ProxyedObjectMethodInvocation.java

package org.theonefx.wcframework.aop;

import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Method;

import org.theonefx.aopaloance.intercept.MethodInterceptor;
import org.theonefx.aopaloance.intercept.MethodInvocation;

/**
 * @Package org.fx.wcframework.aop
 * @ClassName: MethodInvocation
 * @author 陈曦
 * @date 2011-1-24 20:01:09
 * @Description: 拦截器链的调用器
 */
public class ProxyedObjectMethodInvocation implements MethodInvocation {
	// 当前拦截器在拦截器链中的索引号
	private int index = -1;

	private InterceptorChain chain;

	private TargetMethodInvoker targetMethodInvoker;

	public ProxyedObjectMethodInvocation(TargetMethodInvoker targetMethodInvoker, InterceptorChain chain) {
		this.chain = chain;
		this.targetMethodInvoker = targetMethodInvoker;
	}

	public Object proceed() throws Throwable {
		index++;
		if (index >= chain.getSize()) {
			return targetMethodInvoker.invoke();
		}

		MethodInterceptor interceptor = chain.get(index);
		if (interceptor != null) {
			return interceptor.invoke(this);
		} else {
			return proceed();
		}
	}

	public Method getMethod() {
		return targetMethodInvoker.getMethod();
	}

	public Object[] getArguments() {
		return (targetMethodInvoker.getArgs() != null ? targetMethodInvoker.getArgs() : new Object[0]);
	}

	public AccessibleObject getStaticPart() {
		return targetMethodInvoker.getMethod();
	}

	public Object getThis() {
		return targetMethodInvoker.getTarget();
	}

	public int getIndex() {
		return index;
	}
}