get Method Annotation Map - Java java.lang.annotation

Java examples for java.lang.annotation:Method Annotation

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Description

get Method Annotation Map

Demo Code

/*/*from w ww.  jav  a 2s .  c o m*/
 * Copyright (C) 2013 Matija Mazi
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
//package com.java2s;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

public class Main {
    /**
     * @return a map of annotations on the method that belong to the given collection.
     */
    static Map<Class<? extends Annotation>, Annotation> getMethodAnnotationMap(
            Method method,
            Collection<Class<? extends Annotation>> annotationClasses) {
        Annotation[] methodAnnotations = method.getAnnotations();
        Map<Class<? extends Annotation>, Annotation> methodAnnotationMap = new HashMap<Class<? extends Annotation>, Annotation>();
        for (Annotation methodAnnotation : methodAnnotations) {
            methodAnnotationMap.put(methodAnnotation.annotationType(),
                    methodAnnotation);
        }
        methodAnnotationMap.keySet().retainAll(annotationClasses);
        return methodAnnotationMap;
    }
}

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