Examples with Placement org.cpsolver.coursett.model.Placement used on opensource projects

Example 71 with Placement

use of org.cpsolver.coursett.model.Placement in project cpsolver by UniTime.

the class TimeChange method selectNeighbour.

@Override
public Neighbour<Lecture, Placement> selectNeighbour(Solution<Lecture, Placement> solution) {
    TimetableModel model = (TimetableModel) solution.getModel();
    Assignment<Lecture, Placement> assignment = solution.getAssignment();
    int varIdx = ToolBox.random(model.variables().size());
    for (int i = 0; i < model.variables().size(); i++) {
        Lecture lecture = model.variables().get((i + varIdx) % model.variables().size());
        Placement old = assignment.getValue(lecture);
        if (old == null)
            continue;
        List<TimeLocation> values = lecture.timeLocations();
        if (values.isEmpty())
            continue;
        int valIdx = ToolBox.random(values.size());
        for (int j = 0; j < values.size(); j++) {
            TimeLocation time = values.get((j + valIdx) % values.size());
            if (time.getPreference() > 50)
                continue;
            Placement placement = null;
            if (lecture.getNrRooms() == 0)
                placement = new Placement(lecture, time, (RoomLocation) null);
            else if (lecture.getNrRooms() == 1)
                placement = new Placement(lecture, time, old.getRoomLocation());
            else
                placement = new Placement(lecture, time, old.getRoomLocations());
            if (placement.isValid() && !model.inConflict(assignment, placement)) {
                SimpleNeighbour<Lecture, Placement> n = new SimpleNeighbour<Lecture, Placement>(lecture, placement);
                if (!iHC || n.value(assignment) <= 0)
                    return n;
            }
        }
    }
    return null;
}

Example 72 with Placement

use of org.cpsolver.coursett.model.Placement in project cpsolver by UniTime.

the class SctStudent method getJenrConflictWeight.

/**
     * Conflict weight of a lecture pair
     */
public double getJenrConflictWeight(Lecture l1, Lecture l2) {
    Placement p1 = getModel().getAssignment().getValue(l1);
    Placement p2 = getModel().getAssignment().getValue(l2);
    if (p1 == null || p2 == null)
        return 0.0;
    if (getModel().getStudentConflictCriteria() == null) {
        if (JenrlConstraint.isInConflict(p1, p2, getModel().getTimetableModel().getDistanceMetric()))
            return getStudent().getJenrlWeight(l1, l2);
        return 0.0;
    }
    double weight = 0.0;
    for (StudentConflict sc : getModel().getStudentConflictCriteria()) if (sc.isApplicable(getStudent(), p1.variable(), p2.variable()) && sc.inConflict(p1, p2))
        weight += sc.getWeight() * getStudent().getJenrlWeight(l1, l2);
    return weight;
}