// BlogBridge -- RSS feed reader, manager, and web based service
// Copyright (C) 2002-2006 by R. Pito Salas
//
// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software Foundation;
// either version 2 of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with this program;
// if not, write to the Free Software Foundation, Inc., 59 Temple Place,
// Suite 330, Boston, MA 02111-1307 USA
//
// Contact: R. Pito Salas
// mailto:pitosalas@users.sourceforge.net
// More information: about BlogBridge
// http://www.blogbridge.com
// http://sourceforge.net/projects/blogbridge
//
// $Id: ArticleStatusProperty.java,v 1.7 2007/02/20 15:15:55 spyromus Exp $
//
package com.salas.bb.domain.query.articles;
import com.salas.bb.domain.query.AbstractProperty;
import com.salas.bb.domain.query.PropertyType;
import com.salas.bb.domain.query.IComparisonOperation;
import com.salas.bb.domain.query.general.StringEqualsCO;
import com.salas.bb.domain.IArticle;
import com.salas.bb.utils.i18n.Strings;
/**
* Article status property represents two possible statuses: read and unread.
*/
public class ArticleStatusProperty extends AbstractProperty
{
/** Instance of this property. */
public static final ArticleStatusProperty INSTANCE = new ArticleStatusProperty();
/** Unread value. */
public static final String VALUE_UNREAD = "unread";
/** Read value. */
public static final String VALUE_READ = "read";
/**
* Creates property.
*/
public ArticleStatusProperty()
{
super(Strings.message("query.property.article.status"), "article-status", PropertyType.STATUS, VALUE_UNREAD,
new IComparisonOperation[] { StringEqualsCO.INSTANCE });
}
/**
* Compares the corresponding property of the target object to the value using specific
* comparison operation.
*
* @param target target object.
* @param operation comparison operation, supported by this property.
* @param value value to compare against.
*
* @return TRUE if the object matches the criteria.
*
* @throws NullPointerException if target, operation or value are NULL's.
* @throws ClassCastException if target is not supported.
* @throws IllegalArgumentException if operation is not supported.
*/
public boolean match(Object target, IComparisonOperation operation, String value)
{
IArticle article = (IArticle)target;
String targetValue = statusToValue(article);
return operation.match(targetValue, value);
}
private String statusToValue(IArticle aArticle)
{
return aArticle.isRead() ? VALUE_READ : VALUE_UNREAD;
}
}