[Java] add nullable annotation to pojo template for non-required fields

modules/openapi-generator/src/main/resources/Java/build.gradle.mustache

@@ -145,6 +145,7 @@ ext {
 
 dependencies {
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile "com.sun.jersey:jersey-client:$jersey_version"
     compile "com.sun.jersey.contribs:jersey-multipart:$jersey_version"
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"

modules/openapi-generator/src/main/resources/Java/libraries/feign/build.gradle.mustache

@@ -133,6 +133,7 @@ ext {
 
 dependencies {
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile "io.github.openfeign:feign-core:$feign_version"
     compile "io.github.openfeign:feign-jackson:$feign_version"
     compile "io.github.openfeign:feign-slf4j:$feign_version"

modules/openapi-generator/src/main/resources/Java/libraries/feign/pom.mustache

@@ -199,6 +199,13 @@
             <version>${swagger-annotations-version}</version>
         </dependency>
 
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
+
         <!-- HTTP client: Netflix Feign -->
         <dependency>
             <groupId>io.github.openfeign</groupId>

modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/build.gradle.mustache

@@ -133,6 +133,7 @@ ext {
 
 dependencies {
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile "com.google.api-client:google-api-client:${google_api_client_version}"
     compile "org.glassfish.jersey.core:jersey-common:${jersey_common_version}"
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"

modules/openapi-generator/src/main/resources/Java/libraries/google-api-client/pom.mustache

@@ -219,6 +219,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-annotations-version}</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <!-- HTTP client: google-api-client -->
         <dependency>
             <groupId>com.google.api-client</groupId>

modules/openapi-generator/src/main/resources/Java/libraries/jersey2/build.gradle.mustache

@@ -137,6 +137,7 @@ ext {
 
 dependencies {
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile "org.glassfish.jersey.core:jersey-client:$jersey_version"
     compile "org.glassfish.jersey.media:jersey-media-multipart:$jersey_version"
     compile "org.glassfish.jersey.media:jersey-media-json-jackson:$jersey_version"

modules/openapi-generator/src/main/resources/Java/libraries/jersey2/pom.mustache

@@ -229,6 +229,13 @@
             <version>${swagger-annotations-version}</version>
         </dependency>
 
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
+
         <!-- HTTP client: jersey-client -->
         <dependency>
             <groupId>org.glassfish.jersey.core</groupId>

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/build.gradle.mustache

@@ -127,6 +127,7 @@ if(hasProperty('target') && target == 'android') {
 
 dependencies {
     compile 'io.swagger:swagger-annotations:1.5.22'
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile 'com.squareup.okhttp3:okhttp:3.14.2'
     compile 'com.squareup.okhttp3:logging-interceptor:3.14.2'
     compile 'com.google.code.gson:gson:2.8.5'

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/pom.mustache

@@ -207,6 +207,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-core-version}</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>okhttp</artifactId>

modules/openapi-generator/src/main/resources/Java/libraries/rest-assured/build.gradle.mustache

@@ -111,6 +111,7 @@ ext {
 
 dependencies {
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile "io.rest-assured:scala-support:$rest_assured_version"
     compile "io.gsonfire:gson-fire:$gson_fire_version"
 {{#joda}}

modules/openapi-generator/src/main/resources/Java/libraries/rest-assured/pom.mustache

@@ -206,6 +206,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-annotations-version}</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <dependency>
             <groupId>io.rest-assured</groupId>
             <artifactId>rest-assured</artifactId>

modules/openapi-generator/src/main/resources/Java/libraries/resteasy/build.gradle.mustache

@@ -135,6 +135,7 @@ ext {
 
 dependencies {
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile "org.jboss.resteasy:resteasy-client:$resteasy_version"
     compile "org.jboss.resteasy:resteasy-multipart-provider:$resteasy_version"
     compile "org.jboss.resteasy:resteasy-jackson2-provider:$resteasy_version"

modules/openapi-generator/src/main/resources/Java/libraries/resteasy/pom.mustache

@@ -179,6 +179,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-annotations-version}</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <!-- HTTP client: jersey-client -->
         <dependency>
             <groupId>org.jboss.resteasy</groupId>

modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/build.gradle.mustache

@@ -132,6 +132,7 @@ ext {
 
 dependencies {
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile "org.springframework:spring-web:$spring_web_version"
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"
     compile "com.fasterxml.jackson.core:jackson-annotations:$jackson_version"

modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/pom.mustache

@@ -219,6 +219,13 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-annotations-version}</version>
         </dependency>
+
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
 
         <!-- HTTP client: Spring RestTemplate -->
         <dependency>

modules/openapi-generator/src/main/resources/Java/libraries/retrofit/build.gradle.mustache

@@ -120,6 +120,7 @@ ext {
 
 dependencies {
     compile "com.squareup.okhttp:okhttp:$okhttp_version"
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile "com.squareup.retrofit:retrofit:$retrofit_version"
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
     compile "org.apache.oltu.oauth2:org.apache.oltu.oauth2.client:$oltu_version"

modules/openapi-generator/src/main/resources/Java/libraries/retrofit/pom.mustache

@@ -219,6 +219,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-annotations-version}</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <dependency>
             <groupId>com.squareup.retrofit</groupId>
             <artifactId>retrofit</artifactId>

modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/build.gradle.mustache

@@ -166,6 +166,7 @@ dependencies {
     compile "io.reactivex.rxjava2:rxjava:$rx_java_version"
     {{/useRxJava2}}
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile ("org.apache.oltu.oauth2:org.apache.oltu.oauth2.client:$oltu_version"){
         exclude group:'org.apache.oltu.oauth2' , module: 'org.apache.oltu.oauth2.common'
     }

modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/pom.mustache

@@ -198,6 +198,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-annotations-version}</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <dependency>
             <groupId>com.squareup.retrofit2</groupId>
             <artifactId>converter-gson</artifactId>

modules/openapi-generator/src/main/resources/Java/libraries/vertx/build.gradle.mustache

@@ -36,6 +36,7 @@ ext {
 
 dependencies {
     compile "io.swagger:swagger-annotations:$swagger_annotations_version"
+    compile "com.google.code.findbugs:jsr305:3.0.2"
     compile "io.vertx:vertx-web-client:$vertx_version"
     compile "io.vertx:vertx-rx-java:$vertx_version"
     compile "com.fasterxml.jackson.core:jackson-core:$jackson_version"

modules/openapi-generator/src/main/resources/Java/libraries/vertx/pom.mustache

@@ -208,6 +208,13 @@
             <version>${swagger-annotations-version}</version>
         </dependency>
 
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
+
         <!-- Vertx -->
         <dependency>
             <groupId>io.vertx</groupId>

modules/openapi-generator/src/main/resources/Java/libraries/webclient/pom.mustache

@@ -72,6 +72,13 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-annotations-version}</version>
         </dependency>
+
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
 
         <dependency>
             <groupId>io.projectreactor</groupId>

modules/openapi-generator/src/main/resources/Java/pojo.mustache

@@ -129,6 +129,7 @@ public class {{classname}} {{#parent}}extends {{{parent}}} {{/parent}}{{#parcela
   {{/maximum}}
    * @return {{name}}
   **/
+{{^required}}  @javax.annotation.Nullable {{/required}}
 {{#useBeanValidation}}{{>beanValidation}}{{/useBeanValidation}}  @ApiModelProperty({{#example}}example = "{{{example}}}", {{/example}}{{#required}}required = {{required}}, {{/required}}value = "{{{description}}}")
 {{#vendorExtensions.extraAnnotation}}
   {{{vendorExtensions.extraAnnotation}}}

modules/openapi-generator/src/main/resources/Java/pom.mustache

@@ -220,6 +220,14 @@
             <version>${swagger-annotations-version}</version>
         </dependency>
 
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
+
+
         <!-- HTTP client: jersey-client -->
         <dependency>
             <groupId>com.sun.jersey</groupId>

modules/openapi-generator/src/main/resources/JavaJaxRS/cxf-cdi/pom.mustache

@@ -77,6 +77,13 @@
             <version>[1.5.3,1.5.16]</version>
         </dependency>
 
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
+
 {{#useBeanValidation}}
        <!-- Bean Validation API support -->
        <dependency>

modules/openapi-generator/src/main/resources/JavaJaxRS/resteasy/pom.mustache

@@ -71,6 +71,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-core-version}</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-log4j12</artifactId>

modules/openapi-generator/src/main/resources/JavaJaxRS/spec/pom.mustache

@@ -88,6 +88,12 @@
       <version>1.5.3</version>
     </dependency>
     {{/useSwaggerAnnotations}}
+    <!-- @Nullable annotation -->
+    <dependency>
+        <groupId>com.google.code.findbugs</groupId>
+        <artifactId>jsr305</artifactId>
+        <version>3.0.2</version>
+    </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>

modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-boot/pom.mustache

@@ -111,6 +111,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>1.5.14</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.dataformat</groupId>
             <artifactId>jackson-dataformat-yaml</artifactId>

modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-cloud/pom.mustache

@@ -47,6 +47,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-core-version}</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-openfeign</artifactId>

modules/openapi-generator/src/main/resources/JavaSpring/libraries/spring-mvc/pom.mustache

@@ -177,6 +177,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>1.5.14</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.dataformat</groupId>
             <artifactId>jackson-dataformat-yaml</artifactId>

modules/openapi-generator/src/main/resources/android/libraries/volley/pom.mustache

@@ -11,6 +11,12 @@
       <artifactId>swagger-annotations</artifactId>
       <version>${swagger-annotations-version}</version>
     </dependency>
+    <!-- @Nullable annotation -->
+    <dependency>
+        <groupId>com.google.code.findbugs</groupId>
+        <artifactId>jsr305</artifactId>
+        <version>3.0.2</version>
+    </dependency>
     <dependency>
       <groupId>org.apache.httpcomponents</groupId>
       <artifactId>httpcore</artifactId>

modules/openapi-generator/src/main/resources/android/pom.mustache

@@ -131,6 +131,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${swagger-core-version}</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>

modules/openapi-generator/src/main/resources/java-undertow-server/pom.mustache

@@ -108,6 +108,12 @@
             <artifactId>swagger-annotations</artifactId>
             <version>${version.swagger}</version>
         </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
 
         <!-- Test Dependencies -->
         <dependency>

modules/openapi-generator/src/main/resources/kotlin-spring/libraries/spring-boot/pom.mustache

@@ -105,6 +105,12 @@
             <version>1.5.21</version>
         </dependency>
         {{/swaggerAnnotations}}
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.dataformat</groupId>
             <artifactId>jackson-dataformat-yaml</artifactId>