    001package org.cpsolver.ifs.assignment;
    002
    003import org.cpsolver.ifs.assignment.context.InheritedAssignmentContextHolder;
    004import org.cpsolver.ifs.model.Value;
    005import org.cpsolver.ifs.model.Variable;
    006import org.cpsolver.ifs.solution.Solution;
    007
    008/**
    009 * Default inherited assignment. This assignment is based on {@link DefaultParallelAssignment} and creates
    010 * a full copy of the given assignment during its creation. This inherited assignment is slower than
    011 * {@link OptimisticInheritedAssignment}, but more reliable. Useful for small problems with a lot of constraints.
    012 *
    013 * @see InheritedAssignment
    014 *
    015 * @author  Tomáš Müller
    016 * @version IFS 1.3 (Iterative Forward Search)<br>
    017 *          Copyright (C) 2014 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 <a href='http://www.gnu.org/licenses'>http://www.gnu.org/licenses</a>.
    033 * @param <V> Variable
    034 * @param <T> Value
    035 **/
    036public class DefaultInheritedAssignment<V extends Variable<V, T>, T extends Value<V, T>> extends DefaultParallelAssignment<V, T> implements InheritedAssignment<V, T> {
    037    private Assignment<V, T> iParent;
    038    private long iVersion = -1;
    039
    040    public DefaultInheritedAssignment(Solution<V, T> parent, int index) {
    041        super(new InheritedAssignmentContextHolder<V, T>(index, parent.getIteration()), index, parent);
    042        iParent = parent.getAssignment();
    043        iVersion = parent.getIteration();
    044    }
    045
    046    @Override
    047    public Assignment<V, T> getParentAssignment() {
    048        return iParent;
    049    }
    050
    051    @Override
    052    public long getVersion() {
    053        return iVersion;
    054    }
    055}