// 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: FeedStarzProperty.java,v 1.10 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.query.general.LongLessCO;
import com.salas.bb.domain.query.general.LongGreaterCO;
import com.salas.bb.domain.IArticle;
import com.salas.bb.domain.IFeed;
import com.salas.bb.domain.DataFeed;
import com.salas.bb.utils.i18n.Strings;
/**
* Feed starz property of <code>IArticle</code> objects.
*/
public class FeedStarzProperty extends AbstractProperty
{
/** Instance of this property. */
public static final FeedStarzProperty INSTANCE = new FeedStarzProperty();
/** Less than 1 star can't happen to feed. */
public static final String ERR_LESS_1_STAR = Strings.message("query.property.feed.starz.error.less.1.star");
/** More than 5 starz can't happen to feed. */
public static final String ERR_MORE_5_STARZ = Strings.message("query.property.feed.starz.error.more.5.starz");
/** Creates property. */
public FeedStarzProperty()
{
super(Strings.message("query.property.feed.starz"), "feed-starz", PropertyType.STARZ, "3",
new IComparisonOperation[]
{
StringEqualsCO.INSTANCE, LongLessCO.INSTANCE, LongGreaterCO.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;
IFeed feed = article.getFeed();
int rating = -1;
if (feed != null || !(feed instanceof DataFeed))
{
DataFeed dataFeed = (DataFeed)feed;
rating = dataFeed.getRating() + 1;
}
return operation.match(Integer.toString(rating), value);
}
/**
* Validates the value and tells if the value has incorrect format.
*
* @param operation operation which is going to happen.
* @param value value.
*
* @return error message or <code>NULL</code> in successful case.
*/
public String validateValue(IComparisonOperation operation, String value)
{
String errorMessage = super.validateValue(operation, value);
if (errorMessage == null)
{
try
{
int starz = Integer.parseInt(value.trim());
if (operation.equals(LongLessCO.INSTANCE) && starz == 1)
{
errorMessage = ERR_LESS_1_STAR;
} else if (operation.equals(LongGreaterCO.INSTANCE) && starz == 5)
{
errorMessage = ERR_MORE_5_STARZ;
}
} catch (NumberFormatException e)
{
errorMessage = Strings.message("query.property.feed.starz.error.wrong.integer.property.format");
}
};
return errorMessage;
}
}