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 */
022package org.granite.tide.hibernate4;
023
024import java.io.Serializable;
025
026import org.granite.tide.TideTransactionManager;
027import org.granite.tide.data.AbstractTidePersistenceManager;
028import org.granite.util.Entity;
029import org.hibernate.Query;
030import org.hibernate.SessionFactory;
031
032/**
033 * Responsible for attaching a session with the persistence mangager
034 * @author cingram
035 *
036 */
037public class HibernatePersistenceManager extends AbstractTidePersistenceManager {
038        
039        private SessionFactory sessionFactory;
040        
041        
042        public HibernatePersistenceManager(TideTransactionManager tm) {
043                super(tm);
044        }
045
046        public HibernatePersistenceManager(SessionFactory sf) {
047                super(null);
048        this.sessionFactory = sf;
049        }
050
051        public HibernatePersistenceManager(SessionFactory sf, TideTransactionManager tm) {
052                super(tm);
053        this.sessionFactory = sf;
054        }
055        
056        @Override
057        public void close() {           
058        }
059        
060        /**
061         * attaches the entity to the JPA context.
062         * @return the attached entity
063         */
064        @Override
065        public Object fetchEntity(Object entity, String[] fetch) {
066                Entity tideEntity = new Entity(entity);
067                Serializable id = (Serializable)tideEntity.getIdentifier();
068                
069        if (id == null)
070            return null;
071
072        if (fetch == null)
073                return sessionFactory.getCurrentSession().load(entity.getClass(), id);
074        
075        for (String f : fetch) {
076                Query q = sessionFactory.getCurrentSession().createQuery("select e from " + entity.getClass().getName() + " e left join fetch e." + f + " where e = :entity");
077                q.setParameter("entity", entity);
078                entity = q.uniqueResult();
079        }
080        return entity;
081        }
082}