package org.cpsolver.instructor.criteria;

import java.util.Set;

import org.cpsolver.ifs.assignment.Assignment;
import org.cpsolver.ifs.util.DataProperties;
import org.cpsolver.instructor.model.Instructor;
import org.cpsolver.instructor.model.TeachingAssignment;
import org.cpsolver.instructor.model.TeachingRequest;

/**
 * Course Preferences. This criterion counts how well are the course preferences that are set on an {@link Instructor} met
 * (counting {@link TeachingAssignment#getCoursePreference()}).
 * 
 * @version IFS 1.3 (Instructor Sectioning)<br>
 *          Copyright (C) 2016 Tomas Muller<br>
 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
 * <br>
 *          This library is free software; you can redistribute it and/or modify
 *          it under the terms of the GNU Lesser General Public License as
 *          published by the Free Software Foundation; either version 3 of the
 *          License, or (at your option) any later version. <br>
 * <br>
 *          This library is distributed in the hope that it will be useful, but
 *          WITHOUT ANY WARRANTY; without even the implied warranty of
 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *          Lesser General Public License for more details. <br>
 * <br>
 *          You should have received a copy of the GNU Lesser General Public
 *          License along with this library; if not see
 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
 */
public class CoursePreferences extends InstructorSchedulingCriterion {

    @Override
    public double getWeightDefault(DataProperties config) {
        return 0.1;
    }

    @Override
    public double getValue(Assignment<TeachingRequest.Variable, TeachingAssignment> assignment, TeachingAssignment value, Set<TeachingAssignment> conflicts) {
        return value.getCoursePreference();
    }

    @Override
    public String getAbbreviation() {
        return "CoursePref";
    }
}
