    001package org.cpsolver.instructor.criteria;
    002
    003import java.util.Collection;
    004import java.util.Map;
    005import java.util.Set;
    006
    007import org.cpsolver.ifs.assignment.Assignment;
    008import org.cpsolver.ifs.util.DataProperties;
    009import org.cpsolver.instructor.model.Instructor;
    010import org.cpsolver.instructor.model.InstructorSchedulingModel;
    011import org.cpsolver.instructor.model.TeachingAssignment;
    012import org.cpsolver.instructor.model.TeachingRequest;
    013
    014/**
    015 * Different Lecture. If an instructor is teaching two or more assignments of the same course, this criterion counts cases when these
    016 * assignments do not share a common part (e.g., have a different lecture, counting {@link Instructor#differentLectures(Assignment, TeachingAssignment)}).
    017 *
    018 * @author  Tomáš Müller
    019 * @version IFS 1.3 (Instructor Sectioning)<br>
    020 *          Copyright (C) 2016 Tomáš Müller<br>
    021 *          <a href="mailto:muller@unitime.org">muller@unitime.org</a><br>
    022 *          <a href="http://muller.unitime.org">http://muller.unitime.org</a><br>
    023 * <br>
    024 *          This library is free software; you can redistribute it and/or modify
    025 *          it under the terms of the GNU Lesser General Public License as
    026 *          published by the Free Software Foundation; either version 3 of the
    027 *          License, or (at your option) any later version. <br>
    028 * <br>
    029 *          This library is distributed in the hope that it will be useful, but
    030 *          WITHOUT ANY WARRANTY; without even the implied warranty of
    031 *          MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    032 *          Lesser General Public License for more details. <br>
    033 * <br>
    034 *          You should have received a copy of the GNU Lesser General Public
    035 *          License along with this library; if not see
    036 *          <a href='http://www.gnu.org/licenses/'>http://www.gnu.org/licenses/</a>.
    037 */
    038public class DifferentLecture extends InstructorSchedulingCriterion {
    039
    040    public DifferentLecture() {
    041        setValueUpdateType(ValueUpdateType.NoUpdate);
    042    }
    043
    044    @Override
    045    public double getWeightDefault(DataProperties config) {
    046        return 1000.0;
    047    }
    048
    049    @Override
    050    public double getValue(Assignment<TeachingRequest.Variable, TeachingAssignment> assignment, TeachingAssignment value, Set<TeachingAssignment> conflicts) {
    051        return value.getInstructor().differentLectures(assignment, value);
    052    }
    053
    054    @Override
    055    public double getValue(Assignment<TeachingRequest.Variable, TeachingAssignment> assignment, Collection<TeachingRequest.Variable> variables) {
    056        double value = 0.0;
    057        for (Instructor instructor: getAssignedInstructors(assignment, variables)) {
    058            value += instructor.getContext(assignment).countDifferentLectures();
    059        }
    060        return value;
    061    }
    062
    063    @Override
    064    protected double[] computeBounds(Assignment<TeachingRequest.Variable, TeachingAssignment> assignment) {
    065        return new double[] { 0.0, ((InstructorSchedulingModel)getModel()).getInstructors().size() };
    066    }
    067
    068    @Override
    069    public double[] getBounds(Assignment<TeachingRequest.Variable, TeachingAssignment> assignment, Collection<TeachingRequest.Variable> variables) {
    070        return new double[] { 0.0, getInstructors(assignment, variables).size() };
    071    }
    072
    073    @Override
    074    public String getAbbreviation() {
    075        return "DiffLecture";
    076    }
    077
    078    @Override
    079    public void getInfo(Assignment<TeachingRequest.Variable, TeachingAssignment> assignment, Map<String, String> info) {
    080        double val = getValue(assignment);
    081        double[] bounds = getBounds(assignment);
    082        if (bounds[0] <= val && val <= bounds[1] && bounds[0] < bounds[1])
    083            info.put("Same Lecture", getPerc(val, bounds[0], bounds[1]) + "% (" + sDoubleFormat.format(bounds[1] - val) + ")");
    084    }
    085
    086    @Override
    087    public void getInfo(Assignment<TeachingRequest.Variable, TeachingAssignment> assignment, Map<String, String> info, Collection<TeachingRequest.Variable> variables) {
    088        double val = getValue(assignment, variables);
    089        double[] bounds = getBounds(assignment, variables);
    090        if (bounds[0] <= val && val <= bounds[1] && bounds[0] < bounds[1])
    091            info.put("Same Lecture", getPerc(val, bounds[0], bounds[1]) + "% (" + sDoubleFormat.format(bounds[1] - val) + ")");
    092    }
    093}