001    package net.sf.cpsolver.studentsct.filter;
002    
003    import net.sf.cpsolver.studentsct.model.Student;
004    
005    /**
006     * This student filter accepts students that are not accepted by the provided student filter.  
007     * 
008     * @version
009     * StudentSct 1.1 (Student Sectioning)<br>
010     * Copyright (C) 2007 Tomáš Müller<br>
011     * <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
012     * Lazenska 391, 76314 Zlin, Czech Republic<br>
013     * <br>
014     * This library is free software; you can redistribute it and/or
015     * modify it under the terms of the GNU Lesser General Public
016     * License as published by the Free Software Foundation; either
017     * version 2.1 of the License, or (at your option) any later version.
018     * <br><br>
019     * This library is distributed in the hope that it will be useful,
020     * but WITHOUT ANY WARRANTY; without even the implied warranty of
021     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
022     * Lesser General Public License for more details.
023     * <br><br>
024     * You should have received a copy of the GNU Lesser General Public
025     * License along with this library; if not, write to the Free Software
026     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
027     */
028    
029    public class ReverseStudentFilter implements StudentFilter {
030        private StudentFilter iFilter = null;
031    
032        /**
033         * Constructor
034         * @param filter student filter that is to be reversed
035         */
036        public ReverseStudentFilter(StudentFilter filter) {
037            iFilter = filter;
038        }
039        
040        /** 
041         * Accept student. Student is accepted if the provided student filter refuses him/her.
042         **/
043        public boolean accept(Student student) {
044            return (iFilter==null?false:!iFilter.accept(student));
045        }
046    
047    }