add back java okhttp petstore client

modules/swagger-codegen/src/main/resources/Java/pojo.mustache

@@ -3,7 +3,7 @@
  */{{#description}}
 @ApiModel(description = "{{{description}}}"){{/description}}
 {{>generatedAnnotation}}
-public class {{classname}} {{#parent}}extends {{{parent}}}{{/parent}} {{#parcelableModel}}implements Parcelable{{#serializableModel}}, Serializable{{/serializableModel}}{{/parcelableModel}}{{^parcelableModel}}{{#serializableModel}}implements Serializable{{/serializableModel}}{{/parcelableModel}} {
+public class {{classname}} {{#parent}}extends {{{parent}}} {{/parent}}{{#parcelableModel}}implements Parcelable {{#serializableModel}}, Serializable {{/serializableModel}}{{/parcelableModel}}{{^parcelableModel}}{{#serializableModel}}implements Serializable {{/serializableModel}}{{/parcelableModel}}{
   {{#vars}}
     {{#isEnum}}
     {{^isContainer}}

samples/client/petstore/java/okhttp-gson/.gitignore

@@ -0,0 +1,21 @@
+*.class
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+
+# exclude jar for gradle wrapper
+!gradle/wrapper/*.jar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+# build files
+**/target
+target
+.gradle
+build

samples/client/petstore/java/okhttp-gson/.swagger-codegen-ignore

@@ -0,0 +1,23 @@
+# Swagger Codegen Ignore
+# Generated by swagger-codegen https://github.com/swagger-api/swagger-codegen
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell Swagger Codgen to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md

samples/client/petstore/java/okhttp-gson/.travis.yml

@@ -0,0 +1,29 @@
+#
+# Generated by: https://github.com/swagger-api/swagger-codegen.git
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+language: java
+jdk:
+  - oraclejdk8
+  - oraclejdk7
+before_install:
+  # ensure gradlew has proper permission
+  - chmod a+x ./gradlew
+script:
+  # test using maven
+  - mvn test
+  # uncomment below to test using gradle
+  # - gradle test
+  # uncomment below to test using sbt 
+  # - sbt test

samples/client/petstore/java/okhttp-gson/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+   limitations under the License.

samples/client/petstore/java/okhttp-gson/build.gradle

@@ -0,0 +1,103 @@
+apply plugin: 'idea'
+apply plugin: 'eclipse'
+
+group = 'io.swagger'
+version = '1.0.0'
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:1.5.+'
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.3'
+    }
+}
+
+repositories {
+    jcenter()
+}
+
+
+if(hasProperty('target') && target == 'android') {
+
+    apply plugin: 'com.android.library'
+    apply plugin: 'com.github.dcendents.android-maven'
+
+    android {
+        compileSdkVersion 23
+        buildToolsVersion '23.0.2'
+        defaultConfig {
+            minSdkVersion 14
+            targetSdkVersion 23
+        }
+        compileOptions {
+            sourceCompatibility JavaVersion.VERSION_1_7
+            targetCompatibility JavaVersion.VERSION_1_7
+        }
+
+        // Rename the aar correctly
+        libraryVariants.all { variant ->
+            variant.outputs.each { output ->
+                def outputFile = output.outputFile
+                if (outputFile != null && outputFile.name.endsWith('.aar')) {
+                    def fileName = "${project.name}-${variant.baseName}-${version}.aar"
+                    output.outputFile = new File(outputFile.parent, fileName)
+                }
+            }
+        }
+
+        dependencies {
+            provided 'javax.annotation:jsr250-api:1.0'
+        }
+    }
+
+    afterEvaluate {
+        android.libraryVariants.all { variant ->
+            def task = project.tasks.create "jar${variant.name.capitalize()}", Jar
+            task.description = "Create jar artifact for ${variant.name}"
+            task.dependsOn variant.javaCompile
+            task.from variant.javaCompile.destinationDir
+            task.destinationDir = project.file("${project.buildDir}/outputs/jar")
+            task.archiveName = "${project.name}-${variant.baseName}-${version}.jar"
+            artifacts.add('archives', task);
+        }
+    }
+
+    task sourcesJar(type: Jar) {
+        from android.sourceSets.main.java.srcDirs
+        classifier = 'sources'
+    }
+
+    artifacts {
+        archives sourcesJar
+    }
+
+} else {
+
+    apply plugin: 'java'
+    apply plugin: 'maven'
+
+    sourceCompatibility = JavaVersion.VERSION_1_7
+    targetCompatibility = JavaVersion.VERSION_1_7
+
+    install {
+        repositories.mavenInstaller {
+            pom.artifactId = 'swagger-petstore-okhttp-gson'
+        }
+    }
+
+    task execute(type:JavaExec) {
+       main = System.getProperty('mainClass')
+       classpath = sourceSets.main.runtimeClasspath
+    }
+}
+
+dependencies {
+    compile 'io.swagger:swagger-annotations:1.5.8'
+    compile 'com.squareup.okhttp:okhttp:2.7.5'
+    compile 'com.squareup.okhttp:logging-interceptor:2.7.5'
+    compile 'com.google.code.gson:gson:2.6.2'
+    compile 'joda-time:joda-time:2.9.3'
+    testCompile 'junit:junit:4.12'
+}

samples/client/petstore/java/okhttp-gson/build.sbt

@@ -0,0 +1,20 @@
+lazy val root = (project in file(".")).
+  settings(
+    organization := "io.swagger",
+    name := "swagger-petstore-okhttp-gson",
+    version := "1.0.0",
+    scalaVersion := "2.11.4",
+    scalacOptions ++= Seq("-feature"),
+    javacOptions in compile ++= Seq("-Xlint:deprecation"),
+    publishArtifact in (Compile, packageDoc) := false,
+    resolvers += Resolver.mavenLocal,
+    libraryDependencies ++= Seq(
+      "io.swagger" % "swagger-annotations" % "1.5.8",
+      "com.squareup.okhttp" % "okhttp" % "2.7.5",
+      "com.squareup.okhttp" % "logging-interceptor" % "2.7.5",
+      "com.google.code.gson" % "gson" % "2.6.2",
+      "joda-time" % "joda-time" % "2.9.3" % "compile",
+      "junit" % "junit" % "4.12" % "test",
+      "com.novocode" % "junit-interface" % "0.10" % "test"
+    )
+  )

samples/client/petstore/java/okhttp-gson/git_push.sh

@@ -0,0 +1,52 @@
+#!/bin/sh
+# ref: https://help.github.com/articles/adding-an-existing-project-to-github-using-the-command-line/
+#
+# Usage example: /bin/sh ./git_push.sh wing328 swagger-petstore-perl "minor update"
+
+git_user_id=$1
+git_repo_id=$2
+release_note=$3
+
+if [ "$git_user_id" = "" ]; then
+    git_user_id="GIT_USER_ID"
+    echo "[INFO] No command line input provided. Set \$git_user_id to $git_user_id"
+fi
+
+if [ "$git_repo_id" = "" ]; then
+    git_repo_id="GIT_REPO_ID"
+    echo "[INFO] No command line input provided. Set \$git_repo_id to $git_repo_id"
+fi
+
+if [ "$release_note" = "" ]; then
+    release_note="Minor update"
+    echo "[INFO] No command line input provided. Set \$release_note to $release_note"
+fi
+
+# Initialize the local directory as a Git repository
+git init
+
+# Adds the files in the local repository and stages them for commit.
+git add .
+
+# Commits the tracked changes and prepares them to be pushed to a remote repository. 
+git commit -m "$release_note"
+
+# Sets the new remote
+git_remote=`git remote`
+if [ "$git_remote" = "" ]; then # git remote not defined
+
+    if [ "$GIT_TOKEN" = "" ]; then
+        echo "[INFO] \$GIT_TOKEN (environment variable) is not set. Using the git crediential in your environment."
+        git remote add origin https://github.com/${git_user_id}/${git_repo_id}.git
+    else
+        git remote add origin https://${git_user_id}:${GIT_TOKEN}@github.com/${git_user_id}/${git_repo_id}.git
+    fi
+
+fi
+
+git pull origin master
+
+# Pushes (Forces) the changes in the local repository up to the remote repository
+echo "Git pushing to https://github.com/${git_user_id}/${git_repo_id}.git"
+git push origin master 2>&1 | grep -v 'To https'
+

samples/client/petstore/java/okhttp-gson/gradle.properties

@@ -0,0 +1,2 @@
+# Uncomment to build for Android
+#target = android

samples/client/petstore/java/okhttp-gson/gradlew

@@ -0,0 +1,160 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

samples/client/petstore/java/okhttp-gson/gradlew.bat

@@ -0,0 +1,90 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

samples/client/petstore/java/okhttp-gson/pom.xml

@@ -0,0 +1,148 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>io.swagger</groupId>
+  <artifactId>swagger-petstore-okhttp-gson</artifactId>
+  <packaging>jar</packaging>
+  <name>swagger-petstore-okhttp-gson</name>
+  <version>1.0.0</version>
+  <scm>
+    <connection>scm:git:git@github.com:swagger-api/swagger-mustache.git</connection>
+    <developerConnection>scm:git:git@github.com:swagger-api/swagger-codegen.git</developerConnection>
+    <url>https://github.com/swagger-api/swagger-codegen</url>
+  </scm>
+  <prerequisites>
+    <maven>2.2.0</maven>
+  </prerequisites>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <version>2.12</version>
+        <configuration>
+          <systemProperties>
+            <property>
+              <name>loggerPath</name>
+              <value>conf/log4j.properties</value>
+            </property>
+          </systemProperties>
+          <argLine>-Xms512m -Xmx1500m</argLine>
+          <parallel>methods</parallel>
+          <forkMode>pertest</forkMode>
+        </configuration>
+      </plugin>
+      <plugin>
+        <artifactId>maven-dependency-plugin</artifactId>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>copy-dependencies</goal>
+            </goals>
+            <configuration>
+              <outputDirectory>${project.build.directory}/lib</outputDirectory>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+
+      <!-- attach test jar -->
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+        <version>2.2</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>jar</goal>
+              <goal>test-jar</goal>
+            </goals>
+          </execution>
+        </executions>
+        <configuration>
+        </configuration>
+      </plugin>
+
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>build-helper-maven-plugin</artifactId>
+        <version>1.10</version>
+        <executions>
+          <execution>
+            <id>add_sources</id>
+            <phase>generate-sources</phase>
+            <goals>
+              <goal>add-source</goal>
+            </goals>
+            <configuration>
+              <sources>
+                <source>src/main/java</source>
+              </sources>
+            </configuration>
+          </execution>
+          <execution>
+            <id>add_test_sources</id>
+            <phase>generate-test-sources</phase>
+            <goals>
+              <goal>add-test-source</goal>
+            </goals>
+            <configuration>
+              <sources>
+                <source>src/test/java</source>
+              </sources>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+  <dependencies>
+    <dependency>
+      <groupId>io.swagger</groupId>
+      <artifactId>swagger-annotations</artifactId>
+      <version>${swagger-core-version}</version>
+    </dependency>
+    <dependency>
+      <groupId>com.squareup.okhttp</groupId>
+      <artifactId>okhttp</artifactId>
+      <version>${okhttp-version}</version>
+    </dependency>
+    <dependency>
+      <groupId>com.squareup.okhttp</groupId>
+      <artifactId>logging-interceptor</artifactId>
+      <version>${okhttp-version}</version>
+    </dependency>
+    <dependency>
+      <groupId>com.google.code.gson</groupId>
+      <artifactId>gson</artifactId>
+      <version>${gson-version}</version>
+    </dependency>
+    <dependency>
+      <groupId>joda-time</groupId>
+      <artifactId>joda-time</artifactId>
+      <version>${jodatime-version}</version>
+    </dependency>
+
+    <!-- test dependencies -->
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>${junit-version}</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+  <properties>
+    <java.version>1.7</java.version>
+    <maven.compiler.source>${java.version}</maven.compiler.source>
+    <maven.compiler.target>${java.version}</maven.compiler.target>
+    <swagger-core-version>1.5.9</swagger-core-version>
+    <okhttp-version>2.7.5</okhttp-version>
+    <gson-version>2.6.2</gson-version>
+    <jodatime-version>2.9.3</jodatime-version>
+    <maven-plugin-version>1.0.0</maven-plugin-version>
+    <junit-version>4.12</junit-version>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+</project>

samples/client/petstore/java/okhttp-gson/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = "swagger-petstore-okhttp-gson"

samples/client/petstore/java/okhttp-gson/src/main/AndroidManifest.xml

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

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/ApiCallback.java

@@ -0,0 +1,74 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client;
+
+import java.io.IOException;
+
+import java.util.Map;
+import java.util.List;
+
+/**
+ * Callback for asynchronous API call.
+ *
+ * @param <T> The return type
+ */
+public interface ApiCallback<T> {
+    /**
+     * This is called when the API call fails.
+     *
+     * @param e The exception causing the failure
+     * @param statusCode Status code of the response if available, otherwise it would be 0
+     * @param responseHeaders Headers of the response if available, otherwise it would be null
+     */
+    void onFailure(ApiException e, int statusCode, Map<String, List<String>> responseHeaders);
+
+    /**
+     * This is called when the API call succeeded.
+     *
+     * @param result The result deserialized from response
+     * @param statusCode Status code of the response
+     * @param responseHeaders Headers of the response
+     */
+    void onSuccess(T result, int statusCode, Map<String, List<String>> responseHeaders);
+
+    /**
+     * This is called when the API upload processing.
+     *
+     * @param bytesWritten bytes Written
+     * @param contentLength content length of request body
+     * @param done write end
+     */
+    void onUploadProgress(long bytesWritten, long contentLength, boolean done);
+
+    /**
+     * This is called when the API downlond processing.
+     *
+     * @param bytesRead bytes Read
+     * @param contentLength content lenngth of the response
+     * @param done Read end
+     */
+    void onDownloadProgress(long bytesRead, long contentLength, boolean done);
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/ApiException.java

@@ -0,0 +1,103 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client;
+
+import java.util.Map;
+import java.util.List;
+
+
+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/okhttp-gson/src/main/java/io/swagger/client/ApiResponse.java

@@ -0,0 +1,71 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * API response returned by API call.
+ *
+ * @param T The type of data that is deserialized from response body
+ */
+public class ApiResponse<T> {
+    final private int statusCode;
+    final private Map<String, List<String>> headers;
+    final private T data;
+
+    /**
+     * @param statusCode The status code of HTTP response
+     * @param headers The headers of HTTP response
+     */
+    public ApiResponse(int statusCode, Map<String, List<String>> headers) {
+        this(statusCode, headers, null);
+    }
+
+    /**
+     * @param statusCode The status code of HTTP response
+     * @param headers The headers of HTTP response
+     * @param data The object deserialized from response bod
+     */
+    public ApiResponse(int statusCode, Map<String, List<String>> headers, T data) {
+        this.statusCode = statusCode;
+        this.headers = headers;
+        this.data = data;
+    }
+
+    public int getStatusCode() {
+        return statusCode;
+    }
+
+    public Map<String, List<String>> getHeaders() {
+        return headers;
+    }
+
+    public T getData() {
+        return data;
+    }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/Configuration.java

@@ -0,0 +1,51 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client;
+
+
+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/okhttp-gson/src/main/java/io/swagger/client/JSON.java

@@ -0,0 +1,237 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonDeserializationContext;
+import com.google.gson.JsonDeserializer;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonNull;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonPrimitive;
+import com.google.gson.JsonSerializationContext;
+import com.google.gson.JsonSerializer;
+import com.google.gson.TypeAdapter;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.lang.reflect.Type;
+import java.util.Date;
+
+import org.joda.time.DateTime;
+import org.joda.time.LocalDate;
+import org.joda.time.format.DateTimeFormatter;
+import org.joda.time.format.ISODateTimeFormat;
+
+public class JSON {
+    private ApiClient apiClient;
+    private Gson gson;
+
+    /**
+     * JSON constructor.
+     *
+     * @param apiClient An instance of ApiClient
+     */
+    public JSON(ApiClient apiClient) {
+        this.apiClient = apiClient;
+        gson = new GsonBuilder()
+            .registerTypeAdapter(Date.class, new DateAdapter(apiClient))
+            .registerTypeAdapter(DateTime.class, new DateTimeTypeAdapter())
+            .registerTypeAdapter(LocalDate.class, new LocalDateTypeAdapter())
+            .create();
+    }
+
+    /**
+     * Get Gson.
+     *
+     * @return Gson
+     */
+    public Gson getGson() {
+        return gson;
+    }
+
+    /**
+     * Set Gson.
+     *
+     * @param gson Gson
+     */
+    public void setGson(Gson gson) {
+        this.gson = gson;
+    }
+
+    /**
+     * Serialize the given Java object into JSON string.
+     *
+     * @param obj Object
+     * @return String representation of the JSON
+     */
+    public String serialize(Object obj) {
+        return gson.toJson(obj);
+    }
+
+    /**
+     * Deserialize the given JSON string to Java object.
+     *
+     * @param <T> Type
+     * @param body The JSON string
+     * @param returnType The type to deserialize inot
+     * @return The deserialized Java object
+     */
+    @SuppressWarnings("unchecked")
+    public <T> T deserialize(String body, Type returnType) {
+        try {
+            if (apiClient.isLenientOnJson()) {
+                JsonReader jsonReader = new JsonReader(new StringReader(body));
+                // see https://google-gson.googlecode.com/svn/trunk/gson/docs/javadocs/com/google/gson/stream/JsonReader.html#setLenient(boolean)
+                jsonReader.setLenient(true);
+                return gson.fromJson(jsonReader, returnType);
+            } else {
+                return gson.fromJson(body, returnType);
+            }
+        } catch (JsonParseException e) {
+            // Fallback processing when failed to parse JSON form response body:
+            //   return the response body string directly for the String return type;
+            //   parse response body into date or datetime for the Date return type.
+            if (returnType.equals(String.class))
+                return (T) body;
+            else if (returnType.equals(Date.class))
+                return (T) apiClient.parseDateOrDatetime(body);
+            else throw(e);
+        }
+    }
+}
+
+class DateAdapter implements JsonSerializer<Date>, JsonDeserializer<Date> {
+    private final ApiClient apiClient;
+
+    /**
+     * Constructor for DateAdapter
+     *
+     * @param apiClient Api client
+     */
+    public DateAdapter(ApiClient apiClient) {
+        super();
+        this.apiClient = apiClient;
+    }
+
+    /**
+     * Serialize
+     *
+     * @param src Date
+     * @param typeOfSrc Type
+     * @param context Json Serialization Context
+     * @return Json Element
+     */
+    @Override
+    public JsonElement serialize(Date src, Type typeOfSrc, JsonSerializationContext context) {
+        if (src == null) {
+            return JsonNull.INSTANCE;
+        } else {
+            return new JsonPrimitive(apiClient.formatDatetime(src));
+        }
+    }
+
+    /**
+     * Deserialize
+     *
+     * @param json Json element
+     * @param date Type
+     * @param typeOfSrc Type
+     * @param context Json Serialization Context
+     * @return Date
+     * @throw JsonParseException if fail to parse
+     */
+    @Override
+    public Date deserialize(JsonElement json, Type date, JsonDeserializationContext context) throws JsonParseException {
+        String str = json.getAsJsonPrimitive().getAsString();
+        try {
+            return apiClient.parseDateOrDatetime(str);
+        } catch (RuntimeException e) {
+            throw new JsonParseException(e);
+        }
+    }
+}
+
+/**
+ * Gson TypeAdapter for Joda DateTime type
+ */
+class DateTimeTypeAdapter extends TypeAdapter<DateTime> {
+
+    private final DateTimeFormatter formatter = ISODateTimeFormat.dateTime();
+
+    @Override
+    public void write(JsonWriter out, DateTime date) throws IOException {
+        if (date == null) {
+            out.nullValue();
+        } else {
+            out.value(formatter.print(date));
+        }
+    }
+
+    @Override
+    public DateTime read(JsonReader in) throws IOException {
+        switch (in.peek()) {
+            case NULL:
+                in.nextNull();
+                return null;
+            default:
+                String date = in.nextString();
+                return formatter.parseDateTime(date);
+        }
+    }
+}
+
+/**
+ * Gson TypeAdapter for Joda LocalDate type
+ */
+class LocalDateTypeAdapter extends TypeAdapter<LocalDate> {
+
+    private final DateTimeFormatter formatter = ISODateTimeFormat.date();
+
+    @Override
+    public void write(JsonWriter out, LocalDate date) throws IOException {
+        if (date == null) {
+            out.nullValue();
+        } else {
+            out.value(formatter.print(date));
+        }
+    }
+
+    @Override
+    public LocalDate read(JsonReader in) throws IOException {
+        switch (in.peek()) {
+            case NULL:
+                in.nextNull();
+                return null;
+            default:
+                String date = in.nextString();
+                return formatter.parseLocalDate(date);
+        }
+    }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/Pair.java

@@ -0,0 +1,64 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client;
+
+
+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/okhttp-gson/src/main/java/io/swagger/client/ProgressRequestBody.java

@@ -0,0 +1,95 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client;
+
+import com.squareup.okhttp.MediaType;
+import com.squareup.okhttp.RequestBody;
+
+import java.io.IOException;
+
+import okio.Buffer;
+import okio.BufferedSink;
+import okio.ForwardingSink;
+import okio.Okio;
+import okio.Sink;
+
+public class ProgressRequestBody extends RequestBody {
+
+    public interface ProgressRequestListener {
+        void onRequestProgress(long bytesWritten, long contentLength, boolean done);
+    }
+
+    private final RequestBody requestBody;
+
+    private final ProgressRequestListener progressListener;
+
+    private BufferedSink bufferedSink;
+
+    public ProgressRequestBody(RequestBody requestBody, ProgressRequestListener progressListener) {
+        this.requestBody = requestBody;
+        this.progressListener = progressListener;
+    }
+
+    @Override
+    public MediaType contentType() {
+        return requestBody.contentType();
+    }
+
+    @Override
+    public long contentLength() throws IOException {
+        return requestBody.contentLength();
+    }
+
+    @Override
+    public void writeTo(BufferedSink sink) throws IOException {
+        if (bufferedSink == null) {
+            bufferedSink = Okio.buffer(sink(sink));
+        }
+
+        requestBody.writeTo(bufferedSink);
+        bufferedSink.flush();
+
+    }
+
+    private Sink sink(Sink sink) {
+        return new ForwardingSink(sink) {
+
+            long bytesWritten = 0L;
+            long contentLength = 0L;
+
+            @Override
+            public void write(Buffer source, long byteCount) throws IOException {
+                super.write(source, byteCount);
+                if (contentLength == 0) {
+                    contentLength = contentLength();
+                }
+
+                bytesWritten += byteCount;
+                progressListener.onRequestProgress(bytesWritten, contentLength, bytesWritten == contentLength);
+            }
+        };
+    }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/ProgressResponseBody.java

@@ -0,0 +1,88 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client;
+
+import com.squareup.okhttp.MediaType;
+import com.squareup.okhttp.ResponseBody;
+
+import java.io.IOException;
+
+import okio.Buffer;
+import okio.BufferedSource;
+import okio.ForwardingSource;
+import okio.Okio;
+import okio.Source;
+
+public class ProgressResponseBody extends ResponseBody {
+
+    public interface ProgressListener {
+        void update(long bytesRead, long contentLength, boolean done);
+    }
+
+    private final ResponseBody responseBody;
+    private final ProgressListener progressListener;
+    private BufferedSource bufferedSource;
+
+    public ProgressResponseBody(ResponseBody responseBody, ProgressListener progressListener) {
+        this.responseBody = responseBody;
+        this.progressListener = progressListener;
+    }
+
+    @Override
+    public MediaType contentType() {
+        return responseBody.contentType();
+    }
+
+    @Override
+    public long contentLength() throws IOException {
+        return responseBody.contentLength();
+    }
+
+    @Override
+    public BufferedSource source() throws IOException {
+        if (bufferedSource == null) {
+            bufferedSource = Okio.buffer(source(responseBody.source()));
+        }
+        return bufferedSource;
+    }
+
+    private Source source(Source source) {
+        return new ForwardingSource(source) {
+            long totalBytesRead = 0L;
+
+            @Override
+            public long read(Buffer sink, long byteCount) throws IOException {
+                long bytesRead = super.read(sink, byteCount);
+                // read() returns the number of bytes read, or -1 if this source is exhausted.
+                totalBytesRead += bytesRead != -1 ? bytesRead : 0;
+                progressListener.update(totalBytesRead, responseBody.contentLength(), bytesRead == -1);
+                return bytesRead;
+            }
+        };
+    }
+}
+
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/StringUtil.java

@@ -0,0 +1,67 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client;
+
+
+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();
+  }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/api/FakeApi.java

@@ -0,0 +1,353 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.api;
+
+import io.swagger.client.ApiCallback;
+import io.swagger.client.ApiClient;
+import io.swagger.client.ApiException;
+import io.swagger.client.ApiResponse;
+import io.swagger.client.Configuration;
+import io.swagger.client.Pair;
+import io.swagger.client.ProgressRequestBody;
+import io.swagger.client.ProgressResponseBody;
+
+import com.google.gson.reflect.TypeToken;
+
+import java.io.IOException;
+
+import org.joda.time.LocalDate;
+import org.joda.time.DateTime;
+import java.math.BigDecimal;
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+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;
+    }
+
+    /* Build call for testEndpointParameters */
+    private com.squareup.okhttp.Call testEndpointParametersCall(BigDecimal number, Double _double, String string, byte[] _byte, Integer integer, Integer int32, Long int64, Float _float, byte[] binary, LocalDate date, DateTime dateTime, String password, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'number' is set
+        if (number == null) {
+            throw new ApiException("Missing the required parameter 'number' when calling testEndpointParameters(Async)");
+        }
+        
+        // verify the required parameter '_double' is set
+        if (_double == null) {
+            throw new ApiException("Missing the required parameter '_double' when calling testEndpointParameters(Async)");
+        }
+        
+        // verify the required parameter 'string' is set
+        if (string == null) {
+            throw new ApiException("Missing the required parameter 'string' when calling testEndpointParameters(Async)");
+        }
+        
+        // verify the required parameter '_byte' is set
+        if (_byte == null) {
+            throw new ApiException("Missing the required parameter '_byte' when calling testEndpointParameters(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/fake".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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 (_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);
+
+        final String[] localVarAccepts = {
+            "application/xml; charset=utf-8", "application/json; charset=utf-8"
+        };
+        final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            "application/xml; charset=utf-8", "application/json; charset=utf-8"
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "POST", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * 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 string None (required)
+     * @param _byte None (required)
+     * @param integer None (optional)
+     * @param int32 None (optional)
+     * @param int64 None (optional)
+     * @param _float None (optional)
+     * @param binary None (optional)
+     * @param date None (optional)
+     * @param dateTime None (optional)
+     * @param password None (optional)
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void testEndpointParameters(BigDecimal number, Double _double, String string, byte[] _byte, Integer integer, Integer int32, Long int64, Float _float, byte[] binary, LocalDate date, DateTime dateTime, String password) throws ApiException {
+        testEndpointParametersWithHttpInfo(number, _double, string, _byte, integer, int32, int64, _float, binary, date, dateTime, password);
+    }
+
+    /**
+     * 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 string None (required)
+     * @param _byte None (required)
+     * @param integer None (optional)
+     * @param int32 None (optional)
+     * @param int64 None (optional)
+     * @param _float None (optional)
+     * @param binary None (optional)
+     * @param date None (optional)
+     * @param dateTime None (optional)
+     * @param password None (optional)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> testEndpointParametersWithHttpInfo(BigDecimal number, Double _double, String string, byte[] _byte, Integer integer, Integer int32, Long int64, Float _float, byte[] binary, LocalDate date, DateTime dateTime, String password) throws ApiException {
+        com.squareup.okhttp.Call call = testEndpointParametersCall(number, _double, string, _byte, integer, int32, int64, _float, binary, date, dateTime, password, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트  (asynchronously)
+     * 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 string None (required)
+     * @param _byte None (required)
+     * @param integer None (optional)
+     * @param int32 None (optional)
+     * @param int64 None (optional)
+     * @param _float None (optional)
+     * @param binary None (optional)
+     * @param date None (optional)
+     * @param dateTime None (optional)
+     * @param password None (optional)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call testEndpointParametersAsync(BigDecimal number, Double _double, String string, byte[] _byte, Integer integer, Integer int32, Long int64, Float _float, byte[] binary, LocalDate date, DateTime dateTime, String password, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = testEndpointParametersCall(number, _double, string, _byte, integer, int32, int64, _float, binary, date, dateTime, password, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for testEnumQueryParameters */
+    private com.squareup.okhttp.Call testEnumQueryParametersCall(String enumQueryString, BigDecimal enumQueryInteger, Double enumQueryDouble, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+
+        // create path and map variables
+        String localVarPath = "/fake".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        if (enumQueryInteger != null)
+        localVarQueryParams.addAll(apiClient.parameterToPairs("", "enum_query_integer", enumQueryInteger));
+
+        Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+
+        Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+        if (enumQueryString != null)
+        localVarFormParams.put("enum_query_string", enumQueryString);
+        if (enumQueryDouble != null)
+        localVarFormParams.put("enum_query_double", enumQueryDouble);
+
+        final String[] localVarAccepts = {
+            "application/json"
+        };
+        final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            "application/json"
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "GET", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * To test enum query parameters
+     * 
+     * @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)
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void testEnumQueryParameters(String enumQueryString, BigDecimal enumQueryInteger, Double enumQueryDouble) throws ApiException {
+        testEnumQueryParametersWithHttpInfo(enumQueryString, enumQueryInteger, enumQueryDouble);
+    }
+
+    /**
+     * To test enum query parameters
+     * 
+     * @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)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> testEnumQueryParametersWithHttpInfo(String enumQueryString, BigDecimal enumQueryInteger, Double enumQueryDouble) throws ApiException {
+        com.squareup.okhttp.Call call = testEnumQueryParametersCall(enumQueryString, enumQueryInteger, enumQueryDouble, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * To test enum query parameters (asynchronously)
+     * 
+     * @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 callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call testEnumQueryParametersAsync(String enumQueryString, BigDecimal enumQueryInteger, Double enumQueryDouble, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = testEnumQueryParametersCall(enumQueryString, enumQueryInteger, enumQueryDouble, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/api/PetApi.java

@@ -0,0 +1,935 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.api;
+
+import io.swagger.client.ApiCallback;
+import io.swagger.client.ApiClient;
+import io.swagger.client.ApiException;
+import io.swagger.client.ApiResponse;
+import io.swagger.client.Configuration;
+import io.swagger.client.Pair;
+import io.swagger.client.ProgressRequestBody;
+import io.swagger.client.ProgressResponseBody;
+
+import com.google.gson.reflect.TypeToken;
+
+import java.io.IOException;
+
+import io.swagger.client.model.Pet;
+import java.io.File;
+import io.swagger.client.model.ModelApiResponse;
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+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;
+    }
+
+    /* Build call for addPet */
+    private com.squareup.okhttp.Call addPetCall(Pet body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = body;
+        
+        // verify the required parameter 'body' is set
+        if (body == null) {
+            throw new ApiException("Missing the required parameter 'body' when calling addPet(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/pet".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            "application/json", "application/xml"
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] { "petstore_auth" };
+        return apiClient.buildCall(localVarPath, "POST", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Add a new pet to the store
+     * 
+     * @param body Pet object that needs to be added to the store (required)
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void addPet(Pet body) throws ApiException {
+        addPetWithHttpInfo(body);
+    }
+
+    /**
+     * Add a new pet to the store
+     * 
+     * @param body Pet object that needs to be added to the store (required)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> addPetWithHttpInfo(Pet body) throws ApiException {
+        com.squareup.okhttp.Call call = addPetCall(body, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Add a new pet to the store (asynchronously)
+     * 
+     * @param body Pet object that needs to be added to the store (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call addPetAsync(Pet body, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = addPetCall(body, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for deletePet */
+    private com.squareup.okhttp.Call deletePetCall(Long petId, String apiKey, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'petId' is set
+        if (petId == null) {
+            throw new ApiException("Missing the required parameter 'petId' when calling deletePet(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/pet/{petId}".replaceAll("\\{format\\}","json")
+        .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+        if (apiKey != null)
+        localVarHeaderParams.put("api_key", apiClient.parameterToString(apiKey));
+
+        Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+        final String[] localVarAccepts = {
+            "application/xml", "application/json"
+        };
+        final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] { "petstore_auth" };
+        return apiClient.buildCall(localVarPath, "DELETE", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Deletes a pet
+     * 
+     * @param petId Pet id to delete (required)
+     * @param apiKey  (optional)
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void deletePet(Long petId, String apiKey) throws ApiException {
+        deletePetWithHttpInfo(petId, apiKey);
+    }
+
+    /**
+     * Deletes a pet
+     * 
+     * @param petId Pet id to delete (required)
+     * @param apiKey  (optional)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> deletePetWithHttpInfo(Long petId, String apiKey) throws ApiException {
+        com.squareup.okhttp.Call call = deletePetCall(petId, apiKey, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Deletes a pet (asynchronously)
+     * 
+     * @param petId Pet id to delete (required)
+     * @param apiKey  (optional)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call deletePetAsync(Long petId, String apiKey, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = deletePetCall(petId, apiKey, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for findPetsByStatus */
+    private com.squareup.okhttp.Call findPetsByStatusCall(List<String> status, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'status' is set
+        if (status == null) {
+            throw new ApiException("Missing the required parameter 'status' when calling findPetsByStatus(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/pet/findByStatus".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        if (status != null)
+        localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "status", status));
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] { "petstore_auth" };
+        return apiClient.buildCall(localVarPath, "GET", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * 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 fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public List<Pet> findPetsByStatus(List<String> status) throws ApiException {
+        ApiResponse<List<Pet>> resp = findPetsByStatusWithHttpInfo(status);
+        return resp.getData();
+    }
+
+    /**
+     * 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 ApiResponse&lt;List&lt;Pet&gt;&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<List<Pet>> findPetsByStatusWithHttpInfo(List<String> status) throws ApiException {
+        com.squareup.okhttp.Call call = findPetsByStatusCall(status, null, null);
+        Type localVarReturnType = new TypeToken<List<Pet>>(){}.getType();
+        return apiClient.execute(call, localVarReturnType);
+    }
+
+    /**
+     * Finds Pets by status (asynchronously)
+     * Multiple status values can be provided with comma separated strings
+     * @param status Status values that need to be considered for filter (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call findPetsByStatusAsync(List<String> status, final ApiCallback<List<Pet>> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = findPetsByStatusCall(status, progressListener, progressRequestListener);
+        Type localVarReturnType = new TypeToken<List<Pet>>(){}.getType();
+        apiClient.executeAsync(call, localVarReturnType, callback);
+        return call;
+    }
+    /* Build call for findPetsByTags */
+    private com.squareup.okhttp.Call findPetsByTagsCall(List<String> tags, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'tags' is set
+        if (tags == null) {
+            throw new ApiException("Missing the required parameter 'tags' when calling findPetsByTags(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/pet/findByTags".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        if (tags != null)
+        localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "tags", tags));
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] { "petstore_auth" };
+        return apiClient.buildCall(localVarPath, "GET", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * 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 List&lt;Pet&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public List<Pet> findPetsByTags(List<String> tags) throws ApiException {
+        ApiResponse<List<Pet>> resp = findPetsByTagsWithHttpInfo(tags);
+        return resp.getData();
+    }
+
+    /**
+     * 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 ApiResponse&lt;List&lt;Pet&gt;&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<List<Pet>> findPetsByTagsWithHttpInfo(List<String> tags) throws ApiException {
+        com.squareup.okhttp.Call call = findPetsByTagsCall(tags, null, null);
+        Type localVarReturnType = new TypeToken<List<Pet>>(){}.getType();
+        return apiClient.execute(call, localVarReturnType);
+    }
+
+    /**
+     * Finds Pets by tags (asynchronously)
+     * Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing.
+     * @param tags Tags to filter by (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call findPetsByTagsAsync(List<String> tags, final ApiCallback<List<Pet>> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = findPetsByTagsCall(tags, progressListener, progressRequestListener);
+        Type localVarReturnType = new TypeToken<List<Pet>>(){}.getType();
+        apiClient.executeAsync(call, localVarReturnType, callback);
+        return call;
+    }
+    /* Build call for getPetById */
+    private com.squareup.okhttp.Call getPetByIdCall(Long petId, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'petId' is set
+        if (petId == null) {
+            throw new ApiException("Missing the required parameter 'petId' when calling getPetById(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/pet/{petId}".replaceAll("\\{format\\}","json")
+        .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] { "api_key" };
+        return apiClient.buildCall(localVarPath, "GET", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Find pet by ID
+     * Returns a single pet
+     * @param petId ID of pet to return (required)
+     * @return Pet
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public Pet getPetById(Long petId) throws ApiException {
+        ApiResponse<Pet> resp = getPetByIdWithHttpInfo(petId);
+        return resp.getData();
+    }
+
+    /**
+     * Find pet by ID
+     * Returns a single pet
+     * @param petId ID of pet to return (required)
+     * @return ApiResponse&lt;Pet&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Pet> getPetByIdWithHttpInfo(Long petId) throws ApiException {
+        com.squareup.okhttp.Call call = getPetByIdCall(petId, null, null);
+        Type localVarReturnType = new TypeToken<Pet>(){}.getType();
+        return apiClient.execute(call, localVarReturnType);
+    }
+
+    /**
+     * Find pet by ID (asynchronously)
+     * Returns a single pet
+     * @param petId ID of pet to return (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call getPetByIdAsync(Long petId, final ApiCallback<Pet> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = getPetByIdCall(petId, progressListener, progressRequestListener);
+        Type localVarReturnType = new TypeToken<Pet>(){}.getType();
+        apiClient.executeAsync(call, localVarReturnType, callback);
+        return call;
+    }
+    /* Build call for updatePet */
+    private com.squareup.okhttp.Call updatePetCall(Pet body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = body;
+        
+        // verify the required parameter 'body' is set
+        if (body == null) {
+            throw new ApiException("Missing the required parameter 'body' when calling updatePet(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/pet".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            "application/json", "application/xml"
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] { "petstore_auth" };
+        return apiClient.buildCall(localVarPath, "PUT", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Update an existing pet
+     * 
+     * @param body Pet object that needs to be added to the store (required)
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void updatePet(Pet body) throws ApiException {
+        updatePetWithHttpInfo(body);
+    }
+
+    /**
+     * Update an existing pet
+     * 
+     * @param body Pet object that needs to be added to the store (required)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> updatePetWithHttpInfo(Pet body) throws ApiException {
+        com.squareup.okhttp.Call call = updatePetCall(body, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Update an existing pet (asynchronously)
+     * 
+     * @param body Pet object that needs to be added to the store (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call updatePetAsync(Pet body, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = updatePetCall(body, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for updatePetWithForm */
+    private com.squareup.okhttp.Call updatePetWithFormCall(Long petId, String name, String status, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'petId' is set
+        if (petId == null) {
+            throw new ApiException("Missing the required parameter 'petId' when calling updatePetWithForm(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/pet/{petId}".replaceAll("\\{format\\}","json")
+        .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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 = {
+            "application/xml", "application/json"
+        };
+        final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            "application/x-www-form-urlencoded"
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] { "petstore_auth" };
+        return apiClient.buildCall(localVarPath, "POST", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * 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 fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void updatePetWithForm(Long petId, String name, String status) throws ApiException {
+        updatePetWithFormWithHttpInfo(petId, name, status);
+    }
+
+    /**
+     * 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)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> updatePetWithFormWithHttpInfo(Long petId, String name, String status) throws ApiException {
+        com.squareup.okhttp.Call call = updatePetWithFormCall(petId, name, status, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Updates a pet in the store with form data (asynchronously)
+     * 
+     * @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)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call updatePetWithFormAsync(Long petId, String name, String status, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = updatePetWithFormCall(petId, name, status, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for uploadFile */
+    private com.squareup.okhttp.Call uploadFileCall(Long petId, String additionalMetadata, File file, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'petId' is set
+        if (petId == null) {
+            throw new ApiException("Missing the required parameter 'petId' when calling uploadFile(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/pet/{petId}/uploadImage".replaceAll("\\{format\\}","json")
+        .replaceAll("\\{" + "petId" + "\\}", apiClient.escapeString(petId.toString()));
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            "multipart/form-data"
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] { "petstore_auth" };
+        return apiClient.buildCall(localVarPath, "POST", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * 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 fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ModelApiResponse uploadFile(Long petId, String additionalMetadata, File file) throws ApiException {
+        ApiResponse<ModelApiResponse> resp = uploadFileWithHttpInfo(petId, additionalMetadata, file);
+        return resp.getData();
+    }
+
+    /**
+     * 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 ApiResponse&lt;ModelApiResponse&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<ModelApiResponse> uploadFileWithHttpInfo(Long petId, String additionalMetadata, File file) throws ApiException {
+        com.squareup.okhttp.Call call = uploadFileCall(petId, additionalMetadata, file, null, null);
+        Type localVarReturnType = new TypeToken<ModelApiResponse>(){}.getType();
+        return apiClient.execute(call, localVarReturnType);
+    }
+
+    /**
+     * uploads an image (asynchronously)
+     * 
+     * @param petId ID of pet to update (required)
+     * @param additionalMetadata Additional data to pass to server (optional)
+     * @param file file to upload (optional)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call uploadFileAsync(Long petId, String additionalMetadata, File file, final ApiCallback<ModelApiResponse> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = uploadFileCall(petId, additionalMetadata, file, progressListener, progressRequestListener);
+        Type localVarReturnType = new TypeToken<ModelApiResponse>(){}.getType();
+        apiClient.executeAsync(call, localVarReturnType, callback);
+        return call;
+    }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/api/StoreApi.java

@@ -0,0 +1,482 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.api;
+
+import io.swagger.client.ApiCallback;
+import io.swagger.client.ApiClient;
+import io.swagger.client.ApiException;
+import io.swagger.client.ApiResponse;
+import io.swagger.client.Configuration;
+import io.swagger.client.Pair;
+import io.swagger.client.ProgressRequestBody;
+import io.swagger.client.ProgressResponseBody;
+
+import com.google.gson.reflect.TypeToken;
+
+import java.io.IOException;
+
+import io.swagger.client.model.Order;
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+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;
+    }
+
+    /* Build call for deleteOrder */
+    private com.squareup.okhttp.Call deleteOrderCall(String orderId, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'orderId' is set
+        if (orderId == null) {
+            throw new ApiException("Missing the required parameter 'orderId' when calling deleteOrder(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/store/order/{orderId}".replaceAll("\\{format\\}","json")
+        .replaceAll("\\{" + "orderId" + "\\}", apiClient.escapeString(orderId.toString()));
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "DELETE", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Delete purchase order by ID
+     * For valid response try integer IDs with value &lt; 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 fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void deleteOrder(String orderId) throws ApiException {
+        deleteOrderWithHttpInfo(orderId);
+    }
+
+    /**
+     * Delete purchase order by ID
+     * For valid response try integer IDs with value &lt; 1000. Anything above 1000 or nonintegers will generate API errors
+     * @param orderId ID of the order that needs to be deleted (required)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> deleteOrderWithHttpInfo(String orderId) throws ApiException {
+        com.squareup.okhttp.Call call = deleteOrderCall(orderId, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Delete purchase order by ID (asynchronously)
+     * For valid response try integer IDs with value &lt; 1000. Anything above 1000 or nonintegers will generate API errors
+     * @param orderId ID of the order that needs to be deleted (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call deleteOrderAsync(String orderId, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = deleteOrderCall(orderId, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for getInventory */
+    private com.squareup.okhttp.Call getInventoryCall(final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+
+        // create path and map variables
+        String localVarPath = "/store/inventory".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = new HashMap<String, String>();
+
+        Map<String, Object> localVarFormParams = new HashMap<String, Object>();
+
+        final String[] localVarAccepts = {
+            "application/json"
+        };
+        final String localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] { "api_key" };
+        return apiClient.buildCall(localVarPath, "GET", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Returns pet inventories by status
+     * Returns a map of status codes to quantities
+     * @return Map&lt;String, Integer&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public Map<String, Integer> getInventory() throws ApiException {
+        ApiResponse<Map<String, Integer>> resp = getInventoryWithHttpInfo();
+        return resp.getData();
+    }
+
+    /**
+     * Returns pet inventories by status
+     * Returns a map of status codes to quantities
+     * @return ApiResponse&lt;Map&lt;String, Integer&gt;&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Map<String, Integer>> getInventoryWithHttpInfo() throws ApiException {
+        com.squareup.okhttp.Call call = getInventoryCall(null, null);
+        Type localVarReturnType = new TypeToken<Map<String, Integer>>(){}.getType();
+        return apiClient.execute(call, localVarReturnType);
+    }
+
+    /**
+     * Returns pet inventories by status (asynchronously)
+     * Returns a map of status codes to quantities
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call getInventoryAsync(final ApiCallback<Map<String, Integer>> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = getInventoryCall(progressListener, progressRequestListener);
+        Type localVarReturnType = new TypeToken<Map<String, Integer>>(){}.getType();
+        apiClient.executeAsync(call, localVarReturnType, callback);
+        return call;
+    }
+    /* Build call for getOrderById */
+    private com.squareup.okhttp.Call getOrderByIdCall(Long orderId, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'orderId' is set
+        if (orderId == null) {
+            throw new ApiException("Missing the required parameter 'orderId' when calling getOrderById(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/store/order/{orderId}".replaceAll("\\{format\\}","json")
+        .replaceAll("\\{" + "orderId" + "\\}", apiClient.escapeString(orderId.toString()));
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "GET", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * 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 fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public Order getOrderById(Long orderId) throws ApiException {
+        ApiResponse<Order> resp = getOrderByIdWithHttpInfo(orderId);
+        return resp.getData();
+    }
+
+    /**
+     * 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 ApiResponse&lt;Order&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Order> getOrderByIdWithHttpInfo(Long orderId) throws ApiException {
+        com.squareup.okhttp.Call call = getOrderByIdCall(orderId, null, null);
+        Type localVarReturnType = new TypeToken<Order>(){}.getType();
+        return apiClient.execute(call, localVarReturnType);
+    }
+
+    /**
+     * Find purchase order by ID (asynchronously)
+     * 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)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call getOrderByIdAsync(Long orderId, final ApiCallback<Order> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = getOrderByIdCall(orderId, progressListener, progressRequestListener);
+        Type localVarReturnType = new TypeToken<Order>(){}.getType();
+        apiClient.executeAsync(call, localVarReturnType, callback);
+        return call;
+    }
+    /* Build call for placeOrder */
+    private com.squareup.okhttp.Call placeOrderCall(Order body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = body;
+        
+        // verify the required parameter 'body' is set
+        if (body == null) {
+            throw new ApiException("Missing the required parameter 'body' when calling placeOrder(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/store/order".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "POST", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Place an order for a pet
+     * 
+     * @param body order placed for purchasing the pet (required)
+     * @return Order
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public Order placeOrder(Order body) throws ApiException {
+        ApiResponse<Order> resp = placeOrderWithHttpInfo(body);
+        return resp.getData();
+    }
+
+    /**
+     * Place an order for a pet
+     * 
+     * @param body order placed for purchasing the pet (required)
+     * @return ApiResponse&lt;Order&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Order> placeOrderWithHttpInfo(Order body) throws ApiException {
+        com.squareup.okhttp.Call call = placeOrderCall(body, null, null);
+        Type localVarReturnType = new TypeToken<Order>(){}.getType();
+        return apiClient.execute(call, localVarReturnType);
+    }
+
+    /**
+     * Place an order for a pet (asynchronously)
+     * 
+     * @param body order placed for purchasing the pet (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call placeOrderAsync(Order body, final ApiCallback<Order> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = placeOrderCall(body, progressListener, progressRequestListener);
+        Type localVarReturnType = new TypeToken<Order>(){}.getType();
+        apiClient.executeAsync(call, localVarReturnType, callback);
+        return call;
+    }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/api/UserApi.java

@@ -0,0 +1,907 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.api;
+
+import io.swagger.client.ApiCallback;
+import io.swagger.client.ApiClient;
+import io.swagger.client.ApiException;
+import io.swagger.client.ApiResponse;
+import io.swagger.client.Configuration;
+import io.swagger.client.Pair;
+import io.swagger.client.ProgressRequestBody;
+import io.swagger.client.ProgressResponseBody;
+
+import com.google.gson.reflect.TypeToken;
+
+import java.io.IOException;
+
+import io.swagger.client.model.User;
+
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+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;
+    }
+
+    /* Build call for createUser */
+    private com.squareup.okhttp.Call createUserCall(User body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = body;
+        
+        // verify the required parameter 'body' is set
+        if (body == null) {
+            throw new ApiException("Missing the required parameter 'body' when calling createUser(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/user".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "POST", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Create user
+     * This can only be done by the logged in user.
+     * @param body Created user object (required)
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void createUser(User body) throws ApiException {
+        createUserWithHttpInfo(body);
+    }
+
+    /**
+     * Create user
+     * This can only be done by the logged in user.
+     * @param body Created user object (required)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> createUserWithHttpInfo(User body) throws ApiException {
+        com.squareup.okhttp.Call call = createUserCall(body, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Create user (asynchronously)
+     * This can only be done by the logged in user.
+     * @param body Created user object (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call createUserAsync(User body, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = createUserCall(body, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for createUsersWithArrayInput */
+    private com.squareup.okhttp.Call createUsersWithArrayInputCall(List<User> body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = body;
+        
+        // verify the required parameter 'body' is set
+        if (body == null) {
+            throw new ApiException("Missing the required parameter 'body' when calling createUsersWithArrayInput(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/user/createWithArray".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "POST", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param body List of user object (required)
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void createUsersWithArrayInput(List<User> body) throws ApiException {
+        createUsersWithArrayInputWithHttpInfo(body);
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param body List of user object (required)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> createUsersWithArrayInputWithHttpInfo(List<User> body) throws ApiException {
+        com.squareup.okhttp.Call call = createUsersWithArrayInputCall(body, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Creates list of users with given input array (asynchronously)
+     * 
+     * @param body List of user object (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call createUsersWithArrayInputAsync(List<User> body, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = createUsersWithArrayInputCall(body, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for createUsersWithListInput */
+    private com.squareup.okhttp.Call createUsersWithListInputCall(List<User> body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = body;
+        
+        // verify the required parameter 'body' is set
+        if (body == null) {
+            throw new ApiException("Missing the required parameter 'body' when calling createUsersWithListInput(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/user/createWithList".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "POST", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param body List of user object (required)
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void createUsersWithListInput(List<User> body) throws ApiException {
+        createUsersWithListInputWithHttpInfo(body);
+    }
+
+    /**
+     * Creates list of users with given input array
+     * 
+     * @param body List of user object (required)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> createUsersWithListInputWithHttpInfo(List<User> body) throws ApiException {
+        com.squareup.okhttp.Call call = createUsersWithListInputCall(body, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Creates list of users with given input array (asynchronously)
+     * 
+     * @param body List of user object (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call createUsersWithListInputAsync(List<User> body, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = createUsersWithListInputCall(body, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for deleteUser */
+    private com.squareup.okhttp.Call deleteUserCall(String username, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'username' is set
+        if (username == null) {
+            throw new ApiException("Missing the required parameter 'username' when calling deleteUser(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/user/{username}".replaceAll("\\{format\\}","json")
+        .replaceAll("\\{" + "username" + "\\}", apiClient.escapeString(username.toString()));
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "DELETE", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * 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 fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void deleteUser(String username) throws ApiException {
+        deleteUserWithHttpInfo(username);
+    }
+
+    /**
+     * Delete user
+     * This can only be done by the logged in user.
+     * @param username The name that needs to be deleted (required)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> deleteUserWithHttpInfo(String username) throws ApiException {
+        com.squareup.okhttp.Call call = deleteUserCall(username, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Delete user (asynchronously)
+     * This can only be done by the logged in user.
+     * @param username The name that needs to be deleted (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call deleteUserAsync(String username, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = deleteUserCall(username, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for getUserByName */
+    private com.squareup.okhttp.Call getUserByNameCall(String username, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'username' is set
+        if (username == null) {
+            throw new ApiException("Missing the required parameter 'username' when calling getUserByName(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/user/{username}".replaceAll("\\{format\\}","json")
+        .replaceAll("\\{" + "username" + "\\}", apiClient.escapeString(username.toString()));
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "GET", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Get user by user name
+     * 
+     * @param username The name that needs to be fetched. Use user1 for testing.  (required)
+     * @return User
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public User getUserByName(String username) throws ApiException {
+        ApiResponse<User> resp = getUserByNameWithHttpInfo(username);
+        return resp.getData();
+    }
+
+    /**
+     * Get user by user name
+     * 
+     * @param username The name that needs to be fetched. Use user1 for testing.  (required)
+     * @return ApiResponse&lt;User&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<User> getUserByNameWithHttpInfo(String username) throws ApiException {
+        com.squareup.okhttp.Call call = getUserByNameCall(username, null, null);
+        Type localVarReturnType = new TypeToken<User>(){}.getType();
+        return apiClient.execute(call, localVarReturnType);
+    }
+
+    /**
+     * Get user by user name (asynchronously)
+     * 
+     * @param username The name that needs to be fetched. Use user1 for testing.  (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call getUserByNameAsync(String username, final ApiCallback<User> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = getUserByNameCall(username, progressListener, progressRequestListener);
+        Type localVarReturnType = new TypeToken<User>(){}.getType();
+        apiClient.executeAsync(call, localVarReturnType, callback);
+        return call;
+    }
+    /* Build call for loginUser */
+    private com.squareup.okhttp.Call loginUserCall(String username, String password, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+        // verify the required parameter 'username' is set
+        if (username == null) {
+            throw new ApiException("Missing the required parameter 'username' when calling loginUser(Async)");
+        }
+        
+        // verify the required parameter 'password' is set
+        if (password == null) {
+            throw new ApiException("Missing the required parameter 'password' when calling loginUser(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/user/login".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+        if (username != null)
+        localVarQueryParams.addAll(apiClient.parameterToPairs("", "username", username));
+        if (password != null)
+        localVarQueryParams.addAll(apiClient.parameterToPairs("", "password", password));
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "GET", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * 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 fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public String loginUser(String username, String password) throws ApiException {
+        ApiResponse<String> resp = loginUserWithHttpInfo(username, password);
+        return resp.getData();
+    }
+
+    /**
+     * Logs user into the system
+     * 
+     * @param username The user name for login (required)
+     * @param password The password for login in clear text (required)
+     * @return ApiResponse&lt;String&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<String> loginUserWithHttpInfo(String username, String password) throws ApiException {
+        com.squareup.okhttp.Call call = loginUserCall(username, password, null, null);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        return apiClient.execute(call, localVarReturnType);
+    }
+
+    /**
+     * Logs user into the system (asynchronously)
+     * 
+     * @param username The user name for login (required)
+     * @param password The password for login in clear text (required)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call loginUserAsync(String username, String password, final ApiCallback<String> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = loginUserCall(username, password, progressListener, progressRequestListener);
+        Type localVarReturnType = new TypeToken<String>(){}.getType();
+        apiClient.executeAsync(call, localVarReturnType, callback);
+        return call;
+    }
+    /* Build call for logoutUser */
+    private com.squareup.okhttp.Call logoutUserCall(final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = null;
+        
+
+        // create path and map variables
+        String localVarPath = "/user/logout".replaceAll("\\{format\\}","json");
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "GET", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * Logs out current logged in user session
+     * 
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void logoutUser() throws ApiException {
+        logoutUserWithHttpInfo();
+    }
+
+    /**
+     * Logs out current logged in user session
+     * 
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> logoutUserWithHttpInfo() throws ApiException {
+        com.squareup.okhttp.Call call = logoutUserCall(null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Logs out current logged in user session (asynchronously)
+     * 
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call logoutUserAsync(final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = logoutUserCall(progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+    /* Build call for updateUser */
+    private com.squareup.okhttp.Call updateUserCall(String username, User body, final ProgressResponseBody.ProgressListener progressListener, final ProgressRequestBody.ProgressRequestListener progressRequestListener) throws ApiException {
+        Object localVarPostBody = body;
+        
+        // verify the required parameter 'username' is set
+        if (username == null) {
+            throw new ApiException("Missing the required parameter 'username' when calling updateUser(Async)");
+        }
+        
+        // verify the required parameter 'body' is set
+        if (body == null) {
+            throw new ApiException("Missing the required parameter 'body' when calling updateUser(Async)");
+        }
+        
+
+        // create path and map variables
+        String localVarPath = "/user/{username}".replaceAll("\\{format\\}","json")
+        .replaceAll("\\{" + "username" + "\\}", apiClient.escapeString(username.toString()));
+
+        List<Pair> localVarQueryParams = new ArrayList<Pair>();
+
+        Map<String, String> localVarHeaderParams = 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);
+        if (localVarAccept != null) localVarHeaderParams.put("Accept", localVarAccept);
+
+        final String[] localVarContentTypes = {
+            
+        };
+        final String localVarContentType = apiClient.selectHeaderContentType(localVarContentTypes);
+        localVarHeaderParams.put("Content-Type", localVarContentType);
+
+        if(progressListener != null) {
+            apiClient.getHttpClient().networkInterceptors().add(new com.squareup.okhttp.Interceptor() {
+                @Override
+                public com.squareup.okhttp.Response intercept(com.squareup.okhttp.Interceptor.Chain chain) throws IOException {
+                    com.squareup.okhttp.Response originalResponse = chain.proceed(chain.request());
+                    return originalResponse.newBuilder()
+                    .body(new ProgressResponseBody(originalResponse.body(), progressListener))
+                    .build();
+                }
+            });
+        }
+
+        String[] localVarAuthNames = new String[] {  };
+        return apiClient.buildCall(localVarPath, "PUT", localVarQueryParams, localVarPostBody, localVarHeaderParams, localVarFormParams, localVarAuthNames, progressRequestListener);
+    }
+
+    /**
+     * 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 fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public void updateUser(String username, User body) throws ApiException {
+        updateUserWithHttpInfo(username, body);
+    }
+
+    /**
+     * 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)
+     * @return ApiResponse&lt;Void&gt;
+     * @throws ApiException If fail to call the API, e.g. server error or cannot deserialize the response body
+     */
+    public ApiResponse<Void> updateUserWithHttpInfo(String username, User body) throws ApiException {
+        com.squareup.okhttp.Call call = updateUserCall(username, body, null, null);
+        return apiClient.execute(call);
+    }
+
+    /**
+     * Updated user (asynchronously)
+     * 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)
+     * @param callback The callback to be executed when the API call finishes
+     * @return The request call
+     * @throws ApiException If fail to process the API call, e.g. serializing the request body object
+     */
+    public com.squareup.okhttp.Call updateUserAsync(String username, User body, final ApiCallback<Void> callback) throws ApiException {
+
+        ProgressResponseBody.ProgressListener progressListener = null;
+        ProgressRequestBody.ProgressRequestListener progressRequestListener = null;
+
+        if (callback != null) {
+            progressListener = new ProgressResponseBody.ProgressListener() {
+                @Override
+                public void update(long bytesRead, long contentLength, boolean done) {
+                    callback.onDownloadProgress(bytesRead, contentLength, done);
+                }
+            };
+
+            progressRequestListener = new ProgressRequestBody.ProgressRequestListener() {
+                @Override
+                public void onRequestProgress(long bytesWritten, long contentLength, boolean done) {
+                    callback.onUploadProgress(bytesWritten, contentLength, done);
+                }
+            };
+        }
+
+        com.squareup.okhttp.Call call = updateUserCall(username, body, progressListener, progressRequestListener);
+        apiClient.executeAsync(call, callback);
+        return call;
+    }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/auth/ApiKeyAuth.java

@@ -0,0 +1,87 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.auth;
+
+import io.swagger.client.Pair;
+
+import java.util.Map;
+import java.util.List;
+
+
+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) {
+    if (apiKey == null) {
+      return;
+    }
+    String value;
+    if (apiKeyPrefix != null) {
+      value = apiKeyPrefix + " " + apiKey;
+    } else {
+      value = apiKey;
+    }
+    if (location == "query") {
+      queryParams.add(new Pair(paramName, value));
+    } else if (location == "header") {
+      headerParams.put(paramName, value);
+    }
+  }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/auth/Authentication.java

@@ -0,0 +1,41 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.auth;
+
+import io.swagger.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
+     */
+    void applyToParams(List<Pair> queryParams, Map<String, String> headerParams);
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/auth/HttpBasicAuth.java

@@ -0,0 +1,66 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.auth;
+
+import io.swagger.client.Pair;
+
+import com.squareup.okhttp.Credentials;
+
+import java.util.Map;
+import java.util.List;
+
+import java.io.UnsupportedEncodingException;
+
+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) {
+        if (username == null && password == null) {
+            return;
+        }
+        headerParams.put("Authorization", Credentials.basic(
+            username == null ? "" : username,
+            password == null ? "" : password));
+    }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/auth/OAuth.java

@@ -0,0 +1,51 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.auth;
+
+import io.swagger.client.Pair;
+
+import java.util.Map;
+import java.util.List;
+
+
+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) {
+    if (accessToken != null) {
+      headerParams.put("Authorization", "Bearer " + accessToken);
+    }
+  }
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/auth/OAuthFlow.java

@@ -0,0 +1,30 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.auth;
+
+public enum OAuthFlow {
+    accessCode, implicit, password, application
+}

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/AdditionalPropertiesClass.java

@@ -0,0 +1,125 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * AdditionalPropertiesClass
+ */
+
+public class AdditionalPropertiesClass {
+  @SerializedName("map_property")
+  private Map<String, String> mapProperty = new HashMap<String, String>();
+
+  @SerializedName("map_of_map_property")
+  private Map<String, Map<String, String>> mapOfMapProperty = new HashMap<String, Map<String, String>>();
+
+  public AdditionalPropertiesClass mapProperty(Map<String, String> mapProperty) {
+    this.mapProperty = mapProperty;
+    return this;
+  }
+
+   /**
+   * Get mapProperty
+   * @return mapProperty
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Map<String, String> getMapProperty() {
+    return mapProperty;
+  }
+
+  public void setMapProperty(Map<String, String> mapProperty) {
+    this.mapProperty = mapProperty;
+  }
+
+  public AdditionalPropertiesClass mapOfMapProperty(Map<String, Map<String, String>> mapOfMapProperty) {
+    this.mapOfMapProperty = mapOfMapProperty;
+    return this;
+  }
+
+   /**
+   * Get mapOfMapProperty
+   * @return mapOfMapProperty
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Map<String, Map<String, String>> getMapOfMapProperty() {
+    return mapOfMapProperty;
+  }
+
+  public void setMapOfMapProperty(Map<String, Map<String, String>> mapOfMapProperty) {
+    this.mapOfMapProperty = mapOfMapProperty;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    AdditionalPropertiesClass additionalPropertiesClass = (AdditionalPropertiesClass) o;
+    return Objects.equals(this.mapProperty, additionalPropertiesClass.mapProperty) &&
+        Objects.equals(this.mapOfMapProperty, additionalPropertiesClass.mapOfMapProperty);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(mapProperty, mapOfMapProperty);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AdditionalPropertiesClass {\n");
+    
+    sb.append("    mapProperty: ").append(toIndentedString(mapProperty)).append("\n");
+    sb.append("    mapOfMapProperty: ").append(toIndentedString(mapOfMapProperty)).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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Animal.java

@@ -0,0 +1,122 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * Animal
+ */
+
+public class Animal {
+  @SerializedName("className")
+  private String className = null;
+
+  @SerializedName("color")
+  private String color = "red";
+
+  public Animal className(String className) {
+    this.className = className;
+    return this;
+  }
+
+   /**
+   * Get className
+   * @return className
+  **/
+  @ApiModelProperty(example = "null", required = true, value = "")
+  public String getClassName() {
+    return className;
+  }
+
+  public void setClassName(String className) {
+    this.className = className;
+  }
+
+  public Animal color(String color) {
+    this.color = color;
+    return this;
+  }
+
+   /**
+   * Get color
+   * @return color
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getColor() {
+    return color;
+  }
+
+  public void setColor(String color) {
+    this.color = color;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/AnimalFarm.java

@@ -0,0 +1,76 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import io.swagger.client.model.Animal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * AnimalFarm
+ */
+
+public class AnimalFarm extends ArrayList<Animal> {
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    return true;
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class AnimalFarm {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/ArrayOfArrayOfNumberOnly.java

@@ -0,0 +1,102 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * ArrayOfArrayOfNumberOnly
+ */
+
+public class ArrayOfArrayOfNumberOnly {
+  @SerializedName("ArrayArrayNumber")
+  private List<List<BigDecimal>> arrayArrayNumber = new ArrayList<List<BigDecimal>>();
+
+  public ArrayOfArrayOfNumberOnly arrayArrayNumber(List<List<BigDecimal>> arrayArrayNumber) {
+    this.arrayArrayNumber = arrayArrayNumber;
+    return this;
+  }
+
+   /**
+   * Get arrayArrayNumber
+   * @return arrayArrayNumber
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public List<List<BigDecimal>> getArrayArrayNumber() {
+    return arrayArrayNumber;
+  }
+
+  public void setArrayArrayNumber(List<List<BigDecimal>> arrayArrayNumber) {
+    this.arrayArrayNumber = arrayArrayNumber;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/ArrayOfNumberOnly.java

@@ -0,0 +1,102 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * ArrayOfNumberOnly
+ */
+
+public class ArrayOfNumberOnly {
+  @SerializedName("ArrayNumber")
+  private List<BigDecimal> arrayNumber = new ArrayList<BigDecimal>();
+
+  public ArrayOfNumberOnly arrayNumber(List<BigDecimal> arrayNumber) {
+    this.arrayNumber = arrayNumber;
+    return this;
+  }
+
+   /**
+   * Get arrayNumber
+   * @return arrayNumber
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public List<BigDecimal> getArrayNumber() {
+    return arrayNumber;
+  }
+
+  public void setArrayNumber(List<BigDecimal> arrayNumber) {
+    this.arrayNumber = arrayNumber;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/ArrayTest.java

@@ -0,0 +1,148 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import io.swagger.client.model.ReadOnlyFirst;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * ArrayTest
+ */
+
+public class ArrayTest {
+  @SerializedName("array_of_string")
+  private List<String> arrayOfString = new ArrayList<String>();
+
+  @SerializedName("array_array_of_integer")
+  private List<List<Long>> arrayArrayOfInteger = new ArrayList<List<Long>>();
+
+  @SerializedName("array_array_of_model")
+  private List<List<ReadOnlyFirst>> arrayArrayOfModel = new ArrayList<List<ReadOnlyFirst>>();
+
+  public ArrayTest arrayOfString(List<String> arrayOfString) {
+    this.arrayOfString = arrayOfString;
+    return this;
+  }
+
+   /**
+   * Get arrayOfString
+   * @return arrayOfString
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public List<String> getArrayOfString() {
+    return arrayOfString;
+  }
+
+  public void setArrayOfString(List<String> arrayOfString) {
+    this.arrayOfString = arrayOfString;
+  }
+
+  public ArrayTest arrayArrayOfInteger(List<List<Long>> arrayArrayOfInteger) {
+    this.arrayArrayOfInteger = arrayArrayOfInteger;
+    return this;
+  }
+
+   /**
+   * Get arrayArrayOfInteger
+   * @return arrayArrayOfInteger
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public List<List<Long>> getArrayArrayOfInteger() {
+    return arrayArrayOfInteger;
+  }
+
+  public void setArrayArrayOfInteger(List<List<Long>> arrayArrayOfInteger) {
+    this.arrayArrayOfInteger = arrayArrayOfInteger;
+  }
+
+  public ArrayTest arrayArrayOfModel(List<List<ReadOnlyFirst>> arrayArrayOfModel) {
+    this.arrayArrayOfModel = arrayArrayOfModel;
+    return this;
+  }
+
+   /**
+   * Get arrayArrayOfModel
+   * @return arrayArrayOfModel
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public List<List<ReadOnlyFirst>> getArrayArrayOfModel() {
+    return arrayArrayOfModel;
+  }
+
+  public void setArrayArrayOfModel(List<List<ReadOnlyFirst>> arrayArrayOfModel) {
+    this.arrayArrayOfModel = arrayArrayOfModel;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Cat.java

@@ -0,0 +1,147 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import io.swagger.client.model.Animal;
+
+/**
+ * Cat
+ */
+
+public class Cat extends Animal {
+  @SerializedName("className")
+  private String className = null;
+
+  @SerializedName("color")
+  private String color = "red";
+
+  @SerializedName("declawed")
+  private Boolean declawed = null;
+
+  public Cat className(String className) {
+    this.className = className;
+    return this;
+  }
+
+   /**
+   * Get className
+   * @return className
+  **/
+  @ApiModelProperty(example = "null", required = true, value = "")
+  public String getClassName() {
+    return className;
+  }
+
+  public void setClassName(String className) {
+    this.className = className;
+  }
+
+  public Cat color(String color) {
+    this.color = color;
+    return this;
+  }
+
+   /**
+   * Get color
+   * @return color
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getColor() {
+    return color;
+  }
+
+  public void setColor(String color) {
+    this.color = color;
+  }
+
+  public Cat declawed(Boolean declawed) {
+    this.declawed = declawed;
+    return this;
+  }
+
+   /**
+   * Get declawed
+   * @return declawed
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Boolean getDeclawed() {
+    return declawed;
+  }
+
+  public void setDeclawed(Boolean declawed) {
+    this.declawed = declawed;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Cat cat = (Cat) o;
+    return Objects.equals(this.className, cat.className) &&
+        Objects.equals(this.color, cat.color) &&
+        Objects.equals(this.declawed, cat.declawed) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(className, color, 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("    className: ").append(toIndentedString(className)).append("\n");
+    sb.append("    color: ").append(toIndentedString(color)).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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Category.java

@@ -0,0 +1,122 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * Category
+ */
+
+public class Category {
+  @SerializedName("id")
+  private Long id = null;
+
+  @SerializedName("name")
+  private String name = null;
+
+  public Category id(Long id) {
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Long getId() {
+    return id;
+  }
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  public Category name(String name) {
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Dog.java

@@ -0,0 +1,147 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import io.swagger.client.model.Animal;
+
+/**
+ * Dog
+ */
+
+public class Dog extends Animal {
+  @SerializedName("className")
+  private String className = null;
+
+  @SerializedName("color")
+  private String color = "red";
+
+  @SerializedName("breed")
+  private String breed = null;
+
+  public Dog className(String className) {
+    this.className = className;
+    return this;
+  }
+
+   /**
+   * Get className
+   * @return className
+  **/
+  @ApiModelProperty(example = "null", required = true, value = "")
+  public String getClassName() {
+    return className;
+  }
+
+  public void setClassName(String className) {
+    this.className = className;
+  }
+
+  public Dog color(String color) {
+    this.color = color;
+    return this;
+  }
+
+   /**
+   * Get color
+   * @return color
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getColor() {
+    return color;
+  }
+
+  public void setColor(String color) {
+    this.color = color;
+  }
+
+  public Dog breed(String breed) {
+    this.breed = breed;
+    return this;
+  }
+
+   /**
+   * Get breed
+   * @return breed
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getBreed() {
+    return breed;
+  }
+
+  public void setBreed(String breed) {
+    this.breed = breed;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Dog dog = (Dog) o;
+    return Objects.equals(this.className, dog.className) &&
+        Objects.equals(this.color, dog.color) &&
+        Objects.equals(this.breed, dog.breed) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(className, color, 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("    className: ").append(toIndentedString(className)).append("\n");
+    sb.append("    color: ").append(toIndentedString(color)).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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/EnumClass.java

@@ -0,0 +1,56 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+
+/**
+ * Gets or Sets EnumClass
+ */
+public enum EnumClass {
+  
+  @SerializedName("_abc")
+  _ABC("_abc"),
+  
+  @SerializedName("-efg")
+  _EFG("-efg"),
+  
+  @SerializedName("(xyz)")
+  _XYZ_("(xyz)");
+
+  private String value;
+
+  EnumClass(String value) {
+    this.value = value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/EnumTest.java

@@ -0,0 +1,211 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * EnumTest
+ */
+
+public class EnumTest {
+  /**
+   * Gets or Sets enumString
+   */
+  public enum EnumStringEnum {
+    @SerializedName("UPPER")
+    UPPER("UPPER"),
+    
+    @SerializedName("lower")
+    LOWER("lower");
+
+    private String value;
+
+    EnumStringEnum(String value) {
+      this.value = value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+  }
+
+  @SerializedName("enum_string")
+  private EnumStringEnum enumString = null;
+
+  /**
+   * Gets or Sets enumInteger
+   */
+  public enum EnumIntegerEnum {
+    @SerializedName("1")
+    NUMBER_1(1),
+    
+    @SerializedName("-1")
+    NUMBER_MINUS_1(-1);
+
+    private Integer value;
+
+    EnumIntegerEnum(Integer value) {
+      this.value = value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+  }
+
+  @SerializedName("enum_integer")
+  private EnumIntegerEnum enumInteger = null;
+
+  /**
+   * Gets or Sets enumNumber
+   */
+  public enum EnumNumberEnum {
+    @SerializedName("1.1")
+    NUMBER_1_DOT_1(1.1),
+    
+    @SerializedName("-1.2")
+    NUMBER_MINUS_1_DOT_2(-1.2);
+
+    private Double value;
+
+    EnumNumberEnum(Double value) {
+      this.value = value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+  }
+
+  @SerializedName("enum_number")
+  private EnumNumberEnum enumNumber = null;
+
+  public EnumTest enumString(EnumStringEnum enumString) {
+    this.enumString = enumString;
+    return this;
+  }
+
+   /**
+   * Get enumString
+   * @return enumString
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public EnumStringEnum getEnumString() {
+    return enumString;
+  }
+
+  public void setEnumString(EnumStringEnum enumString) {
+    this.enumString = enumString;
+  }
+
+  public EnumTest enumInteger(EnumIntegerEnum enumInteger) {
+    this.enumInteger = enumInteger;
+    return this;
+  }
+
+   /**
+   * Get enumInteger
+   * @return enumInteger
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public EnumIntegerEnum getEnumInteger() {
+    return enumInteger;
+  }
+
+  public void setEnumInteger(EnumIntegerEnum enumInteger) {
+    this.enumInteger = enumInteger;
+  }
+
+  public EnumTest enumNumber(EnumNumberEnum enumNumber) {
+    this.enumNumber = enumNumber;
+    return this;
+  }
+
+   /**
+   * Get enumNumber
+   * @return enumNumber
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public EnumNumberEnum getEnumNumber() {
+    return enumNumber;
+  }
+
+  public void setEnumNumber(EnumNumberEnum enumNumber) {
+    this.enumNumber = enumNumber;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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.enumInteger, enumTest.enumInteger) &&
+        Objects.equals(this.enumNumber, enumTest.enumNumber);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(enumString, enumInteger, enumNumber);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class EnumTest {\n");
+    
+    sb.append("    enumString: ").append(toIndentedString(enumString)).append("\n");
+    sb.append("    enumInteger: ").append(toIndentedString(enumInteger)).append("\n");
+    sb.append("    enumNumber: ").append(toIndentedString(enumNumber)).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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/FormatTest.java

@@ -0,0 +1,388 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+import org.joda.time.DateTime;
+import org.joda.time.LocalDate;
+
+/**
+ * FormatTest
+ */
+
+public class FormatTest {
+  @SerializedName("integer")
+  private Integer integer = null;
+
+  @SerializedName("int32")
+  private Integer int32 = null;
+
+  @SerializedName("int64")
+  private Long int64 = null;
+
+  @SerializedName("number")
+  private BigDecimal number = null;
+
+  @SerializedName("float")
+  private Float _float = null;
+
+  @SerializedName("double")
+  private Double _double = null;
+
+  @SerializedName("string")
+  private String string = null;
+
+  @SerializedName("byte")
+  private byte[] _byte = null;
+
+  @SerializedName("binary")
+  private byte[] binary = null;
+
+  @SerializedName("date")
+  private LocalDate date = null;
+
+  @SerializedName("dateTime")
+  private DateTime dateTime = null;
+
+  @SerializedName("uuid")
+  private String uuid = null;
+
+  @SerializedName("password")
+  private String password = null;
+
+  public FormatTest integer(Integer integer) {
+    this.integer = integer;
+    return this;
+  }
+
+   /**
+   * Get integer
+   * minimum: 10.0
+   * maximum: 100.0
+   * @return integer
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Integer getInteger() {
+    return integer;
+  }
+
+  public void setInteger(Integer integer) {
+    this.integer = integer;
+  }
+
+  public FormatTest int32(Integer int32) {
+    this.int32 = int32;
+    return this;
+  }
+
+   /**
+   * Get int32
+   * minimum: 20.0
+   * maximum: 200.0
+   * @return int32
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Integer getInt32() {
+    return int32;
+  }
+
+  public void setInt32(Integer int32) {
+    this.int32 = int32;
+  }
+
+  public FormatTest int64(Long int64) {
+    this.int64 = int64;
+    return this;
+  }
+
+   /**
+   * Get int64
+   * @return int64
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Long getInt64() {
+    return int64;
+  }
+
+  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
+  **/
+  @ApiModelProperty(example = "null", required = true, value = "")
+  public BigDecimal getNumber() {
+    return number;
+  }
+
+  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
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Float getFloat() {
+    return _float;
+  }
+
+  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
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Double getDouble() {
+    return _double;
+  }
+
+  public void setDouble(Double _double) {
+    this._double = _double;
+  }
+
+  public FormatTest string(String string) {
+    this.string = string;
+    return this;
+  }
+
+   /**
+   * Get string
+   * @return string
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getString() {
+    return string;
+  }
+
+  public void setString(String string) {
+    this.string = string;
+  }
+
+  public FormatTest _byte(byte[] _byte) {
+    this._byte = _byte;
+    return this;
+  }
+
+   /**
+   * Get _byte
+   * @return _byte
+  **/
+  @ApiModelProperty(example = "null", required = true, value = "")
+  public byte[] getByte() {
+    return _byte;
+  }
+
+  public void setByte(byte[] _byte) {
+    this._byte = _byte;
+  }
+
+  public FormatTest binary(byte[] binary) {
+    this.binary = binary;
+    return this;
+  }
+
+   /**
+   * Get binary
+   * @return binary
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public byte[] getBinary() {
+    return binary;
+  }
+
+  public void setBinary(byte[] binary) {
+    this.binary = binary;
+  }
+
+  public FormatTest date(LocalDate date) {
+    this.date = date;
+    return this;
+  }
+
+   /**
+   * Get date
+   * @return date
+  **/
+  @ApiModelProperty(example = "null", required = true, value = "")
+  public LocalDate getDate() {
+    return date;
+  }
+
+  public void setDate(LocalDate date) {
+    this.date = date;
+  }
+
+  public FormatTest dateTime(DateTime dateTime) {
+    this.dateTime = dateTime;
+    return this;
+  }
+
+   /**
+   * Get dateTime
+   * @return dateTime
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public DateTime getDateTime() {
+    return dateTime;
+  }
+
+  public void setDateTime(DateTime dateTime) {
+    this.dateTime = dateTime;
+  }
+
+  public FormatTest uuid(String uuid) {
+    this.uuid = uuid;
+    return this;
+  }
+
+   /**
+   * Get uuid
+   * @return uuid
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getUuid() {
+    return uuid;
+  }
+
+  public void setUuid(String uuid) {
+    this.uuid = uuid;
+  }
+
+  public FormatTest password(String password) {
+    this.password = password;
+    return this;
+  }
+
+   /**
+   * Get password
+   * @return password
+  **/
+  @ApiModelProperty(example = "null", required = true, value = "")
+  public String getPassword() {
+    return password;
+  }
+
+  public void setPassword(String password) {
+    this.password = password;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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) &&
+        Objects.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);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(integer, int32, int64, number, _float, _double, string, _byte, binary, date, dateTime, uuid, password);
+  }
+
+  @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("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/HasOnlyReadOnly.java

@@ -0,0 +1,104 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * HasOnlyReadOnly
+ */
+
+public class HasOnlyReadOnly {
+  @SerializedName("bar")
+  private String bar = null;
+
+  @SerializedName("foo")
+  private String foo = null;
+
+   /**
+   * Get bar
+   * @return bar
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getBar() {
+    return bar;
+  }
+
+   /**
+   * Get foo
+   * @return foo
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getFoo() {
+    return foo;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/MapTest.java

@@ -0,0 +1,147 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * MapTest
+ */
+
+public class MapTest {
+  @SerializedName("map_map_of_string")
+  private Map<String, Map<String, String>> mapMapOfString = new HashMap<String, Map<String, String>>();
+
+  /**
+   * Gets or Sets inner
+   */
+  public enum InnerEnum {
+    @SerializedName("UPPER")
+    UPPER("UPPER"),
+    
+    @SerializedName("lower")
+    LOWER("lower");
+
+    private String value;
+
+    InnerEnum(String value) {
+      this.value = value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+  }
+
+  @SerializedName("map_of_enum_string")
+  private Map<String, InnerEnum> mapOfEnumString = new HashMap<String, InnerEnum>();
+
+  public MapTest mapMapOfString(Map<String, Map<String, String>> mapMapOfString) {
+    this.mapMapOfString = mapMapOfString;
+    return this;
+  }
+
+   /**
+   * Get mapMapOfString
+   * @return mapMapOfString
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Map<String, Map<String, String>> getMapMapOfString() {
+    return mapMapOfString;
+  }
+
+  public void setMapMapOfString(Map<String, Map<String, String>> mapMapOfString) {
+    this.mapMapOfString = mapMapOfString;
+  }
+
+  public MapTest mapOfEnumString(Map<String, InnerEnum> mapOfEnumString) {
+    this.mapOfEnumString = mapOfEnumString;
+    return this;
+  }
+
+   /**
+   * Get mapOfEnumString
+   * @return mapOfEnumString
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Map<String, InnerEnum> getMapOfEnumString() {
+    return mapOfEnumString;
+  }
+
+  public void setMapOfEnumString(Map<String, InnerEnum> mapOfEnumString) {
+    this.mapOfEnumString = mapOfEnumString;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(mapMapOfString, mapOfEnumString);
+  }
+
+  @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("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/MixedPropertiesAndAdditionalPropertiesClass.java

@@ -0,0 +1,150 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import io.swagger.client.model.Animal;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.joda.time.DateTime;
+
+/**
+ * MixedPropertiesAndAdditionalPropertiesClass
+ */
+
+public class MixedPropertiesAndAdditionalPropertiesClass {
+  @SerializedName("uuid")
+  private String uuid = null;
+
+  @SerializedName("dateTime")
+  private DateTime dateTime = null;
+
+  @SerializedName("map")
+  private Map<String, Animal> map = new HashMap<String, Animal>();
+
+  public MixedPropertiesAndAdditionalPropertiesClass uuid(String uuid) {
+    this.uuid = uuid;
+    return this;
+  }
+
+   /**
+   * Get uuid
+   * @return uuid
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getUuid() {
+    return uuid;
+  }
+
+  public void setUuid(String uuid) {
+    this.uuid = uuid;
+  }
+
+  public MixedPropertiesAndAdditionalPropertiesClass dateTime(DateTime dateTime) {
+    this.dateTime = dateTime;
+    return this;
+  }
+
+   /**
+   * Get dateTime
+   * @return dateTime
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public DateTime getDateTime() {
+    return dateTime;
+  }
+
+  public void setDateTime(DateTime dateTime) {
+    this.dateTime = dateTime;
+  }
+
+  public MixedPropertiesAndAdditionalPropertiesClass map(Map<String, Animal> map) {
+    this.map = map;
+    return this;
+  }
+
+   /**
+   * Get map
+   * @return map
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Map<String, Animal> getMap() {
+    return map;
+  }
+
+  public void setMap(Map<String, Animal> map) {
+    this.map = map;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Model200Response.java

@@ -0,0 +1,123 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * Model for testing model name starting with number
+ */
+@ApiModel(description = "Model for testing model name starting with number")
+
+public class Model200Response {
+  @SerializedName("name")
+  private Integer name = null;
+
+  @SerializedName("class")
+  private String PropertyClass = null;
+
+  public Model200Response name(Integer name) {
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Integer getName() {
+    return name;
+  }
+
+  public void setName(Integer name) {
+    this.name = name;
+  }
+
+  public Model200Response PropertyClass(String PropertyClass) {
+    this.PropertyClass = PropertyClass;
+    return this;
+  }
+
+   /**
+   * Get PropertyClass
+   * @return PropertyClass
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getPropertyClass() {
+    return PropertyClass;
+  }
+
+  public void setPropertyClass(String PropertyClass) {
+    this.PropertyClass = PropertyClass;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/ModelApiResponse.java

@@ -0,0 +1,145 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * ModelApiResponse
+ */
+
+public class ModelApiResponse {
+  @SerializedName("code")
+  private Integer code = null;
+
+  @SerializedName("type")
+  private String type = null;
+
+  @SerializedName("message")
+  private String message = null;
+
+  public ModelApiResponse code(Integer code) {
+    this.code = code;
+    return this;
+  }
+
+   /**
+   * Get code
+   * @return code
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Integer getCode() {
+    return code;
+  }
+
+  public void setCode(Integer code) {
+    this.code = code;
+  }
+
+  public ModelApiResponse type(String type) {
+    this.type = type;
+    return this;
+  }
+
+   /**
+   * Get type
+   * @return type
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getType() {
+    return type;
+  }
+
+  public void setType(String type) {
+    this.type = type;
+  }
+
+  public ModelApiResponse message(String message) {
+    this.message = message;
+    return this;
+  }
+
+   /**
+   * Get message
+   * @return message
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getMessage() {
+    return message;
+  }
+
+  public void setMessage(String message) {
+    this.message = message;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/ModelReturn.java

@@ -0,0 +1,100 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * Model for testing reserved words
+ */
+@ApiModel(description = "Model for testing reserved words")
+
+public class ModelReturn {
+  @SerializedName("return")
+  private Integer _return = null;
+
+  public ModelReturn _return(Integer _return) {
+    this._return = _return;
+    return this;
+  }
+
+   /**
+   * Get _return
+   * @return _return
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Integer getReturn() {
+    return _return;
+  }
+
+  public void setReturn(Integer _return) {
+    this._return = _return;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Name.java

@@ -0,0 +1,151 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * Model for testing model name same as property name
+ */
+@ApiModel(description = "Model for testing model name same as property name")
+
+public class Name {
+  @SerializedName("name")
+  private Integer name = null;
+
+  @SerializedName("snake_case")
+  private Integer snakeCase = null;
+
+  @SerializedName("property")
+  private String property = null;
+
+  @SerializedName("123Number")
+  private Integer _123Number = null;
+
+  public Name name(Integer name) {
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @ApiModelProperty(example = "null", required = true, value = "")
+  public Integer getName() {
+    return name;
+  }
+
+  public void setName(Integer name) {
+    this.name = name;
+  }
+
+   /**
+   * Get snakeCase
+   * @return snakeCase
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Integer getSnakeCase() {
+    return snakeCase;
+  }
+
+  public Name property(String property) {
+    this.property = property;
+    return this;
+  }
+
+   /**
+   * Get property
+   * @return property
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getProperty() {
+    return property;
+  }
+
+  public void setProperty(String property) {
+    this.property = property;
+  }
+
+   /**
+   * Get _123Number
+   * @return _123Number
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Integer get123Number() {
+    return _123Number;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/NumberOnly.java

@@ -0,0 +1,100 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.math.BigDecimal;
+
+/**
+ * NumberOnly
+ */
+
+public class NumberOnly {
+  @SerializedName("JustNumber")
+  private BigDecimal justNumber = null;
+
+  public NumberOnly justNumber(BigDecimal justNumber) {
+    this.justNumber = justNumber;
+    return this;
+  }
+
+   /**
+   * Get justNumber
+   * @return justNumber
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public BigDecimal getJustNumber() {
+    return justNumber;
+  }
+
+  public void setJustNumber(BigDecimal justNumber) {
+    this.justNumber = justNumber;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Order.java

@@ -0,0 +1,240 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.joda.time.DateTime;
+
+/**
+ * Order
+ */
+
+public class Order {
+  @SerializedName("id")
+  private Long id = null;
+
+  @SerializedName("petId")
+  private Long petId = null;
+
+  @SerializedName("quantity")
+  private Integer quantity = null;
+
+  @SerializedName("shipDate")
+  private DateTime shipDate = null;
+
+  /**
+   * Order Status
+   */
+  public enum StatusEnum {
+    @SerializedName("placed")
+    PLACED("placed"),
+    
+    @SerializedName("approved")
+    APPROVED("approved"),
+    
+    @SerializedName("delivered")
+    DELIVERED("delivered");
+
+    private String value;
+
+    StatusEnum(String value) {
+      this.value = value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+  }
+
+  @SerializedName("status")
+  private StatusEnum status = null;
+
+  @SerializedName("complete")
+  private Boolean complete = false;
+
+  public Order id(Long id) {
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Long getId() {
+    return id;
+  }
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  public Order petId(Long petId) {
+    this.petId = petId;
+    return this;
+  }
+
+   /**
+   * Get petId
+   * @return petId
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Long getPetId() {
+    return petId;
+  }
+
+  public void setPetId(Long petId) {
+    this.petId = petId;
+  }
+
+  public Order quantity(Integer quantity) {
+    this.quantity = quantity;
+    return this;
+  }
+
+   /**
+   * Get quantity
+   * @return quantity
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Integer getQuantity() {
+    return quantity;
+  }
+
+  public void setQuantity(Integer quantity) {
+    this.quantity = quantity;
+  }
+
+  public Order shipDate(DateTime shipDate) {
+    this.shipDate = shipDate;
+    return this;
+  }
+
+   /**
+   * Get shipDate
+   * @return shipDate
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public DateTime getShipDate() {
+    return shipDate;
+  }
+
+  public void setShipDate(DateTime shipDate) {
+    this.shipDate = shipDate;
+  }
+
+  public Order status(StatusEnum status) {
+    this.status = status;
+    return this;
+  }
+
+   /**
+   * Order Status
+   * @return status
+  **/
+  @ApiModelProperty(example = "null", value = "Order Status")
+  public StatusEnum getStatus() {
+    return status;
+  }
+
+  public void setStatus(StatusEnum status) {
+    this.status = status;
+  }
+
+  public Order complete(Boolean complete) {
+    this.complete = complete;
+    return this;
+  }
+
+   /**
+   * Get complete
+   * @return complete
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Boolean getComplete() {
+    return complete;
+  }
+
+  public void setComplete(Boolean complete) {
+    this.complete = complete;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Pet.java

@@ -0,0 +1,243 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import io.swagger.client.model.Category;
+import io.swagger.client.model.Tag;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Pet
+ */
+
+public class Pet {
+  @SerializedName("id")
+  private Long id = null;
+
+  @SerializedName("category")
+  private Category category = null;
+
+  @SerializedName("name")
+  private String name = null;
+
+  @SerializedName("photoUrls")
+  private List<String> photoUrls = new ArrayList<String>();
+
+  @SerializedName("tags")
+  private List<Tag> tags = new ArrayList<Tag>();
+
+  /**
+   * pet status in the store
+   */
+  public enum StatusEnum {
+    @SerializedName("available")
+    AVAILABLE("available"),
+    
+    @SerializedName("pending")
+    PENDING("pending"),
+    
+    @SerializedName("sold")
+    SOLD("sold");
+
+    private String value;
+
+    StatusEnum(String value) {
+      this.value = value;
+    }
+
+    @Override
+    public String toString() {
+      return String.valueOf(value);
+    }
+  }
+
+  @SerializedName("status")
+  private StatusEnum status = null;
+
+  public Pet id(Long id) {
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Long getId() {
+    return id;
+  }
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  public Pet category(Category category) {
+    this.category = category;
+    return this;
+  }
+
+   /**
+   * Get category
+   * @return category
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Category getCategory() {
+    return category;
+  }
+
+  public void setCategory(Category category) {
+    this.category = category;
+  }
+
+  public Pet name(String name) {
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @ApiModelProperty(example = "doggie", required = true, value = "")
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+  public Pet photoUrls(List<String> photoUrls) {
+    this.photoUrls = photoUrls;
+    return this;
+  }
+
+   /**
+   * Get photoUrls
+   * @return photoUrls
+  **/
+  @ApiModelProperty(example = "null", required = true, value = "")
+  public List<String> getPhotoUrls() {
+    return photoUrls;
+  }
+
+  public void setPhotoUrls(List<String> photoUrls) {
+    this.photoUrls = photoUrls;
+  }
+
+  public Pet tags(List<Tag> tags) {
+    this.tags = tags;
+    return this;
+  }
+
+   /**
+   * Get tags
+   * @return tags
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public List<Tag> getTags() {
+    return tags;
+  }
+
+  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
+  **/
+  @ApiModelProperty(example = "null", value = "pet status in the store")
+  public StatusEnum getStatus() {
+    return status;
+  }
+
+  public void setStatus(StatusEnum status) {
+    this.status = status;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/ReadOnlyFirst.java

@@ -0,0 +1,113 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * ReadOnlyFirst
+ */
+
+public class ReadOnlyFirst {
+  @SerializedName("bar")
+  private String bar = null;
+
+  @SerializedName("baz")
+  private String baz = null;
+
+   /**
+   * Get bar
+   * @return bar
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getBar() {
+    return bar;
+  }
+
+  public ReadOnlyFirst baz(String baz) {
+    this.baz = baz;
+    return this;
+  }
+
+   /**
+   * Get baz
+   * @return baz
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getBaz() {
+    return baz;
+  }
+
+  public void setBaz(String baz) {
+    this.baz = baz;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/SpecialModelName.java

@@ -0,0 +1,99 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * SpecialModelName
+ */
+
+public class SpecialModelName {
+  @SerializedName("$special[property.name]")
+  private Long specialPropertyName = null;
+
+  public SpecialModelName specialPropertyName(Long specialPropertyName) {
+    this.specialPropertyName = specialPropertyName;
+    return this;
+  }
+
+   /**
+   * Get specialPropertyName
+   * @return specialPropertyName
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Long getSpecialPropertyName() {
+    return specialPropertyName;
+  }
+
+  public void setSpecialPropertyName(Long specialPropertyName) {
+    this.specialPropertyName = specialPropertyName;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/Tag.java

@@ -0,0 +1,122 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * Tag
+ */
+
+public class Tag {
+  @SerializedName("id")
+  private Long id = null;
+
+  @SerializedName("name")
+  private String name = null;
+
+  public Tag id(Long id) {
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Long getId() {
+    return id;
+  }
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  public Tag name(String name) {
+    this.name = name;
+    return this;
+  }
+
+   /**
+   * Get name
+   * @return name
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+

samples/client/petstore/java/okhttp-gson/src/main/java/io/swagger/client/model/User.java

@@ -0,0 +1,260 @@
+/**
+ * Swagger 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: \" \\
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ *
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen.git
+ * Do not edit the class manually.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package io.swagger.client.model;
+
+import java.util.Objects;
+import com.google.gson.annotations.SerializedName;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+
+/**
+ * User
+ */
+
+public class User {
+  @SerializedName("id")
+  private Long id = null;
+
+  @SerializedName("username")
+  private String username = null;
+
+  @SerializedName("firstName")
+  private String firstName = null;
+
+  @SerializedName("lastName")
+  private String lastName = null;
+
+  @SerializedName("email")
+  private String email = null;
+
+  @SerializedName("password")
+  private String password = null;
+
+  @SerializedName("phone")
+  private String phone = null;
+
+  @SerializedName("userStatus")
+  private Integer userStatus = null;
+
+  public User id(Long id) {
+    this.id = id;
+    return this;
+  }
+
+   /**
+   * Get id
+   * @return id
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public Long getId() {
+    return id;
+  }
+
+  public void setId(Long id) {
+    this.id = id;
+  }
+
+  public User username(String username) {
+    this.username = username;
+    return this;
+  }
+
+   /**
+   * Get username
+   * @return username
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getUsername() {
+    return username;
+  }
+
+  public void setUsername(String username) {
+    this.username = username;
+  }
+
+  public User firstName(String firstName) {
+    this.firstName = firstName;
+    return this;
+  }
+
+   /**
+   * Get firstName
+   * @return firstName
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getFirstName() {
+    return firstName;
+  }
+
+  public void setFirstName(String firstName) {
+    this.firstName = firstName;
+  }
+
+  public User lastName(String lastName) {
+    this.lastName = lastName;
+    return this;
+  }
+
+   /**
+   * Get lastName
+   * @return lastName
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getLastName() {
+    return lastName;
+  }
+
+  public void setLastName(String lastName) {
+    this.lastName = lastName;
+  }
+
+  public User email(String email) {
+    this.email = email;
+    return this;
+  }
+
+   /**
+   * Get email
+   * @return email
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getEmail() {
+    return email;
+  }
+
+  public void setEmail(String email) {
+    this.email = email;
+  }
+
+  public User password(String password) {
+    this.password = password;
+    return this;
+  }
+
+   /**
+   * Get password
+   * @return password
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getPassword() {
+    return password;
+  }
+
+  public void setPassword(String password) {
+    this.password = password;
+  }
+
+  public User phone(String phone) {
+    this.phone = phone;
+    return this;
+  }
+
+   /**
+   * Get phone
+   * @return phone
+  **/
+  @ApiModelProperty(example = "null", value = "")
+  public String getPhone() {
+    return phone;
+  }
+
+  public void setPhone(String phone) {
+    this.phone = phone;
+  }
+
+  public User userStatus(Integer userStatus) {
+    this.userStatus = userStatus;
+    return this;
+  }
+
+   /**
+   * User Status
+   * @return userStatus
+  **/
+  @ApiModelProperty(example = "null", value = "User Status")
+  public Integer getUserStatus() {
+    return userStatus;
+  }
+
+  public void setUserStatus(Integer userStatus) {
+    this.userStatus = userStatus;
+  }
+
+
+  @Override
+  public boolean equals(java.lang.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(java.lang.Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+}
+