001 package net.sf.cpsolver.studentsct.filter;
002
003 import net.sf.cpsolver.studentsct.model.Student;
004
005 /**
006 * This student filter combines two given student filters with logical operation
007 * AND or OR.
008 *
009 * @version StudentSct 1.2 (Student Sectioning)<br>
010 * Copyright (C) 2007 - 2010 Tomas Muller<br>
011 * <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
012 * <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
013 * <br>
014 * This library is free software; you can redistribute it and/or modify
015 * it under the terms of the GNU Lesser General Public License as
016 * published by the Free Software Foundation; either version 3 of the
017 * License, or (at your option) any later version. <br>
018 * <br>
019 * This library is distributed in the hope that it will be useful, but
020 * 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. <br>
023 * <br>
024 * You should have received a copy of the GNU Lesser General Public
025 * License along with this library; if not see
026 * <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
027 */
028 public class CombinedStudentFilter implements StudentFilter {
029 /** AND */
030 public static final int OP_AND = 0;
031 /** OR */
032 public static final int OP_OR = 1;
033 private StudentFilter iFirst, iSecond;
034 private int iOp;
035
036 /**
037 * Constructor
038 *
039 * @param first
040 * first filter
041 * @param second
042 * second filter
043 * @param op
044 * logical operation (either {@link CombinedStudentFilter#OP_AND}
045 * or {@link CombinedStudentFilter#OP_OR} )
046 */
047 public CombinedStudentFilter(StudentFilter first, StudentFilter second, int op) {
048 iFirst = first;
049 iSecond = second;
050 iOp = op;
051 }
052
053 /**
054 * A student is accepted if it is accepted by the first and/or the second
055 * filter
056 */
057 @Override
058 public boolean accept(Student student) {
059 switch (iOp) {
060 case OP_OR:
061 return iFirst.accept(student) || iSecond.accept(student);
062 case OP_AND:
063 default:
064 return iFirst.accept(student) && iSecond.accept(student);
065 }
066 }
067
068 }