    001package org.cpsolver.ifs.criteria;
    002
    003import java.util.Set;
    004
    005import org.cpsolver.ifs.assignment.Assignment;
    006import org.cpsolver.ifs.model.Model;
    007import org.cpsolver.ifs.model.Value;
    008import org.cpsolver.ifs.model.Variable;
    009import org.cpsolver.ifs.util.DataProperties;
    010
    011
    012/**
    013 * Simple Criterion: Sum of {@link Value#toDouble(Assignment)}. <br>
    014 * <br>
    015 * This criterion only counts a sum of values (see {@link Value#toDouble(Assignment)}) of the assigned variables.
    016 * It is an alternative to the default {@link Model#getTotalValue(Assignment)}.
    017 *
    018 * @author  Tomáš Müller
    019 * @version IFS 1.3 (Iterative Forward Search)<br>
    020 *          Copyright (C) 2006 - 2014 Tomáš Müller<br>
    021 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    022 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    023 * <br>
    024 *          This library is free software; you can redistribute it and/or modify
    025 *          it under the terms of the GNU Lesser General Public License as
    026 *          published by the Free Software Foundation; either version 3 of the
    027 *          License, or (at your option) any later version. <br>
    028 * <br>
    029 *          This library is distributed in the hope that it will be useful, but
    030 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    031 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    032 *          Lesser General Public License for more details. <br>
    033 * <br>
    034 *          You should have received a copy of the GNU Lesser General Public
    035 *          License along with this library; if not see
    036 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
    037 * @param <V> Variable
    038 * @param <T> Value
    039 */
    040public class AssignedValue<V extends Variable<V, T>, T extends Value<V, T>> extends AbstractCriterion<V, T>{
    041
    042    @Override
    043    public double getWeightDefault(DataProperties config) {
    044        return 1.0;
    045    }
    046
    047    @Override
    048    public double getValue(Assignment<V, T> assignment, T value, Set<T> conflicts) {
    049        double ret = value.toDouble(assignment);
    050        if (conflicts != null)
    051            for (T conflict: conflicts)
    052                ret -= conflict.toDouble(assignment);
    053        return ret;
    054    }
    055
    056}