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.openjpa;
022    
023    import java.util.Map;
024    
025    import javax.persistence.Entity;
026    
027    import org.apache.openjpa.enhance.PersistenceCapable;
028    import org.granite.logging.Logger;
029    import org.granite.messaging.amf.io.util.DefaultClassGetter;
030    
031    /**
032     * @author Franck WOLFF
033     */
034    public class OpenJpaClassGetter extends DefaultClassGetter {
035    
036        public final static Logger log = Logger.getLogger(OpenJpaClassGetter.class);
037    
038        @Override
039        public Class<?> getClass(Object o) {
040            // Nothing special here: OpenJPA uses null value for uninitialized properties.
041            return super.getClass(o);
042        }
043        
044        @Override
045        public boolean isEntity(Object o) {
046            return o.getClass().isAnnotationPresent(Entity.class);    
047        }
048        
049        
050        @Override
051        public boolean isInitialized(Object owner, String propertyName, Object propertyValue) {
052            if (propertyValue != null || !(owner instanceof PersistenceCapable))
053                    return true;
054            Map<String, Boolean> loadedState = OpenJpaExternalizer.getLoadedState((PersistenceCapable)owner, getClass(owner));
055            return loadedState.containsKey(propertyName) && loadedState.get(propertyName);
056        }
057        
058        @Override
059        public void initialize(Object owner, String propertyName, Object propertyValue) {
060            // Nothing to do: getting the property value when an EntityManager is opened should actually fetch
061            // the uninitialized property...
062        }
063    }