Java Reflection Method Annotation getMethodOrClassLevelAnnotation(Class annotationClass, Method method, Class clazz)

Description

get Method Or Class Level Annotation

License

Apache License

Declaration

public static <T extends Annotation> T getMethodOrClassLevelAnnotation(Class<T> annotationClass, Method method,
            Class<?> clazz) 

Method Source Code

//package com.java2s;
/*//  www  . j  a v a 2  s  .c  o m
 * Copyright 2008,  Unitils.org
 *
 * 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.
 */

import java.lang.annotation.Annotation;

import java.lang.reflect.Method;

public class Main {
    public static <T extends Annotation> T getMethodOrClassLevelAnnotation(Class<T> annotationClass, Method method,
            Class<?> clazz) {
        T annotation = method.getAnnotation(annotationClass);
        if (annotation != null) {
            return annotation;
        }
        return getClassLevelAnnotation(annotationClass, clazz);
    }

    @SuppressWarnings({ "unchecked" })
    public static <T extends Annotation> T getClassLevelAnnotation(Class<T> annotationClass, Class<?> clazz) {
        if (Object.class.equals(clazz)) {
            return null;
        }

        T annotation = (T) clazz.getAnnotation(annotationClass);
        if (annotation != null) {
            return annotation;
        }
        return getClassLevelAnnotation(annotationClass, clazz.getSuperclass());
    }
}

Related

1. getMethodByAnnotation(Class cls, Class annotationClass)
2. getMethodContainsAnnotations(Class target, Class annotation)
3. getMethodInClassWithAnnotation(Class cls, Class annotationClass, int... modifiers)
4. getMethodLevelAnnotations(Class clazz, Class annotation)
5. getMethodName(final Class annoType, final Class klazType)
6. getMethods(Annotation anno)
7. getMethods(Class clazz, Class annotation)
8. getMethods(final Class clazz, final Class annotation)
9. getMethods(final Class t, final Class a)