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.tide.hibernate;
023
024import java.util.Map;
025
026import org.granite.hibernate.HibernateOptimisticLockException;
027import org.granite.tide.data.ChangeSet;
028import org.granite.tide.data.ChangeSetApplier;
029import org.granite.tide.data.ChangeSetProxy;
030import org.hibernate.HibernateException;
031import org.hibernate.StaleObjectStateException;
032import org.hibernate.event.MergeEvent;
033import org.hibernate.event.def.DefaultMergeEventListener;
034
035
036public class HibernateDataChangeMergeListener extends DefaultMergeEventListener {
037
038        private static final long serialVersionUID = 1L;
039
040        @Override
041        public void onMerge(MergeEvent event) throws HibernateException {
042                try {
043                        super.onMerge(event);
044                }
045                catch (StaleObjectStateException e) {
046                        HibernateOptimisticLockException.rethrowOptimisticLockException(event.getSession(), e);
047                }
048        }
049
050        @SuppressWarnings("rawtypes")
051        @Override
052        public void onMerge(MergeEvent event, Map copiedAlready) throws HibernateException {
053                if (event.getOriginal() instanceof ChangeSetProxy || event.getOriginal() instanceof ChangeSet) {
054                        ChangeSet changeSet = event.getOriginal() instanceof ChangeSet ? (ChangeSet)event.getOriginal() : ((ChangeSetProxy)event.getOriginal()).getChangeSetProxyData();
055                        Object result = new ChangeSetApplier(new HibernatePersistenceAdapter(event.getSession())).applyChanges(changeSet)[0];
056                        event.setResult(result);
057                        return;
058                }
059                
060                try {
061                        super.onMerge(event, copiedAlready);
062                }
063                catch (StaleObjectStateException e) {
064                        HibernateOptimisticLockException.rethrowOptimisticLockException(event.getSession(), e);
065                }
066        }
067}