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.openjpa;
023
024import java.util.Map;
025
026import javax.persistence.Entity;
027
028import org.apache.openjpa.enhance.PersistenceCapable;
029import org.granite.logging.Logger;
030import org.granite.messaging.amf.io.util.DefaultClassGetter;
031
032/**
033 * @author Franck WOLFF
034 */
035public 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}