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     */
022    package org.granite.hibernate4;
023    
024    import java.io.Serializable;
025    
026    import javax.persistence.Entity;
027    
028    import org.granite.logging.Logger;
029    import org.granite.messaging.amf.io.util.DefaultClassGetter;
030    import org.granite.util.TypeUtil;
031    import org.hibernate.Hibernate;
032    import org.hibernate.proxy.HibernateProxy;
033    import org.hibernate.proxy.LazyInitializer;
034    
035    /**
036     * @author Franck WOLFF
037     */
038    public class HibernateClassGetter extends DefaultClassGetter {
039    
040        private final static Logger log = Logger.getLogger(HibernateClassGetter.class);
041    
042        @Override
043        public Class<?> getClass(Object o) {
044    
045            if (o instanceof HibernateProxy) {
046                HibernateProxy proxy = (HibernateProxy)o;
047                LazyInitializer initializer = proxy.getHibernateLazyInitializer();
048                
049                String className = (
050                    initializer.isUninitialized() ?
051                    initializer.getEntityName() :
052                    initializer.getImplementation().getClass().getName()
053                ); 
054                
055                if (className != null && className.length() > 0) {
056                    try {
057                        return TypeUtil.forName(className);
058                    } catch (Exception e) {
059                        log.warn(e, "Could not get class with initializer: %s for: %s", initializer.getClass().getName(), className);
060                    }
061                }
062                // fallback...
063                return initializer.getPersistentClass();
064            }
065    
066            return super.getClass(o);
067        }
068        
069        @Override
070        public boolean isEntity(Object o) {
071            return o.getClass().isAnnotationPresent(Entity.class)   ;    
072        }
073    
074        @Override
075        public Serializable getIdentifier(Object o) {
076            if (o instanceof HibernateProxy)
077                    return ((HibernateProxy)o).getHibernateLazyInitializer().getIdentifier();
078            return null;
079        }
080        
081        @Override
082        public boolean isInitialized(Object owner, String propertyName, Object propertyValue) {
083            return Hibernate.isInitialized(propertyValue);
084        }
085        
086        @Override
087        public void initialize(Object owner, String propertyName, Object propertyValue) {
088            Hibernate.initialize(propertyValue);
089        }
090    }