refactored to create separate serviceinterface, implementation and corresponding factory. JaxRs class uses the factory to find the implementation. Also fixed possibility for a code generator to control which API files that should be overwritten

modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/CodegenConfig.java

@@ -56,4 +56,8 @@ public interface CodegenConfig {
   Map<String, Object> postProcessModels(Map<String, Object> objs);
   Map<String, Object> postProcessOperations(Map<String, Object> objs);
   Map<String, Object> postProcessSupportingFileData(Map<String, Object> objs);
+
+  String apiFilename(String templateName, String tag);
+
+  boolean shouldOverwrite(String filename);
 }

modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/DefaultCodegen.java

@@ -1169,4 +1169,13 @@ public class DefaultCodegen {
   }
 
 
+  public String apiFilename(String templateName, String tag)
+  {
+    String suffix = apiTemplateFiles().get(templateName);
+    return apiFileFolder() + File.separator + toApiFilename(tag) + suffix;
+  }
+
+  public boolean shouldOverwrite( String filename ){
+    return true;
+  }
 }

modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/DefaultGenerator.java

@@ -175,11 +175,11 @@ public class DefaultGenerator extends AbstractGenerator implements Generator {
         }
 
         for (String templateName : config.apiTemplateFiles().keySet()) {
-          String suffix = config.apiTemplateFiles().get(templateName);
-          String filename = config.apiFileFolder() +
-                  File.separator +
-                  config.toApiFilename(tag) +
-                  suffix;
+
+          String filename = config.apiFilename( templateName, tag );
+          if( new File( filename ).exists() && !config.shouldOverwrite( filename )){
+            continue;
+          }
 
           String template = readTemplate(config.templateDir() + File.separator + templateName);
           Template tmpl = Mustache.compiler()

modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/languages/JavaClientCodegen.java

@@ -130,7 +130,6 @@ public class JavaClientCodegen extends DefaultCodegen implements CodegenConfig {
     return toModelName(name);
   }
 
-
   @Override
   public String getTypeDeclaration(Property p) {
     if(p instanceof ArrayProperty) {

modules/swagger-codegen/src/main/java/com/wordnik/swagger/codegen/languages/JaxRSServerCodegen.java

@@ -31,9 +31,14 @@ public class JaxRSServerCodegen extends JavaClientCodegen implements CodegenConf
 
   public JaxRSServerCodegen() {
     super();
+
     outputFolder = "generated-code/javaJaxRS";
     modelTemplateFiles.put("model.mustache", ".java");
     apiTemplateFiles.put("api.mustache", ".java");
+    apiTemplateFiles.put("apiService.mustache", ".java");
+    apiTemplateFiles.put("apiServiceImpl.mustache", ".java");
+    apiTemplateFiles.put("apiServiceFactory.mustache", ".java");
+
     templateDir = "JavaJaxRS";
     apiPackage = "io.swagger.api";
     modelPackage = "io.swagger.model";
@@ -146,4 +151,29 @@ public class JaxRSServerCodegen extends JavaClientCodegen implements CodegenConf
     }
     return objs;
   }
+
+  @Override
+  public String apiFilename(String templateName, String tag) {
+
+    String result = super.apiFilename(templateName, tag);
+
+    if( templateName.endsWith( "Impl.mustache")){
+       int ix = result.lastIndexOf( '/' );
+       result = result.substring( 0, ix ) + "/impl" + result.substring( ix, result.length()-5 ) + "ServiceImpl.java";
+    } else if( templateName.endsWith( "Service.mustache")){
+      int ix = result.lastIndexOf( '.' );
+      result = result.substring( 0, ix ) + "Service.java";
+    }
+    else if( templateName.endsWith( "Factory.mustache")){
+      int ix = result.lastIndexOf( '/' );
+      result = result.substring( 0, ix ) + "/factories" + result.substring( ix, result.length()-5 ) + "ServiceFactory.java";
+    }
+
+    return result;
+  }
+
+  public boolean shouldOverwrite( String filename ){
+
+    return !filename.endsWith( "ServiceImpl.java") && !filename.endsWith( "ServiceFactory.java");
+  }
 }

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

@@ -1,6 +1,8 @@
 package {{package}};
 
 import {{modelPackage}}.*;
+import {{package}}.{{classname}}Service;
+import {{package}}.factories.{{classname}}ServiceFactory;
 
 import com.wordnik.swagger.annotations.ApiParam;
 
@@ -24,7 +26,10 @@ import javax.ws.rs.*;
 @com.wordnik.swagger.annotations.Api(value = "/{{baseName}}", description = "the {{baseName}} API")
 {{#operations}}
 public class {{classname}}  {
-  {{#operation}}
+
+   private final {{classname}}Service delegate = {{classname}}ServiceFactory.get{{classname}}();
+
+{{#operation}}
     @{{httpMethod}}
     {{#subresourceOperation}}@Path("{{path}}"){{/subresourceOperation}}
     {{#hasConsumes}}@Consumes({ {{#consumes}}"{{mediaType}}"{{#hasMore}}, {{/hasMore}}{{/consumes}} }){{/hasConsumes}}
@@ -38,9 +43,9 @@ public class {{classname}} {
     {{/hasMore}}{{/allParams}})
     throws NotFoundException {
     // do some magic!
-      return Response.ok().entity(new ApiResponseMessage(ApiResponseMessage.OK, "magic!")).build();
+    return delegate.{{nickname}}({{#allParams}}{{#isFile}}fileDetail{{/isFile}}{{^isFile}}{{paramName}}{{/isFile}}{{#hasMore}},{{/hasMore}}{{/allParams}});
     }
-
-  {{/operation}}
+{{/operation}}
 }
 {{/operations}}
+

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

@@ -0,0 +1,28 @@
+package {{package}};
+
+import {{package}}.*;
+import {{modelPackage}}.*;
+
+import com.sun.jersey.multipart.FormDataParam;
+
+{{#imports}}import {{import}};
+{{/imports}}
+
+import java.util.List;
+import {{package}}.NotFoundException;
+
+import java.io.InputStream;
+
+import com.sun.jersey.core.header.FormDataContentDisposition;
+import com.sun.jersey.multipart.FormDataParam;
+
+import javax.ws.rs.core.Response;
+
+{{#operations}}
+public interface {{classname}}Service {
+  {{#operation}}
+      public Response {{nickname}}({{#allParams}}{{>serviceQueryParams}}{{>servicePathParams}}{{>serviceHeaderParams}}{{>serviceBodyParams}}{{>serviceFormParams}}{{#hasMore}},{{/hasMore}}{{/allParams}})
+      throws NotFoundException;
+  {{/operation}}
+}
+{{/operations}}

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

@@ -0,0 +1,14 @@
+package {{package}}.factories;
+
+import {{package}}.{{classname}}Service;
+import {{package}}.impl.{{classname}}ServiceImpl;
+
+public class {{classname}}ServiceFactory {
+
+   private final static {{classname}}Service service = new {{classname}}ServiceImpl();
+
+   public static {{classname}}Service get{{classname}}()
+   {
+      return service;
+   }
+}

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

@@ -0,0 +1,31 @@
+package {{package}}.impl;
+
+import {{package}}.*;
+import {{modelPackage}}.*;
+
+import com.sun.jersey.multipart.FormDataParam;
+
+{{#imports}}import {{import}};
+{{/imports}}
+
+import java.util.List;
+import {{package}}.NotFoundException;
+
+import java.io.InputStream;
+
+import com.sun.jersey.core.header.FormDataContentDisposition;
+import com.sun.jersey.multipart.FormDataParam;
+
+import javax.ws.rs.core.Response;
+
+{{#operations}}
+public class {{classname}}ServiceImpl implements {{classname}}Service {
+  {{#operation}}
+      public Response {{nickname}}({{#allParams}}{{>serviceQueryParams}}{{>servicePathParams}}{{>serviceHeaderParams}}{{>serviceBodyParams}}{{>serviceFormParams}}{{#hasMore}},{{/hasMore}}{{/allParams}})
+      throws NotFoundException {
+      // do some magic!
+      return Response.ok().entity(new ApiResponseMessage(ApiResponseMessage.OK, "magic!")).build();
+  }
+  {{/operation}}
+}
+{{/operations}}

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

@@ -129,7 +129,7 @@
     </repository>
   </repositories>
   <properties>
-    <swagger-core-version>2.1.1-M2-SNAPSHOT</swagger-core-version>
+    <swagger-core-version>1.5.2-M2-SNAPSHOT</swagger-core-version>
     <jetty-version>9.2.9.v20150224</jetty-version>
     <jersey-version>1.13</jersey-version>
     <slf4j-version>1.6.3</slf4j-version>

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

@@ -0,0 +1 @@
+{{#isBodyParam}}{{{dataType}}} {{paramName}}{{/isBodyParam}}

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

@@ -0,0 +1 @@
+{{#isFormParam}}{{#notFile}}{{{dataType}}} {{paramName}}{{/notFile}}{{#isFile}}FormDataContentDisposition fileDetail{{/isFile}}{{/isFormParam}}

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

@@ -0,0 +1 @@
+{{#isHeaderParam}}{{{dataType}}} {{paramName}}{{/isHeaderParam}}

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

@@ -0,0 +1 @@
+{{#isPathParam}}{{{dataType}}} {{paramName}}{{/isPathParam}}

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

@@ -0,0 +1 @@
+{{#isQueryParam}}{{{dataType}}} {{paramName}}{{/isQueryParam}}