Java Reflection Method Name getMethod(Class targetClass, String targetMethodName)

Description

get Method

License

Apache License

Declaration

public static Method getMethod(Class targetClass, String targetMethodName) throws NoSuchMethodException 

Method Source Code

//package com.java2s;
/*/*from  www. ja v a2s .  com*/
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.reflect.Method;

public class Main {
    public static Method getMethod(Class targetClass, String targetMethodName) throws NoSuchMethodException {
        return getMethod(targetClass, targetMethodName, null);
    }

    public static Method getMethod(Class targetClass, String targetMethodName, Class... parameterTypes)
            throws NoSuchMethodException {
        Class currentClass = targetClass;
        Method targetMethod = null;

        while (!Object.class.getName().equals(currentClass.getName())) {
            try {
                targetMethod = currentClass.getDeclaredMethod(targetMethodName, parameterTypes);
                break;
            } catch (NoSuchMethodException e) {
                currentClass = currentClass.getSuperclass();
            }
        }

        if (targetMethod == null) {
            for (Class currentInterface : targetClass.getInterfaces()) {
                currentClass = currentInterface;

                while (currentClass != null) {
                    try {
                        targetMethod = currentClass.getDeclaredMethod(targetMethodName, parameterTypes);
                        break;
                    } catch (NoSuchMethodException e) {
                        currentClass = currentClass.getSuperclass();
                    }
                }
            }
        }

        if (targetMethod != null) {
            return targetMethod;
        }

        throw new NoSuchMethodException(
                "there is no method with the name '" + targetMethodName + "'" + " class: " + targetClass.getName());
    }
}

Related

1. getMethod(Class klazz, String[] methodNames, int argCount)
2. getMethod(Class objClass, String methodName, Class argClass)
3. getMethod(Class serviceClass, String methodName, Class... mapClass)
4. getMethod(Class targetClass, String methodName, Class[] paramTypes)
5. getMethod(Class targetClass, String name, Class paramClass)
6. getMethod(Class theClass, String propertyName)
7. getMethod(Class type, String name, Class[] paramTypes)
8. getMethod(Class beanClass, String methodName, Class[] types)
9. getMethod(Class c, String name)