001    package net.sf.cpsolver.exam.reports;
002    
003    import java.util.Comparator;
004    
005    import net.sf.cpsolver.exam.model.Exam;
006    import 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 Tomas Muller<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     */
032    public 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    }