001    package net.sf.cpsolver.coursett.criteria.placement;
002    
003    import java.util.Collection;
004    import java.util.Map;
005    
006    import net.sf.cpsolver.coursett.criteria.TimetablingCriterion;
007    import net.sf.cpsolver.coursett.model.Lecture;
008    import net.sf.cpsolver.ifs.util.DataProperties;
009    
010    /**
011     * Abstract class for all criteria that are to be used only in the placement selection
012     * (do not have any impact on the overall solution value). Such criterion is for instance
013     * the number of hard conflict (values that have to be unassigned before a selected
014     * value can be assigned for the problem to remain consistent). 
015     * <br>
016     * 
017     * @version CourseTT 1.2 (University Course Timetabling)<br>
018     *          Copyright (C) 2006 - 2011 Tomas Muller<br>
019     *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
020     *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
021     * <br>
022     *          This library is free software; you can redistribute it and/or modify
023     *          it under the terms of the GNU Lesser General Public License as
024     *          published by the Free Software Foundation; either version 3 of the
025     *          License, or (at your option) any later version. <br>
026     * <br>
027     *          This library is distributed in the hope that it will be useful, but
028     *          WITHOUT ANY WARRANTY; without even the implied warranty of
029     *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
030     *          Lesser General Public License for more details. <br>
031     * <br>
032     *          You should have received a copy of the GNU Lesser General Public
033     *          License along with this library; if not see
034     *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
035     */
036    public abstract class PlacementSelectionCriterion extends TimetablingCriterion {
037    
038        public PlacementSelectionCriterion() {
039            iValueUpdateType = ValueUpdateType.NoUpdate;
040        }
041        
042        @Override
043        public double getWeightDefault(DataProperties config) {
044            return 0.0;
045        }
046        
047        @Override
048        public void getInfo(Map<String, String> info) {
049        }
050        
051        @Override
052        public void getInfo(Map<String, String> info, Collection<Lecture> variables) {
053        }
054    
055    }