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/**
* <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>
* 12.10.2011 by frentix GmbH, http://www.frentix.com
* <p>
*/
package org.olat.modules.openmeetings.manager;
import java.io.StringWriter;
import java.util.Date;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.persistence.TypedQuery;
import org.olat.core.commons.persistence.DB;
import org.olat.core.id.OLATResourceable;
import org.olat.core.util.xml.XStreamHelper;
import org.olat.group.BusinessGroup;
import org.olat.modules.openmeetings.model.OpenMeetingsRoom;
import org.olat.modules.openmeetings.model.OpenMeetingsRoomReference;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.CompactWriter;
/**
*
* @author srosse, [email protected], http://www.frentix.com
*/
@Service
public class OpenMeetingsDAO {
@Autowired
private DB dbInstance;
private XStream xStream;
@PostConstruct
public void init() {
xStream = XStreamHelper.createXStreamInstance();
// BUG: CWE-91 XML Injection (aka Blind XPath Injection)
//
// FIXED:
XStreamHelper.allowDefaultPackage(xStream);
xStream.alias("room", OpenMeetingsRoom.class);
xStream.omitField(OpenMeetingsRoom.class, "property");
xStream.omitField(OpenMeetingsRoom.class, "numOfUsers");
}
public OpenMeetingsRoomReference createReference(final BusinessGroup group, final OLATResourceable courseResource, String subIdentifier, OpenMeetingsRoom room) {
String serialized = serializeRoom(room);
OpenMeetingsRoomReference ref = new OpenMeetingsRoomReference();
ref.setLastModified(new Date());
ref.setRoomId(room.getRoomId());
ref.setConfig(serialized);
ref.setGroup(group);
if(courseResource != null) {
ref.setResourceTypeName(courseResource.getResourceableTypeName());
ref.setResourceTypeId(courseResource.getResourceableId());
}
ref.setSubIdentifier(subIdentifier);
dbInstance.getCurrentEntityManager().persist(ref);
return ref;
}
public List<OpenMeetingsRoomReference> getReferences() {
StringBuilder sb = new StringBuilder();
sb.append("select ref from ").append(OpenMeetingsRoomReference.class.getName()).append(" ref");
return dbInstance.getCurrentEntityManager().createQuery(sb.toString(), OpenMeetingsRoomReference.class).getResultList();
}
public OpenMeetingsRoomReference getReference(BusinessGroup group, OLATResourceable courseResource, String subIdentifier) {
StringBuilder sb = new StringBuilder();
sb.append("select ref from ").append(OpenMeetingsRoomReference.class.getName()).append(" ref");
boolean where = false;
if(group != null) {
where = and(sb, where);
sb.append(" ref.group.key=:groupKey");
}
if(courseResource != null) {
where = and(sb, where);
sb.append(" ref.resourceTypeName=:resName and ref.resourceTypeId=:resId");
}
if(subIdentifier != null) {
where = and(sb, where);
sb.append(" ref.subIdentifier=:subIdentifier");
}
TypedQuery<OpenMeetingsRoomReference> query = dbInstance.getCurrentEntityManager().createQuery(sb.toString(), OpenMeetingsRoomReference.class);
if(group != null) {
query.setParameter("groupKey", group.getKey());
}
if(courseResource != null) {
query.setParameter("resName", courseResource.getResourceableTypeName());
query.setParameter("resId", courseResource.getResourceableId());
}
if(subIdentifier != null) {
query.setParameter("subIdentifier", subIdentifier);
}
List<OpenMeetingsRoomReference> refs = query.getResultList();
if(refs.isEmpty()) {
return null;
}
return refs.get(0);
}
public OpenMeetingsRoomReference updateReference(BusinessGroup group, OLATResourceable courseResource, String subIdentifier, OpenMeetingsRoom room) {
OpenMeetingsRoomReference property = getReference(group, courseResource, subIdentifier);
if(property == null) {
property = createReference(group, courseResource, subIdentifier, room);
} else {
String serialized = serializeRoom(room);
property.setLastModified(new Date());
property.setConfig(serialized);
property = dbInstance.getCurrentEntityManager().merge(property);
}
return property;
}
public void delete(OpenMeetingsRoomReference ref) {
OpenMeetingsRoomReference reloadedRef = dbInstance.getCurrentEntityManager()
.getReference(OpenMeetingsRoomReference.class, ref.getKey());
dbInstance.getCurrentEntityManager().remove(reloadedRef);
}
public String serializeRoom(OpenMeetingsRoom room) {
StringWriter writer = new StringWriter();
xStream.marshal(room, new CompactWriter(writer));
writer.flush();
return writer.toString();
}
public OpenMeetingsRoom deserializeRoom(String room) {
return (OpenMeetingsRoom)xStream.fromXML(room);
}
private final boolean and(StringBuilder sb, boolean and) {
if(and) sb.append(" and ");
else sb.append(" where ");
return true;
}
} |