/* ********************************************************************** **
** Copyright notice **
** **
** (c) 2005-2009 RSSOwl Development Team **
** http://www.rssowl.org/ **
** **
** All rights reserved **
** **
** This program and the accompanying materials are made available under **
** the terms of the Eclipse Public License v1.0 which accompanies this **
** distribution, and is available at: **
** http://www.rssowl.org/legal/epl-v10.html **
** **
** A copy is found in the file epl-v10.html and important notices to the **
** license from the team is found in the textfile LICENSE.txt distributed **
** in this package. **
** **
** This copyright notice MUST APPEAR in all copies of the file! **
** **
** Contributors: **
** RSSOwl Development Team - initial API and implementation **
** **
** ********************************************************************** */
package org.rssowl.core.internal.persist.migration;
import org.eclipse.core.runtime.IProgressMonitor;
import org.rssowl.core.internal.persist.News;
import org.rssowl.core.internal.persist.NewsBin;
import org.rssowl.core.internal.persist.service.ConfigurationFactory;
import org.rssowl.core.internal.persist.service.Migration;
import org.rssowl.core.persist.INewsBin;
import org.rssowl.core.persist.reference.NewsReference;
import com.db4o.Db4o;
import com.db4o.ObjectContainer;
import com.db4o.query.Query;
import java.util.List;
/**
* Migration from version 3 (nightly from 13-Jan-2008) to 4 (nightly of
* 17-Jan-2008).
*/
public class Migration3To4 implements Migration {
public int getDestinationFormat() {
return 4;
}
public int getOriginFormat() {
return 3;
}
public MigrationResult migrate(ConfigurationFactory configFactory, String dbFileName, IProgressMonitor progressMonitor) {
final int totalProgress = 100;
int totalProgressIncremented = 0;
progressMonitor.beginTask(Messages.Migration3To4_MIGRATING_DATA, totalProgress);
ObjectContainer oc = Db4o.openFile(configFactory.createConfiguration(), dbFileName);
List<NewsBin> newsBins = oc.query(NewsBin.class);
for (INewsBin newsBin : newsBins) {
oc.activate(newsBin, Integer.MAX_VALUE);
for (NewsReference newsRef : newsBin.getNewsRefs()) {
Query query = oc.query();
query.constrain(News.class);
query.descend("fId").constrain(newsRef.getId()); //$NON-NLS-1$
News news = (News) query.execute().iterator().next();
oc.activate(news, Integer.MAX_VALUE);
String parentIdFieldName = "fParentId"; //$NON-NLS-1$
MigrationHelper.setField(news, parentIdFieldName, newsBin.getId().longValue());
oc.ext().store(news, Integer.MAX_VALUE);
}
}
oc.commit();
oc.close();
progressMonitor.worked(totalProgress - totalProgressIncremented);
return new MigrationResult(true, false, true);
}
}