find Annotation on Class - Java java.lang.annotation

Java examples for java.lang.annotation:Class Annotation

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Description

find Annotation on Class

Demo Code

/*/*from   w w  w .  j a v a 2 s  . co m*/
 * This is a program for Language Grid Core Node. This combines multiple language resources and provides composite language services.
 * Copyright (C) 2005-2012 NICT Language Grid Project.
 *
 * This program is free software: you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by 
 * the Free Software Foundation, either version 2.1 of the License, or (at 
 * your option) any later version.
 *
 * 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 program. If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import java.lang.annotation.Annotation;
import java.lang.reflect.Array;

public class Main {
    /**
     * 
     * 
     */
    public static <T extends Annotation> T find(Annotation[] annots,
            Class<T> clazz) {
        for (Annotation a : annots) {
            if (a.annotationType().equals(clazz)) {
                return clazz.cast(a);
            }
        }
        return null;
    }

    /**
     * 
     * 
     */
    @SuppressWarnings("unchecked")
    public static <T extends Annotation> T[] find(Annotation[][] annots,
            Class<T> clazz) {
        Object[] ret = new Object[annots.length];
        for (int i = 0; i < ret.length; i++) {
            ret[i] = find(annots[i], clazz);
        }
        Object arr = Array.newInstance(clazz, ret.length);
        System.arraycopy(ret, 0, arr, 0, ret.length);
        return (T[]) arr;
    }
}

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