Allow generation of Jersey2 clients with JSR310 classes

If the -DdateLibrary=java8 option is set on the command line then
jersey2 client code will be generated using JSR310 classes rather than
Joda time.  Because JSR310 requires java8 the java target version is
also changed in the build files.

modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/JSON.mustache

@@ -2,7 +2,12 @@ package {{invokerPackage}};
 
 import com.fasterxml.jackson.annotation.*;
 import com.fasterxml.jackson.databind.*;
+{{#java8}}
+import com.fasterxml.jackson.datatype.jsr310.*;
+{{/java8}}
+{{^java8}}
 import com.fasterxml.jackson.datatype.joda.*;
+{{/java8}}
 
 import java.text.DateFormat;
 
@@ -19,7 +24,12 @@ public class JSON implements ContextResolver<ObjectMapper> {
     mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
     mapper.enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING);
     mapper.enable(DeserializationFeature.READ_ENUMS_USING_TO_STRING);
+    {{#java8}}
+    mapper.registerModule(new JavaTimeModule());
+    {{/java8}}
+    {{^java8}}
     mapper.registerModule(new JodaModule());
+    {{/java8}}
   }
 
   /**

modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/build.gradle.mustache

@@ -32,8 +32,14 @@ if(hasProperty('target') && target == 'android') {
             targetSdkVersion 23
         }
         compileOptions {
+            {{#java8}}
+            sourceCompatibility JavaVersion.VERSION_1_8
+            targetCompatibility JavaVersion.VERSION_1_8
+            {{/java8}}
+            {{^java8}}
             sourceCompatibility JavaVersion.VERSION_1_7
             targetCompatibility JavaVersion.VERSION_1_7
+            {{/java8}}
         }
 
         // Rename the aar correctly
@@ -78,8 +84,14 @@ if(hasProperty('target') && target == 'android') {
     apply plugin: 'java'
     apply plugin: 'maven'
 
+    {{#java8}}
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+    {{/java8}}
+    {{^java8}}
     sourceCompatibility = JavaVersion.VERSION_1_7
     targetCompatibility = JavaVersion.VERSION_1_7
+    {{/java8}}
 
     install {
         repositories.mavenInstaller {
@@ -97,7 +109,9 @@ ext {
     swagger_annotations_version = "1.5.8"
     jackson_version = "2.7.0"
     jersey_version = "2.22.2"
+    {{^java8}}
     jodatime_version = "2.9.3"
+    {{/java8}}
     junit_version = "4.12"
 }
 
@@ -109,8 +123,14 @@ dependencies {
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-databind:$jackson_version"
+    {{#java8}}
+    compile "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jackson_version"
+    {{/java8}}
+    {{^java8}}
     compile "com.fasterxml.jackson.datatype:jackson-datatype-joda:2.1.5"
     compile "joda-time:joda-time:$jodatime_version"
+    {{/java8}}
+    
     compile "com.brsanthu:migbase64:2.2"
     testCompile "junit:junit:$junit_version"
 }

modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/build.sbt.mustache

@@ -16,8 +16,13 @@ lazy val root = (project in file(".")).
       "com.fasterxml.jackson.core" % "jackson-core" % "2.7.0",
       "com.fasterxml.jackson.core" % "jackson-annotations" % "2.7.0",
       "com.fasterxml.jackson.core" % "jackson-databind" % "2.7.0",
+      {{#java8}}
+	  "com.fasterxml.jackson.datatype" % "jackson-datatype-jsr310" % "2.7.0",
+	  {{/java8}}
+      {{^java8}}
       "com.fasterxml.jackson.datatype" % "jackson-datatype-joda" % "2.1.5",
       "joda-time" % "joda-time" % "2.9.3",
+      {{/java8}}
       "com.brsanthu" % "migbase64" % "2.2",
       "junit" % "junit" % "4.12" % "test",
       "com.novocode" % "junit-interface" % "0.10" % "test"

modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/pom.mustache

@@ -100,8 +100,14 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>2.3.2</version>
         <configuration>
+          {{#java8}}
+          <source>1.8</source>
+          <target>1.8</target>
+          {{/java8}}
+          {{^java8}}
           <source>1.7</source>
           <target>1.7</target>
+          {{/java8}}
         </configuration>
       </plugin>
       <!-- For testing build.gradle -->
@@ -167,6 +173,14 @@
       <artifactId>jackson-databind</artifactId>
       <version>${jackson-version}</version>
     </dependency>
+    {{#java8}}
+    <dependency>
+      <groupId>com.fasterxml.jackson.datatype</groupId>
+      <artifactId>jackson-datatype-jsr310</artifactId>
+      <version>${jackson-version}</version>
+    </dependency>
+    {{/java8}}
+    {{^java8}}
     <dependency>
       <groupId>com.fasterxml.jackson.datatype</groupId>
       <artifactId>jackson-datatype-joda</artifactId>
@@ -177,6 +191,7 @@
       <artifactId>joda-time</artifactId>
       <version>${jodatime-version}</version>
     </dependency>
+    {{/java8}}
 
     <!-- Base64 encoding that works in both JVM and Android -->
     <dependency>
@@ -197,7 +212,9 @@
     <swagger-core-version>1.5.8</swagger-core-version>
     <jersey-version>2.22.2</jersey-version>
     <jackson-version>2.7.0</jackson-version>
+    {{^java8}}
     <jodatime-version>2.9.3</jodatime-version>
+    {{/java8}}
     <maven-plugin-version>1.0.0</maven-plugin-version>
     <junit-version>4.12</junit-version>
   </properties>