/* ********************************************************************** **
** 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.dao;
import org.eclipse.core.runtime.Assert;
import org.rssowl.core.internal.persist.ConditionalGet;
import org.rssowl.core.persist.IConditionalGet;
import org.rssowl.core.persist.dao.IConditionalGetDAO;
import org.rssowl.core.persist.service.PersistenceException;
import com.db4o.ext.Db4oException;
import com.db4o.query.Query;
import java.net.URI;
/**
* A data-access-object for <code>IConditionalGet</code>s.
*
* @author Ismael Juma (ismael@juma.me.uk)
*/
public final class ConditionalGetDAOImpl extends AbstractPersistableDAO<IConditionalGet> implements IConditionalGetDAO {
/** Default constructor using the specific IPersistable for this DAO */
public ConditionalGetDAOImpl() {
super(ConditionalGet.class, true);
}
public IConditionalGet load(URI link) {
Assert.isNotNull(link, "link cannot be null"); //$NON-NLS-1$
try {
Query query = fDb.query();
query.constrain(fEntityClass);
query.descend("fLink").constrain(link.toString()); //$NON-NLS-1$
for (IConditionalGet entity : getList(query)) {
fDb.activate(entity, Integer.MAX_VALUE);
return entity;
}
} catch (Db4oException e) {
throw new PersistenceException(e);
}
return null;
}
}