app/src/main/java/org/apache/roller/weblogger/pojos/WeblogEntryWrapperComparator.java

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
*  contributor license agreements.  The ASF licenses this file to You
* 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.  For additional information regarding
* copyright in this work, please see the NOTICE file in the top level
* directory of this distribution.
*/

package org.apache.roller.weblogger.pojos;

import java.io.Serializable;
import java.util.Comparator;
import org.apache.roller.weblogger.pojos.wrapper.WeblogEntryWrapper;

/**
 * Sorts WeblogEntryData objects in reverse chronological order
 * (most recently published entries first).  If they happen to
 * have the same pubTime, then sort alphabetically by title.
 * 
 * @author lance.lavandowska
 */
public class WeblogEntryWrapperComparator implements Comparator, Serializable
{
    static final long serialVersionUID = -9067148992322255150L;
    
    public int compare(Object val1, Object val2) {
        WeblogEntryWrapper entry1 = (WeblogEntryWrapper)val1;
        WeblogEntryWrapper entry2 = (WeblogEntryWrapper)val2;
        long pubTime1 = entry1.getPubTime().getTime();
        long pubTime2 = entry2.getPubTime().getTime();

        if (pubTime1 > pubTime2) {
            return -1;
        }
        else if (pubTime1 < pubTime2) {
            return 1;
        }

        // if pubTimes are the same, return results of String.compareTo() on Title
        return entry1.getTitle().compareTo(entry2.getTitle());
    }
}