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.seam.lazy;
022    
023    import java.io.Serializable;
024    
025    import org.hibernate.Session;
026    import org.jboss.seam.Component;
027    import org.jboss.seam.Entity;
028    import org.jboss.seam.framework.PersistenceController;
029    
030    
031    /**
032     * Manager responsible for looking up the EntityHome from the Seam context.
033     * @author cingram
034     *
035     */
036    public class HibernatePersistenceControllerManager extends PersistenceContextManager {
037        
038        private String controllerName;  
039    
040        public HibernatePersistenceControllerManager(String controllerName) {
041            this.controllerName = controllerName;
042        }
043        
044        /**
045         * Attach the passed in entity with the EntityManager stored 
046         * in the EntityHome object.
047         * @param entity
048         * @return the attached hibernate object
049         */
050        @Override
051        public Object fetchEntity(Object entity, String[] fetch) {
052            PersistenceController<?> controller = (PersistenceController<?>)Component.getInstance(controllerName);
053            Session session = (Session)controller.getPersistenceContext();
054            Serializable id = (Serializable)Entity.forClass(entity.getClass()).getIdentifier(entity);
055            if (id == null)
056                return null;
057            return session.get(entity.getClass(), id);
058        }
059    
060    }