001    package net.sf.cpsolver.ifs.criteria;
002    
003    import java.util.Set;
004    
005    import net.sf.cpsolver.ifs.model.Model;
006    import net.sf.cpsolver.ifs.model.Value;
007    import net.sf.cpsolver.ifs.model.Variable;
008    import net.sf.cpsolver.ifs.util.DataProperties;
009    
010    /**
011     * Simple Criterion: Sum of {@link Value#toDouble()}. <br>
012     * <br>
013     * This criterion only counts a sum of values (see {@link Value#toDouble()}) of the assigned variables.
014     * It is an alternative to the default {@link Model#getTotalValue()}.
015     * 
016     * @version IFS 1.2 (Iterative Forward Search)<br>
017     *          Copyright (C) 2006 - 2011 Tomas Muller<br>
018     *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
019     *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
020     * <br>
021     *          This library is free software; you can redistribute it and/or modify
022     *          it under the terms of the GNU Lesser General Public License as
023     *          published by the Free Software Foundation; either version 3 of the
024     *          License, or (at your option) any later version. <br>
025     * <br>
026     *          This library is distributed in the hope that it will be useful, but
027     *          WITHOUT ANY WARRANTY; without even the implied warranty of
028     *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
029     *          Lesser General Public License for more details. <br>
030     * <br>
031     *          You should have received a copy of the GNU Lesser General Public
032     *          License along with this library; if not see
033     *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
034     */
035    public class AssignedValue<V extends Variable<V, T>, T extends Value<V, T>> extends AbstractCriterion<V, T>{
036        
037        @Override
038        public double getWeightDefault(DataProperties config) {
039            return 1.0;
040        }
041    
042        @Override
043        public double getValue(T value, Set<T> conflicts) {
044            double ret = value.toDouble();
045            if (conflicts != null)
046                for (T conflict: conflicts)
047                    ret -= conflict.toDouble();
048            return ret;
049        }
050    
051    }