001 /**
002 * GRANITE DATA SERVICES
003 * Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 * This file is part of the Granite Data Services Platform.
006 *
007 * Granite Data Services is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * Granite Data Services is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 * General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 * USA, or see <http://www.gnu.org/licenses/>.
021 */
022 package org.granite.tide.seam.lazy;
023
024 import java.io.Serializable;
025
026 import org.granite.context.GraniteContext;
027 import org.granite.messaging.amf.io.util.ClassGetter;
028 import org.granite.tide.TidePersistenceManager;
029 import org.hibernate.Session;
030 import org.jboss.seam.Entity;
031 import org.jboss.seam.util.Reflections;
032
033 /**
034 * Manager responsible for the maintaining a reference for the HibernateContext.
035 * @author CIngram
036 */
037 public class HibernateContextManager implements TidePersistenceManager {
038
039 private Session session = null;
040
041 public HibernateContextManager() {
042
043 }
044
045 public HibernateContextManager(Session session) {
046 this.session = session;
047 }
048
049 /**
050 * Attach the passed in entity with the HibernateSession.
051 * @param entity
052 * @return the attached entity object
053 */
054 public Object attachEntity(Object entity, String[] propertyNames) {
055 Object attachedEntity = null;
056 ClassGetter getter = GraniteContext.getCurrentInstance().getGraniteConfig().getClassGetter();
057
058 try {
059 attachedEntity = fetchEntity(entity, propertyNames);
060
061 if (propertyNames != null) {
062 for (int i = 0; i < propertyNames.length; i++) {
063 Object initializedObj = Reflections.getGetterMethod(attachedEntity.getClass(), propertyNames[i]).invoke(attachedEntity);
064
065 getter.initialize(entity, propertyNames[i], initializedObj);
066 }
067 }
068 }
069 catch(Exception e) {
070 throw new RuntimeException("Unable to attach entity and init collection", e);
071 }
072 disconnectSession();
073
074 return attachedEntity;
075 }
076
077 /**
078 * attaches the entity to the HibernateSession.
079 * @return the attached entity
080 */
081 public Object fetchEntity(Object entity, String[] fetch) {
082 Serializable id = (Serializable)Entity.forClass(entity.getClass()).getIdentifier(entity);
083 if (id == null)
084 return null;
085 return session.get(entity.getClass(), id);
086 }
087
088 /**
089 * disconnects from the Hibernate Session.
090 */
091 protected void disconnectSession() {
092 session.disconnect();
093 }
094 }