BookingBottlePositionComparator.java

/*
 * Copyright 2011, MyCellar
 *
 * This file is part of MyCellar.
 *
 * MyCellar 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 3 of the License, or
 * (at your option) any later version.
 *
 * MyCellar 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 MyCellar. If not, see <http://www.gnu.org/licenses/>.
 */
package fr.mycellar.domain.booking.comparator;

import java.io.Serializable;
import java.util.Comparator;

import fr.mycellar.domain.booking.BookingBottle;

/**
 * @author speralta
 */
public class BookingBottlePositionComparator implements Comparator<BookingBottle>, Serializable {

    private static final long serialVersionUID = 201205301634L;

    @Override
    public int compare(BookingBottle o1, BookingBottle o2) {
        if ((o1 == null) && (o2 == null)) {
            return 0;
        }
        if ((o1 != null) && (o2 == null)) {
            return -1;
        }
        if ((o1 == null) && (o2 != null)) {
            return 1;
        }
        if (o1 == o2) {
            return 0;
        }
        if (o1.getPosition() == null) {
            return 1;
        }
        if (o2.getPosition() == null) {
            return -1;
        }
        return o1.getPosition().compareTo(o2.getPosition());
    }

}