Add build files for Gradle and SBT

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaClientCodegen.java

@@ -163,9 +163,13 @@ public class JavaClientCodegen extends DefaultCodegen implements CodegenConfig {
 
         // library-specific files
         if ("okhttp-gson".equals(getLibrary())) {
-            // the "okhttp-gson" library template requires "ApiCallback.mustache"
-            // and does not require "TypeRef.mustache"
+            // the "okhttp-gson" library template requires "ApiCallback.mustache" for async call
             supportingFiles.add(new SupportingFile("ApiCallback.mustache", invokerFolder, "ApiCallback.java"));
+            // "build.gradle" is for development with Gradle
+            supportingFiles.add(new SupportingFile("build.gradle.mustache", "", "build.gradle"));
+            // "build.sbt" is for development with SBT
+            supportingFiles.add(new SupportingFile("build.sbt.mustache", "", "build.sbt"));
+            // and does not require "TypeRef.mustache"
         } else {
             supportingFiles.add(new SupportingFile("TypeRef.mustache", invokerFolder, "TypeRef.java"));
         }

modules/swagger-codegen/src/main/resources/Java/libraries/okhttp-gson/build.gradle.mustache

@@ -0,0 +1,28 @@
+apply plugin: 'java'
+apply plugin: 'maven'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile 'io.swagger:swagger-annotations:1.5.0'
+    compile 'com.squareup.okhttp:okhttp:2.4.0'
+    compile 'com.google.code.gson:gson:2.3.1'
+    compile 'com.brsanthu:migbase64:2.2'
+    testCompile 'junit:junit:4.8.1'
+}
+
+group = '{{groupId}}'
+version = '{{artifactVersion}}'
+
+install {
+    repositories.mavenInstaller {
+        pom.artifactId = '{{artifactId}}'
+    }
+}
+
+task execute(type:JavaExec) {
+   main = System.getProperty('mainClass')
+   classpath = sourceSets.main.runtimeClasspath
+}

modules/swagger-codegen/src/main/resources/Java/libraries/okhttp-gson/build.sbt.mustache

@@ -0,0 +1,18 @@
+lazy val root = (project in file(".")).
+  settings(
+    organization := "{{groupId}}",
+    name := "{{artifactId}}",
+    version := "{{artifactVersion}}",
+    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" % "1.5.0",
+      "com.squareup.okhttp" % "okhttp" % "2.4.0",
+      "com.google.code.gson" % "gson" % "2.3.1",
+      "com.brsanthu" % "migbase64" % "2.2",
+      "junit" % "junit" % "4.8.1" % "test"
+    )
+  )

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

@@ -0,0 +1,28 @@
+apply plugin: 'java'
+apply plugin: 'maven'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    compile 'io.swagger:swagger-annotations:1.5.0'
+    compile 'com.squareup.okhttp:okhttp:2.4.0'
+    compile 'com.google.code.gson:gson:2.3.1'
+    compile 'com.brsanthu:migbase64:2.2'
+    testCompile 'junit:junit:4.8.1'
+}
+
+group = 'io.swagger'
+version = '1.0.0'
+
+install {
+    repositories.mavenInstaller {
+        pom.artifactId = 'swagger-petstore-okhttp-gson'
+    }
+}
+
+task execute(type:JavaExec) {
+   main = System.getProperty('mainClass')
+   classpath = sourceSets.main.runtimeClasspath
+}

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

@@ -0,0 +1,18 @@
+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" % "1.5.0",
+      "com.squareup.okhttp" % "okhttp" % "2.4.0",
+      "com.google.code.gson" % "gson" % "2.3.1",
+      "com.brsanthu" % "migbase64" % "2.2",
+      "junit" % "junit" % "4.8.1" % "test"
+    )
+  )