Java Reflection Annotation getAnnotation(Class classForAnnotation, Class annotationClass)

License

Parameter

Return

Declaration

public static <A extends Annotation> A getAnnotation(Class<?> classForAnnotation, Class<A> annotationClass) 

Method Source Code

//package com.java2s;
/*/*from w w  w .  ja va2  s.  c o  m*/
 * 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.
 */

import java.lang.annotation.Annotation;

public class Main {
    /**
     * Returns annotation for specified class. if current class does not have such annotation then super class is checked.
     * 
     * @param <A>
     * 
     * @param classForAnnotation
     *            to check for specified annotation
     * @param annotationClass
     *            what kind of annotation to lookup
     * @return annotation if found. otherwise - null
     */
    public static <A extends Annotation> A getAnnotation(Class<?> classForAnnotation, Class<A> annotationClass) {
        if (classForAnnotation == null) {
            return null;
        }
        A result = classForAnnotation.getAnnotation(annotationClass);
        if (result != null) {
            return result;
        }
        return getAnnotation(classForAnnotation.getSuperclass(), annotationClass);
    }
}

Related