Java Method Call invokeNonAccessibleMethod(Class clazz, String methodName, Object instance, Object... params)

Description

invoke Non Accessible Method

License

Open Source License

Declaration

public static Object invokeNonAccessibleMethod(Class<?> clazz,
        String methodName, Object instance, Object... params) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * ENdoSnipe 5.0 - (https://github.com/endosnipe)
 * /* w  w w .  j av  a2  s.com*/
 * The MIT License (MIT)
 * 
 * Copyright (c) 2012 Acroquest Technology Co.,Ltd.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 ******************************************************************************/

import java.lang.reflect.Method;

import java.util.ArrayList;

import java.util.List;

public class Main {

    public static Object invokeNonAccessibleMethod(Class<?> clazz,
            String methodName, Object instance, Object... params) {
        List<Class<?>> targetParamTypes = new ArrayList<Class<?>>();

        if (params != null) {
            for (Object param : params) {
                targetParamTypes.add(param.getClass());
            }
        }
        Object retVal = null;

        try {
            Method targetMethod = getParamTypesMatchMethod(clazz,
                    methodName, params);
            targetMethod.setAccessible(true);
            retVal = targetMethod.invoke(instance, params);
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }

        return retVal;
    }

    private static Method getParamTypesMatchMethod(Class<?> clazz,
            String methodName, Object... params) {
        Method[] methods = clazz.getDeclaredMethods();

        for (Method method : methods) {
            if (!method.getName().equals(methodName)) {
                continue;
            }

            Class<?>[] paramTypes = method.getParameterTypes();

            if (paramTypes.length != params.length) {
                continue;
            }

            boolean matchParamType = true;
            for (int index = 0; index < params.length; index++) {
                if (!paramTypes[index].isInstance(params[index])) {
                    matchParamType = false;
                    break;
                }
            }

            if (matchParamType) {
                return method;
            }
        }

        return null;
    }
}

Related

1. invokeInstanceMethod(Object target, String methodName, Class type, Object arg)
2. invokeIteratorCallable(String callableClassName, ClassLoader cl)
3. invokeMXMethod(String methodName)
4. invokeNoArgs(Object instance, Method method, Class returnType)
5. invokeNoArgsMethod(Object object, String methodName)
6. invokeNonArgMethod(Object object, String methodName)
7. invokeObjectMethod(Object object, String name, Class paramTypes[], Object args[])
8. invokeOrBailOut(Object invokee, Method method, Object[] params)
9. invokeParameterlessMethod(T theObject, String methodName)