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.granite.context.GraniteContext;
027import org.granite.messaging.amf.io.util.ClassGetter;
028import org.granite.tide.TidePersistenceManager;
029import org.hibernate.Session;
030import org.jboss.seam.Entity;
031import org.jboss.seam.util.Reflections;
032
033/**
034 * Manager responsible for the maintaining a reference for the HibernateContext. 
035 * @author CIngram
036 */
037public class HibernateContextManager implements TidePersistenceManager {
038        
039        private Session session = null;
040        
041        public HibernateContextManager() {
042                
043        }
044        
045        public HibernateContextManager(Session session) {
046                this.session = session;
047        }
048        
049        /**
050         * Attach the passed in entity with the HibernateSession.
051         * @param entity
052         * @return the attached entity object
053         */
054        public Object attachEntity(Object entity, String[] propertyNames) {
055                Object attachedEntity = null;
056        ClassGetter getter = GraniteContext.getCurrentInstance().getGraniteConfig().getClassGetter();
057        
058                try { 
059                    attachedEntity = fetchEntity(entity, propertyNames);
060                        
061                        if (propertyNames != null) {
062                    for (int i = 0; i < propertyNames.length; i++) {
063                        Object initializedObj = Reflections.getGetterMethod(attachedEntity.getClass(), propertyNames[i]).invoke(attachedEntity);
064                        
065                        getter.initialize(entity, propertyNames[i], initializedObj);
066                            }
067                        }
068                } 
069                catch(Exception e) {
070                        throw new RuntimeException("Unable to attach entity and init collection", e);
071                }
072                disconnectSession();
073                
074                return attachedEntity;
075        }
076        
077        /**
078         * attaches the entity to the HibernateSession.
079         * @return the attached entity
080         */
081        public Object fetchEntity(Object entity, String[] fetch) {
082            Serializable id = (Serializable)Entity.forClass(entity.getClass()).getIdentifier(entity);
083            if (id == null)
084                return null;
085            return session.get(entity.getClass(), id);
086        }
087    
088        /**
089         * disconnects from the Hibernate Session.
090         */
091        protected void disconnectSession() {
092                session.disconnect();
093        }
094}