BindInterceptor.java

/**
 * 
 * Copyright 2008 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 *
 * @project loonframework
 * @author chenpeng  
 * @email：ceponline@yahoo.com.cn 
 * @version 0.1
 */
package org.ripple.power.ioc.injector;

import java.util.Stack;

public class BindInterceptor implements Interceptor {

	private static ThreadLocal<Stack<Object>> threadLocal = new ThreadLocal<Stack<Object>>();

	public void before(Object key) {
		Stack<Object> stack = getStack();
		if (stack == null) {
			stack = new Stack<Object>();
			stack.push(key);
			threadLocal.set(stack);
		} else {
			stack.push(key);
		}
	}

	public void after(Object key) {
		Stack<Object> stack = getStack();
		stack.pop();
	}

	private Stack<Object> getStack() {
		return (Stack<Object>) threadLocal.get();
	}

	public void clear() {
		Stack<?> stack = getStack();
		if (stack != null) {
			stack.clear();
		}
	}

}