refs issue#6488 adding option NotNullJacksonAnnotation

Author: gracekarina

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

@@ -10,6 +10,7 @@
 import java.util.Map;
 import java.util.regex.Pattern;
 
+import io.swagger.codegen.languages.features.NotNullAnnotationFeatures;
 import org.apache.commons.lang3.BooleanUtils;
 import org.apache.commons.lang3.StringUtils;
 
@@ -43,6 +44,7 @@
 import io.swagger.models.properties.Property;
 import io.swagger.models.properties.StringProperty;
 
+import static io.swagger.codegen.languages.features.NotNullAnnotationFeatures.NOT_NULL_JACKSON_ANNOTATION;
 
 public abstract class AbstractJavaCodegen extends DefaultCodegen implements CodegenConfig {
 
@@ -88,6 +90,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
     protected String modelDocPath = "docs/";
     protected boolean supportJava6= false;
     protected boolean disableHtmlEscaping = false;
+    private NotNullAnnotationFeatures notNullOption;
 
     public AbstractJavaCodegen() {
         super();
@@ -161,7 +164,9 @@ public AbstractJavaCodegen() {
         cliOptions.add(CliOption.newBoolean(FULL_JAVA_UTIL, "whether to use fully qualified name for classes under java.util. This option only works for Java API client"));
         cliOptions.add(new CliOption("hideGenerationTimestamp", "hides the timestamp when files were generated"));
         cliOptions.add(CliOption.newBoolean(WITH_XML, "whether to include support for application/xml content type and include XML annotations in the model (works with libraries that provide support for JSON and XML)"));
-
+        if(this instanceof NotNullAnnotationFeatures){
+            cliOptions.add(CliOption.newBoolean(NOT_NULL_JACKSON_ANNOTATION, "adds @JsonInclude(JsonInclude.Include.NON_NULL) annotation to model classes"));
+        }
         CliOption dateLibrary = new CliOption(DATE_LIBRARY, "Option. Date library to use");
         Map<String, String> dateOptions = new HashMap<String, String>();
         dateOptions.put("java8", "Java 8 native JSR310 (preferred for jdk 1.8+) - note: this also sets \"" + JAVA8_MODE + "\" to true");
@@ -338,6 +343,17 @@ public void processOpts() {
             this.setFullJavaUtil(Boolean.valueOf(additionalProperties.get(FULL_JAVA_UTIL).toString()));
         }
 
+        if (this instanceof NotNullAnnotationFeatures) {
+            notNullOption = (NotNullAnnotationFeatures)this;
+            if (additionalProperties.containsKey(NOT_NULL_JACKSON_ANNOTATION)) {
+                notNullOption.setNotNullJacksonAnnotation(convertPropertyToBoolean(NOT_NULL_JACKSON_ANNOTATION));
+                writePropertyBack(NOT_NULL_JACKSON_ANNOTATION, notNullOption.isNotNullJacksonAnnotation());
+                if (notNullOption.isNotNullJacksonAnnotation()) {
+                    importMapping.put("JsonInclude", "com.fasterxml.jackson.annotation.JsonInclude");
+                }
+            }
+        }
+
         if (fullJavaUtil) {
             javaUtilPrefix = "java.util.";
         }
@@ -907,6 +923,16 @@ public CodegenModel fromModel(String name, Model model, Map<String, Model> allDe
             final CodegenModel parentCodegenModel = super.fromModel(codegenModel.parent, parentModel);
             codegenModel = AbstractJavaCodegen.reconcileInlineEnums(codegenModel, parentCodegenModel);
         }
+        if (this instanceof NotNullAnnotationFeatures) {
+            if (this instanceof NotNullAnnotationFeatures) {
+                notNullOption = (NotNullAnnotationFeatures)this;
+                if (additionalProperties.containsKey(NOT_NULL_JACKSON_ANNOTATION)) {
+                    if (notNullOption.isNotNullJacksonAnnotation()) {
+                        codegenModel.imports.add("JsonInclude");
+                    }
+                }
+            }
+        }
         return codegenModel;
     }
 

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

@@ -6,6 +6,7 @@
 import io.swagger.codegen.*;
 import io.swagger.codegen.languages.features.BeanValidationFeatures;
 import io.swagger.codegen.languages.features.GzipFeatures;
+import io.swagger.codegen.languages.features.NotNullAnnotationFeatures;
 import io.swagger.codegen.languages.features.PerformBeanValidationFeatures;
 
 import org.apache.commons.lang3.BooleanUtils;
@@ -19,7 +20,7 @@
 
 public class JavaClientCodegen extends AbstractJavaCodegen
         implements BeanValidationFeatures, PerformBeanValidationFeatures,
-                   GzipFeatures
+                   GzipFeatures, NotNullAnnotationFeatures
 {
     static final String MEDIA_TYPE = "mediaType";
 
@@ -52,7 +53,7 @@ public class JavaClientCodegen extends AbstractJavaCodegen
     protected boolean performBeanValidation = false;
     protected boolean useGzipFeature = false;
     protected boolean useRuntimeException = false;
-
+    private boolean notNullJacksonAnnotation;
 
     public JavaClientCodegen() {
         super();
@@ -611,4 +612,13 @@ static boolean isJsonVendorMimeType(String mime) {
         return mime != null && JSON_VENDOR_MIME_PATTERN.matcher(mime).matches();
     }
 
+    @Override
+    public void setNotNullJacksonAnnotation(boolean notNullJacksonAnnotation) {
+        this.notNullJacksonAnnotation = notNullJacksonAnnotation;
+    }
+
+    @Override
+    public boolean isNotNullJacksonAnnotation() {
+        return notNullJacksonAnnotation;
+    }
 }

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

@@ -4,6 +4,7 @@
 import com.samskivert.mustache.Template;
 import io.swagger.codegen.*;
 import io.swagger.codegen.languages.features.BeanValidationFeatures;
+import io.swagger.codegen.languages.features.NotNullAnnotationFeatures;
 import io.swagger.codegen.languages.features.OptionalFeatures;
 import io.swagger.models.Operation;
 import io.swagger.models.Path;
@@ -17,7 +18,7 @@
 
 
 public class SpringCodegen extends AbstractJavaCodegen
-        implements BeanValidationFeatures, OptionalFeatures {
+        implements BeanValidationFeatures, OptionalFeatures, NotNullAnnotationFeatures {
     public static final String DEFAULT_LIBRARY = "spring-boot";
     public static final String TITLE = "title";
     public static final String CONFIG_PACKAGE = "configPackage";
@@ -53,6 +54,7 @@ public class SpringCodegen extends AbstractJavaCodegen
     protected boolean useOptional = false;
     protected boolean openFeign = false;
     protected boolean defaultInterfaces = true;
+    private boolean notNullJacksonAnnotation;
 
     public SpringCodegen() {
         super();
@@ -499,6 +501,16 @@ public void setReturnContainer(final String returnContainer) {
         return objs;
     }
 
+    @Override
+    public void setNotNullJacksonAnnotation(boolean notNullJacksonAnnotation) {
+        this.notNullJacksonAnnotation = notNullJacksonAnnotation;
+    }
+
+    @Override
+    public boolean isNotNullJacksonAnnotation() {
+        return notNullJacksonAnnotation;
+    }
+
     private interface DataTypeAssigner {
         void setReturnType(String returnType);
         void setReturnContainer(String returnContainer);

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/features/NotNullAnnotationFeatures.java

@@ -0,0 +1,10 @@
+package io.swagger.codegen.languages.features;
+
+public interface NotNullAnnotationFeatures {
+    // Language supports generating not Null Jackson Annotation
+    String NOT_NULL_JACKSON_ANNOTATION = "notNullJacksonAnnotation";
+
+    void setNotNullJacksonAnnotation(boolean notNullJacksonAnnotation);
+
+    boolean isNotNullJacksonAnnotation();
+}

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

@@ -236,6 +236,13 @@
                 <scope>provided</scope>
             </dependency>
         {{/useBeanValidation}}
+        {{#notNullJacksonAnnotation}}
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-annotations</artifactId>
+                <version>2.10.1</version>
+            </dependency>
+        {{/notNullJacksonAnnotation}}
         {{#performBeanValidation}}
             <!-- Bean Validation Impl. used to perform BeanValidation -->
             <dependency>

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

@@ -3,6 +3,9 @@
  */{{#description}}
 @ApiModel(description = "{{{description}}}"){{/description}}
 {{>generatedAnnotation}}{{#discriminator}}{{>typeInfoAnnotation}}{{/discriminator}}{{>xmlAnnotation}}
+
+{{#notNullJacksonAnnotation}}@JsonInclude(JsonInclude.Include.NON_NULL){{/notNullJacksonAnnotation}}
+
 public class {{classname}} {{#parent}}extends {{{parent}}} {{/parent}}{{#parcelableModel}}implements Parcelable {{#serializableModel}}, Serializable {{/serializableModel}}{{/parcelableModel}}{{^parcelableModel}}{{#serializableModel}}implements Serializable {{/serializableModel}}{{/parcelableModel}}{
 {{#serializableModel}}
   private static final long serialVersionUID = 1L;

modules/swagger-codegen/src/main/resources/JavaSpring/libraries/spring-boot/pom.mustache

@@ -95,6 +95,13 @@
             <artifactId>validation-api</artifactId>
         </dependency>
 {{/useBeanValidation}}
+        {{#notNullJacksonAnnotation}}
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-annotations</artifactId>
+                <version>2.10.1</version>
+            </dependency>
+        {{/notNullJacksonAnnotation}}
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

modules/swagger-codegen/src/main/resources/JavaSpring/libraries/spring-cloud/pom.mustache

@@ -93,6 +93,13 @@
         <scope>provided</scope>
     </dependency>
 {{/useBeanValidation}}
+        {{#notNullJacksonAnnotation}}
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-annotations</artifactId>
+                <version>2.10.1</version>
+            </dependency>
+        {{/notNullJacksonAnnotation}}
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>

modules/swagger-codegen/src/main/resources/JavaSpring/libraries/spring-mvc/pom.mustache

@@ -161,6 +161,13 @@
         <scope>provided</scope>
     </dependency>
 {{/useBeanValidation}}
+        {{#notNullJacksonAnnotation}}
+            <dependency>
+                <groupId>com.fasterxml.jackson.core</groupId>
+                <artifactId>jackson-annotations</artifactId>
+                <version>${jackson-version}</version>
+            </dependency>
+        {{/notNullJacksonAnnotation}}
     <dependency>
         <groupId>org.testng</groupId>
         <artifactId>testng</artifactId>

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

@@ -4,6 +4,9 @@
 @ApiModel(description = "{{{description}}}"){{/description}}
 {{#useBeanValidation}}@Validated{{/useBeanValidation}}
 {{>generatedAnnotation}}{{#discriminator}}{{>typeInfoAnnotation}}{{/discriminator}}{{>xmlAnnotation}}
+
+{{#notNullJacksonAnnotation}}@JsonInclude(JsonInclude.Include.NON_NULL){{/notNullJacksonAnnotation}}
+
 public class {{classname}} {{#parent}}extends {{{parent}}}{{/parent}} {{#serializableModel}}implements Serializable{{/serializableModel}} {
 {{#serializableModel}}
   private static final long serialVersionUID = 1L;