[JAVA] Add apache httpclient library to java clients (#10218)

* Add apache java client option

* Add sample apache client config

* Switch serialization library, use time formatter

* Add pom template for apache dependencies

* Add initial implementation of ApiClient using apache

* Add apache api template

Plus switch to TypeReference to handle generic types

* Add support for sending json data

* Generate test stubs with @Ignore

* Add accept header

* Remove unnecessary builder assignments

* Set responseHeaders instance variable

* Switch to general serialize / deserialize functions

* Handle sending url encoded form data

* Split response processing into new method

* Allow requests without body

* Use general HttpResponse interface

If the method doesn't need to close it

* Use clients connection timeout

* Add constructor accepting custom client

* Handle multipart and direct file uploads

* Support file downloading

Based on the implementation in the jersey client

* Handle missing content disposition

* Raise error if body given for an unexpected method

* Use try with resources for response handling

* Remove unused url parameter encode method

* Handle content type parse exception

* Improve response content type handling

Would have had issues with content type headers containing a charset

* Make all set methods return client

* Add basic readme

* Send content type with files

* Set domain and path on cookies

Otherwise they will be excluded from the request

* Use consistent quoting in error messages

* Add generated apache sample

* Add generated docs changes

* update samples

* rename library, update samples, docs

* update readme

Co-authored-by: Harry White <hwhite@atlassian.com>

samples/client/petstore/java/apache-httpclient/src/main/AndroidManifest.xml

@@ -0,0 +1,3 @@
+<manifest package="org.openapitools.client" xmlns:android="http://schemas.android.com/apk/res/android">
+    <application />
+</manifest>

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/ApiClient.java

@@ -0,0 +1,848 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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;
+
+import org.threeten.bp.*;
+
+import com.fasterxml.jackson.annotation.*;
+import com.fasterxml.jackson.databind.*;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import com.fasterxml.jackson.datatype.threetenbp.ThreeTenModule;
+import com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider;
+
+import com.sun.jersey.api.client.Client;
+import com.sun.jersey.api.client.ClientResponse;
+import com.sun.jersey.api.client.GenericType;
+import com.sun.jersey.api.client.config.DefaultClientConfig;
+import com.sun.jersey.api.client.filter.GZIPContentEncodingFilter;
+import com.sun.jersey.api.client.filter.LoggingFilter;
+import com.sun.jersey.api.client.WebResource.Builder;
+
+import com.sun.jersey.multipart.FormDataMultiPart;
+import com.sun.jersey.multipart.file.FileDataBodyPart;
+
+import javax.ws.rs.core.Cookie;
+import javax.ws.rs.core.Response.Status.Family;
+import javax.ws.rs.core.MediaType;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Arrays;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.TimeZone;
+
+import java.net.URLEncoder;
+
+import java.io.File;
+import java.io.UnsupportedEncodingException;
+
+import java.text.DateFormat;
+
+import org.openapitools.client.auth.Authentication;
+import org.openapitools.client.auth.HttpBasicAuth;
+import org.openapitools.client.auth.ApiKeyAuth;
+import org.openapitools.client.auth.OAuth;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ApiClient extends JavaTimeFormatter {
+  private Map<String, String> defaultHeaderMap = new HashMap<String, String>();
+  private Map<String, String> defaultCookieMap = new HashMap<String, String>();
+  private String basePath = "http://petstore.swagger.io:80/v2";
+  protected List<ServerConfiguration> servers = new ArrayList<ServerConfiguration>(Arrays.asList(
+    new ServerConfiguration(
+      "http://petstore.swagger.io:80/v2",
+      "No description provided",
+      new HashMap<String, ServerVariable>()
+    )
+  ));
+  protected Integer serverIndex = 0;
+  protected Map<String, String> serverVariables = null;
+  private boolean debugging = false;
+  private int connectionTimeout = 0;
+
+  private Client httpClient;
+  private ObjectMapper objectMapper;
+
+  private Map<String, Authentication> authentications;
+
+  private int statusCode;
+  private Map<String, List<String>> responseHeaders;
+
+  private DateFormat dateFormat;
+
+  public ApiClient() {
+    objectMapper = new ObjectMapper();
+    objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+    objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+    objectMapper.configure(DeserializationFeature.FAIL_ON_INVALID_SUBTYPE, false);
+    objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
+    objectMapper.enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING);
+    objectMapper.enable(DeserializationFeature.READ_ENUMS_USING_TO_STRING);
+    objectMapper.registerModule(new JavaTimeModule());
+    ThreeTenModule module = new ThreeTenModule();
+    module.addDeserializer(Instant.class, CustomInstantDeserializer.INSTANT);
+    module.addDeserializer(OffsetDateTime.class, CustomInstantDeserializer.OFFSET_DATE_TIME);
+    module.addDeserializer(ZonedDateTime.class, CustomInstantDeserializer.ZONED_DATE_TIME);
+    objectMapper.registerModule(module);
+    objectMapper.setDateFormat(ApiClient.buildDefaultDateFormat());
+
+    dateFormat = ApiClient.buildDefaultDateFormat();
+
+    // Set default User-Agent.
+    setUserAgent("OpenAPI-Generator/1.0.0/java");
+
+    // Setup authentications (key: authentication name, value: authentication).
+    authentications = new HashMap<String, Authentication>();
+    authentications.put("api_key", new ApiKeyAuth("header", "api_key"));
+    authentications.put("api_key_query", new ApiKeyAuth("query", "api_key_query"));
+    authentications.put("http_basic_test", new HttpBasicAuth());
+    authentications.put("petstore_auth", new OAuth());
+    // Prevent the authentications from being modified.
+    authentications = Collections.unmodifiableMap(authentications);
+
+    rebuildHttpClient();
+  }
+
+  public static DateFormat buildDefaultDateFormat() {
+    return new RFC3339DateFormat();
+  }
+
+  /**
+   * Build the Client used to make HTTP requests with the latest settings,
+   * i.e. objectMapper and debugging.
+   * TODO: better to use the Builder Pattern?
+   * @return API client
+   */
+  public ApiClient rebuildHttpClient() {
+    // Add the JSON serialization support to Jersey
+    JacksonJsonProvider jsonProvider = new JacksonJsonProvider(objectMapper);
+    DefaultClientConfig conf = new DefaultClientConfig();
+    conf.getSingletons().add(jsonProvider);
+    Client client = Client.create(conf);
+    client.addFilter(new GZIPContentEncodingFilter(false));
+    if (debugging) {
+      client.addFilter(new LoggingFilter());
+    }
+    this.httpClient = client;
+    return this;
+  }
+
+  /**
+   * Returns the current object mapper used for JSON serialization/deserialization.
+   * <p>
+   * Note: If you make changes to the object mapper, remember to set it back via
+   * <code>setObjectMapper</code> in order to trigger HTTP client rebuilding.
+   * </p>
+   * @return Object mapper
+   */
+  public ObjectMapper getObjectMapper() {
+    return objectMapper;
+  }
+
+  public ApiClient setObjectMapper(ObjectMapper objectMapper) {
+    this.objectMapper = objectMapper;
+    // Need to rebuild the Client as it depends on object mapper.
+    rebuildHttpClient();
+    return this;
+  }
+
+  public Client getHttpClient() {
+    return httpClient;
+  }
+
+  public ApiClient setHttpClient(Client httpClient) {
+    this.httpClient = httpClient;
+    return this;
+  }
+
+  public String getBasePath() {
+    return basePath;
+  }
+
+  public ApiClient setBasePath(String basePath) {
+    this.basePath = basePath;
+    return this;
+  }
+
+  public List<ServerConfiguration> getServers() {
+    return servers;
+  }
+
+  public ApiClient setServers(List<ServerConfiguration> servers) {
+    this.servers = servers;
+    return this;
+  }
+
+  public Integer getServerIndex() {
+    return serverIndex;
+  }
+
+  public ApiClient setServerIndex(Integer serverIndex) {
+    this.serverIndex = serverIndex;
+    return this;
+  }
+
+  public Map<String, String> getServerVariables() {
+    return serverVariables;
+  }
+
+  public ApiClient setServerVariables(Map<String, String> serverVariables) {
+    this.serverVariables = serverVariables;
+    return this;
+  }
+
+  /**
+   * Gets the status code of the previous request
+   * @return Status code
+   */
+  public int getStatusCode() {
+    return statusCode;
+  }
+
+  /**
+   * Gets the response headers of the previous request
+   * @return Response headers
+   */
+  public Map<String, List<String>> getResponseHeaders() {
+    return responseHeaders;
+  }
+
+  /**
+   * Get authentications (key: authentication name, value: authentication).
+   * @return Map of authentication
+   */
+  public Map<String, Authentication> getAuthentications() {
+    return authentications;
+  }
+
+  /**
+   * Get authentication for the given name.
+   *
+   * @param authName The authentication name
+   * @return The authentication, null if not found
+   */
+  public Authentication getAuthentication(String authName) {
+    return authentications.get(authName);
+  }
+
+
+  /**
+   * Helper method to set username for the first HTTP basic authentication.
+   * @param username Username
+   */
+  public void setUsername(String username) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof HttpBasicAuth) {
+        ((HttpBasicAuth) auth).setUsername(username);
+        return;
+      }
+    }
+    throw new RuntimeException("No HTTP basic authentication configured!");
+  }
+
+  /**
+   * Helper method to set password for the first HTTP basic authentication.
+   * @param password Password
+   */
+  public void setPassword(String password) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof HttpBasicAuth) {
+        ((HttpBasicAuth) auth).setPassword(password);
+        return;
+      }
+    }
+    throw new RuntimeException("No HTTP basic authentication configured!");
+  }
+
+
+  /**
+   * Helper method to set API key value for the first API key authentication.
+   * @param apiKey the API key
+   */
+  public void setApiKey(String apiKey) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof ApiKeyAuth) {
+        ((ApiKeyAuth) auth).setApiKey(apiKey);
+        return;
+      }
+    }
+    throw new RuntimeException("No API key authentication configured!");
+  }
+
+  /**
+   * Helper method to set API key prefix for the first API key authentication.
+   * @param apiKeyPrefix API key prefix
+   */
+  public void setApiKeyPrefix(String apiKeyPrefix) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof ApiKeyAuth) {
+        ((ApiKeyAuth) auth).setApiKeyPrefix(apiKeyPrefix);
+        return;
+      }
+    }
+    throw new RuntimeException("No API key authentication configured!");
+  }
+
+
+  /**
+   * Helper method to set access token for the first OAuth2 authentication.
+   * @param accessToken Access token
+   */
+  public void setAccessToken(String accessToken) {
+    for (Authentication auth : authentications.values()) {
+      if (auth instanceof OAuth) {
+        ((OAuth) auth).setAccessToken(accessToken);
+        return;
+      }
+    }
+    throw new RuntimeException("No OAuth2 authentication configured!");
+  }
+
+
+  /**
+   * Set the User-Agent header's value (by adding to the default header map).
+   * @param userAgent User agent
+   * @return API client
+   */
+  public ApiClient setUserAgent(String userAgent) {
+    addDefaultHeader("User-Agent", userAgent);
+    return this;
+  }
+
+  /**
+   * Add a default header.
+   *
+   * @param key The header's key
+   * @param value The header's value
+   * @return API client
+   */
+  public ApiClient addDefaultHeader(String key, String value) {
+    defaultHeaderMap.put(key, value);
+    return this;
+  }
+
+  /**
+   * Add a default cookie.
+   *
+   * @param key The cookie's key
+   * @param value The cookie's value
+   * @return API client
+   */
+  public ApiClient addDefaultCookie(String key, String value) {
+    defaultCookieMap.put(key, value);
+    return this;
+  }
+
+  /**
+   * Check that whether debugging is enabled for this API client.
+   * @return True if debugging is on
+   */
+  public boolean isDebugging() {
+    return debugging;
+  }
+
+  /**
+   * Enable/disable debugging for this API client.
+   *
+   * @param debugging To enable (true) or disable (false) debugging
+   * @return API client
+   */
+  public ApiClient setDebugging(boolean debugging) {
+    this.debugging = debugging;
+    // Need to rebuild the Client as it depends on the value of debugging.
+    rebuildHttpClient();
+    return this;
+  }
+
+  /**
+   * Connect timeout (in milliseconds).
+   * @return Connection timeout
+   */
+  public int getConnectTimeout() {
+    return connectionTimeout;
+  }
+
+  /**
+   * Set the connect timeout (in milliseconds).
+   * A value of 0 means no timeout, otherwise values must be between 1 and
+   * {@link Integer#MAX_VALUE}.
+   * @param connectionTimeout Connection timeout in milliseconds
+   * @return API client
+   */
+   public ApiClient setConnectTimeout(int connectionTimeout) {
+     this.connectionTimeout = connectionTimeout;
+     httpClient.setConnectTimeout(connectionTimeout);
+     return this;
+   }
+
+  /**
+   * Get the date format used to parse/format date parameters.
+   * @return Date format
+   */
+  public DateFormat getDateFormat() {
+    return dateFormat;
+  }
+
+  /**
+   * Set the date format used to parse/format date parameters.
+   * @param dateFormat Date format
+   * @return API client
+   */
+  public ApiClient setDateFormat(DateFormat dateFormat) {
+    this.dateFormat = dateFormat;
+    // Also set the date format for model (de)serialization with Date properties.
+    this.objectMapper.setDateFormat((DateFormat) dateFormat.clone());
+    // Need to rebuild the Client as objectMapper changes.
+    rebuildHttpClient();
+    return this;
+  }
+
+  /**
+   * Parse the given string into Date object.
+   * @param str String
+   * @return Date
+   */
+  public Date parseDate(String str) {
+    try {
+      return dateFormat.parse(str);
+    } catch (java.text.ParseException e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  /**
+   * Format the given Date object into string.
+   * @param date Date
+   * @return Date in string format
+   */
+  public String formatDate(Date date) {
+    return dateFormat.format(date);
+  }
+
+  /**
+   * Format the given parameter object into string.
+   * @param param Object
+   * @return Object in string format
+   */
+  public String parameterToString(Object param) {
+    if (param == null) {
+      return "";
+    } else if (param instanceof Date) {
+      return formatDate((Date) param);
+    } else if (param instanceof OffsetDateTime) {
+      return formatOffsetDateTime((OffsetDateTime) param);
+    } else if (param instanceof Collection) {
+      StringBuilder b = new StringBuilder();
+      for(Object o : (Collection<?>)param) {
+        if(b.length() > 0) {
+          b.append(',');
+        }
+        b.append(String.valueOf(o));
+      }
+      return b.toString();
+    } else {
+      return String.valueOf(param);
+    }
+  }
+
+  /**
+   * Formats the specified query parameter to a list containing a single {@code Pair} object.
+   *
+   * Note that {@code value} must not be a collection.
+   *
+   * @param name The name of the parameter.
+   * @param value The value of the parameter.
+   * @return A list containing a single {@code Pair} object.
+   */
+  public List<Pair> parameterToPair(String name, Object value) {
+    List<Pair> params = new ArrayList<Pair>();
+
+    // preconditions
+    if (name == null || name.isEmpty() || value == null || value instanceof Collection) return params;
+
+    params.add(new Pair(name, parameterToString(value)));
+    return params;
+  }
+
+  /**
+   * Formats the specified collection query parameters to a list of {@code Pair} objects.
+   *
+   * Note that the values of each of the returned Pair objects are percent-encoded.
+   *
+   * @param collectionFormat The collection format of the parameter.
+   * @param name The name of the parameter.
+   * @param value The value of the parameter.
+   * @return A list of {@code Pair} objects.
+   */
+  public List<Pair> parameterToPairs(String collectionFormat, String name, Collection value) {
+    List<Pair> params = new ArrayList<Pair>();
+
+    // preconditions
+    if (name == null || name.isEmpty() || value == null) {
+      return params;
+    }
+
+    // create the params based on the collection format
+    if ("multi".equals(collectionFormat)) {
+      for (Object item : value) {
+        params.add(new Pair(name, escapeString(parameterToString(item))));
+      }
+      return params;
+    }
+
+    // collectionFormat is assumed to be "csv" by default
+    String delimiter = ",";
+
+    // escape all delimiters except commas, which are URI reserved
+    // characters
+    if ("ssv".equals(collectionFormat)) {
+      delimiter = escapeString(" ");
+    } else if ("tsv".equals(collectionFormat)) {
+      delimiter = escapeString("\t");
+    } else if ("pipes".equals(collectionFormat)) {
+      delimiter = escapeString("|");
+    }
+
+    StringBuilder sb = new StringBuilder() ;
+    for (Object item : value) {
+      sb.append(delimiter);
+      sb.append(escapeString(parameterToString(item)));
+    }
+
+    params.add(new Pair(name, sb.substring(delimiter.length())));
+
+    return params;
+  }
+
+  /**
+   * Check if the given MIME is a JSON MIME.
+   * JSON MIME examples:
+   *   application/json
+   *   application/json; charset=UTF8
+   *   APPLICATION/JSON
+   *   application/vnd.company+json
+   * @param mime MIME
+   * @return True if MIME type is boolean
+   */
+  public boolean isJsonMime(String mime) {
+    String jsonMime = "(?i)^(application/json|[^;/ \t]+/[^;/ \t]+[+]json)[ \t]*(;.*)?$";
+    return mime != null && (mime.matches(jsonMime) || mime.equals("*/*"));
+  }
+
+  /**
+   * Select the Accept header's value from the given accepts array:
+   *   if JSON exists in the given array, use it;
+   *   otherwise use all of them (joining into a string)
+   *
+   * @param accepts The accepts array to select from
+   * @return The Accept header to use. If the given array is empty,
+   *   null will be returned (not to set the Accept header explicitly).
+   */
+  public String selectHeaderAccept(String[] accepts) {
+    if (accepts.length == 0) {
+      return null;
+    }
+    for (String accept : accepts) {
+      if (isJsonMime(accept)) {
+        return accept;
+      }
+    }
+    return StringUtil.join(accepts, ",");
+  }
+
+  /**
+   * Select the Content-Type header's value from the given array:
+   *   if JSON exists in the given array, use it;
+   *   otherwise use the first one of the array.
+   *
+   * @param contentTypes The Content-Type array to select from
+   * @return The Content-Type header to use. If the given array is empty,
+   *   or matches "any", JSON will be used.
+   */
+  public String selectHeaderContentType(String[] contentTypes) {
+    if (contentTypes.length == 0 || contentTypes[0].equals("*/*")) {
+      return "application/json";
+    }
+    for (String contentType : contentTypes) {
+      if (isJsonMime(contentType)) {
+        return contentType;
+      }
+    }
+    return contentTypes[0];
+  }
+
+  /**
+   * Escape the given string to be used as URL query value.
+   * @param str String
+   * @return Escaped string
+   */
+  public String escapeString(String str) {
+    try {
+      return URLEncoder.encode(str, "utf8").replaceAll("\\+", "%20");
+    } catch (UnsupportedEncodingException e) {
+      return str;
+    }
+  }
+
+  /**
+   * Serialize the given Java object into string according the given
+   * Content-Type (only JSON is supported for now).
+   * @param obj Object
+   * @param contentType Content type
+   * @param formParams Form parameters
+   * @return Object
+   * @throws ApiException API exception
+   */
+  public Object serialize(Object obj, String contentType, Map<String, Object> formParams) throws ApiException {
+    if (contentType.startsWith("multipart/form-data")) {
+      FormDataMultiPart mp = new FormDataMultiPart();
+      for (Entry<String, Object> param: formParams.entrySet()) {
+        if( param.getValue() instanceof List && !( ( List ) param.getValue() ).isEmpty()
+                  && ( ( List ) param.getValue() ).get( 0 ) instanceof File ) {
+            @SuppressWarnings( "unchecked" )
+            List<File> files = ( List<File> ) param.getValue();
+            for( File file : files ) {
+              mp.bodyPart( new FileDataBodyPart( param.getKey(), file, MediaType.APPLICATION_OCTET_STREAM_TYPE ) );
+            }
+        } else if (param.getValue() instanceof File) {
+          File file = (File) param.getValue();
+          mp.bodyPart(new FileDataBodyPart(param.getKey(), file, MediaType.APPLICATION_OCTET_STREAM_TYPE));
+        } else {
+          mp.field(param.getKey(), parameterToString(param.getValue()), MediaType.MULTIPART_FORM_DATA_TYPE);
+        }
+      }
+      return mp;
+    } else if (contentType.startsWith("application/x-www-form-urlencoded")) {
+      return this.getXWWWFormUrlencodedParams(formParams);
+    } else {
+      // We let Jersey attempt to serialize the body
+      return obj;
+    }
+  }
+
+  /**
+   * Build full URL by concatenating base path, the given sub path and query parameters.
+   *
+   * @param path The sub path
+   * @param queryParams The query parameters
+   * @param collectionQueryParams The collection query parameters
+   * @return The full URL
+   */
+  private String buildUrl(String path, List<Pair> queryParams, List<Pair> collectionQueryParams) {
+    String baseURL;
+    if (serverIndex != null) {
+      if (serverIndex < 0 || serverIndex >= servers.size()) {
+        throw new ArrayIndexOutOfBoundsException(String.format(
+          "Invalid index %d when selecting the host settings. Must be less than %d", serverIndex, servers.size()
+        ));
+      }
+      baseURL = servers.get(serverIndex).URL(serverVariables);
+    } else {
+      baseURL = basePath;
+    }
+
+    final StringBuilder url = new StringBuilder();
+    url.append(baseURL).append(path);
+
+    if (queryParams != null && !queryParams.isEmpty()) {
+      // support (constant) query string in `path`, e.g. "/posts?draft=1"
+      String prefix = path.contains("?") ? "&" : "?";
+      for (Pair param : queryParams) {
+        if (param.getValue() != null) {
+          if (prefix != null) {
+            url.append(prefix);
+            prefix = null;
+          } else {
+            url.append("&");
+          }
+          String value = parameterToString(param.getValue());
+          url.append(escapeString(param.getName())).append("=").append(escapeString(value));
+        }
+      }
+    }
+
+    if (collectionQueryParams != null && !collectionQueryParams.isEmpty()) {
+      String prefix = url.toString().contains("?") ? "&" : "?";
+      for (Pair param : collectionQueryParams) {
+        if (param.getValue() != null) {
+          if (prefix != null) {
+            url.append(prefix);
+            prefix = null;
+          } else {
+            url.append("&");
+          }
+          String value = parameterToString(param.getValue());
+          // collection query parameter value already escaped as part of parameterToPairs
+          url.append(escapeString(param.getName())).append("=").append(value);
+        }
+      }
+    }
+
+    return url.toString();
+  }
+
+  private ClientResponse getAPIResponse(String path, String method, List<Pair> queryParams, List<Pair> collectionQueryParams, Object body, Map<String, String> headerParams, Map<String, String> cookieParams, Map<String, Object> formParams, String accept, String contentType, String[] authNames) throws ApiException {
+    if (body != null && !formParams.isEmpty()) {
+      throw new ApiException(500, "Cannot have body and form params");
+    }
+
+    updateParamsForAuth(authNames, queryParams, headerParams, cookieParams);
+
+    final String url = buildUrl(path, queryParams, collectionQueryParams);
+    Builder builder;
+    if (accept == null) {
+      builder = httpClient.resource(url).getRequestBuilder();
+    } else {
+      builder = httpClient.resource(url).accept(accept);
+    }
+
+    for (Entry<String, String> keyValue : headerParams.entrySet()) {
+      builder = builder.header(keyValue.getKey(), keyValue.getValue());
+    }
+    for (Map.Entry<String,String> keyValue : defaultHeaderMap.entrySet()) {
+      if (!headerParams.containsKey(keyValue.getKey())) {
+        builder = builder.header(keyValue.getKey(), keyValue.getValue());
+      }
+    }
+
+    for (Entry<String, String> keyValue : cookieParams.entrySet()) {
+      builder = builder.cookie(new Cookie(keyValue.getKey(), keyValue.getValue()));
+    }
+    for (Map.Entry<String,String> keyValue : defaultCookieMap.entrySet()) {
+      if (!cookieParams.containsKey(keyValue.getKey())) {
+        builder = builder.cookie(new Cookie(keyValue.getKey(), keyValue.getValue()));
+      }
+    }
+
+    ClientResponse response = null;
+
+    if ("GET".equals(method)) {
+      response = (ClientResponse) builder.get(ClientResponse.class);
+    } else if ("POST".equals(method)) {
+      response = builder.type(contentType).post(ClientResponse.class, serialize(body, contentType, formParams));
+    } else if ("PUT".equals(method)) {
+      response = builder.type(contentType).put(ClientResponse.class, serialize(body, contentType, formParams));
+    } else if ("DELETE".equals(method)) {
+      response = builder.type(contentType).delete(ClientResponse.class, serialize(body, contentType, formParams));
+    } else if ("PATCH".equals(method)) {
+      response = builder.type(contentType).header("X-HTTP-Method-Override", "PATCH").post(ClientResponse.class, serialize(body, contentType, formParams));
+    } else if ("HEAD".equals(method)) {
+      response = builder.head();
+    } else {
+      throw new ApiException(500, "unknown method type " + method);
+    }
+    return response;
+  }
+
+  /**
+   * Invoke API by sending HTTP request with the given options.
+   *
+   * @param <T> Type
+   * @param path The sub-path of the HTTP URL
+   * @param method The request method, one of "GET", "POST", "PUT", and "DELETE"
+   * @param queryParams The query parameters
+   * @param collectionQueryParams The collection query parameters
+   * @param body The request body object - if it is not binary, otherwise null
+   * @param headerParams The header parameters
+   * @param cookieParams The cookie parameters
+   * @param formParams The form parameters
+   * @param accept The request's Accept header
+   * @param contentType The request's Content-Type header
+   * @param authNames The authentications to apply
+   * @param returnType Return type
+   * @return The response body in type of string
+   * @throws ApiException API exception
+   */
+   public <T> T invokeAPI(String path, String method, List<Pair> queryParams, List<Pair> collectionQueryParams, Object body, Map<String, String> headerParams, Map<String, String> cookieParams, Map<String, Object> formParams, String accept, String contentType, String[] authNames, GenericType<T> returnType) throws ApiException {
+
+    ClientResponse response = getAPIResponse(path, method, queryParams, collectionQueryParams, body, headerParams, cookieParams, formParams, accept, contentType, authNames);
+
+    statusCode = response.getStatusInfo().getStatusCode();
+    responseHeaders = response.getHeaders();
+
+    if(response.getStatusInfo().getStatusCode() == ClientResponse.Status.NO_CONTENT.getStatusCode()) {
+      return null;
+    } else if (response.getStatusInfo().getFamily() == Family.SUCCESSFUL) {
+      if (returnType == null)
+        return null;
+      else
+        return response.getEntity(returnType);
+    } else {
+      String message = "error";
+      String respBody = null;
+      if (response.hasEntity()) {
+        try {
+          respBody = response.getEntity(String.class);
+          message = respBody;
+        } catch (RuntimeException e) {
+          // e.printStackTrace();
+        }
+      }
+      throw new ApiException(
+        response.getStatusInfo().getStatusCode(),
+        message,
+        response.getHeaders(),
+        respBody);
+    }
+  }
+
+  /**
+   * Update query and header parameters based on authentication settings.
+   *
+   * @param authNames The authentications to apply
+   * @param queryParams Query parameters
+   * @param headerParams Header parameters
+   * @param cookieParams Cookie parameters
+   */
+  private void updateParamsForAuth(String[] authNames, List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams) {
+    for (String authName : authNames) {
+      Authentication auth = authentications.get(authName);
+      if (auth == null) throw new RuntimeException("Authentication undefined: " + authName);
+      auth.applyToParams(queryParams, headerParams, cookieParams);
+    }
+  }
+
+  /**
+   * Encode the given form parameters as request body.
+   * @param formParams Form parameters
+   * @return HTTP form encoded parameters
+   */
+  private String getXWWWFormUrlencodedParams(Map<String, Object> formParams) {
+    StringBuilder formParamBuilder = new StringBuilder();
+
+    for (Entry<String, Object> param : formParams.entrySet()) {
+      String valueStr = parameterToString(param.getValue());
+      try {
+        formParamBuilder.append(URLEncoder.encode(param.getKey(), "utf8"))
+            .append("=")
+            .append(URLEncoder.encode(valueStr, "utf8"));
+        formParamBuilder.append("&");
+      } catch (UnsupportedEncodingException e) {
+        // move on to next
+      }
+    }
+
+    String encodedFormParams = formParamBuilder.toString();
+    if (encodedFormParams.endsWith("&")) {
+      encodedFormParams = encodedFormParams.substring(0, encodedFormParams.length() - 1);
+    }
+
+    return encodedFormParams;
+  }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/ApiException.java

@@ -0,0 +1,91 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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;
+
+import java.util.Map;
+import java.util.List;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ApiException extends Exception {
+    private int code = 0;
+    private Map<String, List<String>> responseHeaders = null;
+    private String responseBody = null;
+
+    public ApiException() {}
+
+    public ApiException(Throwable throwable) {
+        super(throwable);
+    }
+
+    public ApiException(String message) {
+        super(message);
+    }
+
+    public ApiException(String message, Throwable throwable, int code, Map<String, List<String>> responseHeaders, String responseBody) {
+        super(message, throwable);
+        this.code = code;
+        this.responseHeaders = responseHeaders;
+        this.responseBody = responseBody;
+    }
+
+    public ApiException(String message, int code, Map<String, List<String>> responseHeaders, String responseBody) {
+        this(message, (Throwable) null, code, responseHeaders, responseBody);
+    }
+
+    public ApiException(String message, Throwable throwable, int code, Map<String, List<String>> responseHeaders) {
+        this(message, throwable, code, responseHeaders, null);
+    }
+
+    public ApiException(int code, Map<String, List<String>> responseHeaders, String responseBody) {
+        this((String) null, (Throwable) null, code, responseHeaders, responseBody);
+    }
+
+    public ApiException(int code, String message) {
+        super(message);
+        this.code = code;
+    }
+
+    public ApiException(int code, String message, Map<String, List<String>> responseHeaders, String responseBody) {
+        this(code, message);
+        this.responseHeaders = responseHeaders;
+        this.responseBody = responseBody;
+    }
+
+    /**
+     * Get the HTTP status code.
+     *
+     * @return HTTP status code
+     */
+    public int getCode() {
+        return code;
+    }
+
+    /**
+     * Get the HTTP response headers.
+     *
+     * @return A map of list of string
+     */
+    public Map<String, List<String>> getResponseHeaders() {
+        return responseHeaders;
+    }
+
+    /**
+     * Get the HTTP response body.
+     *
+     * @return Response body in the form of string
+     */
+    public String getResponseBody() {
+        return responseBody;
+    }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/Configuration.java

@@ -0,0 +1,39 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Configuration {
+    private static ApiClient defaultApiClient = new ApiClient();
+
+    /**
+     * Get the default API client, which would be used when creating API
+     * instances without providing an API client.
+     *
+     * @return Default API client
+     */
+    public static ApiClient getDefaultApiClient() {
+        return defaultApiClient;
+    }
+
+    /**
+     * Set the default API client, which would be used when creating API
+     * instances without providing an API client.
+     *
+     * @param apiClient API client
+     */
+    public static void setDefaultApiClient(ApiClient apiClient) {
+        defaultApiClient = apiClient;
+    }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/CustomInstantDeserializer.java

@@ -0,0 +1,232 @@
+package org.openapitools.client;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonTokenId;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.datatype.threetenbp.DecimalUtils;
+import com.fasterxml.jackson.datatype.threetenbp.deser.ThreeTenDateTimeDeserializerBase;
+import com.fasterxml.jackson.datatype.threetenbp.function.BiFunction;
+import com.fasterxml.jackson.datatype.threetenbp.function.Function;
+import org.threeten.bp.DateTimeException;
+import org.threeten.bp.DateTimeUtils;
+import org.threeten.bp.Instant;
+import org.threeten.bp.OffsetDateTime;
+import org.threeten.bp.ZoneId;
+import org.threeten.bp.ZonedDateTime;
+import org.threeten.bp.format.DateTimeFormatter;
+import org.threeten.bp.temporal.Temporal;
+import org.threeten.bp.temporal.TemporalAccessor;
+
+import java.io.IOException;
+import java.math.BigDecimal;
+
+/**
+ * Deserializer for ThreeTen temporal {@link Instant}s, {@link OffsetDateTime}, and {@link ZonedDateTime}s.
+ * Adapted from the jackson threetenbp InstantDeserializer to add support for deserializing rfc822 format.
+ *
+ * @author Nick Williams
+ */
+public class CustomInstantDeserializer<T extends Temporal>
+    extends ThreeTenDateTimeDeserializerBase<T> {
+  private static final long serialVersionUID = 1L;
+
+  public static final CustomInstantDeserializer<Instant> INSTANT = new CustomInstantDeserializer<Instant>(
+      Instant.class, DateTimeFormatter.ISO_INSTANT,
+      new Function<TemporalAccessor, Instant>() {
+        @Override
+        public Instant apply(TemporalAccessor temporalAccessor) {
+          return Instant.from(temporalAccessor);
+        }
+      },
+      new Function<FromIntegerArguments, Instant>() {
+        @Override
+        public Instant apply(FromIntegerArguments a) {
+          return Instant.ofEpochMilli(a.value);
+        }
+      },
+      new Function<FromDecimalArguments, Instant>() {
+        @Override
+        public Instant apply(FromDecimalArguments a) {
+          return Instant.ofEpochSecond(a.integer, a.fraction);
+        }
+      },
+      null
+  );
+
+  public static final CustomInstantDeserializer<OffsetDateTime> OFFSET_DATE_TIME = new CustomInstantDeserializer<OffsetDateTime>(
+      OffsetDateTime.class, DateTimeFormatter.ISO_OFFSET_DATE_TIME,
+      new Function<TemporalAccessor, OffsetDateTime>() {
+        @Override
+        public OffsetDateTime apply(TemporalAccessor temporalAccessor) {
+          return OffsetDateTime.from(temporalAccessor);
+        }
+      },
+      new Function<FromIntegerArguments, OffsetDateTime>() {
+        @Override
+        public OffsetDateTime apply(FromIntegerArguments a) {
+          return OffsetDateTime.ofInstant(Instant.ofEpochMilli(a.value), a.zoneId);
+        }
+      },
+      new Function<FromDecimalArguments, OffsetDateTime>() {
+        @Override
+        public OffsetDateTime apply(FromDecimalArguments a) {
+          return OffsetDateTime.ofInstant(Instant.ofEpochSecond(a.integer, a.fraction), a.zoneId);
+        }
+      },
+      new BiFunction<OffsetDateTime, ZoneId, OffsetDateTime>() {
+        @Override
+        public OffsetDateTime apply(OffsetDateTime d, ZoneId z) {
+          return d.withOffsetSameInstant(z.getRules().getOffset(d.toLocalDateTime()));
+        }
+      }
+  );
+
+  public static final CustomInstantDeserializer<ZonedDateTime> ZONED_DATE_TIME = new CustomInstantDeserializer<ZonedDateTime>(
+      ZonedDateTime.class, DateTimeFormatter.ISO_ZONED_DATE_TIME,
+      new Function<TemporalAccessor, ZonedDateTime>() {
+        @Override
+        public ZonedDateTime apply(TemporalAccessor temporalAccessor) {
+          return ZonedDateTime.from(temporalAccessor);
+        }
+      },
+      new Function<FromIntegerArguments, ZonedDateTime>() {
+        @Override
+        public ZonedDateTime apply(FromIntegerArguments a) {
+          return ZonedDateTime.ofInstant(Instant.ofEpochMilli(a.value), a.zoneId);
+        }
+      },
+      new Function<FromDecimalArguments, ZonedDateTime>() {
+        @Override
+        public ZonedDateTime apply(FromDecimalArguments a) {
+          return ZonedDateTime.ofInstant(Instant.ofEpochSecond(a.integer, a.fraction), a.zoneId);
+        }
+      },
+      new BiFunction<ZonedDateTime, ZoneId, ZonedDateTime>() {
+        @Override
+        public ZonedDateTime apply(ZonedDateTime zonedDateTime, ZoneId zoneId) {
+          return zonedDateTime.withZoneSameInstant(zoneId);
+        }
+      }
+  );
+
+  protected final Function<FromIntegerArguments, T> fromMilliseconds;
+
+  protected final Function<FromDecimalArguments, T> fromNanoseconds;
+
+  protected final Function<TemporalAccessor, T> parsedToValue;
+
+  protected final BiFunction<T, ZoneId, T> adjust;
+
+  protected CustomInstantDeserializer(Class<T> supportedType,
+                    DateTimeFormatter parser,
+                    Function<TemporalAccessor, T> parsedToValue,
+                    Function<FromIntegerArguments, T> fromMilliseconds,
+                    Function<FromDecimalArguments, T> fromNanoseconds,
+                    BiFunction<T, ZoneId, T> adjust) {
+    super(supportedType, parser);
+    this.parsedToValue = parsedToValue;
+    this.fromMilliseconds = fromMilliseconds;
+    this.fromNanoseconds = fromNanoseconds;
+    this.adjust = adjust == null ? new BiFunction<T, ZoneId, T>() {
+      @Override
+      public T apply(T t, ZoneId zoneId) {
+        return t;
+      }
+    } : adjust;
+  }
+
+  @SuppressWarnings("unchecked")
+  protected CustomInstantDeserializer(CustomInstantDeserializer<T> base, DateTimeFormatter f) {
+    super((Class<T>) base.handledType(), f);
+    parsedToValue = base.parsedToValue;
+    fromMilliseconds = base.fromMilliseconds;
+    fromNanoseconds = base.fromNanoseconds;
+    adjust = base.adjust;
+  }
+
+  @Override
+  protected JsonDeserializer<T> withDateFormat(DateTimeFormatter dtf) {
+    if (dtf == _formatter) {
+      return this;
+    }
+    return new CustomInstantDeserializer<T>(this, dtf);
+  }
+
+  @Override
+  public T deserialize(JsonParser parser, DeserializationContext context) throws IOException {
+    //NOTE: Timestamps contain no timezone info, and are always in configured TZ. Only
+    //string values have to be adjusted to the configured TZ.
+    switch (parser.getCurrentTokenId()) {
+      case JsonTokenId.ID_NUMBER_FLOAT: {
+        BigDecimal value = parser.getDecimalValue();
+        long seconds = value.longValue();
+        int nanoseconds = DecimalUtils.extractNanosecondDecimal(value, seconds);
+        return fromNanoseconds.apply(new FromDecimalArguments(
+            seconds, nanoseconds, getZone(context)));
+      }
+
+      case JsonTokenId.ID_NUMBER_INT: {
+        long timestamp = parser.getLongValue();
+        if (context.isEnabled(DeserializationFeature.READ_DATE_TIMESTAMPS_AS_NANOSECONDS)) {
+          return this.fromNanoseconds.apply(new FromDecimalArguments(
+              timestamp, 0, this.getZone(context)
+          ));
+        }
+        return this.fromMilliseconds.apply(new FromIntegerArguments(
+            timestamp, this.getZone(context)
+        ));
+      }
+
+      case JsonTokenId.ID_STRING: {
+        String string = parser.getText().trim();
+        if (string.length() == 0) {
+          return null;
+        }
+        if (string.endsWith("+0000")) {
+          string = string.substring(0, string.length() - 5) + "Z";
+        }
+        T value;
+        try {
+          TemporalAccessor acc = _formatter.parse(string);
+          value = parsedToValue.apply(acc);
+          if (context.isEnabled(DeserializationFeature.ADJUST_DATES_TO_CONTEXT_TIME_ZONE)) {
+            return adjust.apply(value, this.getZone(context));
+          }
+        } catch (DateTimeException e) {
+          throw _peelDTE(e);
+        }
+        return value;
+      }
+    }
+    throw context.mappingException("Expected type float, integer, or string.");
+  }
+
+  private ZoneId getZone(DeserializationContext context) {
+    // Instants are always in UTC, so don't waste compute cycles
+    return (_valueClass == Instant.class) ? null : DateTimeUtils.toZoneId(context.getTimeZone());
+  }
+
+  private static class FromIntegerArguments {
+    public final long value;
+    public final ZoneId zoneId;
+
+    private FromIntegerArguments(long value, ZoneId zoneId) {
+      this.value = value;
+      this.zoneId = zoneId;
+    }
+  }
+
+  private static class FromDecimalArguments {
+    public final long integer;
+    public final int fraction;
+    public final ZoneId zoneId;
+
+    private FromDecimalArguments(long integer, int fraction, ZoneId zoneId) {
+      this.integer = integer;
+      this.fraction = fraction;
+      this.zoneId = zoneId;
+    }
+  }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/JavaTimeFormatter.java

@@ -0,0 +1,64 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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;
+
+import org.threeten.bp.OffsetDateTime;
+import org.threeten.bp.format.DateTimeFormatter;
+import org.threeten.bp.format.DateTimeParseException;
+
+/**
+ * Class that add parsing/formatting support for Java 8+ {@code OffsetDateTime} class.
+ * It's generated for java clients when {@code AbstractJavaCodegen#dateLibrary} specified as {@code java8}.
+ */
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class JavaTimeFormatter {
+
+    private DateTimeFormatter offsetDateTimeFormatter = DateTimeFormatter.ISO_OFFSET_DATE_TIME;
+
+    /**
+     * Get the date format used to parse/format {@code OffsetDateTime} parameters.
+     * @return DateTimeFormatter
+     */
+    public DateTimeFormatter getOffsetDateTimeFormatter() {
+        return offsetDateTimeFormatter;
+    }
+
+    /**
+     * Set the date format used to parse/format {@code OffsetDateTime} parameters.
+     * @param offsetDateTimeFormatter {@code DateTimeFormatter}
+     */
+    public void setOffsetDateTimeFormatter(DateTimeFormatter offsetDateTimeFormatter) {
+        this.offsetDateTimeFormatter = offsetDateTimeFormatter;
+    }
+
+    /**
+     * Parse the given string into {@code OffsetDateTime} object.
+     * @param str String
+     * @return {@code OffsetDateTime}
+     */
+    public OffsetDateTime parseOffsetDateTime(String str) {
+        try {
+            return OffsetDateTime.parse(str, offsetDateTimeFormatter);
+        } catch (DateTimeParseException e) {
+            throw new RuntimeException(e);
+        }
+    }
+    /**
+     * Format the given {@code OffsetDateTime} object into string.
+     * @param offsetDateTime {@code OffsetDateTime}
+     * @return {@code OffsetDateTime} in string format
+     */
+    public String formatOffsetDateTime(OffsetDateTime offsetDateTime) {
+        return offsetDateTimeFormatter.format(offsetDateTime);
+    }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/Pair.java

@@ -0,0 +1,61 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Pair {
+    private String name = "";
+    private String value = "";
+
+    public Pair (String name, String value) {
+        setName(name);
+        setValue(value);
+    }
+
+    private void setName(String name) {
+        if (!isValidString(name)) {
+            return;
+        }
+
+        this.name = name;
+    }
+
+    private void setValue(String value) {
+        if (!isValidString(value)) {
+            return;
+        }
+
+        this.value = value;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public String getValue() {
+        return this.value;
+    }
+
+    private boolean isValidString(String arg) {
+        if (arg == null) {
+            return false;
+        }
+
+        if (arg.trim().isEmpty()) {
+            return false;
+        }
+
+        return true;
+    }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/RFC3339DateFormat.java

@@ -0,0 +1,55 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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;
+
+import com.fasterxml.jackson.databind.util.StdDateFormat;
+
+import java.text.DateFormat;
+import java.text.FieldPosition;
+import java.text.ParsePosition;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+
+public class RFC3339DateFormat extends DateFormat {
+  private static final long serialVersionUID = 1L;
+  private static final TimeZone TIMEZONE_Z = TimeZone.getTimeZone("UTC");
+
+  private final StdDateFormat fmt = new StdDateFormat()
+          .withTimeZone(TIMEZONE_Z)
+          .withColonInTimeZone(true);
+
+  public RFC3339DateFormat() {
+    this.calendar = new GregorianCalendar();
+  }
+
+  @Override
+  public Date parse(String source) {
+    return parse(source, new ParsePosition(0));
+  }
+
+  @Override
+  public Date parse(String source, ParsePosition pos) {
+    return fmt.parse(source, pos);
+  }
+
+  @Override
+  public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition) {
+    return fmt.format(date, toAppendTo, fieldPosition);
+  }
+
+  @Override
+  public Object clone() {
+    return this;
+  }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/ServerConfiguration.java

@@ -0,0 +1,58 @@
+package org.openapitools.client;
+
+import java.util.Map;
+
+/**
+ * Representing a Server configuration.
+ */
+public class ServerConfiguration {
+    public String URL;
+    public String description;
+    public Map<String, ServerVariable> variables;
+
+    /**
+     * @param URL A URL to the target host.
+     * @param description A describtion of the host designated by the URL.
+     * @param variables A map between a variable name and its value. The value is used for substitution in the server's URL template.
+     */
+    public ServerConfiguration(String URL, String description, Map<String, ServerVariable> variables) {
+        this.URL = URL;
+        this.description = description;
+        this.variables = variables;
+    }
+
+    /**
+     * Format URL template using given variables.
+     *
+     * @param variables A map between a variable name and its value.
+     * @return Formatted URL.
+     */
+    public String URL(Map<String, String> variables) {
+        String url = this.URL;
+
+        // go through variables and replace placeholders
+        for (Map.Entry<String, ServerVariable> variable: this.variables.entrySet()) {
+            String name = variable.getKey();
+            ServerVariable serverVariable = variable.getValue();
+            String value = serverVariable.defaultValue;
+
+            if (variables != null && variables.containsKey(name)) {
+                value = variables.get(name);
+                if (serverVariable.enumValues.size() > 0 && !serverVariable.enumValues.contains(value)) {
+                    throw new RuntimeException("The variable " + name + " in the server URL has invalid value " + value + ".");
+                }
+            }
+            url = url.replaceAll("\\{" + name + "\\}", value);
+        }
+        return url;
+    }
+
+    /**
+     * Format URL template using default server variables.
+     *
+     * @return Formatted URL.
+     */
+    public String URL() {
+        return URL(null);
+    }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/ServerVariable.java

@@ -0,0 +1,23 @@
+package org.openapitools.client;
+
+import java.util.HashSet;
+
+/**
+ * Representing a Server Variable for server URL template substitution.
+ */
+public class ServerVariable {
+    public String description;
+    public String defaultValue;
+    public HashSet<String> enumValues = null;
+
+    /**
+     * @param description A description for the server variable.
+     * @param defaultValue The default value to use for substitution.
+     * @param enumValues An enumeration of string values to be used if the substitution options are from a limited set.
+     */
+    public ServerVariable(String description, String defaultValue, HashSet<String> enumValues) {
+        this.description = description;
+        this.defaultValue = defaultValue;
+        this.enumValues = enumValues;
+    }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/StringUtil.java

@@ -0,0 +1,83 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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;
+
+import java.util.Collection;
+import java.util.Iterator;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class StringUtil {
+  /**
+   * Check if the given array contains the given value (with case-insensitive comparison).
+   *
+   * @param array The array
+   * @param value The value to search
+   * @return true if the array contains the value
+   */
+  public static boolean containsIgnoreCase(String[] array, String value) {
+    for (String str : array) {
+      if (value == null && str == null) {
+        return true;
+      }
+      if (value != null && value.equalsIgnoreCase(str)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * Join an array of strings with the given separator.
+   * <p>
+   * Note: This might be replaced by utility method from commons-lang or guava someday
+   * if one of those libraries is added as dependency.
+   * </p>
+   *
+   * @param array     The array of strings
+   * @param separator The separator
+   * @return the resulting string
+   */
+  public static String join(String[] array, String separator) {
+    int len = array.length;
+    if (len == 0) {
+      return "";
+    }
+
+    StringBuilder out = new StringBuilder();
+    out.append(array[0]);
+    for (int i = 1; i < len; i++) {
+      out.append(separator).append(array[i]);
+    }
+    return out.toString();
+  }
+
+  /**
+   * Join a list of strings with the given separator.
+   *
+   * @param list      The list of strings
+   * @param separator The separator
+   * @return the resulting string
+   */
+  public static String join(Collection<String> list, String separator) {
+    Iterator<String> iterator = list.iterator();
+    StringBuilder out = new StringBuilder();
+    if (iterator.hasNext()) {
+      out.append(iterator.next());
+    }
+    while (iterator.hasNext()) {
+      out.append(separator).append(iterator.next());
+    }
+    return out.toString();
+  }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/AnotherFakeApi.java

@@ -0,0 +1,95 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.sun.jersey.api.client.GenericType;
+
+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 org.openapitools.client.model.Client;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class AnotherFakeApi {
+  private ApiClient apiClient;
+
+  public AnotherFakeApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public AnotherFakeApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * To test special tags
+   * To test special tags and operation ID starting with number
+   * @param body client model (required)
+   * @return Client
+   * @throws ApiException if fails to make API call
+   */
+  public Client call123testSpecialTags(Client body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling call123testSpecialTags");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/another-fake/dummy";
+
+    // query params
+    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 = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<Client> localVarReturnType = new GenericType<Client>() {};
+    return apiClient.invokeAPI(localVarPath, "PATCH", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/FakeApi.java

@@ -0,0 +1,785 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.sun.jersey.api.client.GenericType;
+
+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.math.BigDecimal;
+import org.openapitools.client.model.Client;
+import java.io.File;
+import org.openapitools.client.model.FileSchemaTestClass;
+import org.threeten.bp.LocalDate;
+import org.threeten.bp.OffsetDateTime;
+import org.openapitools.client.model.OuterComposite;
+import org.openapitools.client.model.User;
+import org.openapitools.client.model.XmlItem;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class FakeApi {
+  private ApiClient apiClient;
+
+  public FakeApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public FakeApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * creates an XmlItem
+   * this route creates an XmlItem
+   * @param xmlItem XmlItem Body (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void createXmlItem(XmlItem xmlItem) throws ApiException {
+    Object localVarPostBody = xmlItem;
+    
+    // verify the required parameter 'xmlItem' is set
+    if (xmlItem == null) {
+      throw new ApiException(400, "Missing the required parameter 'xmlItem' when calling createXmlItem");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake/create_xml_item";
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/xml", "application/xml; charset=utf-8", "application/xml; charset=utf-16", "text/xml", "text/xml; charset=utf-8", "text/xml; charset=utf-16"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * 
+   * Test serialization of outer boolean types
+   * @param body Input boolean as post body (optional)
+   * @return Boolean
+   * @throws ApiException if fails to make API call
+   */
+  public Boolean fakeOuterBooleanSerialize(Boolean body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // create path and map variables
+    String localVarPath = "/fake/outer/boolean";
+
+    // query params
+    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 = {
+      "*/*"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<Boolean> localVarReturnType = new GenericType<Boolean>() {};
+    return apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * 
+   * Test serialization of object with outer number type
+   * @param body Input composite as post body (optional)
+   * @return OuterComposite
+   * @throws ApiException if fails to make API call
+   */
+  public OuterComposite fakeOuterCompositeSerialize(OuterComposite body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // create path and map variables
+    String localVarPath = "/fake/outer/composite";
+
+    // query params
+    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 = {
+      "*/*"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<OuterComposite> localVarReturnType = new GenericType<OuterComposite>() {};
+    return apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * 
+   * Test serialization of outer number types
+   * @param body Input number as post body (optional)
+   * @return BigDecimal
+   * @throws ApiException if fails to make API call
+   */
+  public BigDecimal fakeOuterNumberSerialize(BigDecimal body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // create path and map variables
+    String localVarPath = "/fake/outer/number";
+
+    // query params
+    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 = {
+      "*/*"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<BigDecimal> localVarReturnType = new GenericType<BigDecimal>() {};
+    return apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * 
+   * Test serialization of outer string types
+   * @param body Input string as post body (optional)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String fakeOuterStringSerialize(String body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // create path and map variables
+    String localVarPath = "/fake/outer/string";
+
+    // query params
+    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 = {
+      "*/*"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<String> localVarReturnType = new GenericType<String>() {};
+    return apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * 
+   * For this test, the body for this request much reference a schema named &#x60;File&#x60;.
+   * @param body  (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void testBodyWithFileSchema(FileSchemaTestClass body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling testBodyWithFileSchema");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake/body-with-file-schema";
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "PUT", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * 
+   * 
+   * @param query  (required)
+   * @param body  (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void testBodyWithQueryParams(String query, User body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'query' is set
+    if (query == null) {
+      throw new ApiException(400, "Missing the required parameter 'query' when calling testBodyWithQueryParams");
+    }
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling testBodyWithQueryParams");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake/body-with-query-params";
+
+    // query params
+    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>();
+
+    localVarQueryParams.addAll(apiClient.parameterToPair("query", query));
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "PUT", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * To test \&quot;client\&quot; model
+   * To test \&quot;client\&quot; model
+   * @param body client model (required)
+   * @return Client
+   * @throws ApiException if fails to make API call
+   */
+  public Client testClientModel(Client body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling testClientModel");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake";
+
+    // query params
+    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 = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<Client> localVarReturnType = new GenericType<Client>() {};
+    return apiClient.invokeAPI(localVarPath, "PATCH", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
+   * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
+   * @param number None (required)
+   * @param _double None (required)
+   * @param patternWithoutDelimiter None (required)
+   * @param _byte None (required)
+   * @param integer None (optional)
+   * @param int32 None (optional)
+   * @param int64 None (optional)
+   * @param _float None (optional)
+   * @param string None (optional)
+   * @param binary None (optional)
+   * @param date None (optional)
+   * @param dateTime None (optional)
+   * @param password None (optional)
+   * @param paramCallback None (optional)
+   * @throws ApiException if fails to make API call
+   */
+  public void testEndpointParameters(BigDecimal number, Double _double, String patternWithoutDelimiter, byte[] _byte, Integer integer, Integer int32, Long int64, Float _float, String string, File binary, LocalDate date, OffsetDateTime dateTime, String password, String paramCallback) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'number' is set
+    if (number == null) {
+      throw new ApiException(400, "Missing the required parameter 'number' when calling testEndpointParameters");
+    }
+    
+    // verify the required parameter '_double' is set
+    if (_double == null) {
+      throw new ApiException(400, "Missing the required parameter '_double' when calling testEndpointParameters");
+    }
+    
+    // verify the required parameter 'patternWithoutDelimiter' is set
+    if (patternWithoutDelimiter == null) {
+      throw new ApiException(400, "Missing the required parameter 'patternWithoutDelimiter' when calling testEndpointParameters");
+    }
+    
+    // verify the required parameter '_byte' is set
+    if (_byte == null) {
+      throw new ApiException(400, "Missing the required parameter '_byte' when calling testEndpointParameters");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake";
+
+    // query params
+    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 (integer != null)
+      localVarFormParams.put("integer", integer);
+if (int32 != null)
+      localVarFormParams.put("int32", int32);
+if (int64 != null)
+      localVarFormParams.put("int64", int64);
+if (number != null)
+      localVarFormParams.put("number", number);
+if (_float != null)
+      localVarFormParams.put("float", _float);
+if (_double != null)
+      localVarFormParams.put("double", _double);
+if (string != null)
+      localVarFormParams.put("string", string);
+if (patternWithoutDelimiter != null)
+      localVarFormParams.put("pattern_without_delimiter", patternWithoutDelimiter);
+if (_byte != null)
+      localVarFormParams.put("byte", _byte);
+if (binary != null)
+      localVarFormParams.put("binary", binary);
+if (date != null)
+      localVarFormParams.put("date", date);
+if (dateTime != null)
+      localVarFormParams.put("dateTime", dateTime);
+if (password != null)
+      localVarFormParams.put("password", password);
+if (paramCallback != null)
+      localVarFormParams.put("callback", paramCallback);
+
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/x-www-form-urlencoded"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "http_basic_test" };
+
+
+    apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * To test enum parameters
+   * To test enum parameters
+   * @param enumHeaderStringArray Header parameter enum test (string array) (optional
+   * @param enumHeaderString Header parameter enum test (string) (optional, default to -efg)
+   * @param enumQueryStringArray Query parameter enum test (string array) (optional
+   * @param enumQueryString Query parameter enum test (string) (optional, default to -efg)
+   * @param enumQueryInteger Query parameter enum test (double) (optional)
+   * @param enumQueryDouble Query parameter enum test (double) (optional)
+   * @param enumFormStringArray Form parameter enum test (string array) (optional
+   * @param enumFormString Form parameter enum test (string) (optional, default to -efg)
+   * @throws ApiException if fails to make API call
+   */
+  public void testEnumParameters(List<String> enumHeaderStringArray, String enumHeaderString, List<String> enumQueryStringArray, String enumQueryString, Integer enumQueryInteger, Double enumQueryDouble, List<String> enumFormStringArray, String enumFormString) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/fake";
+
+    // query params
+    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>();
+
+    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "enum_query_string_array", enumQueryStringArray));
+    localVarQueryParams.addAll(apiClient.parameterToPair("enum_query_string", enumQueryString));
+    localVarQueryParams.addAll(apiClient.parameterToPair("enum_query_integer", enumQueryInteger));
+    localVarQueryParams.addAll(apiClient.parameterToPair("enum_query_double", enumQueryDouble));
+
+    if (enumHeaderStringArray != null)
+      localVarHeaderParams.put("enum_header_string_array", apiClient.parameterToString(enumHeaderStringArray));
+if (enumHeaderString != null)
+      localVarHeaderParams.put("enum_header_string", apiClient.parameterToString(enumHeaderString));
+
+    
+    if (enumFormStringArray != null)
+      localVarFormParams.put("enum_form_string_array", enumFormStringArray);
+if (enumFormString != null)
+      localVarFormParams.put("enum_form_string", enumFormString);
+
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/x-www-form-urlencoded"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * Fake endpoint to test group parameters (optional)
+   * Fake endpoint to test group parameters (optional)
+   * @param requiredStringGroup Required String in group parameters (required)
+   * @param requiredBooleanGroup Required Boolean in group parameters (required)
+   * @param requiredInt64Group Required Integer in group parameters (required)
+   * @param stringGroup String in group parameters (optional)
+   * @param booleanGroup Boolean in group parameters (optional)
+   * @param int64Group Integer in group parameters (optional)
+   * @throws ApiException if fails to make API call
+   */
+  public void testGroupParameters(Integer requiredStringGroup, Boolean requiredBooleanGroup, Long requiredInt64Group, Integer stringGroup, Boolean booleanGroup, Long int64Group) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'requiredStringGroup' is set
+    if (requiredStringGroup == null) {
+      throw new ApiException(400, "Missing the required parameter 'requiredStringGroup' when calling testGroupParameters");
+    }
+    
+    // verify the required parameter 'requiredBooleanGroup' is set
+    if (requiredBooleanGroup == null) {
+      throw new ApiException(400, "Missing the required parameter 'requiredBooleanGroup' when calling testGroupParameters");
+    }
+    
+    // verify the required parameter 'requiredInt64Group' is set
+    if (requiredInt64Group == null) {
+      throw new ApiException(400, "Missing the required parameter 'requiredInt64Group' when calling testGroupParameters");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake";
+
+    // query params
+    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>();
+
+    localVarQueryParams.addAll(apiClient.parameterToPair("required_string_group", requiredStringGroup));
+    localVarQueryParams.addAll(apiClient.parameterToPair("required_int64_group", requiredInt64Group));
+    localVarQueryParams.addAll(apiClient.parameterToPair("string_group", stringGroup));
+    localVarQueryParams.addAll(apiClient.parameterToPair("int64_group", int64Group));
+
+    if (requiredBooleanGroup != null)
+      localVarHeaderParams.put("required_boolean_group", apiClient.parameterToString(requiredBooleanGroup));
+if (booleanGroup != null)
+      localVarHeaderParams.put("boolean_group", apiClient.parameterToString(booleanGroup));
+
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "DELETE", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * test inline additionalProperties
+   * 
+   * @param param request body (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void testInlineAdditionalProperties(Map<String, String> param) throws ApiException {
+    Object localVarPostBody = param;
+    
+    // verify the required parameter 'param' is set
+    if (param == null) {
+      throw new ApiException(400, "Missing the required parameter 'param' when calling testInlineAdditionalProperties");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake/inline-additionalProperties";
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * test json serialization of form data
+   * 
+   * @param param field1 (required)
+   * @param param2 field2 (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void testJsonFormData(String param, String param2) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'param' is set
+    if (param == null) {
+      throw new ApiException(400, "Missing the required parameter 'param' when calling testJsonFormData");
+    }
+    
+    // verify the required parameter 'param2' is set
+    if (param2 == null) {
+      throw new ApiException(400, "Missing the required parameter 'param2' when calling testJsonFormData");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake/jsonFormData";
+
+    // query params
+    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 (param != null)
+      localVarFormParams.put("param", param);
+if (param2 != null)
+      localVarFormParams.put("param2", param2);
+
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/x-www-form-urlencoded"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * 
+   * To test the collection format in query parameters
+   * @param pipe  (required)
+   * @param ioutil  (required)
+   * @param http  (required)
+   * @param url  (required)
+   * @param context  (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void testQueryParameterCollectionFormat(List<String> pipe, List<String> ioutil, List<String> http, List<String> url, List<String> context) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'pipe' is set
+    if (pipe == null) {
+      throw new ApiException(400, "Missing the required parameter 'pipe' when calling testQueryParameterCollectionFormat");
+    }
+    
+    // verify the required parameter 'ioutil' is set
+    if (ioutil == null) {
+      throw new ApiException(400, "Missing the required parameter 'ioutil' when calling testQueryParameterCollectionFormat");
+    }
+    
+    // verify the required parameter 'http' is set
+    if (http == null) {
+      throw new ApiException(400, "Missing the required parameter 'http' when calling testQueryParameterCollectionFormat");
+    }
+    
+    // verify the required parameter 'url' is set
+    if (url == null) {
+      throw new ApiException(400, "Missing the required parameter 'url' when calling testQueryParameterCollectionFormat");
+    }
+    
+    // verify the required parameter 'context' is set
+    if (context == null) {
+      throw new ApiException(400, "Missing the required parameter 'context' when calling testQueryParameterCollectionFormat");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake/test-query-paramters";
+
+    // query params
+    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>();
+
+    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "pipe", pipe));
+    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "ioutil", ioutil));
+    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("ssv", "http", http));
+    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "url", url));
+    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("multi", "context", context));
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "PUT", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java

@@ -0,0 +1,95 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.sun.jersey.api.client.GenericType;
+
+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 org.openapitools.client.model.Client;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class FakeClassnameTags123Api {
+  private ApiClient apiClient;
+
+  public FakeClassnameTags123Api() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public FakeClassnameTags123Api(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * To test class name in snake case
+   * To test class name in snake case
+   * @param body client model (required)
+   * @return Client
+   * @throws ApiException if fails to make API call
+   */
+  public Client testClassname(Client body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling testClassname");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake_classname_test";
+
+    // query params
+    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 = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "api_key_query" };
+
+    GenericType<Client> localVarReturnType = new GenericType<Client>() {};
+    return apiClient.invokeAPI(localVarPath, "PATCH", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/PetApi.java

@@ -0,0 +1,481 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.sun.jersey.api.client.GenericType;
+
+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.io.File;
+import org.openapitools.client.model.ModelApiResponse;
+import org.openapitools.client.model.Pet;
+import java.util.Set;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class PetApi {
+  private ApiClient apiClient;
+
+  public PetApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public PetApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Add a new pet to the store
+   * 
+   * @param body Pet object that needs to be added to the store (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void addPet(Pet body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling addPet");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet";
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json", "application/xml"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+
+    apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * Deletes a pet
+   * 
+   * @param petId Pet id to delete (required)
+   * @param apiKey  (optional)
+   * @throws ApiException if fails to make API call
+   */
+  public void deletePet(Long petId, String apiKey) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'petId' is set
+    if (petId == null) {
+      throw new ApiException(400, "Missing the required parameter 'petId' when calling deletePet");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/{petId}"
+      .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+    // query params
+    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 (apiKey != null)
+      localVarHeaderParams.put("api_key", apiClient.parameterToString(apiKey));
+
+    
+    
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+
+    apiClient.invokeAPI(localVarPath, "DELETE", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * Finds Pets by status
+   * Multiple status values can be provided with comma separated strings
+   * @param status Status values that need to be considered for filter (required)
+   * @return List&lt;Pet&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public List<Pet> findPetsByStatus(List<String> status) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'status' is set
+    if (status == null) {
+      throw new ApiException(400, "Missing the required parameter 'status' when calling findPetsByStatus");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/findByStatus";
+
+    // query params
+    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>();
+
+    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "status", status));
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+    GenericType<List<Pet>> localVarReturnType = new GenericType<List<Pet>>() {};
+    return apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * Finds Pets by tags
+   * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+   * @param tags Tags to filter by (required)
+   * @return Set&lt;Pet&gt;
+   * @throws ApiException if fails to make API call
+   * @deprecated
+   */
+  @Deprecated
+  public Set<Pet> findPetsByTags(Set<String> tags) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'tags' is set
+    if (tags == null) {
+      throw new ApiException(400, "Missing the required parameter 'tags' when calling findPetsByTags");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/findByTags";
+
+    // query params
+    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>();
+
+    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "tags", tags));
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+    GenericType<Set<Pet>> localVarReturnType = new GenericType<Set<Pet>>() {};
+    return apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * Find pet by ID
+   * Returns a single pet
+   * @param petId ID of pet to return (required)
+   * @return Pet
+   * @throws ApiException if fails to make API call
+   */
+  public Pet getPetById(Long petId) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'petId' is set
+    if (petId == null) {
+      throw new ApiException(400, "Missing the required parameter 'petId' when calling getPetById");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/{petId}"
+      .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+    // query params
+    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 = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "api_key" };
+
+    GenericType<Pet> localVarReturnType = new GenericType<Pet>() {};
+    return apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * Update an existing pet
+   * 
+   * @param body Pet object that needs to be added to the store (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void updatePet(Pet body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling updatePet");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet";
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/json", "application/xml"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+
+    apiClient.invokeAPI(localVarPath, "PUT", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * Updates a pet in the store with form data
+   * 
+   * @param petId ID of pet that needs to be updated (required)
+   * @param name Updated name of the pet (optional)
+   * @param status Updated status of the pet (optional)
+   * @throws ApiException if fails to make API call
+   */
+  public void updatePetWithForm(Long petId, String name, String status) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'petId' is set
+    if (petId == null) {
+      throw new ApiException(400, "Missing the required parameter 'petId' when calling updatePetWithForm");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/{petId}"
+      .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+    // query params
+    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 (name != null)
+      localVarFormParams.put("name", name);
+if (status != null)
+      localVarFormParams.put("status", status);
+
+    final String[] localVarAccepts = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "application/x-www-form-urlencoded"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+
+    apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * uploads an image
+   * 
+   * @param petId ID of pet to update (required)
+   * @param additionalMetadata Additional data to pass to server (optional)
+   * @param file file to upload (optional)
+   * @return ModelApiResponse
+   * @throws ApiException if fails to make API call
+   */
+  public ModelApiResponse uploadFile(Long petId, String additionalMetadata, File file) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'petId' is set
+    if (petId == null) {
+      throw new ApiException(400, "Missing the required parameter 'petId' when calling uploadFile");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/pet/{petId}/uploadImage"
+      .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+    // query params
+    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 (additionalMetadata != null)
+      localVarFormParams.put("additionalMetadata", additionalMetadata);
+if (file != null)
+      localVarFormParams.put("file", file);
+
+    final String[] localVarAccepts = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "multipart/form-data"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+    GenericType<ModelApiResponse> localVarReturnType = new GenericType<ModelApiResponse>() {};
+    return apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * uploads an image (required)
+   * 
+   * @param petId ID of pet to update (required)
+   * @param requiredFile file to upload (required)
+   * @param additionalMetadata Additional data to pass to server (optional)
+   * @return ModelApiResponse
+   * @throws ApiException if fails to make API call
+   */
+  public ModelApiResponse uploadFileWithRequiredFile(Long petId, File requiredFile, String additionalMetadata) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'petId' is set
+    if (petId == null) {
+      throw new ApiException(400, "Missing the required parameter 'petId' when calling uploadFileWithRequiredFile");
+    }
+    
+    // verify the required parameter 'requiredFile' is set
+    if (requiredFile == null) {
+      throw new ApiException(400, "Missing the required parameter 'requiredFile' when calling uploadFileWithRequiredFile");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/fake/{petId}/uploadImageWithRequiredFile"
+      .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+    // query params
+    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 (additionalMetadata != null)
+      localVarFormParams.put("additionalMetadata", additionalMetadata);
+if (requiredFile != null)
+      localVarFormParams.put("requiredFile", requiredFile);
+
+    final String[] localVarAccepts = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      "multipart/form-data"
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "petstore_auth" };
+
+    GenericType<ModelApiResponse> localVarReturnType = new GenericType<ModelApiResponse>() {};
+    return apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/StoreApi.java

@@ -0,0 +1,222 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.sun.jersey.api.client.GenericType;
+
+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 org.openapitools.client.model.Order;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class StoreApi {
+  private ApiClient apiClient;
+
+  public StoreApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public StoreApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Delete purchase order by ID
+   * For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors
+   * @param orderId ID of the order that needs to be deleted (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void deleteOrder(String orderId) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'orderId' is set
+    if (orderId == null) {
+      throw new ApiException(400, "Missing the required parameter 'orderId' when calling deleteOrder");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/store/order/{order_id}"
+      .replaceAll("\\{" + "order_id" + "\\}", apiClient.escapeString(orderId.toString()));
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "DELETE", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * Returns pet inventories by status
+   * Returns a map of status codes to quantities
+   * @return Map&lt;String, Integer&gt;
+   * @throws ApiException if fails to make API call
+   */
+  public Map<String, Integer> getInventory() throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/store/inventory";
+
+    // query params
+    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 = {
+      "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] { "api_key" };
+
+    GenericType<Map<String, Integer>> localVarReturnType = new GenericType<Map<String, Integer>>() {};
+    return apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * Find purchase order by ID
+   * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generated exceptions
+   * @param orderId ID of pet that needs to be fetched (required)
+   * @return Order
+   * @throws ApiException if fails to make API call
+   */
+  public Order getOrderById(Long orderId) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'orderId' is set
+    if (orderId == null) {
+      throw new ApiException(400, "Missing the required parameter 'orderId' when calling getOrderById");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/store/order/{order_id}"
+      .replaceAll("\\{" + "order_id" + "\\}", apiClient.escapeString(orderId.toString()));
+
+    // query params
+    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 = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<Order> localVarReturnType = new GenericType<Order>() {};
+    return apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * Place an order for a pet
+   * 
+   * @param body order placed for purchasing the pet (required)
+   * @return Order
+   * @throws ApiException if fails to make API call
+   */
+  public Order placeOrder(Order body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling placeOrder");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/store/order";
+
+    // query params
+    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 = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<Order> localVarReturnType = new GenericType<Order>() {};
+    return apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/api/UserApi.java

@@ -0,0 +1,408 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.sun.jersey.api.client.GenericType;
+
+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 org.openapitools.client.model.User;
+
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class UserApi {
+  private ApiClient apiClient;
+
+  public UserApi() {
+    this(Configuration.getDefaultApiClient());
+  }
+
+  public UserApi(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  public ApiClient getApiClient() {
+    return apiClient;
+  }
+
+  public void setApiClient(ApiClient apiClient) {
+    this.apiClient = apiClient;
+  }
+
+  /**
+   * Create user
+   * This can only be done by the logged in user.
+   * @param body Created user object (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void createUser(User body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling createUser");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user";
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * Creates list of users with given input array
+   * 
+   * @param body List of user object (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void createUsersWithArrayInput(List<User> body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling createUsersWithArrayInput");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/createWithArray";
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * Creates list of users with given input array
+   * 
+   * @param body List of user object (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void createUsersWithListInput(List<User> body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling createUsersWithListInput");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/createWithList";
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "POST", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * Delete user
+   * This can only be done by the logged in user.
+   * @param username The name that needs to be deleted (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void deleteUser(String username) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'username' is set
+    if (username == null) {
+      throw new ApiException(400, "Missing the required parameter 'username' when calling deleteUser");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/{username}"
+      .replaceAll("\\{" + "username" + "\\}", apiClient.escapeString(username.toString()));
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "DELETE", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * Get user by user name
+   * 
+   * @param username The name that needs to be fetched. Use user1 for testing. (required)
+   * @return User
+   * @throws ApiException if fails to make API call
+   */
+  public User getUserByName(String username) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'username' is set
+    if (username == null) {
+      throw new ApiException(400, "Missing the required parameter 'username' when calling getUserByName");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/{username}"
+      .replaceAll("\\{" + "username" + "\\}", apiClient.escapeString(username.toString()));
+
+    // query params
+    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 = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<User> localVarReturnType = new GenericType<User>() {};
+    return apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * Logs user into the system
+   * 
+   * @param username The user name for login (required)
+   * @param password The password for login in clear text (required)
+   * @return String
+   * @throws ApiException if fails to make API call
+   */
+  public String loginUser(String username, String password) throws ApiException {
+    Object localVarPostBody = null;
+    
+    // verify the required parameter 'username' is set
+    if (username == null) {
+      throw new ApiException(400, "Missing the required parameter 'username' when calling loginUser");
+    }
+    
+    // verify the required parameter 'password' is set
+    if (password == null) {
+      throw new ApiException(400, "Missing the required parameter 'password' when calling loginUser");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/login";
+
+    // query params
+    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>();
+
+    localVarQueryParams.addAll(apiClient.parameterToPair("username", username));
+    localVarQueryParams.addAll(apiClient.parameterToPair("password", password));
+
+    
+    
+    
+    final String[] localVarAccepts = {
+      "application/xml", "application/json"
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+    GenericType<String> localVarReturnType = new GenericType<String>() {};
+    return apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, localVarReturnType);
+      }
+  /**
+   * Logs out current logged in user session
+   * 
+   * @throws ApiException if fails to make API call
+   */
+  public void logoutUser() throws ApiException {
+    Object localVarPostBody = null;
+    
+    // create path and map variables
+    String localVarPath = "/user/logout";
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "GET", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+  /**
+   * Updated user
+   * This can only be done by the logged in user.
+   * @param username name that need to be deleted (required)
+   * @param body Updated user object (required)
+   * @throws ApiException if fails to make API call
+   */
+  public void updateUser(String username, User body) throws ApiException {
+    Object localVarPostBody = body;
+    
+    // verify the required parameter 'username' is set
+    if (username == null) {
+      throw new ApiException(400, "Missing the required parameter 'username' when calling updateUser");
+    }
+    
+    // verify the required parameter 'body' is set
+    if (body == null) {
+      throw new ApiException(400, "Missing the required parameter 'body' when calling updateUser");
+    }
+    
+    // create path and map variables
+    String localVarPath = "/user/{username}"
+      .replaceAll("\\{" + "username" + "\\}", apiClient.escapeString(username.toString()));
+
+    // query params
+    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 = {
+      
+    };
+    final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+
+    final String[] localVarContentTypes = {
+      
+    };
+    final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+
+    String[] localVarAuthNames = new String[] {  };
+
+
+    apiClient.invokeAPI(localVarPath, "PUT", localVarQueryParams, localVarCollectionQueryParams, localVarPostBody, localVarHeaderParams, localVarCookieParams, localVarFormParams, localVarAccept, localVarContentType, localVarAuthNames, null);
+  }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/auth/ApiKeyAuth.java

@@ -0,0 +1,77 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.auth;
+
+import org.openapitools.client.Pair;
+
+import java.util.Map;
+import java.util.List;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ApiKeyAuth implements Authentication {
+  private final String location;
+  private final String paramName;
+
+  private String apiKey;
+  private String apiKeyPrefix;
+
+  public ApiKeyAuth(String location, String paramName) {
+    this.location = location;
+    this.paramName = paramName;
+  }
+
+  public String getLocation() {
+    return location;
+  }
+
+  public String getParamName() {
+    return paramName;
+  }
+
+  public String getApiKey() {
+    return apiKey;
+  }
+
+  public void setApiKey(String apiKey) {
+    this.apiKey = apiKey;
+  }
+
+  public String getApiKeyPrefix() {
+    return apiKeyPrefix;
+  }
+
+  public void setApiKeyPrefix(String apiKeyPrefix) {
+    this.apiKeyPrefix = apiKeyPrefix;
+  }
+
+  @Override
+  public void applyToParams(List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams) {
+    if (apiKey == null) {
+      return;
+    }
+    String value;
+    if (apiKeyPrefix != null) {
+      value = apiKeyPrefix + " " + apiKey;
+    } else {
+      value = apiKey;
+    }
+    if ("query".equals(location)) {
+      queryParams.add(new Pair(paramName, value));
+    } else if ("header".equals(location)) {
+      headerParams.put(paramName, value);
+    } else if ("cookie".equals(location)) {
+      cookieParams.put(paramName, value);
+    }
+  }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/auth/Authentication.java

@@ -0,0 +1,30 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.auth;
+
+import org.openapitools.client.Pair;
+
+import java.util.Map;
+import java.util.List;
+
+public interface Authentication {
+    /**
+     * Apply authentication settings to header and query params.
+     *
+     * @param queryParams List of query parameters
+     * @param headerParams Map of header parameters
+     * @param cookieParams Map of cookie parameters
+     */
+    void applyToParams(List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams);
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/auth/HttpBasicAuth.java

@@ -0,0 +1,54 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.auth;
+
+import org.openapitools.client.Pair;
+
+import java.util.Base64;
+import java.nio.charset.StandardCharsets;
+
+import java.util.Map;
+import java.util.List;
+
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class HttpBasicAuth implements Authentication {
+  private String username;
+  private String password;
+
+  public String getUsername() {
+    return username;
+  }
+
+  public void setUsername(String username) {
+    this.username = username;
+  }
+
+  public String getPassword() {
+    return password;
+  }
+
+  public void setPassword(String password) {
+    this.password = password;
+  }
+
+  @Override
+  public void applyToParams(List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams) {
+    if (username == null && password == null) {
+      return;
+    }
+    String str = (username == null ? "" : username) + ":" + (password == null ? "" : password);
+    headerParams.put("Authorization", "Basic " + Base64.getEncoder().encodeToString(str.getBytes(StandardCharsets.UTF_8)));
+  }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/auth/HttpBearerAuth.java

@@ -0,0 +1,60 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.auth;
+
+import org.openapitools.client.Pair;
+
+import java.util.Map;
+import java.util.List;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class HttpBearerAuth implements Authentication {
+  private final String scheme;
+  private String bearerToken;
+
+  public HttpBearerAuth(String scheme) {
+    this.scheme = scheme;
+  }
+
+  /**
+   * Gets the token, which together with the scheme, will be sent as the value of the Authorization header.
+   *
+   * @return The bearer token
+   */
+  public String getBearerToken() {
+    return bearerToken;
+  }
+
+  /**
+   * Sets the token, which together with the scheme, will be sent as the value of the Authorization header.
+   *
+   * @param bearerToken The bearer token to send in the Authorization header
+   */
+  public void setBearerToken(String bearerToken) {
+    this.bearerToken = bearerToken;
+  }
+
+  @Override
+  public void applyToParams(List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams) {
+    if(bearerToken == null) {
+      return;
+    }
+
+    headerParams.put("Authorization", (scheme != null ? upperCaseBearer(scheme) + " " : "") + bearerToken);
+  }
+
+  private static String upperCaseBearer(String scheme) {
+    return ("bearer".equalsIgnoreCase(scheme)) ? "Bearer" : scheme;
+  }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/auth/OAuth.java

@@ -0,0 +1,39 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.auth;
+
+import org.openapitools.client.Pair;
+
+import java.util.Map;
+import java.util.List;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class OAuth implements Authentication {
+  private String accessToken;
+
+  public String getAccessToken() {
+    return accessToken;
+  }
+
+  public void setAccessToken(String accessToken) {
+    this.accessToken = accessToken;
+  }
+
+  @Override
+  public void applyToParams(List<Pair> queryParams, Map<String, String> headerParams, Map<String, String> cookieParams) {
+    if (accessToken != null) {
+      headerParams.put("Authorization", "Bearer " + accessToken);
+    }
+  }
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/auth/OAuthFlow.java

@@ -0,0 +1,22 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.auth;
+
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public enum OAuthFlow {
+    accessCode, //called authorizationCode  in OpenAPI 3.0
+    implicit,
+    password,
+    application //called clientCredentials in OpenAPI 3.0
+}

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesAnyType.java

@@ -0,0 +1,109 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * AdditionalPropertiesAnyType
+ */
+@JsonPropertyOrder({
+  AdditionalPropertiesAnyType.JSON_PROPERTY_NAME
+})
+@JsonTypeName("AdditionalPropertiesAnyType")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class AdditionalPropertiesAnyType extends HashMap<String, Object> {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public AdditionalPropertiesAnyType name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AdditionalPropertiesAnyType additionalPropertiesAnyType = (AdditionalPropertiesAnyType) o;
+    return Objects.equals(this.name, additionalPropertiesAnyType.name) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AdditionalPropertiesAnyType {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesArray.java

@@ -0,0 +1,110 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * AdditionalPropertiesArray
+ */
+@JsonPropertyOrder({
+  AdditionalPropertiesArray.JSON_PROPERTY_NAME
+})
+@JsonTypeName("AdditionalPropertiesArray")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class AdditionalPropertiesArray extends HashMap<String, List> {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public AdditionalPropertiesArray name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AdditionalPropertiesArray additionalPropertiesArray = (AdditionalPropertiesArray) o;
+    return Objects.equals(this.name, additionalPropertiesArray.name) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AdditionalPropertiesArray {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesBoolean.java

@@ -0,0 +1,109 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * AdditionalPropertiesBoolean
+ */
+@JsonPropertyOrder({
+  AdditionalPropertiesBoolean.JSON_PROPERTY_NAME
+})
+@JsonTypeName("AdditionalPropertiesBoolean")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class AdditionalPropertiesBoolean extends HashMap<String, Boolean> {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public AdditionalPropertiesBoolean name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AdditionalPropertiesBoolean additionalPropertiesBoolean = (AdditionalPropertiesBoolean) o;
+    return Objects.equals(this.name, additionalPropertiesBoolean.name) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AdditionalPropertiesBoolean {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesClass.java

@@ -0,0 +1,503 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * AdditionalPropertiesClass
+ */
+@JsonPropertyOrder({
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_STRING,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_NUMBER,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_INTEGER,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_BOOLEAN,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_ARRAY_INTEGER,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_ARRAY_ANYTYPE,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_MAP_STRING,
+  AdditionalPropertiesClass.JSON_PROPERTY_MAP_MAP_ANYTYPE,
+  AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE1,
+  AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE2,
+  AdditionalPropertiesClass.JSON_PROPERTY_ANYTYPE3
+})
+@JsonTypeName("AdditionalPropertiesClass")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class AdditionalPropertiesClass {
+  public static final String JSON_PROPERTY_MAP_STRING = "map_string";
+  private Map<String, String> mapString = null;
+
+  public static final String JSON_PROPERTY_MAP_NUMBER = "map_number";
+  private Map<String, BigDecimal> mapNumber = null;
+
+  public static final String JSON_PROPERTY_MAP_INTEGER = "map_integer";
+  private Map<String, Integer> mapInteger = null;
+
+  public static final String JSON_PROPERTY_MAP_BOOLEAN = "map_boolean";
+  private Map<String, Boolean> mapBoolean = null;
+
+  public static final String JSON_PROPERTY_MAP_ARRAY_INTEGER = "map_array_integer";
+  private Map<String, List<Integer>> mapArrayInteger = null;
+
+  public static final String JSON_PROPERTY_MAP_ARRAY_ANYTYPE = "map_array_anytype";
+  private Map<String, List<Object>> mapArrayAnytype = null;
+
+  public static final String JSON_PROPERTY_MAP_MAP_STRING = "map_map_string";
+  private Map<String, Map<String, String>> mapMapString = null;
+
+  public static final String JSON_PROPERTY_MAP_MAP_ANYTYPE = "map_map_anytype";
+  private Map<String, Map<String, Object>> mapMapAnytype = null;
+
+  public static final String JSON_PROPERTY_ANYTYPE1 = "anytype_1";
+  private Object anytype1;
+
+  public static final String JSON_PROPERTY_ANYTYPE2 = "anytype_2";
+  private Object anytype2;
+
+  public static final String JSON_PROPERTY_ANYTYPE3 = "anytype_3";
+  private Object anytype3;
+
+
+  public AdditionalPropertiesClass mapString(Map<String, String> mapString) {
+    
+    this.mapString = mapString;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapStringItem(String key, String mapStringItem) {
+    if (this.mapString == null) {
+      this.mapString = new HashMap<>();
+    }
+    this.mapString.put(key, mapStringItem);
+    return this;
+  }
+
+   /**
+   * Get mapString
+   * @return mapString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, String> getMapString() {
+    return mapString;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMapString(Map<String, String> mapString) {
+    this.mapString = mapString;
+  }
+
+
+  public AdditionalPropertiesClass mapNumber(Map<String, BigDecimal> mapNumber) {
+    
+    this.mapNumber = mapNumber;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapNumberItem(String key, BigDecimal mapNumberItem) {
+    if (this.mapNumber == null) {
+      this.mapNumber = new HashMap<>();
+    }
+    this.mapNumber.put(key, mapNumberItem);
+    return this;
+  }
+
+   /**
+   * Get mapNumber
+   * @return mapNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, BigDecimal> getMapNumber() {
+    return mapNumber;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMapNumber(Map<String, BigDecimal> mapNumber) {
+    this.mapNumber = mapNumber;
+  }
+
+
+  public AdditionalPropertiesClass mapInteger(Map<String, Integer> mapInteger) {
+    
+    this.mapInteger = mapInteger;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapIntegerItem(String key, Integer mapIntegerItem) {
+    if (this.mapInteger == null) {
+      this.mapInteger = new HashMap<>();
+    }
+    this.mapInteger.put(key, mapIntegerItem);
+    return this;
+  }
+
+   /**
+   * Get mapInteger
+   * @return mapInteger
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Integer> getMapInteger() {
+    return mapInteger;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMapInteger(Map<String, Integer> mapInteger) {
+    this.mapInteger = mapInteger;
+  }
+
+
+  public AdditionalPropertiesClass mapBoolean(Map<String, Boolean> mapBoolean) {
+    
+    this.mapBoolean = mapBoolean;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapBooleanItem(String key, Boolean mapBooleanItem) {
+    if (this.mapBoolean == null) {
+      this.mapBoolean = new HashMap<>();
+    }
+    this.mapBoolean.put(key, mapBooleanItem);
+    return this;
+  }
+
+   /**
+   * Get mapBoolean
+   * @return mapBoolean
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_BOOLEAN)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Boolean> getMapBoolean() {
+    return mapBoolean;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP_BOOLEAN)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMapBoolean(Map<String, Boolean> mapBoolean) {
+    this.mapBoolean = mapBoolean;
+  }
+
+
+  public AdditionalPropertiesClass mapArrayInteger(Map<String, List<Integer>> mapArrayInteger) {
+    
+    this.mapArrayInteger = mapArrayInteger;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapArrayIntegerItem(String key, List<Integer> mapArrayIntegerItem) {
+    if (this.mapArrayInteger == null) {
+      this.mapArrayInteger = new HashMap<>();
+    }
+    this.mapArrayInteger.put(key, mapArrayIntegerItem);
+    return this;
+  }
+
+   /**
+   * Get mapArrayInteger
+   * @return mapArrayInteger
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_ARRAY_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, List<Integer>> getMapArrayInteger() {
+    return mapArrayInteger;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP_ARRAY_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMapArrayInteger(Map<String, List<Integer>> mapArrayInteger) {
+    this.mapArrayInteger = mapArrayInteger;
+  }
+
+
+  public AdditionalPropertiesClass mapArrayAnytype(Map<String, List<Object>> mapArrayAnytype) {
+    
+    this.mapArrayAnytype = mapArrayAnytype;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapArrayAnytypeItem(String key, List<Object> mapArrayAnytypeItem) {
+    if (this.mapArrayAnytype == null) {
+      this.mapArrayAnytype = new HashMap<>();
+    }
+    this.mapArrayAnytype.put(key, mapArrayAnytypeItem);
+    return this;
+  }
+
+   /**
+   * Get mapArrayAnytype
+   * @return mapArrayAnytype
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_ARRAY_ANYTYPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, List<Object>> getMapArrayAnytype() {
+    return mapArrayAnytype;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP_ARRAY_ANYTYPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMapArrayAnytype(Map<String, List<Object>> mapArrayAnytype) {
+    this.mapArrayAnytype = mapArrayAnytype;
+  }
+
+
+  public AdditionalPropertiesClass mapMapString(Map<String, Map<String, String>> mapMapString) {
+    
+    this.mapMapString = mapMapString;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapMapStringItem(String key, Map<String, String> mapMapStringItem) {
+    if (this.mapMapString == null) {
+      this.mapMapString = new HashMap<>();
+    }
+    this.mapMapString.put(key, mapMapStringItem);
+    return this;
+  }
+
+   /**
+   * Get mapMapString
+   * @return mapMapString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_MAP_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Map<String, String>> getMapMapString() {
+    return mapMapString;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP_MAP_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMapMapString(Map<String, Map<String, String>> mapMapString) {
+    this.mapMapString = mapMapString;
+  }
+
+
+  public AdditionalPropertiesClass mapMapAnytype(Map<String, Map<String, Object>> mapMapAnytype) {
+    
+    this.mapMapAnytype = mapMapAnytype;
+    return this;
+  }
+
+  public AdditionalPropertiesClass putMapMapAnytypeItem(String key, Map<String, Object> mapMapAnytypeItem) {
+    if (this.mapMapAnytype == null) {
+      this.mapMapAnytype = new HashMap<>();
+    }
+    this.mapMapAnytype.put(key, mapMapAnytypeItem);
+    return this;
+  }
+
+   /**
+   * Get mapMapAnytype
+   * @return mapMapAnytype
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_MAP_ANYTYPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Map<String, Object>> getMapMapAnytype() {
+    return mapMapAnytype;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP_MAP_ANYTYPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMapMapAnytype(Map<String, Map<String, Object>> mapMapAnytype) {
+    this.mapMapAnytype = mapMapAnytype;
+  }
+
+
+  public AdditionalPropertiesClass anytype1(Object anytype1) {
+    
+    this.anytype1 = anytype1;
+    return this;
+  }
+
+   /**
+   * Get anytype1
+   * @return anytype1
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ANYTYPE1)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Object getAnytype1() {
+    return anytype1;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ANYTYPE1)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setAnytype1(Object anytype1) {
+    this.anytype1 = anytype1;
+  }
+
+
+  public AdditionalPropertiesClass anytype2(Object anytype2) {
+    
+    this.anytype2 = anytype2;
+    return this;
+  }
+
+   /**
+   * Get anytype2
+   * @return anytype2
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ANYTYPE2)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Object getAnytype2() {
+    return anytype2;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ANYTYPE2)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setAnytype2(Object anytype2) {
+    this.anytype2 = anytype2;
+  }
+
+
+  public AdditionalPropertiesClass anytype3(Object anytype3) {
+    
+    this.anytype3 = anytype3;
+    return this;
+  }
+
+   /**
+   * Get anytype3
+   * @return anytype3
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ANYTYPE3)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Object getAnytype3() {
+    return anytype3;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ANYTYPE3)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setAnytype3(Object anytype3) {
+    this.anytype3 = anytype3;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AdditionalPropertiesClass additionalPropertiesClass = (AdditionalPropertiesClass) o;
+    return Objects.equals(this.mapString, additionalPropertiesClass.mapString) &&
+        Objects.equals(this.mapNumber, additionalPropertiesClass.mapNumber) &&
+        Objects.equals(this.mapInteger, additionalPropertiesClass.mapInteger) &&
+        Objects.equals(this.mapBoolean, additionalPropertiesClass.mapBoolean) &&
+        Objects.equals(this.mapArrayInteger, additionalPropertiesClass.mapArrayInteger) &&
+        Objects.equals(this.mapArrayAnytype, additionalPropertiesClass.mapArrayAnytype) &&
+        Objects.equals(this.mapMapString, additionalPropertiesClass.mapMapString) &&
+        Objects.equals(this.mapMapAnytype, additionalPropertiesClass.mapMapAnytype) &&
+        Objects.equals(this.anytype1, additionalPropertiesClass.anytype1) &&
+        Objects.equals(this.anytype2, additionalPropertiesClass.anytype2) &&
+        Objects.equals(this.anytype3, additionalPropertiesClass.anytype3);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(mapString, mapNumber, mapInteger, mapBoolean, mapArrayInteger, mapArrayAnytype, mapMapString, mapMapAnytype, anytype1, anytype2, anytype3);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AdditionalPropertiesClass {\n");
+    sb.append("    mapString: ").append(toIndentedString(mapString)).append("\n");
+    sb.append("    mapNumber: ").append(toIndentedString(mapNumber)).append("\n");
+    sb.append("    mapInteger: ").append(toIndentedString(mapInteger)).append("\n");
+    sb.append("    mapBoolean: ").append(toIndentedString(mapBoolean)).append("\n");
+    sb.append("    mapArrayInteger: ").append(toIndentedString(mapArrayInteger)).append("\n");
+    sb.append("    mapArrayAnytype: ").append(toIndentedString(mapArrayAnytype)).append("\n");
+    sb.append("    mapMapString: ").append(toIndentedString(mapMapString)).append("\n");
+    sb.append("    mapMapAnytype: ").append(toIndentedString(mapMapAnytype)).append("\n");
+    sb.append("    anytype1: ").append(toIndentedString(anytype1)).append("\n");
+    sb.append("    anytype2: ").append(toIndentedString(anytype2)).append("\n");
+    sb.append("    anytype3: ").append(toIndentedString(anytype3)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesInteger.java

@@ -0,0 +1,109 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * AdditionalPropertiesInteger
+ */
+@JsonPropertyOrder({
+  AdditionalPropertiesInteger.JSON_PROPERTY_NAME
+})
+@JsonTypeName("AdditionalPropertiesInteger")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class AdditionalPropertiesInteger extends HashMap<String, Integer> {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public AdditionalPropertiesInteger name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AdditionalPropertiesInteger additionalPropertiesInteger = (AdditionalPropertiesInteger) o;
+    return Objects.equals(this.name, additionalPropertiesInteger.name) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AdditionalPropertiesInteger {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesNumber.java

@@ -0,0 +1,110 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * AdditionalPropertiesNumber
+ */
+@JsonPropertyOrder({
+  AdditionalPropertiesNumber.JSON_PROPERTY_NAME
+})
+@JsonTypeName("AdditionalPropertiesNumber")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class AdditionalPropertiesNumber extends HashMap<String, BigDecimal> {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public AdditionalPropertiesNumber name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AdditionalPropertiesNumber additionalPropertiesNumber = (AdditionalPropertiesNumber) o;
+    return Objects.equals(this.name, additionalPropertiesNumber.name) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AdditionalPropertiesNumber {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesObject.java

@@ -0,0 +1,109 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * AdditionalPropertiesObject
+ */
+@JsonPropertyOrder({
+  AdditionalPropertiesObject.JSON_PROPERTY_NAME
+})
+@JsonTypeName("AdditionalPropertiesObject")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class AdditionalPropertiesObject extends HashMap<String, Map> {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public AdditionalPropertiesObject name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AdditionalPropertiesObject additionalPropertiesObject = (AdditionalPropertiesObject) o;
+    return Objects.equals(this.name, additionalPropertiesObject.name) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AdditionalPropertiesObject {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/AdditionalPropertiesString.java

@@ -0,0 +1,109 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * AdditionalPropertiesString
+ */
+@JsonPropertyOrder({
+  AdditionalPropertiesString.JSON_PROPERTY_NAME
+})
+@JsonTypeName("AdditionalPropertiesString")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class AdditionalPropertiesString extends HashMap<String, String> {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public AdditionalPropertiesString name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AdditionalPropertiesString additionalPropertiesString = (AdditionalPropertiesString) o;
+    return Objects.equals(this.name, additionalPropertiesString.name) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AdditionalPropertiesString {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Animal.java

@@ -0,0 +1,150 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.BigCat;
+import org.openapitools.client.model.Cat;
+import org.openapitools.client.model.Dog;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Animal
+ */
+@JsonPropertyOrder({
+  Animal.JSON_PROPERTY_CLASS_NAME,
+  Animal.JSON_PROPERTY_COLOR
+})
+@JsonTypeName("Animal")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = BigCat.class, name = "BigCat"),
+  @JsonSubTypes.Type(value = Cat.class, name = "Cat"),
+  @JsonSubTypes.Type(value = Dog.class, name = "Dog"),
+})
+
+public class Animal {
+  public static final String JSON_PROPERTY_CLASS_NAME = "className";
+  protected String className;
+
+  public static final String JSON_PROPERTY_COLOR = "color";
+  private String color = "red";
+
+
+  public Animal className(String className) {
+    
+    this.className = className;
+    return this;
+  }
+
+   /**
+   * Get className
+   * @return className
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_CLASS_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getClassName() {
+    return className;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_CLASS_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setClassName(String className) {
+    this.className = className;
+  }
+
+
+  public Animal color(String color) {
+    
+    this.color = color;
+    return this;
+  }
+
+   /**
+   * Get color
+   * @return color
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_COLOR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getColor() {
+    return color;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_COLOR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setColor(String color) {
+    this.color = color;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Animal animal = (Animal) o;
+    return Objects.equals(this.className, animal.className) &&
+        Objects.equals(this.color, animal.color);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(className, color);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Animal {\n");
+    sb.append("    className: ").append(toIndentedString(className)).append("\n");
+    sb.append("    color: ").append(toIndentedString(color)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnly.java

@@ -0,0 +1,116 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ArrayOfArrayOfNumberOnly
+ */
+@JsonPropertyOrder({
+  ArrayOfArrayOfNumberOnly.JSON_PROPERTY_ARRAY_ARRAY_NUMBER
+})
+@JsonTypeName("ArrayOfArrayOfNumberOnly")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ArrayOfArrayOfNumberOnly {
+  public static final String JSON_PROPERTY_ARRAY_ARRAY_NUMBER = "ArrayArrayNumber";
+  private List<List<BigDecimal>> arrayArrayNumber = null;
+
+
+  public ArrayOfArrayOfNumberOnly arrayArrayNumber(List<List<BigDecimal>> arrayArrayNumber) {
+    
+    this.arrayArrayNumber = arrayArrayNumber;
+    return this;
+  }
+
+  public ArrayOfArrayOfNumberOnly addArrayArrayNumberItem(List<BigDecimal> arrayArrayNumberItem) {
+    if (this.arrayArrayNumber == null) {
+      this.arrayArrayNumber = new ArrayList<>();
+    }
+    this.arrayArrayNumber.add(arrayArrayNumberItem);
+    return this;
+  }
+
+   /**
+   * Get arrayArrayNumber
+   * @return arrayArrayNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ARRAY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<List<BigDecimal>> getArrayArrayNumber() {
+    return arrayArrayNumber;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_ARRAY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setArrayArrayNumber(List<List<BigDecimal>> arrayArrayNumber) {
+    this.arrayArrayNumber = arrayArrayNumber;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ArrayOfArrayOfNumberOnly arrayOfArrayOfNumberOnly = (ArrayOfArrayOfNumberOnly) o;
+    return Objects.equals(this.arrayArrayNumber, arrayOfArrayOfNumberOnly.arrayArrayNumber);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(arrayArrayNumber);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ArrayOfArrayOfNumberOnly {\n");
+    sb.append("    arrayArrayNumber: ").append(toIndentedString(arrayArrayNumber)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/ArrayOfNumberOnly.java

@@ -0,0 +1,116 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ArrayOfNumberOnly
+ */
+@JsonPropertyOrder({
+  ArrayOfNumberOnly.JSON_PROPERTY_ARRAY_NUMBER
+})
+@JsonTypeName("ArrayOfNumberOnly")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ArrayOfNumberOnly {
+  public static final String JSON_PROPERTY_ARRAY_NUMBER = "ArrayNumber";
+  private List<BigDecimal> arrayNumber = null;
+
+
+  public ArrayOfNumberOnly arrayNumber(List<BigDecimal> arrayNumber) {
+    
+    this.arrayNumber = arrayNumber;
+    return this;
+  }
+
+  public ArrayOfNumberOnly addArrayNumberItem(BigDecimal arrayNumberItem) {
+    if (this.arrayNumber == null) {
+      this.arrayNumber = new ArrayList<>();
+    }
+    this.arrayNumber.add(arrayNumberItem);
+    return this;
+  }
+
+   /**
+   * Get arrayNumber
+   * @return arrayNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<BigDecimal> getArrayNumber() {
+    return arrayNumber;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setArrayNumber(List<BigDecimal> arrayNumber) {
+    this.arrayNumber = arrayNumber;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ArrayOfNumberOnly arrayOfNumberOnly = (ArrayOfNumberOnly) o;
+    return Objects.equals(this.arrayNumber, arrayOfNumberOnly.arrayNumber);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(arrayNumber);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ArrayOfNumberOnly {\n");
+    sb.append("    arrayNumber: ").append(toIndentedString(arrayNumber)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/ArrayTest.java

@@ -0,0 +1,198 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.List;
+import org.openapitools.client.model.ReadOnlyFirst;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ArrayTest
+ */
+@JsonPropertyOrder({
+  ArrayTest.JSON_PROPERTY_ARRAY_OF_STRING,
+  ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER,
+  ArrayTest.JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL
+})
+@JsonTypeName("ArrayTest")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ArrayTest {
+  public static final String JSON_PROPERTY_ARRAY_OF_STRING = "array_of_string";
+  private List<String> arrayOfString = null;
+
+  public static final String JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER = "array_array_of_integer";
+  private List<List<Long>> arrayArrayOfInteger = null;
+
+  public static final String JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL = "array_array_of_model";
+  private List<List<ReadOnlyFirst>> arrayArrayOfModel = null;
+
+
+  public ArrayTest arrayOfString(List<String> arrayOfString) {
+    
+    this.arrayOfString = arrayOfString;
+    return this;
+  }
+
+  public ArrayTest addArrayOfStringItem(String arrayOfStringItem) {
+    if (this.arrayOfString == null) {
+      this.arrayOfString = new ArrayList<>();
+    }
+    this.arrayOfString.add(arrayOfStringItem);
+    return this;
+  }
+
+   /**
+   * Get arrayOfString
+   * @return arrayOfString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_OF_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<String> getArrayOfString() {
+    return arrayOfString;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_OF_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setArrayOfString(List<String> arrayOfString) {
+    this.arrayOfString = arrayOfString;
+  }
+
+
+  public ArrayTest arrayArrayOfInteger(List<List<Long>> arrayArrayOfInteger) {
+    
+    this.arrayArrayOfInteger = arrayArrayOfInteger;
+    return this;
+  }
+
+  public ArrayTest addArrayArrayOfIntegerItem(List<Long> arrayArrayOfIntegerItem) {
+    if (this.arrayArrayOfInteger == null) {
+      this.arrayArrayOfInteger = new ArrayList<>();
+    }
+    this.arrayArrayOfInteger.add(arrayArrayOfIntegerItem);
+    return this;
+  }
+
+   /**
+   * Get arrayArrayOfInteger
+   * @return arrayArrayOfInteger
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<List<Long>> getArrayArrayOfInteger() {
+    return arrayArrayOfInteger;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_ARRAY_OF_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setArrayArrayOfInteger(List<List<Long>> arrayArrayOfInteger) {
+    this.arrayArrayOfInteger = arrayArrayOfInteger;
+  }
+
+
+  public ArrayTest arrayArrayOfModel(List<List<ReadOnlyFirst>> arrayArrayOfModel) {
+    
+    this.arrayArrayOfModel = arrayArrayOfModel;
+    return this;
+  }
+
+  public ArrayTest addArrayArrayOfModelItem(List<ReadOnlyFirst> arrayArrayOfModelItem) {
+    if (this.arrayArrayOfModel == null) {
+      this.arrayArrayOfModel = new ArrayList<>();
+    }
+    this.arrayArrayOfModel.add(arrayArrayOfModelItem);
+    return this;
+  }
+
+   /**
+   * Get arrayArrayOfModel
+   * @return arrayArrayOfModel
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<List<ReadOnlyFirst>> getArrayArrayOfModel() {
+    return arrayArrayOfModel;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_ARRAY_OF_MODEL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setArrayArrayOfModel(List<List<ReadOnlyFirst>> arrayArrayOfModel) {
+    this.arrayArrayOfModel = arrayArrayOfModel;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ArrayTest arrayTest = (ArrayTest) o;
+    return Objects.equals(this.arrayOfString, arrayTest.arrayOfString) &&
+        Objects.equals(this.arrayArrayOfInteger, arrayTest.arrayArrayOfInteger) &&
+        Objects.equals(this.arrayArrayOfModel, arrayTest.arrayArrayOfModel);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(arrayOfString, arrayArrayOfInteger, arrayArrayOfModel);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ArrayTest {\n");
+    sb.append("    arrayOfString: ").append(toIndentedString(arrayOfString)).append("\n");
+    sb.append("    arrayArrayOfInteger: ").append(toIndentedString(arrayArrayOfInteger)).append("\n");
+    sb.append("    arrayArrayOfModel: ").append(toIndentedString(arrayArrayOfModel)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/BigCat.java

@@ -0,0 +1,152 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.BigCatAllOf;
+import org.openapitools.client.model.Cat;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * BigCat
+ */
+@JsonPropertyOrder({
+  BigCat.JSON_PROPERTY_KIND
+})
+@JsonTypeName("BigCat")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
+
+public class BigCat extends Cat {
+  /**
+   * Gets or Sets kind
+   */
+  public enum KindEnum {
+    LIONS("lions"),
+    
+    TIGERS("tigers"),
+    
+    LEOPARDS("leopards"),
+    
+    JAGUARS("jaguars");
+
+    private String value;
+
+    KindEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static KindEnum fromValue(String value) {
+      for (KindEnum b : KindEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_KIND = "kind";
+  private KindEnum kind;
+
+
+  public BigCat kind(KindEnum kind) {
+    
+    this.kind = kind;
+    return this;
+  }
+
+   /**
+   * Get kind
+   * @return kind
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_KIND)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public KindEnum getKind() {
+    return kind;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_KIND)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setKind(KindEnum kind) {
+    this.kind = kind;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    BigCat bigCat = (BigCat) o;
+    return Objects.equals(this.kind, bigCat.kind) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(kind, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class BigCat {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    kind: ").append(toIndentedString(kind)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/BigCatAllOf.java

@@ -0,0 +1,144 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * BigCatAllOf
+ */
+@JsonPropertyOrder({
+  BigCatAllOf.JSON_PROPERTY_KIND
+})
+@JsonTypeName("BigCat_allOf")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class BigCatAllOf {
+  /**
+   * Gets or Sets kind
+   */
+  public enum KindEnum {
+    LIONS("lions"),
+    
+    TIGERS("tigers"),
+    
+    LEOPARDS("leopards"),
+    
+    JAGUARS("jaguars");
+
+    private String value;
+
+    KindEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static KindEnum fromValue(String value) {
+      for (KindEnum b : KindEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_KIND = "kind";
+  private KindEnum kind;
+
+
+  public BigCatAllOf kind(KindEnum kind) {
+    
+    this.kind = kind;
+    return this;
+  }
+
+   /**
+   * Get kind
+   * @return kind
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_KIND)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public KindEnum getKind() {
+    return kind;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_KIND)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setKind(KindEnum kind) {
+    this.kind = kind;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    BigCatAllOf bigCatAllOf = (BigCatAllOf) o;
+    return Objects.equals(this.kind, bigCatAllOf.kind);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(kind);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class BigCatAllOf {\n");
+    sb.append("    kind: ").append(toIndentedString(kind)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Capitalization.java

@@ -0,0 +1,270 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Capitalization
+ */
+@JsonPropertyOrder({
+  Capitalization.JSON_PROPERTY_SMALL_CAMEL,
+  Capitalization.JSON_PROPERTY_CAPITAL_CAMEL,
+  Capitalization.JSON_PROPERTY_SMALL_SNAKE,
+  Capitalization.JSON_PROPERTY_CAPITAL_SNAKE,
+  Capitalization.JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS,
+  Capitalization.JSON_PROPERTY_A_T_T_N_A_M_E
+})
+@JsonTypeName("Capitalization")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Capitalization {
+  public static final String JSON_PROPERTY_SMALL_CAMEL = "smallCamel";
+  private String smallCamel;
+
+  public static final String JSON_PROPERTY_CAPITAL_CAMEL = "CapitalCamel";
+  private String capitalCamel;
+
+  public static final String JSON_PROPERTY_SMALL_SNAKE = "small_Snake";
+  private String smallSnake;
+
+  public static final String JSON_PROPERTY_CAPITAL_SNAKE = "Capital_Snake";
+  private String capitalSnake;
+
+  public static final String JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS = "SCA_ETH_Flow_Points";
+  private String scAETHFlowPoints;
+
+  public static final String JSON_PROPERTY_A_T_T_N_A_M_E = "ATT_NAME";
+  private String ATT_NAME;
+
+
+  public Capitalization smallCamel(String smallCamel) {
+    
+    this.smallCamel = smallCamel;
+    return this;
+  }
+
+   /**
+   * Get smallCamel
+   * @return smallCamel
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SMALL_CAMEL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getSmallCamel() {
+    return smallCamel;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_SMALL_CAMEL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setSmallCamel(String smallCamel) {
+    this.smallCamel = smallCamel;
+  }
+
+
+  public Capitalization capitalCamel(String capitalCamel) {
+    
+    this.capitalCamel = capitalCamel;
+    return this;
+  }
+
+   /**
+   * Get capitalCamel
+   * @return capitalCamel
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CAPITAL_CAMEL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getCapitalCamel() {
+    return capitalCamel;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_CAPITAL_CAMEL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setCapitalCamel(String capitalCamel) {
+    this.capitalCamel = capitalCamel;
+  }
+
+
+  public Capitalization smallSnake(String smallSnake) {
+    
+    this.smallSnake = smallSnake;
+    return this;
+  }
+
+   /**
+   * Get smallSnake
+   * @return smallSnake
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SMALL_SNAKE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getSmallSnake() {
+    return smallSnake;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_SMALL_SNAKE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setSmallSnake(String smallSnake) {
+    this.smallSnake = smallSnake;
+  }
+
+
+  public Capitalization capitalSnake(String capitalSnake) {
+    
+    this.capitalSnake = capitalSnake;
+    return this;
+  }
+
+   /**
+   * Get capitalSnake
+   * @return capitalSnake
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CAPITAL_SNAKE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getCapitalSnake() {
+    return capitalSnake;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_CAPITAL_SNAKE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setCapitalSnake(String capitalSnake) {
+    this.capitalSnake = capitalSnake;
+  }
+
+
+  public Capitalization scAETHFlowPoints(String scAETHFlowPoints) {
+    
+    this.scAETHFlowPoints = scAETHFlowPoints;
+    return this;
+  }
+
+   /**
+   * Get scAETHFlowPoints
+   * @return scAETHFlowPoints
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getScAETHFlowPoints() {
+    return scAETHFlowPoints;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_SC_A_E_T_H_FLOW_POINTS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setScAETHFlowPoints(String scAETHFlowPoints) {
+    this.scAETHFlowPoints = scAETHFlowPoints;
+  }
+
+
+  public Capitalization ATT_NAME(String ATT_NAME) {
+    
+    this.ATT_NAME = ATT_NAME;
+    return this;
+  }
+
+   /**
+   * Name of the pet 
+   * @return ATT_NAME
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "Name of the pet ")
+  @JsonProperty(JSON_PROPERTY_A_T_T_N_A_M_E)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getATTNAME() {
+    return ATT_NAME;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_A_T_T_N_A_M_E)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setATTNAME(String ATT_NAME) {
+    this.ATT_NAME = ATT_NAME;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Capitalization capitalization = (Capitalization) o;
+    return Objects.equals(this.smallCamel, capitalization.smallCamel) &&
+        Objects.equals(this.capitalCamel, capitalization.capitalCamel) &&
+        Objects.equals(this.smallSnake, capitalization.smallSnake) &&
+        Objects.equals(this.capitalSnake, capitalization.capitalSnake) &&
+        Objects.equals(this.scAETHFlowPoints, capitalization.scAETHFlowPoints) &&
+        Objects.equals(this.ATT_NAME, capitalization.ATT_NAME);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(smallCamel, capitalCamel, smallSnake, capitalSnake, scAETHFlowPoints, ATT_NAME);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Capitalization {\n");
+    sb.append("    smallCamel: ").append(toIndentedString(smallCamel)).append("\n");
+    sb.append("    capitalCamel: ").append(toIndentedString(capitalCamel)).append("\n");
+    sb.append("    smallSnake: ").append(toIndentedString(smallSnake)).append("\n");
+    sb.append("    capitalSnake: ").append(toIndentedString(capitalSnake)).append("\n");
+    sb.append("    scAETHFlowPoints: ").append(toIndentedString(scAETHFlowPoints)).append("\n");
+    sb.append("    ATT_NAME: ").append(toIndentedString(ATT_NAME)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Cat.java

@@ -0,0 +1,117 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Animal;
+import org.openapitools.client.model.BigCat;
+import org.openapitools.client.model.CatAllOf;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Cat
+ */
+@JsonPropertyOrder({
+  Cat.JSON_PROPERTY_DECLAWED
+})
+@JsonTypeName("Cat")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = BigCat.class, name = "BigCat"),
+})
+
+public class Cat extends Animal {
+  public static final String JSON_PROPERTY_DECLAWED = "declawed";
+  private Boolean declawed;
+
+
+  public Cat declawed(Boolean declawed) {
+    
+    this.declawed = declawed;
+    return this;
+  }
+
+   /**
+   * Get declawed
+   * @return declawed
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DECLAWED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Boolean getDeclawed() {
+    return declawed;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DECLAWED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setDeclawed(Boolean declawed) {
+    this.declawed = declawed;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Cat cat = (Cat) o;
+    return Objects.equals(this.declawed, cat.declawed) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(declawed, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Cat {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    declawed: ").append(toIndentedString(declawed)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/CatAllOf.java

@@ -0,0 +1,105 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * CatAllOf
+ */
+@JsonPropertyOrder({
+  CatAllOf.JSON_PROPERTY_DECLAWED
+})
+@JsonTypeName("Cat_allOf")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class CatAllOf {
+  public static final String JSON_PROPERTY_DECLAWED = "declawed";
+  private Boolean declawed;
+
+
+  public CatAllOf declawed(Boolean declawed) {
+    
+    this.declawed = declawed;
+    return this;
+  }
+
+   /**
+   * Get declawed
+   * @return declawed
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DECLAWED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Boolean getDeclawed() {
+    return declawed;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DECLAWED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setDeclawed(Boolean declawed) {
+    this.declawed = declawed;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    CatAllOf catAllOf = (CatAllOf) o;
+    return Objects.equals(this.declawed, catAllOf.declawed);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(declawed);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class CatAllOf {\n");
+    sb.append("    declawed: ").append(toIndentedString(declawed)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Category.java

@@ -0,0 +1,138 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Category
+ */
+@JsonPropertyOrder({
+  Category.JSON_PROPERTY_ID,
+  Category.JSON_PROPERTY_NAME
+})
+@JsonTypeName("Category")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Category {
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name = "default-name";
+
+
+  public Category id(Long id) {
+    
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public Category name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Category category = (Category) o;
+    return Objects.equals(this.id, category.id) &&
+        Objects.equals(this.name, category.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Category {\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/ClassModel.java

@@ -0,0 +1,106 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Model for testing model with \"_class\" property
+ */
+@ApiModel(description = "Model for testing model with \"_class\" property")
+@JsonPropertyOrder({
+  ClassModel.JSON_PROPERTY_PROPERTY_CLASS
+})
+@JsonTypeName("ClassModel")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ClassModel {
+  public static final String JSON_PROPERTY_PROPERTY_CLASS = "_class";
+  private String propertyClass;
+
+
+  public ClassModel propertyClass(String propertyClass) {
+    
+    this.propertyClass = propertyClass;
+    return this;
+  }
+
+   /**
+   * Get propertyClass
+   * @return propertyClass
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_PROPERTY_CLASS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getPropertyClass() {
+    return propertyClass;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_PROPERTY_CLASS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setPropertyClass(String propertyClass) {
+    this.propertyClass = propertyClass;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ClassModel classModel = (ClassModel) o;
+    return Objects.equals(this.propertyClass, classModel.propertyClass);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(propertyClass);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ClassModel {\n");
+    sb.append("    propertyClass: ").append(toIndentedString(propertyClass)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Client.java

@@ -0,0 +1,105 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Client
+ */
+@JsonPropertyOrder({
+  Client.JSON_PROPERTY_CLIENT
+})
+@JsonTypeName("Client")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Client {
+  public static final String JSON_PROPERTY_CLIENT = "client";
+  private String client;
+
+
+  public Client client(String client) {
+    
+    this.client = client;
+    return this;
+  }
+
+   /**
+   * Get client
+   * @return client
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CLIENT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getClient() {
+    return client;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_CLIENT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setClient(String client) {
+    this.client = client;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Client client = (Client) o;
+    return Objects.equals(this.client, client.client);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(client);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Client {\n");
+    sb.append("    client: ").append(toIndentedString(client)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Dog.java

@@ -0,0 +1,113 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Animal;
+import org.openapitools.client.model.DogAllOf;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Dog
+ */
+@JsonPropertyOrder({
+  Dog.JSON_PROPERTY_BREED
+})
+@JsonTypeName("Dog")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "className", visible = true)
+
+public class Dog extends Animal {
+  public static final String JSON_PROPERTY_BREED = "breed";
+  private String breed;
+
+
+  public Dog breed(String breed) {
+    
+    this.breed = breed;
+    return this;
+  }
+
+   /**
+   * Get breed
+   * @return breed
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BREED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBreed() {
+    return breed;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_BREED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setBreed(String breed) {
+    this.breed = breed;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Dog dog = (Dog) o;
+    return Objects.equals(this.breed, dog.breed) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(breed, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Dog {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    breed: ").append(toIndentedString(breed)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/DogAllOf.java

@@ -0,0 +1,105 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * DogAllOf
+ */
+@JsonPropertyOrder({
+  DogAllOf.JSON_PROPERTY_BREED
+})
+@JsonTypeName("Dog_allOf")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class DogAllOf {
+  public static final String JSON_PROPERTY_BREED = "breed";
+  private String breed;
+
+
+  public DogAllOf breed(String breed) {
+    
+    this.breed = breed;
+    return this;
+  }
+
+   /**
+   * Get breed
+   * @return breed
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BREED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBreed() {
+    return breed;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_BREED)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setBreed(String breed) {
+    this.breed = breed;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    DogAllOf dogAllOf = (DogAllOf) o;
+    return Objects.equals(this.breed, dogAllOf.breed);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(breed);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class DogAllOf {\n");
+    sb.append("    breed: ").append(toIndentedString(breed)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/EnumArrays.java

@@ -0,0 +1,218 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * EnumArrays
+ */
+@JsonPropertyOrder({
+  EnumArrays.JSON_PROPERTY_JUST_SYMBOL,
+  EnumArrays.JSON_PROPERTY_ARRAY_ENUM
+})
+@JsonTypeName("EnumArrays")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class EnumArrays {
+  /**
+   * Gets or Sets justSymbol
+   */
+  public enum JustSymbolEnum {
+    GREATER_THAN_OR_EQUAL_TO(">="),
+    
+    DOLLAR("$");
+
+    private String value;
+
+    JustSymbolEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static JustSymbolEnum fromValue(String value) {
+      for (JustSymbolEnum b : JustSymbolEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_JUST_SYMBOL = "just_symbol";
+  private JustSymbolEnum justSymbol;
+
+  /**
+   * Gets or Sets arrayEnum
+   */
+  public enum ArrayEnumEnum {
+    FISH("fish"),
+    
+    CRAB("crab");
+
+    private String value;
+
+    ArrayEnumEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static ArrayEnumEnum fromValue(String value) {
+      for (ArrayEnumEnum b : ArrayEnumEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ARRAY_ENUM = "array_enum";
+  private List<ArrayEnumEnum> arrayEnum = null;
+
+
+  public EnumArrays justSymbol(JustSymbolEnum justSymbol) {
+    
+    this.justSymbol = justSymbol;
+    return this;
+  }
+
+   /**
+   * Get justSymbol
+   * @return justSymbol
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_JUST_SYMBOL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public JustSymbolEnum getJustSymbol() {
+    return justSymbol;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_JUST_SYMBOL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setJustSymbol(JustSymbolEnum justSymbol) {
+    this.justSymbol = justSymbol;
+  }
+
+
+  public EnumArrays arrayEnum(List<ArrayEnumEnum> arrayEnum) {
+    
+    this.arrayEnum = arrayEnum;
+    return this;
+  }
+
+  public EnumArrays addArrayEnumItem(ArrayEnumEnum arrayEnumItem) {
+    if (this.arrayEnum == null) {
+      this.arrayEnum = new ArrayList<>();
+    }
+    this.arrayEnum.add(arrayEnumItem);
+    return this;
+  }
+
+   /**
+   * Get arrayEnum
+   * @return arrayEnum
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ENUM)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<ArrayEnumEnum> getArrayEnum() {
+    return arrayEnum;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_ENUM)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setArrayEnum(List<ArrayEnumEnum> arrayEnum) {
+    this.arrayEnum = arrayEnum;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    EnumArrays enumArrays = (EnumArrays) o;
+    return Objects.equals(this.justSymbol, enumArrays.justSymbol) &&
+        Objects.equals(this.arrayEnum, enumArrays.arrayEnum);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(justSymbol, arrayEnum);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class EnumArrays {\n");
+    sb.append("    justSymbol: ").append(toIndentedString(justSymbol)).append("\n");
+    sb.append("    arrayEnum: ").append(toIndentedString(arrayEnum)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/EnumClass.java

@@ -0,0 +1,60 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Gets or Sets EnumClass
+ */
+public enum EnumClass {
+  
+  _ABC("_abc"),
+  
+  _EFG("-efg"),
+  
+  _XYZ_("(xyz)");
+
+  private String value;
+
+  EnumClass(String value) {
+    this.value = value;
+  }
+
+  @JsonValue
+  public String getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+
+  @JsonCreator
+  public static EnumClass fromValue(String value) {
+    for (EnumClass b : EnumClass.values()) {
+      if (b.value.equals(value)) {
+        return b;
+      }
+    }
+    throw new IllegalArgumentException("Unexpected value '" + value + "'");
+  }
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/EnumTest.java

@@ -0,0 +1,382 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.OuterEnum;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * EnumTest
+ */
+@JsonPropertyOrder({
+  EnumTest.JSON_PROPERTY_ENUM_STRING,
+  EnumTest.JSON_PROPERTY_ENUM_STRING_REQUIRED,
+  EnumTest.JSON_PROPERTY_ENUM_INTEGER,
+  EnumTest.JSON_PROPERTY_ENUM_NUMBER,
+  EnumTest.JSON_PROPERTY_OUTER_ENUM
+})
+@JsonTypeName("Enum_Test")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class EnumTest {
+  /**
+   * Gets or Sets enumString
+   */
+  public enum EnumStringEnum {
+    UPPER("UPPER"),
+    
+    LOWER("lower"),
+    
+    EMPTY("");
+
+    private String value;
+
+    EnumStringEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static EnumStringEnum fromValue(String value) {
+      for (EnumStringEnum b : EnumStringEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ENUM_STRING = "enum_string";
+  private EnumStringEnum enumString;
+
+  /**
+   * Gets or Sets enumStringRequired
+   */
+  public enum EnumStringRequiredEnum {
+    UPPER("UPPER"),
+    
+    LOWER("lower"),
+    
+    EMPTY("");
+
+    private String value;
+
+    EnumStringRequiredEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static EnumStringRequiredEnum fromValue(String value) {
+      for (EnumStringRequiredEnum b : EnumStringRequiredEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ENUM_STRING_REQUIRED = "enum_string_required";
+  private EnumStringRequiredEnum enumStringRequired;
+
+  /**
+   * Gets or Sets enumInteger
+   */
+  public enum EnumIntegerEnum {
+    NUMBER_1(1),
+    
+    NUMBER_MINUS_1(-1);
+
+    private Integer value;
+
+    EnumIntegerEnum(Integer value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public Integer getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static EnumIntegerEnum fromValue(Integer value) {
+      for (EnumIntegerEnum b : EnumIntegerEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ENUM_INTEGER = "enum_integer";
+  private EnumIntegerEnum enumInteger;
+
+  /**
+   * Gets or Sets enumNumber
+   */
+  public enum EnumNumberEnum {
+    NUMBER_1_DOT_1(1.1),
+    
+    NUMBER_MINUS_1_DOT_2(-1.2);
+
+    private Double value;
+
+    EnumNumberEnum(Double value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public Double getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static EnumNumberEnum fromValue(Double value) {
+      for (EnumNumberEnum b : EnumNumberEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_ENUM_NUMBER = "enum_number";
+  private EnumNumberEnum enumNumber;
+
+  public static final String JSON_PROPERTY_OUTER_ENUM = "outerEnum";
+  private OuterEnum outerEnum;
+
+
+  public EnumTest enumString(EnumStringEnum enumString) {
+    
+    this.enumString = enumString;
+    return this;
+  }
+
+   /**
+   * Get enumString
+   * @return enumString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ENUM_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public EnumStringEnum getEnumString() {
+    return enumString;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ENUM_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setEnumString(EnumStringEnum enumString) {
+    this.enumString = enumString;
+  }
+
+
+  public EnumTest enumStringRequired(EnumStringRequiredEnum enumStringRequired) {
+    
+    this.enumStringRequired = enumStringRequired;
+    return this;
+  }
+
+   /**
+   * Get enumStringRequired
+   * @return enumStringRequired
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_ENUM_STRING_REQUIRED)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public EnumStringRequiredEnum getEnumStringRequired() {
+    return enumStringRequired;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ENUM_STRING_REQUIRED)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setEnumStringRequired(EnumStringRequiredEnum enumStringRequired) {
+    this.enumStringRequired = enumStringRequired;
+  }
+
+
+  public EnumTest enumInteger(EnumIntegerEnum enumInteger) {
+    
+    this.enumInteger = enumInteger;
+    return this;
+  }
+
+   /**
+   * Get enumInteger
+   * @return enumInteger
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ENUM_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public EnumIntegerEnum getEnumInteger() {
+    return enumInteger;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ENUM_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setEnumInteger(EnumIntegerEnum enumInteger) {
+    this.enumInteger = enumInteger;
+  }
+
+
+  public EnumTest enumNumber(EnumNumberEnum enumNumber) {
+    
+    this.enumNumber = enumNumber;
+    return this;
+  }
+
+   /**
+   * Get enumNumber
+   * @return enumNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ENUM_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public EnumNumberEnum getEnumNumber() {
+    return enumNumber;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ENUM_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setEnumNumber(EnumNumberEnum enumNumber) {
+    this.enumNumber = enumNumber;
+  }
+
+
+  public EnumTest outerEnum(OuterEnum outerEnum) {
+    
+    this.outerEnum = outerEnum;
+    return this;
+  }
+
+   /**
+   * Get outerEnum
+   * @return outerEnum
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OuterEnum getOuterEnum() {
+    return outerEnum;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_OUTER_ENUM)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setOuterEnum(OuterEnum outerEnum) {
+    this.outerEnum = outerEnum;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    EnumTest enumTest = (EnumTest) o;
+    return Objects.equals(this.enumString, enumTest.enumString) &&
+        Objects.equals(this.enumStringRequired, enumTest.enumStringRequired) &&
+        Objects.equals(this.enumInteger, enumTest.enumInteger) &&
+        Objects.equals(this.enumNumber, enumTest.enumNumber) &&
+        Objects.equals(this.outerEnum, enumTest.outerEnum);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(enumString, enumStringRequired, enumInteger, enumNumber, outerEnum);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class EnumTest {\n");
+    sb.append("    enumString: ").append(toIndentedString(enumString)).append("\n");
+    sb.append("    enumStringRequired: ").append(toIndentedString(enumStringRequired)).append("\n");
+    sb.append("    enumInteger: ").append(toIndentedString(enumInteger)).append("\n");
+    sb.append("    enumNumber: ").append(toIndentedString(enumNumber)).append("\n");
+    sb.append("    outerEnum: ").append(toIndentedString(outerEnum)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/FileSchemaTestClass.java

@@ -0,0 +1,148 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * FileSchemaTestClass
+ */
+@JsonPropertyOrder({
+  FileSchemaTestClass.JSON_PROPERTY_FILE,
+  FileSchemaTestClass.JSON_PROPERTY_FILES
+})
+@JsonTypeName("FileSchemaTestClass")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class FileSchemaTestClass {
+  public static final String JSON_PROPERTY_FILE = "file";
+  private java.io.File file;
+
+  public static final String JSON_PROPERTY_FILES = "files";
+  private List<java.io.File> files = null;
+
+
+  public FileSchemaTestClass file(java.io.File file) {
+    
+    this.file = file;
+    return this;
+  }
+
+   /**
+   * Get file
+   * @return file
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_FILE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public java.io.File getFile() {
+    return file;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_FILE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setFile(java.io.File file) {
+    this.file = file;
+  }
+
+
+  public FileSchemaTestClass files(List<java.io.File> files) {
+    
+    this.files = files;
+    return this;
+  }
+
+  public FileSchemaTestClass addFilesItem(java.io.File filesItem) {
+    if (this.files == null) {
+      this.files = new ArrayList<>();
+    }
+    this.files.add(filesItem);
+    return this;
+  }
+
+   /**
+   * Get files
+   * @return files
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_FILES)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<java.io.File> getFiles() {
+    return files;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_FILES)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setFiles(List<java.io.File> files) {
+    this.files = files;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    FileSchemaTestClass fileSchemaTestClass = (FileSchemaTestClass) o;
+    return Objects.equals(this.file, fileSchemaTestClass.file) &&
+        Objects.equals(this.files, fileSchemaTestClass.files);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(file, files);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class FileSchemaTestClass {\n");
+    sb.append("    file: ").append(toIndentedString(file)).append("\n");
+    sb.append("    files: ").append(toIndentedString(files)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/FormatTest.java

@@ -0,0 +1,549 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.File;
+import java.math.BigDecimal;
+import java.util.UUID;
+import org.threeten.bp.LocalDate;
+import org.threeten.bp.OffsetDateTime;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * FormatTest
+ */
+@JsonPropertyOrder({
+  FormatTest.JSON_PROPERTY_INTEGER,
+  FormatTest.JSON_PROPERTY_INT32,
+  FormatTest.JSON_PROPERTY_INT64,
+  FormatTest.JSON_PROPERTY_NUMBER,
+  FormatTest.JSON_PROPERTY_FLOAT,
+  FormatTest.JSON_PROPERTY_DOUBLE,
+  FormatTest.JSON_PROPERTY_STRING,
+  FormatTest.JSON_PROPERTY_BYTE,
+  FormatTest.JSON_PROPERTY_BINARY,
+  FormatTest.JSON_PROPERTY_DATE,
+  FormatTest.JSON_PROPERTY_DATE_TIME,
+  FormatTest.JSON_PROPERTY_UUID,
+  FormatTest.JSON_PROPERTY_PASSWORD,
+  FormatTest.JSON_PROPERTY_BIG_DECIMAL
+})
+@JsonTypeName("format_test")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class FormatTest {
+  public static final String JSON_PROPERTY_INTEGER = "integer";
+  private Integer integer;
+
+  public static final String JSON_PROPERTY_INT32 = "int32";
+  private Integer int32;
+
+  public static final String JSON_PROPERTY_INT64 = "int64";
+  private Long int64;
+
+  public static final String JSON_PROPERTY_NUMBER = "number";
+  private BigDecimal number;
+
+  public static final String JSON_PROPERTY_FLOAT = "float";
+  private Float _float;
+
+  public static final String JSON_PROPERTY_DOUBLE = "double";
+  private Double _double;
+
+  public static final String JSON_PROPERTY_STRING = "string";
+  private String string;
+
+  public static final String JSON_PROPERTY_BYTE = "byte";
+  private byte[] _byte;
+
+  public static final String JSON_PROPERTY_BINARY = "binary";
+  private File binary;
+
+  public static final String JSON_PROPERTY_DATE = "date";
+  private LocalDate date;
+
+  public static final String JSON_PROPERTY_DATE_TIME = "dateTime";
+  private OffsetDateTime dateTime;
+
+  public static final String JSON_PROPERTY_UUID = "uuid";
+  private UUID uuid;
+
+  public static final String JSON_PROPERTY_PASSWORD = "password";
+  private String password;
+
+  public static final String JSON_PROPERTY_BIG_DECIMAL = "BigDecimal";
+  private BigDecimal bigDecimal;
+
+
+  public FormatTest integer(Integer integer) {
+    
+    this.integer = integer;
+    return this;
+  }
+
+   /**
+   * Get integer
+   * minimum: 10
+   * maximum: 100
+   * @return integer
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getInteger() {
+    return integer;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_INTEGER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setInteger(Integer integer) {
+    this.integer = integer;
+  }
+
+
+  public FormatTest int32(Integer int32) {
+    
+    this.int32 = int32;
+    return this;
+  }
+
+   /**
+   * Get int32
+   * minimum: 20
+   * maximum: 200
+   * @return int32
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_INT32)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getInt32() {
+    return int32;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_INT32)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setInt32(Integer int32) {
+    this.int32 = int32;
+  }
+
+
+  public FormatTest int64(Long int64) {
+    
+    this.int64 = int64;
+    return this;
+  }
+
+   /**
+   * Get int64
+   * @return int64
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_INT64)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getInt64() {
+    return int64;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_INT64)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setInt64(Long int64) {
+    this.int64 = int64;
+  }
+
+
+  public FormatTest number(BigDecimal number) {
+    
+    this.number = number;
+    return this;
+  }
+
+   /**
+   * Get number
+   * minimum: 32.1
+   * maximum: 543.2
+   * @return number
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public BigDecimal getNumber() {
+    return number;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setNumber(BigDecimal number) {
+    this.number = number;
+  }
+
+
+  public FormatTest _float(Float _float) {
+    
+    this._float = _float;
+    return this;
+  }
+
+   /**
+   * Get _float
+   * minimum: 54.3
+   * maximum: 987.6
+   * @return _float
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_FLOAT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Float getFloat() {
+    return _float;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_FLOAT)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setFloat(Float _float) {
+    this._float = _float;
+  }
+
+
+  public FormatTest _double(Double _double) {
+    
+    this._double = _double;
+    return this;
+  }
+
+   /**
+   * Get _double
+   * minimum: 67.8
+   * maximum: 123.4
+   * @return _double
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DOUBLE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Double getDouble() {
+    return _double;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DOUBLE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setDouble(Double _double) {
+    this._double = _double;
+  }
+
+
+  public FormatTest string(String string) {
+    
+    this.string = string;
+    return this;
+  }
+
+   /**
+   * Get string
+   * @return string
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getString() {
+    return string;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setString(String string) {
+    this.string = string;
+  }
+
+
+  public FormatTest _byte(byte[] _byte) {
+    
+    this._byte = _byte;
+    return this;
+  }
+
+   /**
+   * Get _byte
+   * @return _byte
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_BYTE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public byte[] getByte() {
+    return _byte;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_BYTE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setByte(byte[] _byte) {
+    this._byte = _byte;
+  }
+
+
+  public FormatTest binary(File binary) {
+    
+    this.binary = binary;
+    return this;
+  }
+
+   /**
+   * Get binary
+   * @return binary
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BINARY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public File getBinary() {
+    return binary;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_BINARY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setBinary(File binary) {
+    this.binary = binary;
+  }
+
+
+  public FormatTest date(LocalDate date) {
+    
+    this.date = date;
+    return this;
+  }
+
+   /**
+   * Get date
+   * @return date
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_DATE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public LocalDate getDate() {
+    return date;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DATE)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setDate(LocalDate date) {
+    this.date = date;
+  }
+
+
+  public FormatTest dateTime(OffsetDateTime dateTime) {
+    
+    this.dateTime = dateTime;
+    return this;
+  }
+
+   /**
+   * Get dateTime
+   * @return dateTime
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DATE_TIME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OffsetDateTime getDateTime() {
+    return dateTime;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DATE_TIME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setDateTime(OffsetDateTime dateTime) {
+    this.dateTime = dateTime;
+  }
+
+
+  public FormatTest uuid(UUID uuid) {
+    
+    this.uuid = uuid;
+    return this;
+  }
+
+   /**
+   * Get uuid
+   * @return uuid
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(example = "72f98069-206d-4f12-9f12-3d1e525a8e84", value = "")
+  @JsonProperty(JSON_PROPERTY_UUID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public UUID getUuid() {
+    return uuid;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_UUID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setUuid(UUID uuid) {
+    this.uuid = uuid;
+  }
+
+
+  public FormatTest password(String password) {
+    
+    this.password = password;
+    return this;
+  }
+
+   /**
+   * Get password
+   * @return password
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_PASSWORD)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getPassword() {
+    return password;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_PASSWORD)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setPassword(String password) {
+    this.password = password;
+  }
+
+
+  public FormatTest bigDecimal(BigDecimal bigDecimal) {
+    
+    this.bigDecimal = bigDecimal;
+    return this;
+  }
+
+   /**
+   * Get bigDecimal
+   * @return bigDecimal
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BIG_DECIMAL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public BigDecimal getBigDecimal() {
+    return bigDecimal;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_BIG_DECIMAL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setBigDecimal(BigDecimal bigDecimal) {
+    this.bigDecimal = bigDecimal;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    FormatTest formatTest = (FormatTest) o;
+    return Objects.equals(this.integer, formatTest.integer) &&
+        Objects.equals(this.int32, formatTest.int32) &&
+        Objects.equals(this.int64, formatTest.int64) &&
+        Objects.equals(this.number, formatTest.number) &&
+        Objects.equals(this._float, formatTest._float) &&
+        Objects.equals(this._double, formatTest._double) &&
+        Objects.equals(this.string, formatTest.string) &&
+        Arrays.equals(this._byte, formatTest._byte) &&
+        Objects.equals(this.binary, formatTest.binary) &&
+        Objects.equals(this.date, formatTest.date) &&
+        Objects.equals(this.dateTime, formatTest.dateTime) &&
+        Objects.equals(this.uuid, formatTest.uuid) &&
+        Objects.equals(this.password, formatTest.password) &&
+        Objects.equals(this.bigDecimal, formatTest.bigDecimal);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(integer, int32, int64, number, _float, _double, string, Arrays.hashCode(_byte), binary, date, dateTime, uuid, password, bigDecimal);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class FormatTest {\n");
+    sb.append("    integer: ").append(toIndentedString(integer)).append("\n");
+    sb.append("    int32: ").append(toIndentedString(int32)).append("\n");
+    sb.append("    int64: ").append(toIndentedString(int64)).append("\n");
+    sb.append("    number: ").append(toIndentedString(number)).append("\n");
+    sb.append("    _float: ").append(toIndentedString(_float)).append("\n");
+    sb.append("    _double: ").append(toIndentedString(_double)).append("\n");
+    sb.append("    string: ").append(toIndentedString(string)).append("\n");
+    sb.append("    _byte: ").append(toIndentedString(_byte)).append("\n");
+    sb.append("    binary: ").append(toIndentedString(binary)).append("\n");
+    sb.append("    date: ").append(toIndentedString(date)).append("\n");
+    sb.append("    dateTime: ").append(toIndentedString(dateTime)).append("\n");
+    sb.append("    uuid: ").append(toIndentedString(uuid)).append("\n");
+    sb.append("    password: ").append(toIndentedString(password)).append("\n");
+    sb.append("    bigDecimal: ").append(toIndentedString(bigDecimal)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/HasOnlyReadOnly.java

@@ -0,0 +1,116 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * HasOnlyReadOnly
+ */
+@JsonPropertyOrder({
+  HasOnlyReadOnly.JSON_PROPERTY_BAR,
+  HasOnlyReadOnly.JSON_PROPERTY_FOO
+})
+@JsonTypeName("hasOnlyReadOnly")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class HasOnlyReadOnly {
+  public static final String JSON_PROPERTY_BAR = "bar";
+  private String bar;
+
+  public static final String JSON_PROPERTY_FOO = "foo";
+  private String foo;
+
+
+   /**
+   * Get bar
+   * @return bar
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BAR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBar() {
+    return bar;
+  }
+
+
+
+
+   /**
+   * Get foo
+   * @return foo
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_FOO)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getFoo() {
+    return foo;
+  }
+
+
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    HasOnlyReadOnly hasOnlyReadOnly = (HasOnlyReadOnly) o;
+    return Objects.equals(this.bar, hasOnlyReadOnly.bar) &&
+        Objects.equals(this.foo, hasOnlyReadOnly.foo);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(bar, foo);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class HasOnlyReadOnly {\n");
+    sb.append("    bar: ").append(toIndentedString(bar)).append("\n");
+    sb.append("    foo: ").append(toIndentedString(foo)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/MapTest.java

@@ -0,0 +1,274 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * MapTest
+ */
+@JsonPropertyOrder({
+  MapTest.JSON_PROPERTY_MAP_MAP_OF_STRING,
+  MapTest.JSON_PROPERTY_MAP_OF_ENUM_STRING,
+  MapTest.JSON_PROPERTY_DIRECT_MAP,
+  MapTest.JSON_PROPERTY_INDIRECT_MAP
+})
+@JsonTypeName("MapTest")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class MapTest {
+  public static final String JSON_PROPERTY_MAP_MAP_OF_STRING = "map_map_of_string";
+  private Map<String, Map<String, String>> mapMapOfString = null;
+
+  /**
+   * Gets or Sets inner
+   */
+  public enum InnerEnum {
+    UPPER("UPPER"),
+    
+    LOWER("lower");
+
+    private String value;
+
+    InnerEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static InnerEnum fromValue(String value) {
+      for (InnerEnum b : InnerEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_MAP_OF_ENUM_STRING = "map_of_enum_string";
+  private Map<String, InnerEnum> mapOfEnumString = null;
+
+  public static final String JSON_PROPERTY_DIRECT_MAP = "direct_map";
+  private Map<String, Boolean> directMap = null;
+
+  public static final String JSON_PROPERTY_INDIRECT_MAP = "indirect_map";
+  private Map<String, Boolean> indirectMap = null;
+
+
+  public MapTest mapMapOfString(Map<String, Map<String, String>> mapMapOfString) {
+    
+    this.mapMapOfString = mapMapOfString;
+    return this;
+  }
+
+  public MapTest putMapMapOfStringItem(String key, Map<String, String> mapMapOfStringItem) {
+    if (this.mapMapOfString == null) {
+      this.mapMapOfString = new HashMap<>();
+    }
+    this.mapMapOfString.put(key, mapMapOfStringItem);
+    return this;
+  }
+
+   /**
+   * Get mapMapOfString
+   * @return mapMapOfString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_MAP_OF_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Map<String, String>> getMapMapOfString() {
+    return mapMapOfString;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP_MAP_OF_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMapMapOfString(Map<String, Map<String, String>> mapMapOfString) {
+    this.mapMapOfString = mapMapOfString;
+  }
+
+
+  public MapTest mapOfEnumString(Map<String, InnerEnum> mapOfEnumString) {
+    
+    this.mapOfEnumString = mapOfEnumString;
+    return this;
+  }
+
+  public MapTest putMapOfEnumStringItem(String key, InnerEnum mapOfEnumStringItem) {
+    if (this.mapOfEnumString == null) {
+      this.mapOfEnumString = new HashMap<>();
+    }
+    this.mapOfEnumString.put(key, mapOfEnumStringItem);
+    return this;
+  }
+
+   /**
+   * Get mapOfEnumString
+   * @return mapOfEnumString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP_OF_ENUM_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, InnerEnum> getMapOfEnumString() {
+    return mapOfEnumString;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP_OF_ENUM_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMapOfEnumString(Map<String, InnerEnum> mapOfEnumString) {
+    this.mapOfEnumString = mapOfEnumString;
+  }
+
+
+  public MapTest directMap(Map<String, Boolean> directMap) {
+    
+    this.directMap = directMap;
+    return this;
+  }
+
+  public MapTest putDirectMapItem(String key, Boolean directMapItem) {
+    if (this.directMap == null) {
+      this.directMap = new HashMap<>();
+    }
+    this.directMap.put(key, directMapItem);
+    return this;
+  }
+
+   /**
+   * Get directMap
+   * @return directMap
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DIRECT_MAP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Boolean> getDirectMap() {
+    return directMap;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DIRECT_MAP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setDirectMap(Map<String, Boolean> directMap) {
+    this.directMap = directMap;
+  }
+
+
+  public MapTest indirectMap(Map<String, Boolean> indirectMap) {
+    
+    this.indirectMap = indirectMap;
+    return this;
+  }
+
+  public MapTest putIndirectMapItem(String key, Boolean indirectMapItem) {
+    if (this.indirectMap == null) {
+      this.indirectMap = new HashMap<>();
+    }
+    this.indirectMap.put(key, indirectMapItem);
+    return this;
+  }
+
+   /**
+   * Get indirectMap
+   * @return indirectMap
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_INDIRECT_MAP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Boolean> getIndirectMap() {
+    return indirectMap;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_INDIRECT_MAP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setIndirectMap(Map<String, Boolean> indirectMap) {
+    this.indirectMap = indirectMap;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    MapTest mapTest = (MapTest) o;
+    return Objects.equals(this.mapMapOfString, mapTest.mapMapOfString) &&
+        Objects.equals(this.mapOfEnumString, mapTest.mapOfEnumString) &&
+        Objects.equals(this.directMap, mapTest.directMap) &&
+        Objects.equals(this.indirectMap, mapTest.indirectMap);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(mapMapOfString, mapOfEnumString, directMap, indirectMap);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class MapTest {\n");
+    sb.append("    mapMapOfString: ").append(toIndentedString(mapMapOfString)).append("\n");
+    sb.append("    mapOfEnumString: ").append(toIndentedString(mapOfEnumString)).append("\n");
+    sb.append("    directMap: ").append(toIndentedString(directMap)).append("\n");
+    sb.append("    indirectMap: ").append(toIndentedString(indirectMap)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/MixedPropertiesAndAdditionalPropertiesClass.java

@@ -0,0 +1,185 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import org.openapitools.client.model.Animal;
+import org.threeten.bp.OffsetDateTime;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * MixedPropertiesAndAdditionalPropertiesClass
+ */
+@JsonPropertyOrder({
+  MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_UUID,
+  MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_DATE_TIME,
+  MixedPropertiesAndAdditionalPropertiesClass.JSON_PROPERTY_MAP
+})
+@JsonTypeName("MixedPropertiesAndAdditionalPropertiesClass")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class MixedPropertiesAndAdditionalPropertiesClass {
+  public static final String JSON_PROPERTY_UUID = "uuid";
+  private UUID uuid;
+
+  public static final String JSON_PROPERTY_DATE_TIME = "dateTime";
+  private OffsetDateTime dateTime;
+
+  public static final String JSON_PROPERTY_MAP = "map";
+  private Map<String, Animal> map = null;
+
+
+  public MixedPropertiesAndAdditionalPropertiesClass uuid(UUID uuid) {
+    
+    this.uuid = uuid;
+    return this;
+  }
+
+   /**
+   * Get uuid
+   * @return uuid
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_UUID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public UUID getUuid() {
+    return uuid;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_UUID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setUuid(UUID uuid) {
+    this.uuid = uuid;
+  }
+
+
+  public MixedPropertiesAndAdditionalPropertiesClass dateTime(OffsetDateTime dateTime) {
+    
+    this.dateTime = dateTime;
+    return this;
+  }
+
+   /**
+   * Get dateTime
+   * @return dateTime
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_DATE_TIME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OffsetDateTime getDateTime() {
+    return dateTime;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_DATE_TIME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setDateTime(OffsetDateTime dateTime) {
+    this.dateTime = dateTime;
+  }
+
+
+  public MixedPropertiesAndAdditionalPropertiesClass map(Map<String, Animal> map) {
+    
+    this.map = map;
+    return this;
+  }
+
+  public MixedPropertiesAndAdditionalPropertiesClass putMapItem(String key, Animal mapItem) {
+    if (this.map == null) {
+      this.map = new HashMap<>();
+    }
+    this.map.put(key, mapItem);
+    return this;
+  }
+
+   /**
+   * Get map
+   * @return map
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MAP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Map<String, Animal> getMap() {
+    return map;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MAP)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMap(Map<String, Animal> map) {
+    this.map = map;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    MixedPropertiesAndAdditionalPropertiesClass mixedPropertiesAndAdditionalPropertiesClass = (MixedPropertiesAndAdditionalPropertiesClass) o;
+    return Objects.equals(this.uuid, mixedPropertiesAndAdditionalPropertiesClass.uuid) &&
+        Objects.equals(this.dateTime, mixedPropertiesAndAdditionalPropertiesClass.dateTime) &&
+        Objects.equals(this.map, mixedPropertiesAndAdditionalPropertiesClass.map);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(uuid, dateTime, map);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class MixedPropertiesAndAdditionalPropertiesClass {\n");
+    sb.append("    uuid: ").append(toIndentedString(uuid)).append("\n");
+    sb.append("    dateTime: ").append(toIndentedString(dateTime)).append("\n");
+    sb.append("    map: ").append(toIndentedString(map)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Model200Response.java

@@ -0,0 +1,139 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Model for testing model name starting with number
+ */
+@ApiModel(description = "Model for testing model name starting with number")
+@JsonPropertyOrder({
+  Model200Response.JSON_PROPERTY_NAME,
+  Model200Response.JSON_PROPERTY_PROPERTY_CLASS
+})
+@JsonTypeName("200_response")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Model200Response {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private Integer name;
+
+  public static final String JSON_PROPERTY_PROPERTY_CLASS = "class";
+  private String propertyClass;
+
+
+  public Model200Response name(Integer name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(Integer name) {
+    this.name = name;
+  }
+
+
+  public Model200Response propertyClass(String propertyClass) {
+    
+    this.propertyClass = propertyClass;
+    return this;
+  }
+
+   /**
+   * Get propertyClass
+   * @return propertyClass
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_PROPERTY_CLASS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getPropertyClass() {
+    return propertyClass;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_PROPERTY_CLASS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setPropertyClass(String propertyClass) {
+    this.propertyClass = propertyClass;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Model200Response _200response = (Model200Response) o;
+    return Objects.equals(this.name, _200response.name) &&
+        Objects.equals(this.propertyClass, _200response.propertyClass);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, propertyClass);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Model200Response {\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("    propertyClass: ").append(toIndentedString(propertyClass)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/ModelApiResponse.java

@@ -0,0 +1,171 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ModelApiResponse
+ */
+@JsonPropertyOrder({
+  ModelApiResponse.JSON_PROPERTY_CODE,
+  ModelApiResponse.JSON_PROPERTY_TYPE,
+  ModelApiResponse.JSON_PROPERTY_MESSAGE
+})
+@JsonTypeName("ApiResponse")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ModelApiResponse {
+  public static final String JSON_PROPERTY_CODE = "code";
+  private Integer code;
+
+  public static final String JSON_PROPERTY_TYPE = "type";
+  private String type;
+
+  public static final String JSON_PROPERTY_MESSAGE = "message";
+  private String message;
+
+
+  public ModelApiResponse code(Integer code) {
+    
+    this.code = code;
+    return this;
+  }
+
+   /**
+   * Get code
+   * @return code
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CODE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getCode() {
+    return code;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_CODE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setCode(Integer code) {
+    this.code = code;
+  }
+
+
+  public ModelApiResponse type(String type) {
+    
+    this.type = type;
+    return this;
+  }
+
+   /**
+   * Get type
+   * @return type
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_TYPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getType() {
+    return type;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_TYPE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setType(String type) {
+    this.type = type;
+  }
+
+
+  public ModelApiResponse message(String message) {
+    
+    this.message = message;
+    return this;
+  }
+
+   /**
+   * Get message
+   * @return message
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MESSAGE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getMessage() {
+    return message;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MESSAGE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMessage(String message) {
+    this.message = message;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ModelApiResponse _apiResponse = (ModelApiResponse) o;
+    return Objects.equals(this.code, _apiResponse.code) &&
+        Objects.equals(this.type, _apiResponse.type) &&
+        Objects.equals(this.message, _apiResponse.message);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(code, type, message);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ModelApiResponse {\n");
+    sb.append("    code: ").append(toIndentedString(code)).append("\n");
+    sb.append("    type: ").append(toIndentedString(type)).append("\n");
+    sb.append("    message: ").append(toIndentedString(message)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/ModelReturn.java

@@ -0,0 +1,106 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Model for testing reserved words
+ */
+@ApiModel(description = "Model for testing reserved words")
+@JsonPropertyOrder({
+  ModelReturn.JSON_PROPERTY_RETURN
+})
+@JsonTypeName("Return")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ModelReturn {
+  public static final String JSON_PROPERTY_RETURN = "return";
+  private Integer _return;
+
+
+  public ModelReturn _return(Integer _return) {
+    
+    this._return = _return;
+    return this;
+  }
+
+   /**
+   * Get _return
+   * @return _return
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_RETURN)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getReturn() {
+    return _return;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_RETURN)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setReturn(Integer _return) {
+    this._return = _return;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ModelReturn _return = (ModelReturn) o;
+    return Objects.equals(this._return, _return._return);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(_return);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ModelReturn {\n");
+    sb.append("    _return: ").append(toIndentedString(_return)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Name.java

@@ -0,0 +1,183 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Model for testing model name same as property name
+ */
+@ApiModel(description = "Model for testing model name same as property name")
+@JsonPropertyOrder({
+  Name.JSON_PROPERTY_NAME,
+  Name.JSON_PROPERTY_SNAKE_CASE,
+  Name.JSON_PROPERTY_PROPERTY,
+  Name.JSON_PROPERTY_123NUMBER
+})
+@JsonTypeName("Name")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Name {
+  public static final String JSON_PROPERTY_NAME = "name";
+  private Integer name;
+
+  public static final String JSON_PROPERTY_SNAKE_CASE = "snake_case";
+  private Integer snakeCase;
+
+  public static final String JSON_PROPERTY_PROPERTY = "property";
+  private String property;
+
+  public static final String JSON_PROPERTY_123NUMBER = "123Number";
+  private Integer _123number;
+
+
+  public Name name(Integer name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public Integer getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setName(Integer name) {
+    this.name = name;
+  }
+
+
+   /**
+   * Get snakeCase
+   * @return snakeCase
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SNAKE_CASE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getSnakeCase() {
+    return snakeCase;
+  }
+
+
+
+
+  public Name property(String property) {
+    
+    this.property = property;
+    return this;
+  }
+
+   /**
+   * Get property
+   * @return property
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_PROPERTY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getProperty() {
+    return property;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_PROPERTY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setProperty(String property) {
+    this.property = property;
+  }
+
+
+   /**
+   * Get _123number
+   * @return _123number
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_123NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer get123number() {
+    return _123number;
+  }
+
+
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Name name = (Name) o;
+    return Objects.equals(this.name, name.name) &&
+        Objects.equals(this.snakeCase, name.snakeCase) &&
+        Objects.equals(this.property, name.property) &&
+        Objects.equals(this._123number, name._123number);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, snakeCase, property, _123number);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Name {\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("    snakeCase: ").append(toIndentedString(snakeCase)).append("\n");
+    sb.append("    property: ").append(toIndentedString(property)).append("\n");
+    sb.append("    _123number: ").append(toIndentedString(_123number)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/NumberOnly.java

@@ -0,0 +1,106 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * NumberOnly
+ */
+@JsonPropertyOrder({
+  NumberOnly.JSON_PROPERTY_JUST_NUMBER
+})
+@JsonTypeName("NumberOnly")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class NumberOnly {
+  public static final String JSON_PROPERTY_JUST_NUMBER = "JustNumber";
+  private BigDecimal justNumber;
+
+
+  public NumberOnly justNumber(BigDecimal justNumber) {
+    
+    this.justNumber = justNumber;
+    return this;
+  }
+
+   /**
+   * Get justNumber
+   * @return justNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_JUST_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public BigDecimal getJustNumber() {
+    return justNumber;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_JUST_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setJustNumber(BigDecimal justNumber) {
+    this.justNumber = justNumber;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    NumberOnly numberOnly = (NumberOnly) o;
+    return Objects.equals(this.justNumber, numberOnly.justNumber);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(justNumber);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class NumberOnly {\n");
+    sb.append("    justNumber: ").append(toIndentedString(justNumber)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Order.java

@@ -0,0 +1,308 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.threeten.bp.OffsetDateTime;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Order
+ */
+@JsonPropertyOrder({
+  Order.JSON_PROPERTY_ID,
+  Order.JSON_PROPERTY_PET_ID,
+  Order.JSON_PROPERTY_QUANTITY,
+  Order.JSON_PROPERTY_SHIP_DATE,
+  Order.JSON_PROPERTY_STATUS,
+  Order.JSON_PROPERTY_COMPLETE
+})
+@JsonTypeName("Order")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Order {
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_PET_ID = "petId";
+  private Long petId;
+
+  public static final String JSON_PROPERTY_QUANTITY = "quantity";
+  private Integer quantity;
+
+  public static final String JSON_PROPERTY_SHIP_DATE = "shipDate";
+  private OffsetDateTime shipDate;
+
+  /**
+   * Order Status
+   */
+  public enum StatusEnum {
+    PLACED("placed"),
+    
+    APPROVED("approved"),
+    
+    DELIVERED("delivered");
+
+    private String value;
+
+    StatusEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static StatusEnum fromValue(String value) {
+      for (StatusEnum b : StatusEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_STATUS = "status";
+  private StatusEnum status;
+
+  public static final String JSON_PROPERTY_COMPLETE = "complete";
+  private Boolean complete = false;
+
+
+  public Order id(Long id) {
+    
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public Order petId(Long petId) {
+    
+    this.petId = petId;
+    return this;
+  }
+
+   /**
+   * Get petId
+   * @return petId
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_PET_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getPetId() {
+    return petId;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_PET_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setPetId(Long petId) {
+    this.petId = petId;
+  }
+
+
+  public Order quantity(Integer quantity) {
+    
+    this.quantity = quantity;
+    return this;
+  }
+
+   /**
+   * Get quantity
+   * @return quantity
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_QUANTITY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getQuantity() {
+    return quantity;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_QUANTITY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setQuantity(Integer quantity) {
+    this.quantity = quantity;
+  }
+
+
+  public Order shipDate(OffsetDateTime shipDate) {
+    
+    this.shipDate = shipDate;
+    return this;
+  }
+
+   /**
+   * Get shipDate
+   * @return shipDate
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_SHIP_DATE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public OffsetDateTime getShipDate() {
+    return shipDate;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_SHIP_DATE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setShipDate(OffsetDateTime shipDate) {
+    this.shipDate = shipDate;
+  }
+
+
+  public Order status(StatusEnum status) {
+    
+    this.status = status;
+    return this;
+  }
+
+   /**
+   * Order Status
+   * @return status
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "Order Status")
+  @JsonProperty(JSON_PROPERTY_STATUS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public StatusEnum getStatus() {
+    return status;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_STATUS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setStatus(StatusEnum status) {
+    this.status = status;
+  }
+
+
+  public Order complete(Boolean complete) {
+    
+    this.complete = complete;
+    return this;
+  }
+
+   /**
+   * Get complete
+   * @return complete
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_COMPLETE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Boolean getComplete() {
+    return complete;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_COMPLETE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setComplete(Boolean complete) {
+    this.complete = complete;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Order order = (Order) o;
+    return Objects.equals(this.id, order.id) &&
+        Objects.equals(this.petId, order.petId) &&
+        Objects.equals(this.quantity, order.quantity) &&
+        Objects.equals(this.shipDate, order.shipDate) &&
+        Objects.equals(this.status, order.status) &&
+        Objects.equals(this.complete, order.complete);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, petId, quantity, shipDate, status, complete);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Order {\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    petId: ").append(toIndentedString(petId)).append("\n");
+    sb.append("    quantity: ").append(toIndentedString(quantity)).append("\n");
+    sb.append("    shipDate: ").append(toIndentedString(shipDate)).append("\n");
+    sb.append("    status: ").append(toIndentedString(status)).append("\n");
+    sb.append("    complete: ").append(toIndentedString(complete)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/OuterComposite.java

@@ -0,0 +1,172 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * OuterComposite
+ */
+@JsonPropertyOrder({
+  OuterComposite.JSON_PROPERTY_MY_NUMBER,
+  OuterComposite.JSON_PROPERTY_MY_STRING,
+  OuterComposite.JSON_PROPERTY_MY_BOOLEAN
+})
+@JsonTypeName("OuterComposite")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class OuterComposite {
+  public static final String JSON_PROPERTY_MY_NUMBER = "my_number";
+  private BigDecimal myNumber;
+
+  public static final String JSON_PROPERTY_MY_STRING = "my_string";
+  private String myString;
+
+  public static final String JSON_PROPERTY_MY_BOOLEAN = "my_boolean";
+  private Boolean myBoolean;
+
+
+  public OuterComposite myNumber(BigDecimal myNumber) {
+    
+    this.myNumber = myNumber;
+    return this;
+  }
+
+   /**
+   * Get myNumber
+   * @return myNumber
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public BigDecimal getMyNumber() {
+    return myNumber;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MY_NUMBER)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMyNumber(BigDecimal myNumber) {
+    this.myNumber = myNumber;
+  }
+
+
+  public OuterComposite myString(String myString) {
+    
+    this.myString = myString;
+    return this;
+  }
+
+   /**
+   * Get myString
+   * @return myString
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MY_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getMyString() {
+    return myString;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MY_STRING)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMyString(String myString) {
+    this.myString = myString;
+  }
+
+
+  public OuterComposite myBoolean(Boolean myBoolean) {
+    
+    this.myBoolean = myBoolean;
+    return this;
+  }
+
+   /**
+   * Get myBoolean
+   * @return myBoolean
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_MY_BOOLEAN)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Boolean getMyBoolean() {
+    return myBoolean;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_MY_BOOLEAN)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setMyBoolean(Boolean myBoolean) {
+    this.myBoolean = myBoolean;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    OuterComposite outerComposite = (OuterComposite) o;
+    return Objects.equals(this.myNumber, outerComposite.myNumber) &&
+        Objects.equals(this.myString, outerComposite.myString) &&
+        Objects.equals(this.myBoolean, outerComposite.myBoolean);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(myNumber, myString, myBoolean);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class OuterComposite {\n");
+    sb.append("    myNumber: ").append(toIndentedString(myNumber)).append("\n");
+    sb.append("    myString: ").append(toIndentedString(myString)).append("\n");
+    sb.append("    myBoolean: ").append(toIndentedString(myBoolean)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/OuterEnum.java

@@ -0,0 +1,60 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Gets or Sets OuterEnum
+ */
+public enum OuterEnum {
+  
+  PLACED("placed"),
+  
+  APPROVED("approved"),
+  
+  DELIVERED("delivered");
+
+  private String value;
+
+  OuterEnum(String value) {
+    this.value = value;
+  }
+
+  @JsonValue
+  public String getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+
+  @JsonCreator
+  public static OuterEnum fromValue(String value) {
+    for (OuterEnum b : OuterEnum.values()) {
+      if (b.value.equals(value)) {
+        return b;
+      }
+    }
+    throw new IllegalArgumentException("Unexpected value '" + value + "'");
+  }
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Pet.java

@@ -0,0 +1,326 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
+import org.openapitools.client.model.Category;
+import org.openapitools.client.model.Tag;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Pet
+ */
+@JsonPropertyOrder({
+  Pet.JSON_PROPERTY_ID,
+  Pet.JSON_PROPERTY_CATEGORY,
+  Pet.JSON_PROPERTY_NAME,
+  Pet.JSON_PROPERTY_PHOTO_URLS,
+  Pet.JSON_PROPERTY_TAGS,
+  Pet.JSON_PROPERTY_STATUS
+})
+@JsonTypeName("Pet")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Pet {
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_CATEGORY = "category";
+  private Category category;
+
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+  public static final String JSON_PROPERTY_PHOTO_URLS = "photoUrls";
+  private Set<String> photoUrls = new LinkedHashSet<>();
+
+  public static final String JSON_PROPERTY_TAGS = "tags";
+  private List<Tag> tags = null;
+
+  /**
+   * pet status in the store
+   */
+  public enum StatusEnum {
+    AVAILABLE("available"),
+    
+    PENDING("pending"),
+    
+    SOLD("sold");
+
+    private String value;
+
+    StatusEnum(String value) {
+      this.value = value;
+    }
+
+    @JsonValue
+    public String getValue() {
+      return value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+
+    @JsonCreator
+    public static StatusEnum fromValue(String value) {
+      for (StatusEnum b : StatusEnum.values()) {
+        if (b.value.equals(value)) {
+          return b;
+        }
+      }
+      throw new IllegalArgumentException("Unexpected value '" + value + "'");
+    }
+  }
+
+  public static final String JSON_PROPERTY_STATUS = "status";
+  private StatusEnum status;
+
+
+  public Pet id(Long id) {
+    
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public Pet category(Category category) {
+    
+    this.category = category;
+    return this;
+  }
+
+   /**
+   * Get category
+   * @return category
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_CATEGORY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Category getCategory() {
+    return category;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_CATEGORY)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setCategory(Category category) {
+    this.category = category;
+  }
+
+
+  public Pet name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(example = "doggie", required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  public Pet photoUrls(Set<String> photoUrls) {
+    
+    this.photoUrls = photoUrls;
+    return this;
+  }
+
+  public Pet addPhotoUrlsItem(String photoUrlsItem) {
+    this.photoUrls.add(photoUrlsItem);
+    return this;
+  }
+
+   /**
+   * Get photoUrls
+   * @return photoUrls
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_PHOTO_URLS)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public Set<String> getPhotoUrls() {
+    return photoUrls;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_PHOTO_URLS)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setPhotoUrls(Set<String> photoUrls) {
+    this.photoUrls = photoUrls;
+  }
+
+
+  public Pet tags(List<Tag> tags) {
+    
+    this.tags = tags;
+    return this;
+  }
+
+  public Pet addTagsItem(Tag tagsItem) {
+    if (this.tags == null) {
+      this.tags = new ArrayList<>();
+    }
+    this.tags.add(tagsItem);
+    return this;
+  }
+
+   /**
+   * Get tags
+   * @return tags
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_TAGS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public List<Tag> getTags() {
+    return tags;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_TAGS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setTags(List<Tag> tags) {
+    this.tags = tags;
+  }
+
+
+  public Pet status(StatusEnum status) {
+    
+    this.status = status;
+    return this;
+  }
+
+   /**
+   * pet status in the store
+   * @return status
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "pet status in the store")
+  @JsonProperty(JSON_PROPERTY_STATUS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public StatusEnum getStatus() {
+    return status;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_STATUS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setStatus(StatusEnum status) {
+    this.status = status;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Pet pet = (Pet) o;
+    return Objects.equals(this.id, pet.id) &&
+        Objects.equals(this.category, pet.category) &&
+        Objects.equals(this.name, pet.name) &&
+        Objects.equals(this.photoUrls, pet.photoUrls) &&
+        Objects.equals(this.tags, pet.tags) &&
+        Objects.equals(this.status, pet.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, category, name, photoUrls, tags, status);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Pet {\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    category: ").append(toIndentedString(category)).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("    photoUrls: ").append(toIndentedString(photoUrls)).append("\n");
+    sb.append("    tags: ").append(toIndentedString(tags)).append("\n");
+    sb.append("    status: ").append(toIndentedString(status)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/ReadOnlyFirst.java

@@ -0,0 +1,127 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * ReadOnlyFirst
+ */
+@JsonPropertyOrder({
+  ReadOnlyFirst.JSON_PROPERTY_BAR,
+  ReadOnlyFirst.JSON_PROPERTY_BAZ
+})
+@JsonTypeName("ReadOnlyFirst")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class ReadOnlyFirst {
+  public static final String JSON_PROPERTY_BAR = "bar";
+  private String bar;
+
+  public static final String JSON_PROPERTY_BAZ = "baz";
+  private String baz;
+
+
+   /**
+   * Get bar
+   * @return bar
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BAR)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBar() {
+    return bar;
+  }
+
+
+
+
+  public ReadOnlyFirst baz(String baz) {
+    
+    this.baz = baz;
+    return this;
+  }
+
+   /**
+   * Get baz
+   * @return baz
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_BAZ)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getBaz() {
+    return baz;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_BAZ)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setBaz(String baz) {
+    this.baz = baz;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ReadOnlyFirst readOnlyFirst = (ReadOnlyFirst) o;
+    return Objects.equals(this.bar, readOnlyFirst.bar) &&
+        Objects.equals(this.baz, readOnlyFirst.baz);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(bar, baz);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class ReadOnlyFirst {\n");
+    sb.append("    bar: ").append(toIndentedString(bar)).append("\n");
+    sb.append("    baz: ").append(toIndentedString(baz)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/SpecialModelName.java

@@ -0,0 +1,105 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * SpecialModelName
+ */
+@JsonPropertyOrder({
+  SpecialModelName.JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME
+})
+@JsonTypeName("$special[model.name]")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class SpecialModelName {
+  public static final String JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME = "$special[property.name]";
+  private Long $specialPropertyName;
+
+
+  public SpecialModelName $specialPropertyName(Long $specialPropertyName) {
+    
+    this.$specialPropertyName = $specialPropertyName;
+    return this;
+  }
+
+   /**
+   * Get $specialPropertyName
+   * @return $specialPropertyName
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long get$SpecialPropertyName() {
+    return $specialPropertyName;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_$_SPECIAL_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void set$SpecialPropertyName(Long $specialPropertyName) {
+    this.$specialPropertyName = $specialPropertyName;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    SpecialModelName $specialModelName = (SpecialModelName) o;
+    return Objects.equals(this.$specialPropertyName, $specialModelName.$specialPropertyName);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash($specialPropertyName);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class SpecialModelName {\n");
+    sb.append("    $specialPropertyName: ").append(toIndentedString($specialPropertyName)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/Tag.java

@@ -0,0 +1,138 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * Tag
+ */
+@JsonPropertyOrder({
+  Tag.JSON_PROPERTY_ID,
+  Tag.JSON_PROPERTY_NAME
+})
+@JsonTypeName("Tag")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class Tag {
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_NAME = "name";
+  private String name;
+
+
+  public Tag id(Long id) {
+    
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public Tag name(String name) {
+    
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getName() {
+    return name;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Tag tag = (Tag) o;
+    return Objects.equals(this.id, tag.id) &&
+        Objects.equals(this.name, tag.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Tag {\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/TypeHolderDefault.java

@@ -0,0 +1,245 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * TypeHolderDefault
+ */
+@JsonPropertyOrder({
+  TypeHolderDefault.JSON_PROPERTY_STRING_ITEM,
+  TypeHolderDefault.JSON_PROPERTY_NUMBER_ITEM,
+  TypeHolderDefault.JSON_PROPERTY_INTEGER_ITEM,
+  TypeHolderDefault.JSON_PROPERTY_BOOL_ITEM,
+  TypeHolderDefault.JSON_PROPERTY_ARRAY_ITEM
+})
+@JsonTypeName("TypeHolderDefault")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class TypeHolderDefault {
+  public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
+  private String stringItem = "what";
+
+  public static final String JSON_PROPERTY_NUMBER_ITEM = "number_item";
+  private BigDecimal numberItem;
+
+  public static final String JSON_PROPERTY_INTEGER_ITEM = "integer_item";
+  private Integer integerItem;
+
+  public static final String JSON_PROPERTY_BOOL_ITEM = "bool_item";
+  private Boolean boolItem = true;
+
+  public static final String JSON_PROPERTY_ARRAY_ITEM = "array_item";
+  private List<Integer> arrayItem = new ArrayList<>();
+
+
+  public TypeHolderDefault stringItem(String stringItem) {
+    
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_STRING_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_STRING_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+
+  public TypeHolderDefault numberItem(BigDecimal numberItem) {
+    
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_NUMBER_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NUMBER_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+
+  public TypeHolderDefault integerItem(Integer integerItem) {
+    
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_INTEGER_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_INTEGER_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+
+  public TypeHolderDefault boolItem(Boolean boolItem) {
+    
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_BOOL_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_BOOL_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+
+  public TypeHolderDefault arrayItem(List<Integer> arrayItem) {
+    
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderDefault addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderDefault typeHolderDefault = (TypeHolderDefault) o;
+    return Objects.equals(this.stringItem, typeHolderDefault.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderDefault.numberItem) &&
+        Objects.equals(this.integerItem, typeHolderDefault.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderDefault.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderDefault.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderDefault {\n");
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/TypeHolderExample.java

@@ -0,0 +1,278 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * TypeHolderExample
+ */
+@JsonPropertyOrder({
+  TypeHolderExample.JSON_PROPERTY_STRING_ITEM,
+  TypeHolderExample.JSON_PROPERTY_NUMBER_ITEM,
+  TypeHolderExample.JSON_PROPERTY_FLOAT_ITEM,
+  TypeHolderExample.JSON_PROPERTY_INTEGER_ITEM,
+  TypeHolderExample.JSON_PROPERTY_BOOL_ITEM,
+  TypeHolderExample.JSON_PROPERTY_ARRAY_ITEM
+})
+@JsonTypeName("TypeHolderExample")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class TypeHolderExample {
+  public static final String JSON_PROPERTY_STRING_ITEM = "string_item";
+  private String stringItem;
+
+  public static final String JSON_PROPERTY_NUMBER_ITEM = "number_item";
+  private BigDecimal numberItem;
+
+  public static final String JSON_PROPERTY_FLOAT_ITEM = "float_item";
+  private Float floatItem;
+
+  public static final String JSON_PROPERTY_INTEGER_ITEM = "integer_item";
+  private Integer integerItem;
+
+  public static final String JSON_PROPERTY_BOOL_ITEM = "bool_item";
+  private Boolean boolItem;
+
+  public static final String JSON_PROPERTY_ARRAY_ITEM = "array_item";
+  private List<Integer> arrayItem = new ArrayList<>();
+
+
+  public TypeHolderExample stringItem(String stringItem) {
+    
+    this.stringItem = stringItem;
+    return this;
+  }
+
+   /**
+   * Get stringItem
+   * @return stringItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(example = "what", required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_STRING_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public String getStringItem() {
+    return stringItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_STRING_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setStringItem(String stringItem) {
+    this.stringItem = stringItem;
+  }
+
+
+  public TypeHolderExample numberItem(BigDecimal numberItem) {
+    
+    this.numberItem = numberItem;
+    return this;
+  }
+
+   /**
+   * Get numberItem
+   * @return numberItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_NUMBER_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public BigDecimal getNumberItem() {
+    return numberItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_NUMBER_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setNumberItem(BigDecimal numberItem) {
+    this.numberItem = numberItem;
+  }
+
+
+  public TypeHolderExample floatItem(Float floatItem) {
+    
+    this.floatItem = floatItem;
+    return this;
+  }
+
+   /**
+   * Get floatItem
+   * @return floatItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(example = "1.234", required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_FLOAT_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public Float getFloatItem() {
+    return floatItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_FLOAT_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setFloatItem(Float floatItem) {
+    this.floatItem = floatItem;
+  }
+
+
+  public TypeHolderExample integerItem(Integer integerItem) {
+    
+    this.integerItem = integerItem;
+    return this;
+  }
+
+   /**
+   * Get integerItem
+   * @return integerItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(example = "-2", required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_INTEGER_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public Integer getIntegerItem() {
+    return integerItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_INTEGER_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setIntegerItem(Integer integerItem) {
+    this.integerItem = integerItem;
+  }
+
+
+  public TypeHolderExample boolItem(Boolean boolItem) {
+    
+    this.boolItem = boolItem;
+    return this;
+  }
+
+   /**
+   * Get boolItem
+   * @return boolItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(example = "true", required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_BOOL_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public Boolean getBoolItem() {
+    return boolItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_BOOL_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setBoolItem(Boolean boolItem) {
+    this.boolItem = boolItem;
+  }
+
+
+  public TypeHolderExample arrayItem(List<Integer> arrayItem) {
+    
+    this.arrayItem = arrayItem;
+    return this;
+  }
+
+  public TypeHolderExample addArrayItemItem(Integer arrayItemItem) {
+    this.arrayItem.add(arrayItemItem);
+    return this;
+  }
+
+   /**
+   * Get arrayItem
+   * @return arrayItem
+  **/
+  @javax.annotation.Nonnull
+  @ApiModelProperty(example = "[0, 1, 2, 3]", required = true, value = "")
+  @JsonProperty(JSON_PROPERTY_ARRAY_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+
+  public List<Integer> getArrayItem() {
+    return arrayItem;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ARRAY_ITEM)
+  @JsonInclude(value = JsonInclude.Include.ALWAYS)
+  public void setArrayItem(List<Integer> arrayItem) {
+    this.arrayItem = arrayItem;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    TypeHolderExample typeHolderExample = (TypeHolderExample) o;
+    return Objects.equals(this.stringItem, typeHolderExample.stringItem) &&
+        Objects.equals(this.numberItem, typeHolderExample.numberItem) &&
+        Objects.equals(this.floatItem, typeHolderExample.floatItem) &&
+        Objects.equals(this.integerItem, typeHolderExample.integerItem) &&
+        Objects.equals(this.boolItem, typeHolderExample.boolItem) &&
+        Objects.equals(this.arrayItem, typeHolderExample.arrayItem);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(stringItem, numberItem, floatItem, integerItem, boolItem, arrayItem);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class TypeHolderExample {\n");
+    sb.append("    stringItem: ").append(toIndentedString(stringItem)).append("\n");
+    sb.append("    numberItem: ").append(toIndentedString(numberItem)).append("\n");
+    sb.append("    floatItem: ").append(toIndentedString(floatItem)).append("\n");
+    sb.append("    integerItem: ").append(toIndentedString(integerItem)).append("\n");
+    sb.append("    boolItem: ").append(toIndentedString(boolItem)).append("\n");
+    sb.append("    arrayItem: ").append(toIndentedString(arrayItem)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/main/java/org/openapitools/client/model/User.java

@@ -0,0 +1,336 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import java.util.Objects;
+import java.util.Arrays;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+/**
+ * User
+ */
+@JsonPropertyOrder({
+  User.JSON_PROPERTY_ID,
+  User.JSON_PROPERTY_USERNAME,
+  User.JSON_PROPERTY_FIRST_NAME,
+  User.JSON_PROPERTY_LAST_NAME,
+  User.JSON_PROPERTY_EMAIL,
+  User.JSON_PROPERTY_PASSWORD,
+  User.JSON_PROPERTY_PHONE,
+  User.JSON_PROPERTY_USER_STATUS
+})
+@JsonTypeName("User")
+@javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
+public class User {
+  public static final String JSON_PROPERTY_ID = "id";
+  private Long id;
+
+  public static final String JSON_PROPERTY_USERNAME = "username";
+  private String username;
+
+  public static final String JSON_PROPERTY_FIRST_NAME = "firstName";
+  private String firstName;
+
+  public static final String JSON_PROPERTY_LAST_NAME = "lastName";
+  private String lastName;
+
+  public static final String JSON_PROPERTY_EMAIL = "email";
+  private String email;
+
+  public static final String JSON_PROPERTY_PASSWORD = "password";
+  private String password;
+
+  public static final String JSON_PROPERTY_PHONE = "phone";
+  private String phone;
+
+  public static final String JSON_PROPERTY_USER_STATUS = "userStatus";
+  private Integer userStatus;
+
+
+  public User id(Long id) {
+    
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Long getId() {
+    return id;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_ID)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+
+  public User username(String username) {
+    
+    this.username = username;
+    return this;
+  }
+
+   /**
+   * Get username
+   * @return username
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_USERNAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getUsername() {
+    return username;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_USERNAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setUsername(String username) {
+    this.username = username;
+  }
+
+
+  public User firstName(String firstName) {
+    
+    this.firstName = firstName;
+    return this;
+  }
+
+   /**
+   * Get firstName
+   * @return firstName
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_FIRST_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getFirstName() {
+    return firstName;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_FIRST_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setFirstName(String firstName) {
+    this.firstName = firstName;
+  }
+
+
+  public User lastName(String lastName) {
+    
+    this.lastName = lastName;
+    return this;
+  }
+
+   /**
+   * Get lastName
+   * @return lastName
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_LAST_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getLastName() {
+    return lastName;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_LAST_NAME)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setLastName(String lastName) {
+    this.lastName = lastName;
+  }
+
+
+  public User email(String email) {
+    
+    this.email = email;
+    return this;
+  }
+
+   /**
+   * Get email
+   * @return email
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_EMAIL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getEmail() {
+    return email;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_EMAIL)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setEmail(String email) {
+    this.email = email;
+  }
+
+
+  public User password(String password) {
+    
+    this.password = password;
+    return this;
+  }
+
+   /**
+   * Get password
+   * @return password
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_PASSWORD)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getPassword() {
+    return password;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_PASSWORD)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setPassword(String password) {
+    this.password = password;
+  }
+
+
+  public User phone(String phone) {
+    
+    this.phone = phone;
+    return this;
+  }
+
+   /**
+   * Get phone
+   * @return phone
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "")
+  @JsonProperty(JSON_PROPERTY_PHONE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public String getPhone() {
+    return phone;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_PHONE)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setPhone(String phone) {
+    this.phone = phone;
+  }
+
+
+  public User userStatus(Integer userStatus) {
+    
+    this.userStatus = userStatus;
+    return this;
+  }
+
+   /**
+   * User Status
+   * @return userStatus
+  **/
+  @javax.annotation.Nullable
+  @ApiModelProperty(value = "User Status")
+  @JsonProperty(JSON_PROPERTY_USER_STATUS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+
+  public Integer getUserStatus() {
+    return userStatus;
+  }
+
+
+  @JsonProperty(JSON_PROPERTY_USER_STATUS)
+  @JsonInclude(value = JsonInclude.Include.USE_DEFAULTS)
+  public void setUserStatus(Integer userStatus) {
+    this.userStatus = userStatus;
+  }
+
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    User user = (User) o;
+    return Objects.equals(this.id, user.id) &&
+        Objects.equals(this.username, user.username) &&
+        Objects.equals(this.firstName, user.firstName) &&
+        Objects.equals(this.lastName, user.lastName) &&
+        Objects.equals(this.email, user.email) &&
+        Objects.equals(this.password, user.password) &&
+        Objects.equals(this.phone, user.phone) &&
+        Objects.equals(this.userStatus, user.userStatus);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, username, firstName, lastName, email, password, phone, userStatus);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class User {\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    username: ").append(toIndentedString(username)).append("\n");
+    sb.append("    firstName: ").append(toIndentedString(firstName)).append("\n");
+    sb.append("    lastName: ").append(toIndentedString(lastName)).append("\n");
+    sb.append("    email: ").append(toIndentedString(email)).append("\n");
+    sb.append("    password: ").append(toIndentedString(password)).append("\n");
+    sb.append("    phone: ").append(toIndentedString(phone)).append("\n");
+    sb.append("    userStatus: ").append(toIndentedString(userStatus)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+
+}
+

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/api/AnotherFakeApiTest.java

@@ -0,0 +1,50 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.openapitools.client.model.Client;
+import org.junit.Test;
+import org.junit.Ignore;
+import org.junit.Assert;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for AnotherFakeApi
+ */
+@Ignore
+public class AnotherFakeApiTest {
+
+    private final AnotherFakeApi api = new AnotherFakeApi();
+
+    /**
+     * To test special tags
+     *
+     * To test special tags and operation ID starting with number
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void call123testSpecialTagsTest() throws ApiException {
+        Client body = null;
+        Client response = api.call123testSpecialTags(body);
+
+        // TODO: test validations
+    }
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/api/FakeApiTest.java

@@ -0,0 +1,264 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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 java.math.BigDecimal;
+import org.openapitools.client.model.Client;
+import java.io.File;
+import org.openapitools.client.model.FileSchemaTestClass;
+import org.threeten.bp.LocalDate;
+import org.threeten.bp.OffsetDateTime;
+import org.openapitools.client.model.OuterComposite;
+import org.openapitools.client.model.User;
+import org.openapitools.client.model.XmlItem;
+import org.junit.Test;
+import org.junit.Ignore;
+import org.junit.Assert;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for FakeApi
+ */
+@Ignore
+public class FakeApiTest {
+
+    private final FakeApi api = new FakeApi();
+
+    /**
+     * creates an XmlItem
+     *
+     * this route creates an XmlItem
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void createXmlItemTest() throws ApiException {
+        XmlItem xmlItem = null;
+        api.createXmlItem(xmlItem);
+
+        // TODO: test validations
+    }
+    /**
+     * Test serialization of outer boolean types
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void fakeOuterBooleanSerializeTest() throws ApiException {
+        Boolean body = null;
+        Boolean response = api.fakeOuterBooleanSerialize(body);
+
+        // TODO: test validations
+    }
+    /**
+     * Test serialization of object with outer number type
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void fakeOuterCompositeSerializeTest() throws ApiException {
+        OuterComposite body = null;
+        OuterComposite response = api.fakeOuterCompositeSerialize(body);
+
+        // TODO: test validations
+    }
+    /**
+     * Test serialization of outer number types
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void fakeOuterNumberSerializeTest() throws ApiException {
+        BigDecimal body = null;
+        BigDecimal response = api.fakeOuterNumberSerialize(body);
+
+        // TODO: test validations
+    }
+    /**
+     * Test serialization of outer string types
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void fakeOuterStringSerializeTest() throws ApiException {
+        String body = null;
+        String response = api.fakeOuterStringSerialize(body);
+
+        // TODO: test validations
+    }
+    /**
+     * For this test, the body for this request much reference a schema named `File`.
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testBodyWithFileSchemaTest() throws ApiException {
+        FileSchemaTestClass body = null;
+        api.testBodyWithFileSchema(body);
+
+        // TODO: test validations
+    }
+    /**
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testBodyWithQueryParamsTest() throws ApiException {
+        String query = null;
+        User body = null;
+        api.testBodyWithQueryParams(query, body);
+
+        // TODO: test validations
+    }
+    /**
+     * To test \"client\" model
+     *
+     * To test \"client\" model
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testClientModelTest() throws ApiException {
+        Client body = null;
+        Client response = api.testClientModel(body);
+
+        // TODO: test validations
+    }
+    /**
+     * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
+     *
+     * Fake endpoint for testing various parameters  假端點  偽のエンドポイント  가짜 엔드 포인트
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testEndpointParametersTest() throws ApiException {
+        BigDecimal number = null;
+        Double _double = null;
+        String patternWithoutDelimiter = null;
+        byte[] _byte = null;
+        Integer integer = null;
+        Integer int32 = null;
+        Long int64 = null;
+        Float _float = null;
+        String string = null;
+        File binary = null;
+        LocalDate date = null;
+        OffsetDateTime dateTime = null;
+        String password = null;
+        String paramCallback = null;
+        api.testEndpointParameters(number, _double, patternWithoutDelimiter, _byte, integer, int32, int64, _float, string, binary, date, dateTime, password, paramCallback);
+
+        // TODO: test validations
+    }
+    /**
+     * To test enum parameters
+     *
+     * To test enum parameters
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testEnumParametersTest() throws ApiException {
+        List<String> enumHeaderStringArray = null;
+        String enumHeaderString = null;
+        List<String> enumQueryStringArray = null;
+        String enumQueryString = null;
+        Integer enumQueryInteger = null;
+        Double enumQueryDouble = null;
+        List<String> enumFormStringArray = null;
+        String enumFormString = null;
+        api.testEnumParameters(enumHeaderStringArray, enumHeaderString, enumQueryStringArray, enumQueryString, enumQueryInteger, enumQueryDouble, enumFormStringArray, enumFormString);
+
+        // TODO: test validations
+    }
+    /**
+     * Fake endpoint to test group parameters (optional)
+     *
+     * Fake endpoint to test group parameters (optional)
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testGroupParametersTest() throws ApiException {
+        Integer requiredStringGroup = null;
+        Boolean requiredBooleanGroup = null;
+        Long requiredInt64Group = null;
+        Integer stringGroup = null;
+        Boolean booleanGroup = null;
+        Long int64Group = null;
+        api.testGroupParameters(requiredStringGroup, requiredBooleanGroup, requiredInt64Group, stringGroup, booleanGroup, int64Group);
+
+        // TODO: test validations
+    }
+    /**
+     * test inline additionalProperties
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testInlineAdditionalPropertiesTest() throws ApiException {
+        Map<String, String> param = null;
+        api.testInlineAdditionalProperties(param);
+
+        // TODO: test validations
+    }
+    /**
+     * test json serialization of form data
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testJsonFormDataTest() throws ApiException {
+        String param = null;
+        String param2 = null;
+        api.testJsonFormData(param, param2);
+
+        // TODO: test validations
+    }
+    /**
+     * To test the collection format in query parameters
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testQueryParameterCollectionFormatTest() throws ApiException {
+        List<String> pipe = null;
+        List<String> ioutil = null;
+        List<String> http = null;
+        List<String> url = null;
+        List<String> context = null;
+        api.testQueryParameterCollectionFormat(pipe, ioutil, http, url, context);
+
+        // TODO: test validations
+    }
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/api/FakeClassnameTags123ApiTest.java

@@ -0,0 +1,50 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.openapitools.client.model.Client;
+import org.junit.Test;
+import org.junit.Ignore;
+import org.junit.Assert;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for FakeClassnameTags123Api
+ */
+@Ignore
+public class FakeClassnameTags123ApiTest {
+
+    private final FakeClassnameTags123Api api = new FakeClassnameTags123Api();
+
+    /**
+     * To test class name in snake case
+     *
+     * To test class name in snake case
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void testClassnameTest() throws ApiException {
+        Client body = null;
+        Client response = api.testClassname(body);
+
+        // TODO: test validations
+    }
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/api/PetApiTest.java

@@ -0,0 +1,168 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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 java.io.File;
+import org.openapitools.client.model.ModelApiResponse;
+import org.openapitools.client.model.Pet;
+import java.util.Set;
+import org.junit.Test;
+import org.junit.Ignore;
+import org.junit.Assert;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for PetApi
+ */
+@Ignore
+public class PetApiTest {
+
+    private final PetApi api = new PetApi();
+
+    /**
+     * Add a new pet to the store
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void addPetTest() throws ApiException {
+        Pet body = null;
+        api.addPet(body);
+
+        // TODO: test validations
+    }
+    /**
+     * Deletes a pet
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void deletePetTest() throws ApiException {
+        Long petId = null;
+        String apiKey = null;
+        api.deletePet(petId, apiKey);
+
+        // TODO: test validations
+    }
+    /**
+     * Finds Pets by status
+     *
+     * Multiple status values can be provided with comma separated strings
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void findPetsByStatusTest() throws ApiException {
+        List<String> status = null;
+        List<Pet> response = api.findPetsByStatus(status);
+
+        // TODO: test validations
+    }
+    /**
+     * Finds Pets by tags
+     *
+     * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void findPetsByTagsTest() throws ApiException {
+        Set<String> tags = null;
+        Set<Pet> response = api.findPetsByTags(tags);
+
+        // TODO: test validations
+    }
+    /**
+     * Find pet by ID
+     *
+     * Returns a single pet
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void getPetByIdTest() throws ApiException {
+        Long petId = null;
+        Pet response = api.getPetById(petId);
+
+        // TODO: test validations
+    }
+    /**
+     * Update an existing pet
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void updatePetTest() throws ApiException {
+        Pet body = null;
+        api.updatePet(body);
+
+        // TODO: test validations
+    }
+    /**
+     * Updates a pet in the store with form data
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void updatePetWithFormTest() throws ApiException {
+        Long petId = null;
+        String name = null;
+        String status = null;
+        api.updatePetWithForm(petId, name, status);
+
+        // TODO: test validations
+    }
+    /**
+     * uploads an image
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void uploadFileTest() throws ApiException {
+        Long petId = null;
+        String additionalMetadata = null;
+        File file = null;
+        ModelApiResponse response = api.uploadFile(petId, additionalMetadata, file);
+
+        // TODO: test validations
+    }
+    /**
+     * uploads an image (required)
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void uploadFileWithRequiredFileTest() throws ApiException {
+        Long petId = null;
+        File requiredFile = null;
+        String additionalMetadata = null;
+        ModelApiResponse response = api.uploadFileWithRequiredFile(petId, requiredFile, additionalMetadata);
+
+        // TODO: test validations
+    }
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/api/StoreApiTest.java

@@ -0,0 +1,92 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.openapitools.client.model.Order;
+import org.junit.Test;
+import org.junit.Ignore;
+import org.junit.Assert;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for StoreApi
+ */
+@Ignore
+public class StoreApiTest {
+
+    private final StoreApi api = new StoreApi();
+
+    /**
+     * Delete purchase order by ID
+     *
+     * For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void deleteOrderTest() throws ApiException {
+        String orderId = null;
+        api.deleteOrder(orderId);
+
+        // TODO: test validations
+    }
+    /**
+     * Returns pet inventories by status
+     *
+     * Returns a map of status codes to quantities
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void getInventoryTest() throws ApiException {
+        Map<String, Integer> response = api.getInventory();
+
+        // TODO: test validations
+    }
+    /**
+     * Find purchase order by ID
+     *
+     * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generated exceptions
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void getOrderByIdTest() throws ApiException {
+        Long orderId = null;
+        Order response = api.getOrderById(orderId);
+
+        // TODO: test validations
+    }
+    /**
+     * Place an order for a pet
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void placeOrderTest() throws ApiException {
+        Order body = null;
+        Order response = api.placeOrder(body);
+
+        // TODO: test validations
+    }
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/api/UserApiTest.java

@@ -0,0 +1,146 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.openapitools.client.model.User;
+import org.junit.Test;
+import org.junit.Ignore;
+import org.junit.Assert;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API tests for UserApi
+ */
+@Ignore
+public class UserApiTest {
+
+    private final UserApi api = new UserApi();
+
+    /**
+     * Create user
+     *
+     * This can only be done by the logged in user.
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void createUserTest() throws ApiException {
+        User body = null;
+        api.createUser(body);
+
+        // TODO: test validations
+    }
+    /**
+     * Creates list of users with given input array
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void createUsersWithArrayInputTest() throws ApiException {
+        List<User> body = null;
+        api.createUsersWithArrayInput(body);
+
+        // TODO: test validations
+    }
+    /**
+     * Creates list of users with given input array
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void createUsersWithListInputTest() throws ApiException {
+        List<User> body = null;
+        api.createUsersWithListInput(body);
+
+        // TODO: test validations
+    }
+    /**
+     * Delete user
+     *
+     * This can only be done by the logged in user.
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void deleteUserTest() throws ApiException {
+        String username = null;
+        api.deleteUser(username);
+
+        // TODO: test validations
+    }
+    /**
+     * Get user by user name
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void getUserByNameTest() throws ApiException {
+        String username = null;
+        User response = api.getUserByName(username);
+
+        // TODO: test validations
+    }
+    /**
+     * Logs user into the system
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void loginUserTest() throws ApiException {
+        String username = null;
+        String password = null;
+        String response = api.loginUser(username, password);
+
+        // TODO: test validations
+    }
+    /**
+     * Logs out current logged in user session
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void logoutUserTest() throws ApiException {
+        api.logoutUser();
+
+        // TODO: test validations
+    }
+    /**
+     * Updated user
+     *
+     * This can only be done by the logged in user.
+     *
+     * @throws ApiException
+     *          if the Api call fails
+     */
+    @Test
+    public void updateUserTest() throws ApiException {
+        String username = null;
+        User body = null;
+        api.updateUser(username, body);
+
+        // TODO: test validations
+    }
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/AdditionalPropertiesAnyTypeTest.java

@@ -0,0 +1,52 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for AdditionalPropertiesAnyType
+ */
+public class AdditionalPropertiesAnyTypeTest {
+    private final AdditionalPropertiesAnyType model = new AdditionalPropertiesAnyType();
+
+    /**
+     * Model tests for AdditionalPropertiesAnyType
+     */
+    @Test
+    public void testAdditionalPropertiesAnyType() {
+        // TODO: test AdditionalPropertiesAnyType
+    }
+
+    /**
+     * Test the property 'name'
+     */
+    @Test
+    public void nameTest() {
+        // TODO: test name
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/AdditionalPropertiesArrayTest.java

@@ -0,0 +1,53 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for AdditionalPropertiesArray
+ */
+public class AdditionalPropertiesArrayTest {
+    private final AdditionalPropertiesArray model = new AdditionalPropertiesArray();
+
+    /**
+     * Model tests for AdditionalPropertiesArray
+     */
+    @Test
+    public void testAdditionalPropertiesArray() {
+        // TODO: test AdditionalPropertiesArray
+    }
+
+    /**
+     * Test the property 'name'
+     */
+    @Test
+    public void nameTest() {
+        // TODO: test name
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/AdditionalPropertiesBooleanTest.java

@@ -0,0 +1,52 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for AdditionalPropertiesBoolean
+ */
+public class AdditionalPropertiesBooleanTest {
+    private final AdditionalPropertiesBoolean model = new AdditionalPropertiesBoolean();
+
+    /**
+     * Model tests for AdditionalPropertiesBoolean
+     */
+    @Test
+    public void testAdditionalPropertiesBoolean() {
+        // TODO: test AdditionalPropertiesBoolean
+    }
+
+    /**
+     * Test the property 'name'
+     */
+    @Test
+    public void nameTest() {
+        // TODO: test name
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/AdditionalPropertiesClassTest.java

@@ -0,0 +1,134 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for AdditionalPropertiesClass
+ */
+public class AdditionalPropertiesClassTest {
+    private final AdditionalPropertiesClass model = new AdditionalPropertiesClass();
+
+    /**
+     * Model tests for AdditionalPropertiesClass
+     */
+    @Test
+    public void testAdditionalPropertiesClass() {
+        // TODO: test AdditionalPropertiesClass
+    }
+
+    /**
+     * Test the property 'mapString'
+     */
+    @Test
+    public void mapStringTest() {
+        // TODO: test mapString
+    }
+
+    /**
+     * Test the property 'mapNumber'
+     */
+    @Test
+    public void mapNumberTest() {
+        // TODO: test mapNumber
+    }
+
+    /**
+     * Test the property 'mapInteger'
+     */
+    @Test
+    public void mapIntegerTest() {
+        // TODO: test mapInteger
+    }
+
+    /**
+     * Test the property 'mapBoolean'
+     */
+    @Test
+    public void mapBooleanTest() {
+        // TODO: test mapBoolean
+    }
+
+    /**
+     * Test the property 'mapArrayInteger'
+     */
+    @Test
+    public void mapArrayIntegerTest() {
+        // TODO: test mapArrayInteger
+    }
+
+    /**
+     * Test the property 'mapArrayAnytype'
+     */
+    @Test
+    public void mapArrayAnytypeTest() {
+        // TODO: test mapArrayAnytype
+    }
+
+    /**
+     * Test the property 'mapMapString'
+     */
+    @Test
+    public void mapMapStringTest() {
+        // TODO: test mapMapString
+    }
+
+    /**
+     * Test the property 'mapMapAnytype'
+     */
+    @Test
+    public void mapMapAnytypeTest() {
+        // TODO: test mapMapAnytype
+    }
+
+    /**
+     * Test the property 'anytype1'
+     */
+    @Test
+    public void anytype1Test() {
+        // TODO: test anytype1
+    }
+
+    /**
+     * Test the property 'anytype2'
+     */
+    @Test
+    public void anytype2Test() {
+        // TODO: test anytype2
+    }
+
+    /**
+     * Test the property 'anytype3'
+     */
+    @Test
+    public void anytype3Test() {
+        // TODO: test anytype3
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/AdditionalPropertiesIntegerTest.java

@@ -0,0 +1,52 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for AdditionalPropertiesInteger
+ */
+public class AdditionalPropertiesIntegerTest {
+    private final AdditionalPropertiesInteger model = new AdditionalPropertiesInteger();
+
+    /**
+     * Model tests for AdditionalPropertiesInteger
+     */
+    @Test
+    public void testAdditionalPropertiesInteger() {
+        // TODO: test AdditionalPropertiesInteger
+    }
+
+    /**
+     * Test the property 'name'
+     */
+    @Test
+    public void nameTest() {
+        // TODO: test name
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/AdditionalPropertiesNumberTest.java

@@ -0,0 +1,53 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for AdditionalPropertiesNumber
+ */
+public class AdditionalPropertiesNumberTest {
+    private final AdditionalPropertiesNumber model = new AdditionalPropertiesNumber();
+
+    /**
+     * Model tests for AdditionalPropertiesNumber
+     */
+    @Test
+    public void testAdditionalPropertiesNumber() {
+        // TODO: test AdditionalPropertiesNumber
+    }
+
+    /**
+     * Test the property 'name'
+     */
+    @Test
+    public void nameTest() {
+        // TODO: test name
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/AdditionalPropertiesObjectTest.java

@@ -0,0 +1,52 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for AdditionalPropertiesObject
+ */
+public class AdditionalPropertiesObjectTest {
+    private final AdditionalPropertiesObject model = new AdditionalPropertiesObject();
+
+    /**
+     * Model tests for AdditionalPropertiesObject
+     */
+    @Test
+    public void testAdditionalPropertiesObject() {
+        // TODO: test AdditionalPropertiesObject
+    }
+
+    /**
+     * Test the property 'name'
+     */
+    @Test
+    public void nameTest() {
+        // TODO: test name
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/AdditionalPropertiesStringTest.java

@@ -0,0 +1,52 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for AdditionalPropertiesString
+ */
+public class AdditionalPropertiesStringTest {
+    private final AdditionalPropertiesString model = new AdditionalPropertiesString();
+
+    /**
+     * Model tests for AdditionalPropertiesString
+     */
+    @Test
+    public void testAdditionalPropertiesString() {
+        // TODO: test AdditionalPropertiesString
+    }
+
+    /**
+     * Test the property 'name'
+     */
+    @Test
+    public void nameTest() {
+        // TODO: test name
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/AnimalTest.java

@@ -0,0 +1,63 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.BigCat;
+import org.openapitools.client.model.Cat;
+import org.openapitools.client.model.Dog;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for Animal
+ */
+public class AnimalTest {
+    private final Animal model = new Animal();
+
+    /**
+     * Model tests for Animal
+     */
+    @Test
+    public void testAnimal() {
+        // TODO: test Animal
+    }
+
+    /**
+     * Test the property 'className'
+     */
+    @Test
+    public void classNameTest() {
+        // TODO: test className
+    }
+
+    /**
+     * Test the property 'color'
+     */
+    @Test
+    public void colorTest() {
+        // TODO: test color
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/ArrayOfArrayOfNumberOnlyTest.java

@@ -0,0 +1,53 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for ArrayOfArrayOfNumberOnly
+ */
+public class ArrayOfArrayOfNumberOnlyTest {
+    private final ArrayOfArrayOfNumberOnly model = new ArrayOfArrayOfNumberOnly();
+
+    /**
+     * Model tests for ArrayOfArrayOfNumberOnly
+     */
+    @Test
+    public void testArrayOfArrayOfNumberOnly() {
+        // TODO: test ArrayOfArrayOfNumberOnly
+    }
+
+    /**
+     * Test the property 'arrayArrayNumber'
+     */
+    @Test
+    public void arrayArrayNumberTest() {
+        // TODO: test arrayArrayNumber
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/ArrayOfNumberOnlyTest.java

@@ -0,0 +1,53 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for ArrayOfNumberOnly
+ */
+public class ArrayOfNumberOnlyTest {
+    private final ArrayOfNumberOnly model = new ArrayOfNumberOnly();
+
+    /**
+     * Model tests for ArrayOfNumberOnly
+     */
+    @Test
+    public void testArrayOfNumberOnly() {
+        // TODO: test ArrayOfNumberOnly
+    }
+
+    /**
+     * Test the property 'arrayNumber'
+     */
+    @Test
+    public void arrayNumberTest() {
+        // TODO: test arrayNumber
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/ArrayTestTest.java

@@ -0,0 +1,69 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.List;
+import org.openapitools.client.model.ReadOnlyFirst;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for ArrayTest
+ */
+public class ArrayTestTest {
+    private final ArrayTest model = new ArrayTest();
+
+    /**
+     * Model tests for ArrayTest
+     */
+    @Test
+    public void testArrayTest() {
+        // TODO: test ArrayTest
+    }
+
+    /**
+     * Test the property 'arrayOfString'
+     */
+    @Test
+    public void arrayOfStringTest() {
+        // TODO: test arrayOfString
+    }
+
+    /**
+     * Test the property 'arrayArrayOfInteger'
+     */
+    @Test
+    public void arrayArrayOfIntegerTest() {
+        // TODO: test arrayArrayOfInteger
+    }
+
+    /**
+     * Test the property 'arrayArrayOfModel'
+     */
+    @Test
+    public void arrayArrayOfModelTest() {
+        // TODO: test arrayArrayOfModel
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/BigCatAllOfTest.java

@@ -0,0 +1,50 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for BigCatAllOf
+ */
+public class BigCatAllOfTest {
+    private final BigCatAllOf model = new BigCatAllOf();
+
+    /**
+     * Model tests for BigCatAllOf
+     */
+    @Test
+    public void testBigCatAllOf() {
+        // TODO: test BigCatAllOf
+    }
+
+    /**
+     * Test the property 'kind'
+     */
+    @Test
+    public void kindTest() {
+        // TODO: test kind
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/BigCatTest.java

@@ -0,0 +1,78 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.BigCatAllOf;
+import org.openapitools.client.model.Cat;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for BigCat
+ */
+public class BigCatTest {
+    private final BigCat model = new BigCat();
+
+    /**
+     * Model tests for BigCat
+     */
+    @Test
+    public void testBigCat() {
+        // TODO: test BigCat
+    }
+
+    /**
+     * Test the property 'className'
+     */
+    @Test
+    public void classNameTest() {
+        // TODO: test className
+    }
+
+    /**
+     * Test the property 'color'
+     */
+    @Test
+    public void colorTest() {
+        // TODO: test color
+    }
+
+    /**
+     * Test the property 'declawed'
+     */
+    @Test
+    public void declawedTest() {
+        // TODO: test declawed
+    }
+
+    /**
+     * Test the property 'kind'
+     */
+    @Test
+    public void kindTest() {
+        // TODO: test kind
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/CapitalizationTest.java

@@ -0,0 +1,90 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for Capitalization
+ */
+public class CapitalizationTest {
+    private final Capitalization model = new Capitalization();
+
+    /**
+     * Model tests for Capitalization
+     */
+    @Test
+    public void testCapitalization() {
+        // TODO: test Capitalization
+    }
+
+    /**
+     * Test the property 'smallCamel'
+     */
+    @Test
+    public void smallCamelTest() {
+        // TODO: test smallCamel
+    }
+
+    /**
+     * Test the property 'capitalCamel'
+     */
+    @Test
+    public void capitalCamelTest() {
+        // TODO: test capitalCamel
+    }
+
+    /**
+     * Test the property 'smallSnake'
+     */
+    @Test
+    public void smallSnakeTest() {
+        // TODO: test smallSnake
+    }
+
+    /**
+     * Test the property 'capitalSnake'
+     */
+    @Test
+    public void capitalSnakeTest() {
+        // TODO: test capitalSnake
+    }
+
+    /**
+     * Test the property 'scAETHFlowPoints'
+     */
+    @Test
+    public void scAETHFlowPointsTest() {
+        // TODO: test scAETHFlowPoints
+    }
+
+    /**
+     * Test the property 'ATT_NAME'
+     */
+    @Test
+    public void ATT_NAMETest() {
+        // TODO: test ATT_NAME
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/CatAllOfTest.java

@@ -0,0 +1,50 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for CatAllOf
+ */
+public class CatAllOfTest {
+    private final CatAllOf model = new CatAllOf();
+
+    /**
+     * Model tests for CatAllOf
+     */
+    @Test
+    public void testCatAllOf() {
+        // TODO: test CatAllOf
+    }
+
+    /**
+     * Test the property 'declawed'
+     */
+    @Test
+    public void declawedTest() {
+        // TODO: test declawed
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/CatTest.java

@@ -0,0 +1,71 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Animal;
+import org.openapitools.client.model.BigCat;
+import org.openapitools.client.model.CatAllOf;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for Cat
+ */
+public class CatTest {
+    private final Cat model = new Cat();
+
+    /**
+     * Model tests for Cat
+     */
+    @Test
+    public void testCat() {
+        // TODO: test Cat
+    }
+
+    /**
+     * Test the property 'className'
+     */
+    @Test
+    public void classNameTest() {
+        // TODO: test className
+    }
+
+    /**
+     * Test the property 'color'
+     */
+    @Test
+    public void colorTest() {
+        // TODO: test color
+    }
+
+    /**
+     * Test the property 'declawed'
+     */
+    @Test
+    public void declawedTest() {
+        // TODO: test declawed
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/CategoryTest.java

@@ -0,0 +1,58 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for Category
+ */
+public class CategoryTest {
+    private final Category model = new Category();
+
+    /**
+     * Model tests for Category
+     */
+    @Test
+    public void testCategory() {
+        // TODO: test Category
+    }
+
+    /**
+     * Test the property 'id'
+     */
+    @Test
+    public void idTest() {
+        // TODO: test id
+    }
+
+    /**
+     * Test the property 'name'
+     */
+    @Test
+    public void nameTest() {
+        // TODO: test name
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/ClassModelTest.java

@@ -0,0 +1,50 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for ClassModel
+ */
+public class ClassModelTest {
+    private final ClassModel model = new ClassModel();
+
+    /**
+     * Model tests for ClassModel
+     */
+    @Test
+    public void testClassModel() {
+        // TODO: test ClassModel
+    }
+
+    /**
+     * Test the property 'propertyClass'
+     */
+    @Test
+    public void propertyClassTest() {
+        // TODO: test propertyClass
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/ClientTest.java

@@ -0,0 +1,50 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for Client
+ */
+public class ClientTest {
+    private final Client model = new Client();
+
+    /**
+     * Model tests for Client
+     */
+    @Test
+    public void testClient() {
+        // TODO: test Client
+    }
+
+    /**
+     * Test the property 'client'
+     */
+    @Test
+    public void clientTest() {
+        // TODO: test client
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/DogAllOfTest.java

@@ -0,0 +1,50 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for DogAllOf
+ */
+public class DogAllOfTest {
+    private final DogAllOf model = new DogAllOf();
+
+    /**
+     * Model tests for DogAllOf
+     */
+    @Test
+    public void testDogAllOf() {
+        // TODO: test DogAllOf
+    }
+
+    /**
+     * Test the property 'breed'
+     */
+    @Test
+    public void breedTest() {
+        // TODO: test breed
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/DogTest.java

@@ -0,0 +1,70 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.Animal;
+import org.openapitools.client.model.DogAllOf;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for Dog
+ */
+public class DogTest {
+    private final Dog model = new Dog();
+
+    /**
+     * Model tests for Dog
+     */
+    @Test
+    public void testDog() {
+        // TODO: test Dog
+    }
+
+    /**
+     * Test the property 'className'
+     */
+    @Test
+    public void classNameTest() {
+        // TODO: test className
+    }
+
+    /**
+     * Test the property 'color'
+     */
+    @Test
+    public void colorTest() {
+        // TODO: test color
+    }
+
+    /**
+     * Test the property 'breed'
+     */
+    @Test
+    public void breedTest() {
+        // TODO: test breed
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/EnumArraysTest.java

@@ -0,0 +1,60 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.ArrayList;
+import java.util.List;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for EnumArrays
+ */
+public class EnumArraysTest {
+    private final EnumArrays model = new EnumArrays();
+
+    /**
+     * Model tests for EnumArrays
+     */
+    @Test
+    public void testEnumArrays() {
+        // TODO: test EnumArrays
+    }
+
+    /**
+     * Test the property 'justSymbol'
+     */
+    @Test
+    public void justSymbolTest() {
+        // TODO: test justSymbol
+    }
+
+    /**
+     * Test the property 'arrayEnum'
+     */
+    @Test
+    public void arrayEnumTest() {
+        // TODO: test arrayEnum
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/EnumClassTest.java

@@ -0,0 +1,33 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for EnumClass
+ */
+public class EnumClassTest {
+    /**
+     * Model tests for EnumClass
+     */
+    @Test
+    public void testEnumClass() {
+        // TODO: test EnumClass
+    }
+
+}

samples/client/petstore/java/apache-httpclient/src/test/java/org/openapitools/client/model/EnumTestTest.java

@@ -0,0 +1,83 @@
+/*
+ * OpenAPI Petstore
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * 
+ *
+ * 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.model;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.fasterxml.jackson.annotation.JsonValue;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.openapitools.client.model.OuterEnum;
+import org.junit.Assert;
+import org.junit.Ignore;
+import org.junit.Test;
+
+
+/**
+ * Model tests for EnumTest
+ */
+public class EnumTestTest {
+    private final EnumTest model = new EnumTest();
+
+    /**
+     * Model tests for EnumTest
+     */
+    @Test
+    public void testEnumTest() {
+        // TODO: test EnumTest
+    }
+
+    /**
+     * Test the property 'enumString'
+     */
+    @Test
+    public void enumStringTest() {
+        // TODO: test enumString
+    }
+
+    /**
+     * Test the property 'enumStringRequired'
+     */
+    @Test
+    public void enumStringRequiredTest() {
+        // TODO: test enumStringRequired
+    }
+
+    /**
+     * Test the property 'enumInteger'
+     */
+    @Test
+    public void enumIntegerTest() {
+        // TODO: test enumInteger
+    }
+
+    /**
+     * Test the property 'enumNumber'
+     */
+    @Test
+    public void enumNumberTest() {
+        // TODO: test enumNumber
+    }
+
+    /**
+     * Test the property 'outerEnum'
+     */
+    @Test
+    public void outerEnumTest() {
+        // TODO: test outerEnum
+    }
+
+}