001package org.cpsolver.coursett.preference;
002
003/**
004 * Min-max preference combination. <br>
005 * <ul>
006 * <li>If at least one preference is required &rarr; required
007 * <li>If at least one preference is prohibited &rarr; prohibited
008 * <li>If max&gt;-min &rarr; max
009 * <li>If -min&gt;max &rarr; min
010 * <li>Otherwise &rarr; 0
011 * </ul>
012 * 
013 * @version CourseTT 1.3 (University Course Timetabling)<br>
014 *          Copyright (C) 2006 - 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
030 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
031 */
032public class MinMaxPreferenceCombination extends PreferenceCombination {
033    int iPreferenceMin = 0;
034    int iPreferenceMax = 0;
035
036    @Override
037    public void addPreferenceInt(int intPref) {
038        super.addPreferenceInt(intPref);
039        iPreferenceMax = Math.max(iPreferenceMax, intPref);
040        iPreferenceMin = Math.min(iPreferenceMin, intPref);
041    }
042
043    @Override
044    public int getPreferenceInt() {
045        return (iPreferenceMax > -iPreferenceMin ? iPreferenceMax : -iPreferenceMin > iPreferenceMax ? iPreferenceMin
046                : iPreferenceMax);
047    }
048}