001    /*
002      GRANITE DATA SERVICES
003      Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004    
005      This file is part of Granite Data Services.
006    
007      Granite Data Services is free software; you can redistribute it and/or modify
008      it under the terms of the GNU Library General Public License as published by
009      the Free Software Foundation; either version 2 of the License, or (at your
010      option) any later version.
011    
012      Granite Data Services is distributed in the hope that it will be useful, but
013      WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014      FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015      for more details.
016    
017      You should have received a copy of the GNU Library General Public License
018      along with this library; if not, see <http://www.gnu.org/licenses/>.
019    */
020    
021    package org.granite.tide.hibernate4;
022    
023    import java.io.Serializable;
024    
025    import org.granite.tide.TideTransactionManager;
026    import org.granite.tide.data.AbstractTidePersistenceManager;
027    import org.granite.util.Entity;
028    import org.hibernate.Query;
029    import org.hibernate.SessionFactory;
030    
031    /**
032     * Responsible for attaching a session with the persistence mangager
033     * @author cingram
034     *
035     */
036    public class HibernatePersistenceManager extends AbstractTidePersistenceManager {
037            
038            private SessionFactory sessionFactory;
039            
040            
041            public HibernatePersistenceManager(TideTransactionManager tm) {
042                    super(tm);
043            }
044    
045            public HibernatePersistenceManager(SessionFactory sf) {
046                    super(null);
047            this.sessionFactory = sf;
048            }
049    
050            public HibernatePersistenceManager(SessionFactory sf, TideTransactionManager tm) {
051                    super(tm);
052            this.sessionFactory = sf;
053            }
054            
055            @Override
056            public void close() {           
057            }
058            
059            /**
060             * attaches the entity to the JPA context.
061             * @return the attached entity
062             */
063            @Override
064            public Object fetchEntity(Object entity, String[] fetch) {
065                    Entity tideEntity = new Entity(entity);
066                    Serializable id = (Serializable)tideEntity.getIdentifier();
067                    
068            if (id == null)
069                return null;
070    
071            if (fetch == null)
072                    return sessionFactory.getCurrentSession().load(entity.getClass(), id);
073            
074            for (String f : fetch) {
075                    Query q = sessionFactory.getCurrentSession().createQuery("select e from " + entity.getClass().getName() + " e left join fetch e." + f + " where e = :entity");
076                    q.setParameter("entity", entity);
077                    entity = q.uniqueResult();
078            }
079            return entity;
080            }
081    }