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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.xstream;

import com.thoughtworks.xstream.XStream;
import org.tinygroup.xstream.config.XStreamConfiguration;

import java.util.HashMap;
import java.util.Map;

/**
 * 
 * @author luoguo
 * 
 */
public final class XStreamFactory {

	private static Map xstreamMap = new HashMap();

	private XStreamFactory() {
	}

	public static XStream getXStream() {
		return getXStream("");
	}

	public static XStream getXStream(String key) {
		String xstreamKey = key;
		if (key == null) {
			xstreamKey = "";
		}
		XStream xstream = xstreamMap.get(xstreamKey);
		if (xstream == null) {
			xstream = newXStream(null);
			xstreamMap.put(xstreamKey, xstream);
		}
		return xstream;
	}

	public static XStream getXStream(String key, ClassLoader classLoader) {
		String xstreamKey = key;
		if (key == null) {
			xstreamKey = "";
		}
		XStream xstream = xstreamMap.get(xstreamKey);
		if (xstream == null) {
			xstream = newXStream(classLoader);
			xstreamMap.put(xstreamKey, xstream);
		}
		return xstream;
	}

	private static XStream newXStream(ClassLoader classLoader) {
		XStream xstream = new XStream();
		if (classLoader != null) {
			xstream.setClassLoader(classLoader);
		}else{
			xstream.setClassLoader(XStreamFactory.class.getClassLoader());
		}
		xstream.autodetectAnnotations(true);
		xstream.setMode(XStream.NO_REFERENCES);
		xstream.processAnnotations(XStreamConfiguration.class);
		return xstream;
	}
}