find Annotation from Class - Java java.lang.annotation

Java examples for java.lang.annotation:Class Annotation

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Description

find Annotation from Class

Demo Code

/*/*from w  w  w .  j a  v a  2 s .co  m*/
 * 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;

public class Main {
    public static <T extends Annotation> T find(final Class<T> needle,
            final Annotation[] haystack) {
        if (haystack == null) {
            return null;
        }
        for (Annotation ann : haystack) {
            if (ann.annotationType().equals(needle)) {
                return (T) ann;
            }
        }
        return null;
    }
}

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