    001package org.cpsolver.studentsct.heuristics;
    002
    003import org.cpsolver.ifs.assignment.Assignment;
    004import org.cpsolver.ifs.model.Value;
    005import org.cpsolver.ifs.model.Variable;
    006
    007/**
    008 * Simple interface providing an assignment check for the {@link EnrollmentSelection}.
    009 *
    010 * @author  Tomáš Müller
    011 * @version StudentSct 1.3 (Student Sectioning)<br>
    012 *          Copyright (C) 2007 - 2014 Tomáš Müller<br>
    013 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    014 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    015 * <br>
    016 *          This library is free software; you can redistribute it and/or modify
    017 *          it under the terms of the GNU Lesser General Public License as
    018 *          published by the Free Software Foundation; either version 3 of the
    019 *          License, or (at your option) any later version. <br>
    020 * <br>
    021 *          This library is distributed in the hope that it will be useful, but
    022 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    023 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    024 *          Lesser General Public License for more details. <br>
    025 * <br>
    026 *          You should have received a copy of the GNU Lesser General Public
    027 *          License along with this library; if not see
    028 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
    029 */
    030public interface AssignmentCheck<V extends Variable<V, T>, T extends Value<V, T>> {
    031
    032    /**
    033     * Check whether the given conflict can be unassigned
    034     * @param value value to be assigned
    035     * @param conflict conflicting value
    036     * @param assignment current assignment
    037     * @return true if the conflict can be unassigned due to the given value
    038     */
    039    public boolean canUnassign(T value, T conflict, Assignment<V, T> assignment);
    040
    041}