    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 * @author  Tomáš Müller
    015 * @version ExamTT 1.3 (Examination Timetabling)<br>
    016 *          Copyright (C) 2008 - 2014 Tomáš Müller<br>
    017 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    018 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    019 * <br>
    020 *          This library is free software; you can redistribute it and/or modify
    021 *          it under the terms of the GNU Lesser General Public License as
    022 *          published by the Free Software Foundation; either version 3 of the
    023 *          License, or (at your option) any later version. <br>
    024 * <br>
    025 *          This library is distributed in the hope that it will be useful, but
    026 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    027 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    028 *          Lesser General Public License for more details. <br>
    029 * <br>
    030 *          You should have received a copy of the GNU Lesser General Public
    031 *          License along with this library; if not see
    032 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
    033 */
    034public class ExamRoomComparator implements Comparator<ExamRoomPlacement> {
    035    private boolean iAsc;
    036    private Exam iExam;
    037
    038    /**
    039     * Constructor
    040     *
    041     * @param exam
    042     *            exam for which rooms are to be compared
    043     * @param asc room order
    044     */
    045    public ExamRoomComparator(Exam exam, boolean asc) {
    046        iExam = exam;
    047        iAsc = asc;
    048    }
    049
    050    /**
    051     * Compare two rooms based on their normal/alternative seating size
    052     */
    053    @Override
    054    public int compare(ExamRoomPlacement r1, ExamRoomPlacement r2) {
    055        int cmp = (iAsc ? 1 : -1)
    056                * Double.compare(r1.getSize(iExam.hasAltSeating()), r2.getSize(iExam.hasAltSeating()));
    057        if (cmp != 0)
    058            return cmp;
    059        return r1.getRoom().compareTo(r2.getRoom());
    060    }
    061}