Java Reflection Method Annotation getMethodsWithAnnotation(Class clazz, Class annotationType)

Description

get Methods With Annotation

License

Apache License

Declaration

public static Method[] getMethodsWithAnnotation(Class<?> clazz, Class<? extends Annotation> annotationType) 

Method Source Code

//package com.java2s;
/*//from w  ww  .j  ava  2s . co m
 * Copyright 2016 OPEN TONE Inc.
 *
 * 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;
import java.util.ArrayList;
import java.util.List;

public class Main {

    public static Method[] getMethodsWithAnnotation(Class<?> clazz, Class<? extends Annotation> annotationType) {
        List<Method> result = new ArrayList<Method>();
        for (Class<?> c = clazz; c != null; c = c.getSuperclass()) {
            for (Method method : c.getMethods()) {
                if (method.getAnnotation(annotationType) != null && !contains(result, method)) {
                    // if (method.getAnnotation(annotationType) != null &&
                    // !result.contains(method)) {
                    result.add(method);
                }
            }
        }
        return result.toArray(new Method[0]);
    }

    private static boolean contains(List<Method> methods, Method candidate) {
        for (Method m : methods) {
            if (m.getName().equals(candidate.getName())) {
                return true;
            }
        }
        return false;
    }
}

Related

1. getMethodsAnnotatedWith(Class clazz, Class annotation)
2. getMethodsAnnotatedWith(final Class type, final Class annotation)
3. getMethodsInAnnotation(Annotation anno)
4. getMethodsWithAnnotation(Class annotation, Class clazz)
5. getMethodsWithAnnotation(Class type, Class obj)
6. getMethodsWithAnnotation(Class type, Class annotation, boolean checkSuper)
7. getMethodsWithAnnotation(final Class clazz, final Class... annotationClasses)
8. getMethodValue(Class annotationClasss, Class targetClass, String... annotationFields)