no.abmu.common.AuditEntryComparator.java Source code

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Here is the source code for no.abmu.common.AuditEntryComparator.java

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/*$Id: AuditEntryComparator.java 11122 2008-10-29 03:55:31Z jens $*/
/*
 ****************************************************************************
 *                                                                          *
 *                   (c) Copyright 2004 ABM-utvikling                       *
 *                                                                          *
 * 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. http://www.gnu.org/licenses/gpl.html    *
 *                                                                          *
 ****************************************************************************
 */

package no.abmu.common;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.util.Comparator;

/**
 * AuditEntryComparator.
 * 
 * @author Erik Romson, erik@zenior.no
 * @author $Author:jens $
 * @version $Rev: 11122 $
 * $Date: 2008-10-29 04:55:31 +0100 (Wed, 29 Oct 2008) $
 * copyright ABM-Utvikling
 * @since 2004-12-09 (Rev. 210)
 */
public class AuditEntryComparator implements Comparator {

    private static final Log logger = (Log) LogFactory.getLog(AuditEntryComparator.class);

    public int compare(Object o1, Object o2) {
        if (o1 == o2) {
            return 0;
        }
        if (!(o1 instanceof AuditEntry)) {
            return 1;
        }
        if (!(o2 instanceof AuditEntry)) {
            return 1;
        }

        final AuditEntry auditEntry1 = (AuditEntry) o1;
        final AuditEntry auditEntry2 = (AuditEntry) o2;

        if ((auditEntry1 == null) && (auditEntry1.getPointInTime() != null)
                && ((auditEntry2 == null) && (auditEntry2.getPointInTime() != null))) {

            return auditEntry1.getPointInTime().equals(auditEntry2.getPointInTime()) ? -1
                    : auditEntry1.getPointInTime().compareTo(auditEntry2.getPointInTime());
        } else {
            return -1;
        }
    }
}