001package net.sf.cpsolver.ifs.criteria;
002
003import java.util.Set;
004
005import net.sf.cpsolver.ifs.model.Model;
006import net.sf.cpsolver.ifs.model.Value;
007import net.sf.cpsolver.ifs.model.Variable;
008import 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 Tomáš Müller<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 */
035public 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}