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.seam.lazy;
023
024import java.io.Serializable;
025
026import org.hibernate.Query;
027import org.hibernate.Session;
028import org.jboss.seam.Component;
029import org.jboss.seam.Entity;
030
031/**
032 * Manager responsible for looking up the Hibernate Session for the
033 * passed in SessionManagerName
034 * @author CIngram
035 */
036public class SeamHibernateManager extends HibernateContextManager  {
037        
038        private String sessionManagerName = null;
039        private Session session = null;
040
041        public SeamHibernateManager(String sessionManagerName) {
042                this.sessionManagerName = sessionManagerName;
043        }
044        
045
046        /**
047         * Attach the passed in entity with the HibernateManager stored 
048         * in Seam.
049         * @param entity
050         * @return the attached hibernate object
051         */
052    @Override
053    public Object fetchEntity(Object entity, String[] fetch) {
054        Serializable id = (Serializable)Entity.forClass(entity.getClass()).getIdentifier(entity);
055        if (id == null)
056            return null;
057        
058        this.session = (Session)Component.getInstance(sessionManagerName);
059        
060        if (fetch == null)
061                return session.get(entity.getClass(), id);
062        
063        for (String f : fetch) {
064                Query q = session.createQuery("select e from " + entity.getClass().getName() + " e left join fetch e." + f + " where e = :entity");
065                q.setParameter("entity", entity);
066                entity = q.uniqueResult();
067        }
068        return entity;
069    }
070        
071        /**
072         * Disconnects from the current hibernate session.
073         */
074        @Override
075        protected void disconnectSession() {
076                session.disconnect();
077        }
078}