com.github.andyshao.proxy.CglibProxyFactory Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of Useful-Tools Show documentation
Some thing about the useful tools of the JDK 1.8.
The newest version!
package com.github.andyshao.proxy;

import java.lang.reflect.Method;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.InvocationHandler;

/**
 * 
 * Title:the proxy factory of cglib

 * Descript:

 * Copyright: Copryright(c) Mar 17, 2014

 * Encoding:UNIX UTF-8
 * 
 * @author Andy.Shao
 *
 * @param  the type of target
 */
public abstract class CglibProxyFactory implements ProxyFactory {

    /**
     * 
     * Title:

     * Descript:

     * Copyright: Copryright(c) Mar 17, 2014

     * Encoding:UNIX UTF-8
     * 
     * @author Andy.Shao
     *
     */
    public class DefaultInvocationHandler implements InvocationHandler {
        private final T proxied;

        public DefaultInvocationHandler(T proxied) {
            this.proxied = proxied;
        }

        @Override
        public Object invoke(Object obj , Method method , Object[] args) throws Throwable {
            if (CglibProxyFactory.this.proxyMethods(this.proxied, method, args)) {
                return CglibProxyFactory.this.invoke(this.proxied , method , args);
            }
            return method.invoke(this.proxied , args);
        }

    }

    @Override
    public T apply(T target) {
        return this.getProxy(target , new DefaultInvocationHandler(target));
    }

    @SuppressWarnings("unchecked")
    public T getProxy(T target , InvocationHandler invocationHandler) {
        Enhancer enhancer = new Enhancer();
        enhancer.setSuperclass(target.getClass());
        enhancer.setInterfaces(ProxyFactory.allInterfaces(target));
        enhancer.setCallback(invocationHandler);
        return (T) enhancer.create();
    }

    /**
     * when the method which will be invoke should be proxy.
     * this method will be run.
     * 
     * @param target the target which will be proxy
     * @param method the method which will be invoke
     * @param args the args of method
     * @return the answer of method
     * @throws Throwable andy exception when run this method
     */
    protected abstract Object invoke(T target , Method method , Object[] args) throws Throwable;

    /**
     * the methods which will be proxied
     * 
     * @param target the target which will be proxy
     * @param method the method which will be invoke
     * @param args the args of method
     * @return the methods collection
     */
    protected abstract boolean proxyMethods(T target , Method method , Object[] args);
}