动态代理

package com.rainteen.framework.util.proxy;


import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;


import com.rainteen.framework.xml.dom4j.IXMLDom4JParser;


/**
 * JDK
 * @author rainteen
 * @version 1.0
 */
@SuppressWarnings("all")
public class DynamicProxy implements InvocationHandler {
private Object target=null;

public DynamicProxy(){}

public DynamicProxy(Object target){
if(target!=null)
this.target=target;
}

/**
* @return
*/
public Object getProxy(){
if(this.target==null)
return null;
return Proxy.newProxyInstance(
this.getClass().getClassLoader(), 
this.target.getClass().getInterfaces(),
this);
}
/**
* @param target
* @return
*/
public Object getProxy(Object target){
if(target==null)
return null;
this.target=target;
System.err.println("DynamicProxy::getProxy() is running...");

return Proxy.newProxyInstance(
this.getClass().getClassLoader(), 
this.target.getClass().getInterfaces(),
this);
}
/**
* @param proxy
* @param method
* @param args
*/
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
Object resObj=null;
if(this.target!=null){
Class clazz=this.target.getClass();
if(IXMLDom4JParser.class.isAssignableFrom(clazz)){
System.err.println("DynamicProxy::invoke() target object is IXMLDom4JParser instance...");
resObj=method.invoke(this.target, args);
}
}
return resObj;
}


/**
* @param args
*/
public static void main(String[] args) {
String xml="<?xml version='1.0' encoding='GBK'?>" +
"<input id='in'><handler id='checkUser' value=''>com.rainteen.ajax.DeliverArticle</handler>" +
"<params id='params'><param id='userName'>com.rainteen.ajax.ValidateUser</param>" +
"<param id='password'>dontknow</param></params></input>";

System.out.println(xml);
}


}