    001package org.cpsolver.studentsct.filter;
    002
    003import org.cpsolver.studentsct.model.Student;
    004
    005/**
    006 * This student filter accepts students that are not accepted by the provided
    007 * student filter.
    008 *
    009 * @author  Tomáš Müller
    010 * @version StudentSct 1.3 (Student Sectioning)<br>
    011 *          Copyright (C) 2007 - 2014 Tomáš Müller<br>
    012 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    013 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    014 * <br>
    015 *          This library is free software; you can redistribute it and/or modify
    016 *          it under the terms of the GNU Lesser General Public License as
    017 *          published by the Free Software Foundation; either version 3 of the
    018 *          License, or (at your option) any later version. <br>
    019 * <br>
    020 *          This library is distributed in the hope that it will be useful, but
    021 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    022 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    023 *          Lesser General Public License for more details. <br>
    024 * <br>
    025 *          You should have received a copy of the GNU Lesser General Public
    026 *          License along with this library; if not see
    027 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
    028 */
    029
    030public class ReverseStudentFilter implements StudentFilter {
    031    private StudentFilter iFilter = null;
    032
    033    /**
    034     * Constructor
    035     *
    036     * @param filter
    037     *            student filter that is to be reversed
    038     */
    039    public ReverseStudentFilter(StudentFilter filter) {
    040        iFilter = filter;
    041    }
    042
    043    /**
    044     * Accept student. Student is accepted if the provided student filter
    045     * refuses him/her.
    046     **/
    047    @Override
    048    public boolean accept(Student student) {
    049        return (iFilter == null ? false : !iFilter.accept(student));
    050    }
    051
    052    @Override
    053    public String getName() {
    054        return "NOT " + iFilter.getName();
    055    }
    056
    057}