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/*
 * Copyright 2007-2107 the original author or authors.
 *
 * 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.
 */
package net.ymate.platform.mvc.context;

import java.util.Map;


/**
 * 
 * Context
 * 
 * 
 * MVC环境上下文对象封装类；
 * 
 * 
 * @author 刘镇([email protected])
 * @version 0.0.0
 *          
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 *          
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 *          
 *          版本号 动作 修改人 修改时间
0.0.0 创建类 刘镇 2012-12-3下午3:51:42
 */
public class Context {

	protected static ThreadLocal __THREAD_LOCAL_CONTEXT = new ThreadLocal();

	private Map __context_map;

	/**
	 * Sets the Context for the current thread.
	 * 
	 * @param context the Context.
	 */
	public static void setContext(Context context) {
		__THREAD_LOCAL_CONTEXT.set(context);
	}

	/**
	 * Returns the Context specific to the current thread.
	 * 
	 * @return the Context for the current thread, is never null.
	 */
	public static Context getContext() {
		return __THREAD_LOCAL_CONTEXT.get();
	}

	/**
	 * 构造器
	 * 
	 * @param contextMap
	 */
	public Context(Map contextMap) {
		__context_map = contextMap;
	}

	/**
	 * Returns a value that is stored in the current Context by doing a lookup using the value's key.
	 * 
	 * @param key the key used to find the value.
	 * @return the value that was found using the key or null if the key was not found.
	 */
	public Object get(String key) {
		return __context_map.get(key);
	}

	/**
	 * Stores a value in the current Context. The value can be looked up using the key.
	 * 
	 * @param key the key of the value.
	 * @param value the value to be stored.
	 */
	public void put(String key, Object value) {
		__context_map.put(key, value);
	}

	/**
	 * Sets the context map.
	 * 
	 * @param contextMap the context map.
	 */
	public void setContextMap(Map contextMap) {
		__context_map = contextMap;
	}

	/**
	 * Gets the context map.
	 * 
	 * @return the context map.
	 */
	public Map getContextMap() {
		return __context_map;
	}

}