001package net.sf.cpsolver.ifs.model;
002
003/**
004 * IFS neighbour.
005 * 
006 * @see net.sf.cpsolver.ifs.heuristics.NeighbourSelection
007 * 
008 * @version IFS 1.2 (Iterative Forward Search)<br>
009 *          Copyright (C) 2006 - 2010 Tomáš Müller<br>
010 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
011 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
012 * <br>
013 *          This library is free software; you can redistribute it and/or modify
014 *          it under the terms of the GNU Lesser General Public License as
015 *          published by the Free Software Foundation; either version 3 of the
016 *          License, or (at your option) any later version. <br>
017 * <br>
018 *          This library is distributed in the hope that it will be useful, but
019 *          WITHOUT ANY WARRANTY; without even the implied warranty of
020 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
021 *          Lesser General Public License for more details. <br>
022 * <br>
023 *          You should have received a copy of the GNU Lesser General Public
024 *          License along with this library; if not see
025 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
026 */
027
028public abstract class Neighbour<V extends Variable<V, T>, T extends Value<V, T>> {
029    /** Perform assignmnet */
030    public abstract void assign(long iteration);
031
032    /** Difference in the evaluation function, if this neighnour is assigned. */
033    public abstract double value();
034}