/* ********************************************************************** **
** 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.Description;
import org.rssowl.core.internal.persist.News;
import org.rssowl.core.internal.persist.service.ConfigurationFactory;
import org.rssowl.core.internal.persist.service.Migration;
import com.db4o.Db4o;
import com.db4o.ObjectContainer;
import java.util.List;
/**
* Migration from version 2 (2.0M7) to version 3 (nightly from 13-Jan-2008).
*/
public class Migration2To3 implements Migration {
/*
* @see
* org.rssowl.core.internal.persist.service.Migration#getDestinationFormat()
*/
public int getDestinationFormat() {
return 3;
}
/*
* @see org.rssowl.core.internal.persist.service.Migration#getOriginFormat()
*/
public int getOriginFormat() {
return 2;
}
/*
* @see
* org.rssowl.core.internal.persist.service.Migration#migrate(org.rssowl.core
* .internal.persist.service.ConfigurationFactory, java.lang.String,
* org.eclipse.core.runtime.IProgressMonitor)
*/
public MigrationResult migrate(ConfigurationFactory configFactory, String dbFileName, IProgressMonitor progressMonitor) {
final int totalProgress = 100;
int totalProgressIncremented = 0;
progressMonitor.beginTask(Messages.Migration2To3_MIGRATING_DATA, totalProgress);
ObjectContainer oc = Db4o.openFile(configFactory.createConfiguration(), dbFileName);
totalProgressIncremented = migrate(progressMonitor, totalProgress, totalProgressIncremented, oc);
oc.commit();
oc.close();
progressMonitor.worked(totalProgress - totalProgressIncremented);
return new MigrationResult(false, false, false);
}
static int migrate(IProgressMonitor progressMonitor, final int totalProgress, int totalProgressIncremented, ObjectContainer oc) {
List<News> newsList = oc.query(News.class);
int newsCountPerIncrement = newsList.size() / totalProgress;
int i = 0;
for (News news : newsList) {
oc.activate(news, Integer.MAX_VALUE);
String descriptionFieldName = "fDescription"; //$NON-NLS-1$
String descriptionValue = (String) MigrationHelper.getFieldValue(news, descriptionFieldName);
if (descriptionValue != null) {
MigrationHelper.setField(news, descriptionFieldName, null);
Description description = new Description(news, descriptionValue);
oc.ext().set(description, Integer.MAX_VALUE);
oc.ext().set(news, Integer.MAX_VALUE);
}
++i;
if (newsCountPerIncrement == 0) {
int progressIncrement = totalProgress / newsList.size();
totalProgressIncremented += progressIncrement;
progressMonitor.worked(progressIncrement);
} else if (i % newsCountPerIncrement == 0) {
totalProgressIncremented++;
progressMonitor.worked(1);
}
}
return totalProgressIncremented;
}
}