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/*
* 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;
}
}
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