/** * <a href="http://www.openolat.org"> * OpenOLAT - Online Learning and Training</a><br> * <p> * Licensed under the Apache License, Version 2.0 (the "License"); <br> * you may not use this file except in compliance with the License.<br> * You may obtain a copy of the License at the * <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache homepage</a> * <p> * Unless required by applicable law or agreed to in writing,<br> * software distributed under the License is distributed on an "AS IS" BASIS, <br> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br> * See the License for the specific language governing permissions and <br> * limitations under the License. * <p> * Initial code contributed and copyrighted by<br> * frentix GmbH, http://www.frentix.com * <p> */package org.olat.modules.video.manager;import java.io.InputStream;import java.io.OutputStream;import org.olat.core.util.xml.XStreamHelper;import org.olat.modules.video.VideoMarker;import org.olat.modules.video.VideoMarkers;import org.olat.modules.video.VideoQuestion;import org.olat.modules.video.VideoQuestions;import org.olat.modules.video.model.VideoMarkerImpl;import org.olat.modules.video.model.VideoMarkersImpl;import org.olat.modules.video.model.VideoQuestionImpl;import org.olat.modules.video.model.VideoQuestionsImpl;import com.thoughtworks.xstream.XStream;import com.thoughtworks.xstream.security.ExplicitTypePermission;/** * The XStream has its security features enabled. *  * Initial date: 5 sept. 2018<br> * @author srosse, stephane.rosse@frentix.com, http://www.frentix.com * */public class VideoXStream {		private static final XStream xstream = XStreamHelper.createXStreamInstance();	static {		Class<?>[] types = new Class[] {				VideoMarker.class, VideoMarkerImpl.class, VideoMarkers.class, VideoMarkersImpl.class,				VideoQuestion.class, VideoQuestionImpl.class, VideoQuestions.class, VideoQuestionsImpl.class		};		xstream.addPermission(new ExplicitTypePermission(types));		xstream.ignoreUnknownElements();		xstream.alias("marker", VideoMarkerImpl.class);		xstream.alias("markers", VideoMarkers.class);		xstream.alias("question", VideoQuestionImpl.class);		xstream.alias("questions", VideoQuestions.class);	}		public static void toXml(OutputStream out, Object obj) {		xstream.toXML(obj, out);	}		@SuppressWarnings("unchecked")	public static <U> U fromXml(InputStream in, @SuppressWarnings("unused") Class<U> cl) {		Object obj = xstream.fromXML(in);		return (U)obj;	}}