/* ********************************************************************** **
** 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.persist.dao;
import org.rssowl.core.persist.ICategory;
import org.rssowl.core.persist.event.CategoryEvent;
import org.rssowl.core.persist.event.CategoryListener;
import org.rssowl.core.persist.service.PersistenceException;
import java.util.Set;
/**
* A data-access-object for <code>ICategory</code>s.
*
* @author Ismael Juma (ismael@juma.me.uk)
*/
public interface ICategoryDAO extends IEntityDAO<ICategory, CategoryListener, CategoryEvent> {
/**
* Loads a sorted <code>Set</code> of category names for all categories that
* are persisted and have non-null names.
*
* @return a sorted <code>Set</code> of Strings containing all categories
* that are persisted in the persistence layer.
* @throws PersistenceException In case of an error while accessing the
* persistance layer implementation.
*/
Set<String> loadAllNames() throws PersistenceException;
}