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