/* ********************************************************************** **
** Copyright notice **
** **
** (c) 2005-2006 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.dao;
import org.rssowl.core.internal.persist.Feed;
import org.rssowl.core.internal.persist.LazySet;
import org.rssowl.core.internal.persist.service.DBHelper;
import org.rssowl.core.persist.IFeed;
import org.rssowl.core.persist.dao.IFeedDAO;
import org.rssowl.core.persist.event.FeedEvent;
import org.rssowl.core.persist.event.FeedListener;
import org.rssowl.core.persist.reference.FeedReference;
import org.rssowl.core.persist.service.PersistenceException;
import com.db4o.ObjectSet;
import com.db4o.ext.Db4oException;
import java.net.URI;
import java.util.Collection;
/**
* A data-access-object for <code>IFeed</code>s.
*
* @author Ismael Juma (ismael@juma.me.uk)
*/
public final class FeedDAOImpl extends AbstractEntityDAO<IFeed, FeedListener, FeedEvent> implements IFeedDAO {
/** Default constructor using the specific IPersistable for this DAO */
public FeedDAOImpl() {
super(Feed.class, false);
}
@Override
protected final void doSave(IFeed entity) {
DBHelper.saveFeed(fDb, entity);
}
@Override
protected final FeedEvent createDeleteEventTemplate(IFeed entity) {
return createSaveEventTemplate(entity);
}
@Override
protected final FeedEvent createSaveEventTemplate(IFeed entity) {
return new FeedEvent(entity, true);
}
public final Feed load(URI link) {
return DBHelper.loadFeed(fDb, link, Integer.MAX_VALUE);
}
@Override
public final Collection<IFeed> loadAll() {
try {
ObjectSet<? extends IFeed> entities = fDb.query(fEntityClass);
return new LazySet<IFeed>(entities, fDb);
} catch (Db4oException e) {
throw new PersistenceException(e);
}
}
// FIXME Not sure if this makes sense anymore. If we decide to keep it, try
// to make it more efficient
public final FeedReference loadReference(URI link) {
IFeed feed = DBHelper.loadFeed(fDb, link, null);
if (feed == null) {
return null;
}
return new FeedReference(feed.getId());
}
}