Added a new property additionalModelTypeAnnotations that allows to ad…

…d any custom annotations on to the top of generated java class model

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

@@ -5,6 +5,7 @@
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.Map;
@@ -63,6 +64,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
     public static final String DISABLE_HTML_ESCAPING = "disableHtmlEscaping";
     public static final String ERROR_ON_UNKNOWN_ENUM = "errorOnUnknownEnum";
     public static final String CHECK_DUPLICATED_MODEL_NAME = "checkDuplicatedModelName";
+    public static final String ADDITIONAL_MODEL_TYPE_ANNOTATIONS = "additionalModelTypeAnnotations";
 
     protected String dateLibrary = "threetenbp";
     protected boolean supportAsync = false;
@@ -98,6 +100,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
     protected boolean disableHtmlEscaping = false;
     private NotNullAnnotationFeatures notNullOption;
     private IgnoreUnknownJacksonFeatures ignoreUnknown;
+    protected List<String> additionalModelTypeAnnotations = new LinkedList<>();
 
     public AbstractJavaCodegen() {
         super();
@@ -198,6 +201,7 @@ public AbstractJavaCodegen() {
 
         cliOptions.add(CliOption.newBoolean(DISABLE_HTML_ESCAPING, "Disable HTML escaping of JSON strings when using gson (needed to avoid problems with byte[] fields)"));
         cliOptions.add(CliOption.newBoolean(CHECK_DUPLICATED_MODEL_NAME, "Check if there are duplicated model names (ignoring case)"));
+        cliOptions.add(CliOption.newString(ADDITIONAL_MODEL_TYPE_ANNOTATIONS, "Additional annotations for model type(class level annotations)"));
     }
 
     @Override
@@ -214,6 +218,11 @@ public void processOpts() {
         }
         additionalProperties.put(DISABLE_HTML_ESCAPING, disableHtmlEscaping);
 
+        if (additionalProperties.containsKey(ADDITIONAL_MODEL_TYPE_ANNOTATIONS)) {
+            String additionalAnnotationsList = additionalProperties.get(ADDITIONAL_MODEL_TYPE_ANNOTATIONS).toString();
+            this.setAdditionalModelTypeAnnotations(Arrays.asList(additionalAnnotationsList.split(";")));
+        }
+
         if (additionalProperties.containsKey(CodegenConstants.INVOKER_PACKAGE)) {
             this.setInvokerPackage((String) additionalProperties.get(CodegenConstants.INVOKER_PACKAGE));
         } else if (additionalProperties.containsKey(CodegenConstants.API_PACKAGE)) {
@@ -508,6 +517,18 @@ public void processOpts() {
             this.skipAliasGeneration = Boolean.TRUE;
         }
     }
+
+    @Override
+    public Map<String, Object> postProcessAllModels(Map<String, Object> objs) {
+        objs = super.postProcessAllModels(objs);
+        if (!additionalModelTypeAnnotations.isEmpty()) {
+            for (String modelName : objs.keySet()) {
+                Map<String, Object> models = (Map<String, Object>) objs.get(modelName);
+                models.put(ADDITIONAL_MODEL_TYPE_ANNOTATIONS, additionalModelTypeAnnotations);
+            }
+        }
+        return objs;
+    }
 
     private void sanitizeConfig() {
         // Sanitize any config options here. We also have to update the additionalProperties because
@@ -1450,6 +1471,10 @@ public void setDisableHtmlEscaping(boolean disabled) {
     public void setSupportAsync(boolean enabled) {
         this.supportAsync = enabled;
     }
+
+    public void setAdditionalModelTypeAnnotations(final List<String> additionalModelTypeAnnotations) {
+        this.additionalModelTypeAnnotations = additionalModelTypeAnnotations;
+    }
 
     @Override
     public String escapeQuotationMark(String input) {

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

@@ -2,7 +2,8 @@
  * {{#description}}{{.}}{{/description}}{{^description}}{{classname}}{{/description}}
  */{{#description}}
 @ApiModel(description = "{{{description}}}"){{/description}}
-{{>generatedAnnotation}}
+{{>generatedAnnotation}}{{#additionalModelTypeAnnotations}}{{{.}}}
+{{/additionalModelTypeAnnotations}}
 public class {{classname}} {{#parent}}extends {{{parent}}}{{/parent}} {{#serializableModel}}implements Serializable{{/serializableModel}} {
   {{#vars}}
     {{#isEnum}}

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

@@ -18,6 +18,8 @@
 {{#ignoreUnknownJacksonAnnotation}}
 @JsonIgnoreProperties(ignoreUnknown = true)
 {{/ignoreUnknownJacksonAnnotation}}
+{{#additionalModelTypeAnnotations}}{{{.}}}
+{{/additionalModelTypeAnnotations}}
 public class {{classname}} {{#parent}}extends {{{parent}}}{{/parent}} {{#serializableModel}}implements Serializable{{/serializableModel}} {
 {{#serializableModel}}
   private static final long serialVersionUID = 1L;

modules/swagger-codegen/src/test/java/io/swagger/codegen/DefaultGeneratorTest.java

@@ -444,6 +444,56 @@ public void testIgnoreUnknownJacksonAnnotationSpring_False() throws IOException
         assertFalse(FileUtils.readFileToString(model).contains("@JsonIgnoreProperties(ignoreUnknown = true)"));
         assertFalse(FileUtils.readFileToString(model).contains("import com.fasterxml.jackson.annotation.JsonIgnoreProperties;"));
     }
+
+    @Test
+    public void testAdditionalModelTypeAnnotations() throws IOException {
+        final File output = folder.getRoot();
+
+        CodegenConfigurator codegenConfigurator = new CodegenConfigurator();
+        codegenConfigurator.setInputSpec("src/test/resources/2_0/allOfTest.yaml");
+        codegenConfigurator.setOutputDir(output.getAbsolutePath());
+        codegenConfigurator.setLang("jaxrs");
+
+        Map<String, Object> additionalProperties = new HashMap<>();
+        additionalProperties.put("dateLibrary", "java8");
+        additionalProperties.put("apiTests", false);
+        additionalProperties.put("hideGenerationTimestamp", true);
+        additionalProperties.put("invokerPackage", "com.mycompany.generated.client");
+        additionalProperties.put("modelPackage", "com.mycompany.generated.client.model");
+        additionalProperties.put("apiPackage", "com.mycompany.generated.client.api");
+        additionalProperties.put("additionalModelTypeAnnotations",
+                "@com.fasterxml.jackson.annotation.JsonIgnoreProperties(ignoreUnknown = true);"
+                + "@com.fasterxml.jackson.annotation.JsonInclude(JsonInclude.Include.NON_NULL)");
+
+        codegenConfigurator.setAdditionalProperties(additionalProperties);
+
+        Map<String, String> importMapping = new HashMap<>();
+
+        importMapping.put("LocalDateTime", "java.time.LocalDateTime");
+        importMapping.put("LocalTime", "java.time.LocalTime");
+        importMapping.put("DayOfWeek", "java.time.DayOfWeek");
+        importMapping.put("Duration", "java.time.Duration");
+        importMapping.put("ChronoUnit", "java.time.temporal.ChronoUnit");
+        importMapping.put("Currency", "java.util.Currency");
+        importMapping.put("LocalDate", "java.time.LocalDate");
+        importMapping.put("Locale", "java.util.Locale");
+        importMapping.put("ZoneId", "java.time.ZoneId");
+
+        codegenConfigurator.setImportMappings(importMapping);
+
+        DefaultGenerator generator = new DefaultGenerator();
+        generator.setGeneratorPropertyDefault(CodegenConstants.MODEL_TESTS, "false");
+        generator.setGeneratorPropertyDefault(CodegenConstants.MODEL_DOCS, "false");
+        generator.setGeneratorPropertyDefault(CodegenConstants.API_TESTS, "false");
+        generator.setGeneratorPropertyDefault(CodegenConstants.API_DOCS, "false");
+
+        //generate
+        generator.opts(codegenConfigurator.toClientOptInput()).generate();
+        final File model = new File(output, "src/gen/java/com/mycompany/generated/client/model/ModelOne.java");
+        assertTrue(model.exists());
+        assertTrue(FileUtils.readFileToString(model).contains("@com.fasterxml.jackson.annotation.JsonIgnoreProperties(ignoreUnknown = true)"));
+        assertTrue(FileUtils.readFileToString(model).contains("@com.fasterxml.jackson.annotation.JsonInclude(JsonInclude.Include.NON_NULL)"));
+    }
 
     @Test
     public void testSecurityWithoutGlobal() throws Exception {