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}