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.hibernate;
023
024 import java.io.Serializable;
025 import java.util.List;
026
027 import org.granite.logging.Logger;
028 import org.granite.tide.TideTransactionManager;
029 import org.granite.tide.data.AbstractTidePersistenceManager;
030 import org.granite.util.Entity;
031 import org.hibernate.Query;
032 import org.hibernate.SessionFactory;
033
034 /**
035 * Responsible for attaching a session with the persistence mangager
036 * @author cingram
037 *
038 */
039 public class HibernatePersistenceManager extends AbstractTidePersistenceManager {
040
041 private static final Logger log = Logger.getLogger(HibernatePersistenceManager.class);
042
043 private SessionFactory sessionFactory;
044
045
046 public HibernatePersistenceManager(TideTransactionManager tm) {
047 super(tm);
048 }
049
050 public HibernatePersistenceManager(SessionFactory sf) {
051 super(null);
052 this.sessionFactory = sf;
053 }
054
055 public HibernatePersistenceManager(SessionFactory sf, TideTransactionManager tm) {
056 super(tm);
057 this.sessionFactory = sf;
058 }
059
060 @Override
061 public void close() {
062 }
063
064 /**
065 * attaches the entity to the JPA context.
066 * @return the attached entity
067 */
068 @Override
069 public Object fetchEntity(Object entity, String[] fetch) {
070 Entity tideEntity = new Entity(entity);
071 Serializable id = (Serializable)tideEntity.getIdentifier();
072
073 if (id == null)
074 return null;
075
076 if (fetch == null)
077 return sessionFactory.getCurrentSession().load(entity.getClass(), id);
078
079 for (String f : fetch) {
080 Query q = sessionFactory.getCurrentSession().createQuery("select e from " + entity.getClass().getName() + " e left join fetch e." + f + " where e = :entity");
081 q.setParameter("entity", entity);
082 List<?> results = q.list();
083 if (!results.isEmpty())
084 entity = results.get(0);
085 else
086 log.warn("Could not find entity %s to initialize, id: %s", entity.getClass().getName(), id);
087 }
088 return entity;
089 }
090 }