/*
* Copyright (c) 2009, 2010, 2011, 2012, B3log Team
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.b3log.solo.util.comparator;
import java.util.Comparator;
import java.util.Date;
import org.b3log.solo.model.Article;
import org.json.JSONObject;
/**
* Article comparator by update date.
*
* @author <a href="mailto:DL88250@gmail.com">Liang Ding</a>
* @version 1.0.0.1, Dec 30, 2010
*/
public final class ArticleUpdateDateComparator
implements Comparator<JSONObject> {
/**
* Package default constructor.
*/
ArticleUpdateDateComparator() {
}
@Override
public int compare(final JSONObject article1, final JSONObject article2) {
try {
final Date date1 = (Date) article1.get(Article.ARTICLE_UPDATE_DATE);
final Date date2 = (Date) article2.get(Article.ARTICLE_UPDATE_DATE);
return date2.compareTo(date1);
} catch (final Exception e) {
throw new IllegalStateException(e);
}
}
}