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.openjpa;
023    
024    import java.util.Map;
025    
026    import javax.persistence.Entity;
027    
028    import org.apache.openjpa.enhance.PersistenceCapable;
029    import org.granite.logging.Logger;
030    import org.granite.messaging.amf.io.util.DefaultClassGetter;
031    
032    /**
033     * @author Franck WOLFF
034     */
035    public class OpenJpaClassGetter extends DefaultClassGetter {
036    
037        public final static Logger log = Logger.getLogger(OpenJpaClassGetter.class);
038    
039        @Override
040        public Class<?> getClass(Object o) {
041            // Nothing special here: OpenJPA uses null value for uninitialized properties.
042            return super.getClass(o);
043        }
044        
045        @Override
046        public boolean isEntity(Object o) {
047            return o.getClass().isAnnotationPresent(Entity.class);    
048        }
049        
050        
051        @Override
052        public boolean isInitialized(Object owner, String propertyName, Object propertyValue) {
053            if (propertyValue != null || !(owner instanceof PersistenceCapable))
054                    return true;
055            Map<String, Boolean> loadedState = OpenJpaExternalizer.getLoadedState((PersistenceCapable)owner, getClass(owner));
056            return loadedState.containsKey(propertyName) && loadedState.get(propertyName);
057        }
058        
059        @Override
060        public void initialize(Object owner, String propertyName, Object propertyValue) {
061            // Nothing to do: getting the property value when an EntityManager is opened should actually fetch
062            // the uninitialized property...
063        }
064    }