lockmixin.java

Spring2.0宝典

package lee;

import org.springframework.aop.support.DelegatingIntroductionInterceptor;
import org.aopalliance.intercept.MethodInvocation;
/**
 * @author  yeeku.H.lee [e-mail]
 * @version  1.0
 * <br>Copyright (C), 2005-2008, yeeku.H.Lee
 * <br>This program is protected by copyright laws.
 * <br>Program Name:
 * <br>Date: 
 */
public class LockMixin extends DelegatingIntroductionInterceptor implements Lockable
{ 
    private boolean locked; 
    public void lock()
	{
        this.locked = true;
    } 
    public void unlock()
	{
        this.locked = false;
    } 
    public boolean locked()
	{
        return this.locked;
    } 
    public Object invoke(MethodInvocation invocation) throws Throwable 
	{
        if (locked() && invocation.getMethod().getName().indexOf("set") == 0)
            throw new LockedException("属性加锁,无法修改");
        return super.invoke(invocation);
    } 
}