001package org.cpsolver.exam.reports;
002
003import java.util.Comparator;
004
005import org.cpsolver.exam.model.Exam;
006import org.cpsolver.exam.model.ExamRoomPlacement;
007
008
009/**
010 * Compare two rooms by size. Either normal seating size or alternative sating
011 * size is used, based on the given exam (see {@link Exam#hasAltSeating()}. <br>
012 * <br>
013 * 
014 * @version ExamTT 1.3 (Examination Timetabling)<br>
015 *          Copyright (C) 2008 - 2014 Tomáš Müller<br>
016 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
017 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
018 * <br>
019 *          This library is free software; you can redistribute it and/or modify
020 *          it under the terms of the GNU Lesser General Public License as
021 *          published by the Free Software Foundation; either version 3 of the
022 *          License, or (at your option) any later version. <br>
023 * <br>
024 *          This library is distributed in the hope that it will be useful, but
025 *          WITHOUT ANY WARRANTY; without even the implied warranty of
026 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
027 *          Lesser General Public License for more details. <br>
028 * <br>
029 *          You should have received a copy of the GNU Lesser General Public
030 *          License along with this library; if not see
031 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
032 */
033public class ExamRoomComparator implements Comparator<ExamRoomPlacement> {
034    private boolean iAsc;
035    private Exam iExam;
036
037    /**
038     * Constructor
039     * 
040     * @param exam
041     *            exam for which rooms are to be compared
042     * @param asc room order
043     */
044    public ExamRoomComparator(Exam exam, boolean asc) {
045        iExam = exam;
046        iAsc = asc;
047    }
048
049    /**
050     * Compare two rooms based on their normal/alternative seating size
051     */
052    @Override
053    public int compare(ExamRoomPlacement r1, ExamRoomPlacement r2) {
054        int cmp = (iAsc ? 1 : -1)
055                * Double.compare(r1.getSize(iExam.hasAltSeating()), r2.getSize(iExam.hasAltSeating()));
056        if (cmp != 0)
057            return cmp;
058        return r1.getRoom().compareTo(r2.getRoom());
059    }
060}