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 javax.persistence.EntityManager;
025
026import org.granite.tide.TidePersistenceManager;
027import org.jboss.seam.Component;
028import org.jboss.seam.Component.BijectedAttribute;
029import org.jboss.seam.annotations.In;
030import org.jboss.seam.framework.PersistenceController;
031
032
033/**
034 * Factory for creating the correct ITidePersistenceManager based on the 
035 * persistence strategy passed in. Supported types are 
036 * EntityManager,Session, EntityQuery, EntityHome, HibernateEntityHome and a
037 * injected(@In) EntityManager or HibernateSession
038 * @author CIngram
039 */
040public class TidePersistenceFactory {
041
042        
043        /**
044         * Create the ITidePersistenceManager. Supported types are 
045     * EntityManager,Session, EntityQuery, EntityHome, HibernateEntityHome and a
046     * injected(@In) EntityManager or HibernateSession
047         * 
048         * @param component
049         * @param persistenceType
050         * @return a ITidePersistenceManager.
051         */
052        @SuppressWarnings({ "unchecked", "rawtypes" })
053        public static TidePersistenceManager createTidePersistence(Component component, Object persistenceType) {
054                if (persistenceType instanceof EntityManager){
055                        return createTidePersistence(component, (EntityManager)persistenceType);
056                } else if (persistenceType instanceof PersistenceController) {
057                        return createTidePersistence(component, (PersistenceController)persistenceType);
058        } else if (persistenceType instanceof BijectedAttribute) {
059                        return createTidePersistence(component, ((BijectedAttribute<In>)persistenceType));
060                }
061                
062                return null;
063        }
064        
065        
066        /**
067         * Create a ITideInterceptor for a EntityManager.
068         * 
069         * @param component
070         * @param persistenceType
071         * @return a ITidePersistenceManager.
072         */
073        public static TidePersistenceManager createTidePersistence(Component component, EntityManager persistenceType) {
074            return new PersistenceContextManager(persistenceType);
075        }
076    
077    /**
078     * Create  ITidePersistenceManager for a PersistenceController
079         * 
080         * @param component
081     * @param controller
082     * @return a ITidePersistenceManager.
083     */
084    public static TidePersistenceManager createTidePersistence(Component component, PersistenceController<?> controller) {
085        String controllerName = component.getName();
086        if (controller.getPersistenceContext() instanceof EntityManager)
087            return new PersistenceControllerManager(controllerName);
088        return null;
089    } 
090        
091        /**
092         * Create a ITidePersistenceManager for a injected attribute(@In). 
093         * Supported Types are EntityManager or Session.
094         * 
095         * @param component
096         * @param att
097         * @return a ITidePersistenceManager.
098         */
099        public static TidePersistenceManager createTidePersistence(Component component, BijectedAttribute<In> att) {
100                if (att.getType() == EntityManager.class) {
101                        return new SeamEntityManager(att.getName());
102                }
103                return null;
104        }
105}