Java Method Call invoke(Class cls, String methodName, Object... parameter)

Description

invoke

License

Apache License

Declaration

public static Object invoke(Class<?> cls, String methodName, Object... parameter) 

Method Source Code

//package com.java2s;
/**/*from www . j  a  v a  2s  .co m*/
 * Copyright (c) 2011-2014, liuchangng@qq.com.
 *
 * 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.reflect.Method;

public class Main {

    public static Object invoke(Object obj, String methodName, Object... parameter) {
        Class<?>[] parameterTypes = new Class<?>[parameter.length];
        for (int i = 0; i < parameterTypes.length; i++) {
            parameterTypes[i] = parameter[i].getClass();
        }
        try {
            return getMethod(obj, methodName, parameterTypes).invoke(obj, parameter);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static Object invoke(Class<?> cls, String methodName, Object... parameter) {
        Class<?>[] parameterTypes = new Class<?>[parameter.length];
        for (int i = 0; i < parameterTypes.length; i++) {
            parameterTypes[i] = parameter[i].getClass();
        }
        try {
            return getMethod(cls, methodName, parameterTypes).invoke(null, parameter);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static Class<?> getClass(Object obj) {
        try {
            return Class.forName(obj.getClass().getName());
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static Method getMethod(Object obj, String methodName, Class<?>... parameterTypes) {
        try {
            Method method = getClass(obj).getDeclaredMethod(methodName, parameterTypes);
            method.setAccessible(true);
            return method;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static Method getMethod(Class<?> cls, String methodName, Class<?>... parameterTypes) {
        try {
            Method method = cls.getDeclaredMethod(methodName, parameterTypes);
            method.setAccessible(true);
            return method;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

Related

1. invoke(Class targetClass, Object target, String methodName, Class paramType0, Object paramValue0)
2. invoke(Class annotationClass, Object instance, Object[] parameters)
3. invoke(Class clazz, Object obj, String methodName, Object... args)
4. invoke(Class clazz, String methodName, Class[] parameterTypes, Object instance, Object[] args, Class returnType)
5. invoke(Class clazz, String methodName, Object instance, Class[] signature, Object... args)
6. invoke(Class returnType, Method m, Object obj, Object... args)
7. invoke(E e, String methodName)
8. invoke(final Method m, final Object obj, final Object... args)
9. invoke(final Method method, final Object obj, final Object... args)