001    package net.sf.cpsolver.exam.criteria;
002    
003    import java.util.Map;
004    import java.util.Set;
005    
006    import net.sf.cpsolver.exam.model.Exam;
007    import net.sf.cpsolver.exam.model.ExamPlacement;
008    import net.sf.cpsolver.exam.model.ExamStudent;
009    
010    /**
011     * Number of direct student conflicts caused by the fact that a student is
012     * not available.
013     * <br><br>
014     * Direct student conflict weight can be set by problem property
015     * Exams.DirectConflictWeight, or in the input xml file, property
016     * directConflictWeight.
017     * 
018     * <br>
019     * 
020     * @version ExamTT 1.2 (Examination Timetabling)<br>
021     *          Copyright (C) 2008 - 2012 Tomas Muller<br>
022     *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
023     *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
024     * <br>
025     *          This library is free software; you can redistribute it and/or modify
026     *          it under the terms of the GNU Lesser General Public License as
027     *          published by the Free Software Foundation; either version 3 of the
028     *          License, or (at your option) any later version. <br>
029     * <br>
030     *          This library is distributed in the hope that it will be useful, but
031     *          WITHOUT ANY WARRANTY; without even the implied warranty of
032     *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
033     *          Lesser General Public License for more details. <br>
034     * <br>
035     *          You should have received a copy of the GNU Lesser General Public
036     *          License along with this library; if not see
037     *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
038     */
039    public class StudentNotAvailableConflicts extends StudentDirectConflicts {
040    
041        @Override
042        public double getValue(ExamPlacement value, Set<ExamPlacement> conflicts) {
043            Exam exam = value.variable();
044            int penalty = 0;
045            for (ExamStudent s : exam.getStudents()) {
046                if (!s.isAvailable(value.getPeriod()))
047                    penalty++;
048            }
049            return penalty;
050        }
051    
052        @Override
053        public String getName() {
054            return "Not Available Conflicts";
055        }
056        
057        @Override
058        public void getInfo(Map<String, String> info) {
059        }
060    
061        @Override
062        public String toString() {
063            return (getValue() <= 0.0 ? "" : "NA:" + sDoubleFormat.format(getValue()));
064        }
065    
066    }