Java examples for java.lang.annotation:Class Annotation
find Class Annotation Declared With
/*/*from w w w . j a v a 2s . c om*/ * Copyright 2011 Alibaba Group Holding Limited. * All rights reserved. * * Licensed 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 com.java2s; import java.lang.annotation.Annotation; import java.util.Arrays; public class Main { public static void main(String[] argv) throws Exception { Class clazz = String.class; Class annotationType = String.class; System.out.println(findClassAnnotationDeclaredWith(clazz, annotationType)); } public static Class<?> findClassAnnotationDeclaredWith(Class<?> clazz, Class<? extends Annotation> annotationType) { if (clazz == null || clazz.equals(Object.class)) { return null; } return (isAnnotationDeclaredWith(clazz, annotationType)) ? clazz : findClassAnnotationDeclaredWith(clazz.getSuperclass(), annotationType); } public static boolean isAnnotationDeclaredWith(Class<?> clazz, Class<? extends Annotation> annotationType) { boolean annotationDeclared = false; for (Annotation annotation : Arrays.asList(clazz .getDeclaredAnnotations())) { if (annotation.annotationType().equals(annotationType)) { annotationDeclared = true; break; } } return annotationDeclared; } }