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.hibernate4;
023    
024    import java.io.Serializable;
025    
026    import org.granite.tide.TideTransactionManager;
027    import org.granite.tide.data.AbstractTidePersistenceManager;
028    import org.granite.util.Entity;
029    import org.hibernate.Query;
030    import org.hibernate.SessionFactory;
031    
032    /**
033     * Responsible for attaching a session with the persistence mangager
034     * @author cingram
035     *
036     */
037    public 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    }