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/**
 *  Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
 *
 *  Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
 *
 *  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 org.tinygroup.springmvc.extension;

import org.springframework.web.context.request.ServletWebRequest;

/**
 * 在线程上下文中保持ExtensionMappingInstance实例和ServletWebRequest
 * 
 * @author renhui
 * 
 */
public class RequestInstanceHolder {

	private static final ThreadLocal extensionLocal = new InheritableThreadLocal();

	/**
	 * request local
	 */
	private static final ThreadLocal reqLocal = new InheritableThreadLocal();

	private static final ThreadLocal extension = new InheritableThreadLocal();

	public static ExtensionMappingInstance getMappingInstance() {
		return extensionLocal.get();
	}

	public static void setMappingInstance(
			ExtensionMappingInstance mappingInstance) {
		extensionLocal.set(mappingInstance);
	}

	/**
	 * 从本地线程中取得{@link ServletWebRequest}对象。
	 *
	 * @return
	 */
	public static ServletWebRequest getServletWebRequest() {
		return reqLocal.get();
	}

	/**
	 * 在本地线程中设置{@link ServletWebRequest}对象。
	 *
	 * @param servletWebRequest
	 */
	public static void setServletWebRequest(ServletWebRequest servletWebRequest) {
		reqLocal.set(servletWebRequest);
	}

	public static String getExtension() {
		return extension.get();
	}

	public static void setExtension(String ext) {
		extension.set(ext);
	}

	public static void clearThreadLocal() {
		extensionLocal.set(null);
		reqLocal.set(null);
		extension.set(null);
	}

}