Java Reflection Annotation getAnnotationInherited(Class type, Class annotationClass)

License

Declaration

private static <A extends Annotation> A getAnnotationInherited(Class<?> type, Class<A> annotationClass) 

Method Source Code

//package com.java2s;
/*//from w w w  .  j  ava 2s . com
 *  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 {
    private static <A extends Annotation> A getAnnotationInherited(Class<?> type, Class<A> annotationClass) {
        A ann = type.getAnnotation(annotationClass);
        if (ann != null) {
            return ann;
        }
        Class<?> superClass = type.getSuperclass();
        if (superClass != null) {
            ann = getAnnotationInherited(superClass, annotationClass);
            if (ann != null) {
                return ann;
            }
        }
        for (Class<?> iface : type.getInterfaces()) {
            ann = getAnnotationInherited(iface, annotationClass);
            if (ann != null) {
                return ann;
            }
        }
        return null;
    }
}

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