    001package org.cpsolver.coursett.preference;
    002
    003/**
    004 * Average 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>Otherwise, mean value from the given preferences is returned
    009 * </ul>
    010 *
    011 * @author  Tomáš Müller
    012 * @version CourseTT 1.3 (University Course Timetabling)<br>
    013 *          Copyright (C) 2006 - 2014 Tomáš Müller<br>
    014 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    015 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    016 * <br>
    017 *          This library is free software; you can redistribute it and/or modify
    018 *          it under the terms of the GNU Lesser General Public License as
    019 *          published by the Free Software Foundation; either version 3 of the
    020 *          License, or (at your option) any later version. <br>
    021 * <br>
    022 *          This library is distributed in the hope that it will be useful, but
    023 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    024 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    025 *          Lesser General Public License for more details. <br>
    026 * <br>
    027 *          You should have received a copy of the GNU Lesser General Public
    028 *          License along with this library; if not see
    029 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
    030 */
    031public class AveragePreferenceCombination extends PreferenceCombination {
    032    int iPreference = 0;
    033    int iCnt = 0;
    034
    035    public AveragePreferenceCombination() {}
    036
    037    public AveragePreferenceCombination(AveragePreferenceCombination c) {
    038        super(c);
    039        iPreference = c.iPreference;
    040        iCnt = c.iCnt;
    041    }
    042
    043    @Override
    044    public void addPreferenceInt(int intPref) {
    045        super.addPreferenceInt(intPref);
    046        iPreference += intPref;
    047        iCnt++;
    048    }
    049
    050    @Override
    051    public int getPreferenceInt() {
    052        return Math.round(((float) iPreference) / ((float) iCnt));
    053    }
    054
    055    @Override
    056    public PreferenceCombination clonePreferenceCombination() { return new AveragePreferenceCombination(this); }
    057}