    001package net.sf.cpsolver.exam.reports;
    002
    003import java.util.Comparator;
    004
    005import net.sf.cpsolver.exam.model.Exam;
    006import net.sf.cpsolver.exam.model.ExamRoomPlacement;
    007
    008/**
    009 * Compare two rooms by size. Either normal seating size or alternative sating
    010 * size is used, based on the given exam (see {@link Exam#hasAltSeating()}. <br>
    011 * <br>
    012 *
    013 * @version ExamTT 1.2 (Examination Timetabling)<br>
    014 *          Copyright (C) 2008 - 2010 Tomáš Müller<br>
    015 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    016 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    017 * <br>
    018 *          This library is free software; you can redistribute it and/or modify
    019 *          it under the terms of the GNU Lesser General Public License as
    020 *          published by the Free Software Foundation; either version 3 of the
    021 *          License, or (at your option) any later version. <br>
    022 * <br>
    023 *          This library is distributed in the hope that it will be useful, but
    024 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    025 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    026 *          Lesser General Public License for more details. <br>
    027 * <br>
    028 *          You should have received a copy of the GNU Lesser General Public
    029 *          License along with this library; if not see
    030 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
    031 */
    032public class ExamRoomComparator implements Comparator<ExamRoomPlacement> {
    033    private boolean iAsc;
    034    private Exam iExam;
    035
    036    /**
    037     * Constructor
    038     *
    039     * @param exam
    040     *            exam for which rooms are to be compared
    041     */
    042    public ExamRoomComparator(Exam exam, boolean asc) {
    043        iExam = exam;
    044        iAsc = asc;
    045    }
    046
    047    /**
    048     * Compare two rooms based on their normal/alternative seating size
    049     */
    050    @Override
    051    public int compare(ExamRoomPlacement r1, ExamRoomPlacement r2) {
    052        int cmp = (iAsc ? 1 : -1)
    053                * Double.compare(r1.getSize(iExam.hasAltSeating()), r2.getSize(iExam.hasAltSeating()));
    054        if (cmp != 0)
    055            return cmp;
    056        return r1.getRoom().compareTo(r2.getRoom());
    057    }
    058}