Java Reflection Method Get from Object getMethod(Class cls, String method, Object[] params)

Description

Get the method based on its name

License

Apache License

Parameter

Parameter	Description
cls	target class
method	method name
params	parameters

Exception

Parameter	Description
NoSuchMethodException	an exception

Return

method

Declaration

public static Method getMethod(Class<?> cls, String method, Object[] params) throws NoSuchMethodException 

Method Source Code

//package com.java2s;
/**/*  w w w . ja v  a 2s . c om*/
 * 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 {
    /**
     * Get the method based on its name
     * 
     * @param cls target class
     * @param method method name
     * @param params parameters
     * @return method
     * @throws NoSuchMethodException
     */
    public static Method getMethod(Class<?> cls, String method, Object[] params) throws NoSuchMethodException {
        Class<?>[] classes = new Class[params.length];
        for (int i = 0; i < params.length; i++) {
            classes[i] = params[i].getClass();
        }
        return cls.getMethod(method, classes);
    }

    /**
     * Get the actual class
     * 
     * @param obj target object
     * @return actual class
     */
    public static Class<?> getClass(Object obj) {
        Class<?> cls = obj.getClass();
        while (isProxied(cls)) {
            cls = cls.getSuperclass();
        }
        return cls;
    }

    /**
     * Check is the class is proxies
     * 
     * @param cls class
     * @return proxied
     */
    public static boolean isProxied(Class<?> cls) {
        return cls.getName().contains("$$EnhancerByCGLIB$$") || cls.getName().contains("$$FastClassByCGLIB$$")
                || cls.getName().contains("_$$_javassist") || cls.getName().contains("_$$_WeldSubclass")
                || cls.getName().contains("$Proxy$");
    }
}

Related

1. getMethod(Class c, String methodName, Object... pa)
2. getMethod(Class objectClass, String methodName, String argumentType)
3. getMethod(Class type, String name, Object[] args)
4. getMethod(Class clz, String methodName, Class[] methodArgs)
5. getMethod(Class type, String name, Class... parameterTypes)
6. getMethod(Class clz, String methodName, Object... params)
7. getMethod(Class klass, String methodName, Object... params)
8. getMethod(Class objectType, String methodName, Class... parameterTypes)
9. getMethod(Class type, String name, Object[] args)