    001package org.cpsolver.studentsct.online.expectations;
    002
    003import org.cpsolver.ifs.assignment.Assignment;
    004import org.cpsolver.ifs.util.DataProperties;
    005import org.cpsolver.studentsct.model.Enrollment;
    006import org.cpsolver.studentsct.model.Request;
    007import org.cpsolver.studentsct.model.Section;
    008
    009/**
    010 * Class is over-expected when {@link Section#getPenalty()} is not negative.
    011 *
    012 * @author  Tomáš Müller
    013 * @version StudentSct 1.3 (Student Sectioning)<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
    030 *          href='http://www.gnu.org/licenses'>http://www.gnu.org/licenses</a>.
    031 *
    032 */
    033public class PenaltyNotNegative implements OverExpectedCriterion {
    034
    035    public PenaltyNotNegative(DataProperties config) {
    036    }
    037
    038    @Override
    039    public double getOverExpected(Assignment<Request, Enrollment> assignment, Section section, Request request) {
    040        if (section.getPenalty() < 0 || section.getLimit() <= 0.0)
    041            return 0.0;
    042        int subparts = section.getSubpart().getConfig().getSubparts().size();
    043        return 1.0 / subparts;
    044    }
    045
    046    @Override
    047    public String toString() {
    048        return "not-negative";
    049    }
    050
    051    @Override
    052    public Integer getExpected(int sectionLimit, double expectedSpace) {
    053        if (sectionLimit <= 0.0)
    054            return null;
    055
    056        int expected = (int) Math.round(expectedSpace);
    057        if (expected > 0)
    058            return expected;
    059
    060        return null;
    061    }
    062}