    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 * @version IFS 1.3 (Iterative Forward Search)<br>
    016 *          Copyright (C) 2014 Tomáš Müller<br>
    017 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    018 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    019 * <br>
    020 *          This library is free software; you can redistribute it and/or modify
    021 *          it under the terms of the GNU Lesser General Public License as
    022 *          published by the Free Software Foundation; either version 3 of the
    023 *          License, or (at your option) any later version. <br>
    024 * <br>
    025 *          This library is distributed in the hope that it will be useful, but
    026 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    027 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    028 *          Lesser General Public License for more details. <br>
    029 * <br>
    030 *          You should have received a copy of the GNU Lesser General Public
    031 *          License along with this library; if not see <a href='http://www.gnu.org/licenses'>http://www.gnu.org/licenses</a>.
    032 * @param <V> Variable
    033 * @param <T> Value
    034 **/
    035public class DefaultInheritedAssignment<V extends Variable<V, T>, T extends Value<V, T>> extends DefaultParallelAssignment<V, T> implements InheritedAssignment<V, T> {
    036    private Assignment<V, T> iParent;
    037    private long iVersion = -1;
    038
    039    public DefaultInheritedAssignment(Solution<V, T> parent, int index) {
    040        super(new InheritedAssignmentContextHolder<V, T>(index, parent.getIteration()), index, parent);
    041        iParent = parent.getAssignment();
    042        iVersion = parent.getIteration();
    043    }
    044
    045    @Override
    046    public Assignment<V, T> getParentAssignment() {
    047        return iParent;
    048    }
    049
    050    @Override
    051    public long getVersion() {
    052        return iVersion;
    053    }
    054}