http://localhost:3000*
+
+| Method | HTTP request | Description |
+|------------- | ------------- | -------------|
+| [**testHeaderIntegerBooleanString**](HeaderApi.md#testHeaderIntegerBooleanString) | **GET** /header/integer/boolean/string | Test header parameter(s) |
+
+
+<a name="testHeaderIntegerBooleanString"></a>
+# **testHeaderIntegerBooleanString**
+> String testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader)
+
+Test header parameter(s)
+
+Test header parameter(s)
+
+### Example
+```java
+// Import classes:
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.models.*;
+import org.openapitools.client.api.HeaderApi;
+
+public class Example {
+  public static void main(String[] args) {
+    ApiClient defaultClient = Configuration.getDefaultApiClient();
+    defaultClient.setBasePath("http://localhost:3000");
+
+    HeaderApi apiInstance = new HeaderApi(defaultClient);
+    Integer integerHeader = 56; // Integer | 
+    Boolean booleanHeader = true; // Boolean | 
+    String stringHeader = "stringHeader_example"; // String | 
+    try {
+      String result = apiInstance.testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader);
+      System.out.println(result);
+    } catch (ApiException e) {
+      System.err.println("Exception when calling HeaderApi#testHeaderIntegerBooleanString");
+      System.err.println("Status code: " + e.getCode());
+      System.err.println("Reason: " + e.getResponseBody());
+      System.err.println("Response headers: " + e.getResponseHeaders());
+      e.printStackTrace();
+    }
+  }
+}
+```
+
+### Parameters
+
+| Name | Type | Description  | Notes |
+|------------- | ------------- | ------------- | -------------|
+| **integerHeader** | **Integer**|  | [optional] |
+| **booleanHeader** | **Boolean**|  | [optional] |
+| **stringHeader** | **String**|  | [optional] |
+
+### Return type
+
+**String**
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+### HTTP response details
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+| **200** | Successful operation |  -  |
+

samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/BodyApi.java

@@ -191,4 +191,122 @@ public class BodyApi {
         localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
         return localVarCall;
     }
+    /**
+     * Build call for testEchoBodyPetResponseString
+     * @param pet Pet object that needs to be added to the store (optional)
+     * @param _callback Callback for upload/download progress
+     * @return Call to execute
+     * @throws ApiException If fail to serialize the request body object
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testEchoBodyPetResponseStringCall(Pet pet, final ApiCallback _callback) throws ApiException {
+        String basePath = null;
+        // Operation Servers
+        String[] localBasePaths = new String[] {  };
+
+        // Determine Base Path to Use
+        if (localCustomBaseUrl != null){
+            basePath = localCustomBaseUrl;
+        } else if ( localBasePaths.length > 0 ) {
+            basePath = localBasePaths[localHostIndex];
+        } else {
+            basePath = null;
+        }
+
+        Object localVarPostBody = pet;
+
+        // create path and map variables
+        String localVarPath = "/echo/body/Pet/response_string";
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+        Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+        Map<String, String> localVarCookieParams = new HashMap<String, String>();
+        Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+        final String[] localVarAccepts = {
+            "text/plain"
+        };
+        final String localVarAccept = localVarApiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) {
+            localVarHeaderParams.put("Accept", localVarAccept);
+        }
+
+        final String[] localVarContentTypes = {
+            "application/json"
+        };
+        final String localVarContentType = localVarApiClient.selectHeaderContentType(localVarContentTypes);
+        if (localVarContentType != null) {
+            localVarHeaderParams.put("Content-Type", localVarContentType);
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return localVarApiClient.buildCall(basePath, localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAuthNames, _callback);
+    }
+
+    @SuppressWarnings("rawtypes")
+    private okhttp3.Call testEchoBodyPetResponseStringValidateBeforeCall(Pet pet, final ApiCallback _callback) throws ApiException {
+        return testEchoBodyPetResponseStringCall(pet, _callback);
+
+    }
+
+    /**
+     * Test empty response body
+     * Test empty response body
+     * @param pet Pet object that needs to be added to the store (optional)
+     * @return String
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public String testEchoBodyPetResponseString(Pet pet) throws ApiException {
+        ApiResponse<String> localVarResp = testEchoBodyPetResponseStringWithHttpInfo(pet);
+        return localVarResp.getData();
+    }
+
+    /**
+     * Test empty response body
+     * Test empty response body
+     * @param pet Pet object that needs to be added to the store (optional)
+     * @return ApiResponse&lt;String&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public ApiResponse<String> testEchoBodyPetResponseStringWithHttpInfo(Pet pet) throws ApiException {
+        okhttp3.Call localVarCall = testEchoBodyPetResponseStringValidateBeforeCall(pet, null);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        return localVarApiClient.execute(localVarCall, localVarReturnType);
+    }
+
+    /**
+     * Test empty response body (asynchronously)
+     * Test empty response body
+     * @param pet Pet object that needs to be added to the store (optional)
+     * @param _callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testEchoBodyPetResponseStringAsync(Pet pet, final ApiCallback<String> _callback) throws ApiException {
+
+        okhttp3.Call localVarCall = testEchoBodyPetResponseStringValidateBeforeCall(pet, _callback);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
+        return localVarCall;
+    }
 }

samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/FormApi.java

@@ -0,0 +1,213 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiCallback;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.Pair;
+import org.openapitools.client.ProgressRequestBody;
+import org.openapitools.client.ProgressResponseBody;
+
+import com.google.gson.reflect.TypeToken;
+
+import java.io.IOException;
+
+
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import javax.ws.rs.core.GenericType;
+
+public class FormApi {
+    private ApiClient localVarApiClient;
+    private int localHostIndex;
+    private String localCustomBaseUrl;
+
+    public FormApi() {
+        this(Configuration.getDefaultApiClient());
+    }
+
+    public FormApi(ApiClient apiClient) {
+        this.localVarApiClient = apiClient;
+    }
+
+    public ApiClient getApiClient() {
+        return localVarApiClient;
+    }
+
+    public void setApiClient(ApiClient apiClient) {
+        this.localVarApiClient = apiClient;
+    }
+
+    public int getHostIndex() {
+        return localHostIndex;
+    }
+
+    public void setHostIndex(int hostIndex) {
+        this.localHostIndex = hostIndex;
+    }
+
+    public String getCustomBaseUrl() {
+        return localCustomBaseUrl;
+    }
+
+    public void setCustomBaseUrl(String customBaseUrl) {
+        this.localCustomBaseUrl = customBaseUrl;
+    }
+
+    /**
+     * Build call for testFormIntegerBooleanString
+     * @param integerForm  (optional)
+     * @param booleanForm  (optional)
+     * @param stringForm  (optional)
+     * @param _callback Callback for upload/download progress
+     * @return Call to execute
+     * @throws ApiException If fail to serialize the request body object
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testFormIntegerBooleanStringCall(Integer integerForm, Boolean booleanForm, String stringForm, final ApiCallback _callback) throws ApiException {
+        String basePath = null;
+        // Operation Servers
+        String[] localBasePaths = new String[] {  };
+
+        // Determine Base Path to Use
+        if (localCustomBaseUrl != null){
+            basePath = localCustomBaseUrl;
+        } else if ( localBasePaths.length > 0 ) {
+            basePath = localBasePaths[localHostIndex];
+        } else {
+            basePath = null;
+        }
+
+        Object localVarPostBody = null;
+
+        // create path and map variables
+        String localVarPath = "/form/integer/boolean/string";
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+        Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+        Map<String, String> localVarCookieParams = new HashMap<String, String>();
+        Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+        if (integerForm != null) {
+            localVarFormParams.put("integer_form", integerForm);
+        }
+
+        if (booleanForm != null) {
+            localVarFormParams.put("boolean_form", booleanForm);
+        }
+
+        if (stringForm != null) {
+            localVarFormParams.put("string_form", stringForm);
+        }
+
+        final String[] localVarAccepts = {
+            "text/plain"
+        };
+        final String localVarAccept = localVarApiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) {
+            localVarHeaderParams.put("Accept", localVarAccept);
+        }
+
+        final String[] localVarContentTypes = {
+            "application/x-www-form-urlencoded"
+        };
+        final String localVarContentType = localVarApiClient.selectHeaderContentType(localVarContentTypes);
+        if (localVarContentType != null) {
+            localVarHeaderParams.put("Content-Type", localVarContentType);
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return localVarApiClient.buildCall(basePath, localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAuthNames, _callback);
+    }
+
+    @SuppressWarnings("rawtypes")
+    private okhttp3.Call testFormIntegerBooleanStringValidateBeforeCall(Integer integerForm, Boolean booleanForm, String stringForm, final ApiCallback _callback) throws ApiException {
+        return testFormIntegerBooleanStringCall(integerForm, booleanForm, stringForm, _callback);
+
+    }
+
+    /**
+     * Test form parameter(s)
+     * Test form parameter(s)
+     * @param integerForm  (optional)
+     * @param booleanForm  (optional)
+     * @param stringForm  (optional)
+     * @return String
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public String testFormIntegerBooleanString(Integer integerForm, Boolean booleanForm, String stringForm) throws ApiException {
+        ApiResponse<String> localVarResp = testFormIntegerBooleanStringWithHttpInfo(integerForm, booleanForm, stringForm);
+        return localVarResp.getData();
+    }
+
+    /**
+     * Test form parameter(s)
+     * Test form parameter(s)
+     * @param integerForm  (optional)
+     * @param booleanForm  (optional)
+     * @param stringForm  (optional)
+     * @return ApiResponse&lt;String&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public ApiResponse<String> testFormIntegerBooleanStringWithHttpInfo(Integer integerForm, Boolean booleanForm, String stringForm) throws ApiException {
+        okhttp3.Call localVarCall = testFormIntegerBooleanStringValidateBeforeCall(integerForm, booleanForm, stringForm, null);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        return localVarApiClient.execute(localVarCall, localVarReturnType);
+    }
+
+    /**
+     * Test form parameter(s) (asynchronously)
+     * Test form parameter(s)
+     * @param integerForm  (optional)
+     * @param booleanForm  (optional)
+     * @param stringForm  (optional)
+     * @param _callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testFormIntegerBooleanStringAsync(Integer integerForm, Boolean booleanForm, String stringForm, final ApiCallback<String> _callback) throws ApiException {
+
+        okhttp3.Call localVarCall = testFormIntegerBooleanStringValidateBeforeCall(integerForm, booleanForm, stringForm, _callback);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
+        return localVarCall;
+    }
+}

samples/client/echo_api/java/okhttp-gson/src/main/java/org/openapitools/client/api/HeaderApi.java

@@ -0,0 +1,212 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiCallback;
+import org.openapitools.client.ApiClient;
+import org.openapitools.client.ApiException;
+import org.openapitools.client.ApiResponse;
+import org.openapitools.client.Configuration;
+import org.openapitools.client.Pair;
+import org.openapitools.client.ProgressRequestBody;
+import org.openapitools.client.ProgressResponseBody;
+
+import com.google.gson.reflect.TypeToken;
+
+import java.io.IOException;
+
+
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import javax.ws.rs.core.GenericType;
+
+public class HeaderApi {
+    private ApiClient localVarApiClient;
+    private int localHostIndex;
+    private String localCustomBaseUrl;
+
+    public HeaderApi() {
+        this(Configuration.getDefaultApiClient());
+    }
+
+    public HeaderApi(ApiClient apiClient) {
+        this.localVarApiClient = apiClient;
+    }
+
+    public ApiClient getApiClient() {
+        return localVarApiClient;
+    }
+
+    public void setApiClient(ApiClient apiClient) {
+        this.localVarApiClient = apiClient;
+    }
+
+    public int getHostIndex() {
+        return localHostIndex;
+    }
+
+    public void setHostIndex(int hostIndex) {
+        this.localHostIndex = hostIndex;
+    }
+
+    public String getCustomBaseUrl() {
+        return localCustomBaseUrl;
+    }
+
+    public void setCustomBaseUrl(String customBaseUrl) {
+        this.localCustomBaseUrl = customBaseUrl;
+    }
+
+    /**
+     * Build call for testHeaderIntegerBooleanString
+     * @param integerHeader  (optional)
+     * @param booleanHeader  (optional)
+     * @param stringHeader  (optional)
+     * @param _callback Callback for upload/download progress
+     * @return Call to execute
+     * @throws ApiException If fail to serialize the request body object
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testHeaderIntegerBooleanStringCall(Integer integerHeader, Boolean booleanHeader, String stringHeader, final ApiCallback _callback) throws ApiException {
+        String basePath = null;
+        // Operation Servers
+        String[] localBasePaths = new String[] {  };
+
+        // Determine Base Path to Use
+        if (localCustomBaseUrl != null){
+            basePath = localCustomBaseUrl;
+        } else if ( localBasePaths.length > 0 ) {
+            basePath = localBasePaths[localHostIndex];
+        } else {
+            basePath = null;
+        }
+
+        Object localVarPostBody = null;
+
+        // create path and map variables
+        String localVarPath = "/header/integer/boolean/string";
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        List<Pair> localVarCollectionQueryParams = new ArrayList<Pair>();
+        Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+        Map<String, String> localVarCookieParams = new HashMap<String, String>();
+        Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+        if (integerHeader != null) {
+            localVarHeaderParams.put("integer_header", localVarApiClient.parameterToString(integerHeader));
+        }
+
+        if (booleanHeader != null) {
+            localVarHeaderParams.put("boolean_header", localVarApiClient.parameterToString(booleanHeader));
+        }
+
+        if (stringHeader != null) {
+            localVarHeaderParams.put("string_header", localVarApiClient.parameterToString(stringHeader));
+        }
+
+        final String[] localVarAccepts = {
+            "text/plain"
+        };
+        final String localVarAccept = localVarApiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) {
+            localVarHeaderParams.put("Accept", localVarAccept);
+        }
+
+        final String[] localVarContentTypes = {
+        };
+        final String localVarContentType = localVarApiClient.selectHeaderContentType(localVarContentTypes);
+        if (localVarContentType != null) {
+            localVarHeaderParams.put("Content-Type", localVarContentType);
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return localVarApiClient.buildCall(basePath, localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAuthNames, _callback);
+    }
+
+    @SuppressWarnings("rawtypes")
+    private okhttp3.Call testHeaderIntegerBooleanStringValidateBeforeCall(Integer integerHeader, Boolean booleanHeader, String stringHeader, final ApiCallback _callback) throws ApiException {
+        return testHeaderIntegerBooleanStringCall(integerHeader, booleanHeader, stringHeader, _callback);
+
+    }
+
+    /**
+     * Test header parameter(s)
+     * Test header parameter(s)
+     * @param integerHeader  (optional)
+     * @param booleanHeader  (optional)
+     * @param stringHeader  (optional)
+     * @return String
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public String testHeaderIntegerBooleanString(Integer integerHeader, Boolean booleanHeader, String stringHeader) throws ApiException {
+        ApiResponse<String> localVarResp = testHeaderIntegerBooleanStringWithHttpInfo(integerHeader, booleanHeader, stringHeader);
+        return localVarResp.getData();
+    }
+
+    /**
+     * Test header parameter(s)
+     * Test header parameter(s)
+     * @param integerHeader  (optional)
+     * @param booleanHeader  (optional)
+     * @param stringHeader  (optional)
+     * @return ApiResponse&lt;String&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public ApiResponse<String> testHeaderIntegerBooleanStringWithHttpInfo(Integer integerHeader, Boolean booleanHeader, String stringHeader) throws ApiException {
+        okhttp3.Call localVarCall = testHeaderIntegerBooleanStringValidateBeforeCall(integerHeader, booleanHeader, stringHeader, null);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        return localVarApiClient.execute(localVarCall, localVarReturnType);
+    }
+
+    /**
+     * Test header parameter(s) (asynchronously)
+     * Test header parameter(s)
+     * @param integerHeader  (optional)
+     * @param booleanHeader  (optional)
+     * @param stringHeader  (optional)
+     * @param _callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     * @http.response.details
+     <table summary="Response Details" border="1">
+        <tr><td> Status Code </td><td> Description </td><td> Response Headers </td></tr>
+        <tr><td> 200 </td><td> Successful operation </td><td>  -  </td></tr>
+     </table>
+     */
+    public okhttp3.Call testHeaderIntegerBooleanStringAsync(Integer integerHeader, Boolean booleanHeader, String stringHeader, final ApiCallback<String> _callback) throws ApiException {
+
+        okhttp3.Call localVarCall = testHeaderIntegerBooleanStringValidateBeforeCall(integerHeader, booleanHeader, stringHeader, _callback);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        localVarApiClient.executeAsync(localVarCall, localVarReturnType, _callback);
+        return localVarCall;
+    }
+}

samples/client/echo_api/java/okhttp-gson/src/test/java/org/openapitools/client/api/FormApiTest.java

@@ -0,0 +1,49 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for FormApi
+ */
+@Disabled
+public class FormApiTest {
+
+    private final FormApi api = new FormApi();
+
+    /**
+     * Test form parameter(s)
+     *
+     * Test form parameter(s)
+     *
+     * @throws ApiException if the Api call fails
+     */
+    @Test
+    public void testFormIntegerBooleanStringTest() throws ApiException {
+        Integer integerForm = null;
+        Boolean booleanForm = null;
+        String stringForm = null;
+        String response = api.testFormIntegerBooleanString(integerForm, booleanForm, stringForm);
+        // TODO: test validations
+    }
+
+}

samples/client/echo_api/java/okhttp-gson/src/test/java/org/openapitools/client/api/HeaderApiTest.java

@@ -0,0 +1,49 @@
+/*
+ * Echo Server API
+ * Echo Server API
+ *
+ * The version of the OpenAPI document: 0.1.0
+ * Contact: team@openapitools.org
+ *
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+
+package org.openapitools.client.api;
+
+import org.openapitools.client.ApiException;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for HeaderApi
+ */
+@Disabled
+public class HeaderApiTest {
+
+    private final HeaderApi api = new HeaderApi();
+
+    /**
+     * Test header parameter(s)
+     *
+     * Test header parameter(s)
+     *
+     * @throws ApiException if the Api call fails
+     */
+    @Test
+    public void testHeaderIntegerBooleanStringTest() throws ApiException {
+        Integer integerHeader = null;
+        Boolean booleanHeader = null;
+        String stringHeader = null;
+        String response = api.testHeaderIntegerBooleanString(integerHeader, booleanHeader, stringHeader);
+        // TODO: test validations
+    }
+
+}