001package org.cpsolver.ifs.assignment;
002
003import java.util.Comparator;
004
005import org.cpsolver.ifs.model.Value;
006import org.cpsolver.ifs.model.Variable;
007
008
009/**
010 * Comparator for the {@link AssignmentComparable} objects.
011 * 
012 * 
013 * @author  Tomáš Müller
014 * @version IFS 1.3 (Iterative Forward Search)<br>
015 *          Copyright (C) 2014 Tomáš Müller<br>
016 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
017 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
018 * <br>
019 *          This library is free software; you can redistribute it and/or modify
020 *          it under the terms of the GNU Lesser General Public License as
021 *          published by the Free Software Foundation; either version 3 of the
022 *          License, or (at your option) any later version. <br>
023 * <br>
024 *          This library is distributed in the hope that it will be useful, but
025 *          WITHOUT ANY WARRANTY; without even the implied warranty of
026 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
027 *          Lesser General Public License for more details. <br>
028 * <br>
029 *          You should have received a copy of the GNU Lesser General Public
030 *          License along with this library; if not see <a href='http://www.gnu.org/licenses'>http://www.gnu.org/licenses</a>.
031 * @param <X> A class implementing {@link AssignmentComparable}
032 * @param <V> Variable
033 * @param <T> Value
034 **/
035public class AssignmentComparator<X extends AssignmentComparable<X, V, T>, V extends Variable<V, T>, T extends Value<V, T>> implements Comparator<X> {
036    protected Assignment<V, T> iAssignment;
037    
038    /**
039     * Create comparator with the given assignment.
040     * @param assignment current assignment
041     */
042    public AssignmentComparator(Assignment<V, T> assignment) {
043        iAssignment = assignment;
044    }
045
046    @Override
047    public int compare(X o1, X o2) {
048        return o1.compareTo(iAssignment, o2);
049    }
050
051}