Java Reflection Annotation getAnnotation(final Member member, final Class annotation)

License

Parameter

Return

Declaration

public static <A extends Annotation> A getAnnotation(final Member member, final Class<A> annotation) 

Method Source Code

//package com.java2s;
/*/*from  w  w  w .j a va2s .c  o m*/
 * Copyright (c) 2012-2013, Batu Alp Ceylan
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */

import java.lang.annotation.Annotation;

import java.lang.reflect.Field;
import java.lang.reflect.Member;
import java.lang.reflect.Method;

public class Main {
    /**
     * Returns the annotation instance if the <code>member</code> has the <code>annotation</code>.
     * 
     * @param member
     *            the member
     * @param annotation
     *            the type of the annotation instance to return
     * @return the <code>annotation</code> instance if the <code>member</code> has the annotation or null
     * 
     * @param <A>
     *            the class of annotation
     * 
     * @since 2.0.1
     */
    public static <A extends Annotation> A getAnnotation(final Member member, final Class<A> annotation) {
        if (member instanceof Field) {
            return ((Field) member).getAnnotation(annotation);
        }

        if (member instanceof Method) {
            return ((Method) member).getAnnotation(annotation);
        }

        throw new IllegalArgumentException("Member is neither field nor method: " + member);
    }
}

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