| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.tuscany.sca.binding.rest.provider; |
| |
| import java.lang.annotation.Annotation; |
| import java.lang.reflect.Method; |
| |
| import javax.ws.rs.HttpMethod; |
| import javax.ws.rs.Path; |
| |
| /** |
| * A utility class that deals with JAX-RS annotations |
| */ |
| public class JAXRSHelper { |
| private JAXRSHelper() { |
| |
| } |
| |
| /** |
| * A resource class is a Java class that uses JAX-RS annotations to implement a corresponding Web resource. |
| * Resource classes are POJOs that have at least one method annotated with @Path or a request method designator. |
| * @param cls |
| * @return |
| */ |
| public static boolean isJAXRSResource(Class<?> cls) { |
| for (Method method : cls.getMethods()) { |
| if (method.isAnnotationPresent(Path.class)) { |
| return true; |
| } |
| if (isResourceMethod(method)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Root resource class is a resource class annotated with @Path. Root resource classes provide the roots of the |
| * resource class tree and provide access to sub-resources |
| * @param cls |
| * @return |
| */ |
| public static boolean isJAXRSRootResource(Class<?> cls) { |
| return cls.isAnnotationPresent(Path.class) && isJAXRSResource(cls); |
| } |
| |
| public static boolean isResourceMethod(Method method) { |
| for (Annotation a : method.getAnnotations()) { |
| Class<?> annotationType = a.annotationType(); |
| if (annotationType == HttpMethod.class) { |
| return true; |
| } |
| // Http method related annotations such as @GET, @POST will have itself annotated with |
| // @HttpMethod |
| HttpMethod m = a.annotationType().getAnnotation(HttpMethod.class); |
| if (m != null) { |
| return true; |
| } |
| } |
| return false; |
| |
| } |
| } |