Examples with Exam org.cpsolver.exam.model.Exam used on opensource projects

Example 51 with Exam

use of org.cpsolver.exam.model.Exam in project cpsolver by UniTime.

the class StudentMoreThan1ADayConflicts method getValue.

@Override
public double getValue(Assignment<Exam, ExamPlacement> assignment, Collection<Exam> variables) {
    int ret = 0;
    ExamModel m = (ExamModel) getModel();
    Set<Integer> days = new HashSet<Integer>();
    for (ExamPeriod p : m.getPeriods()) {
        if (days.add(p.getDay())) {
            Map<ExamStudent, Set<Exam>> students = ((ExamModel) getModel()).getStudentsOfDay(assignment, p);
            for (Set<Exam> exams : students.values()) {
                int nrExams = exams.size();
                if (nrExams > 1)
                    ret += nrExams - 1;
            }
        }
    }
    return ret;
}

Example 52 with Exam

use of org.cpsolver.exam.model.Exam in project cpsolver by UniTime.

the class ExamHillClimbing method selectNeighbour.

/**
 * Select one of the given neighbourhoods randomly, select neighbour, return
 * it if its value is below or equal to zero (continue with the next
 * selection otherwise). Return null when the given number of idle
 * iterations is reached.
 */
@Override
public Neighbour<Exam, ExamPlacement> selectNeighbour(Solution<Exam, ExamPlacement> solution) {
    Context context = getContext(solution.getAssignment());
    context.activateIfNeeded();
    while (true) {
        if (context.incIter(solution))
            break;
        NeighbourSelection<Exam, ExamPlacement> ns = iNeighbours.get(ToolBox.random(iNeighbours.size()));
        Neighbour<Exam, ExamPlacement> n = ns.selectNeighbour(solution);
        if (n != null) {
            if (n instanceof LazyNeighbour) {
                ((LazyNeighbour<Exam, ExamPlacement>) n).setAcceptanceCriterion(this);
                return n;
            } else if (n.value(solution.getAssignment()) <= 0.0)
                return n;
        }
    }
    context.reset();
    return null;
}

Example 53 with Exam

use of org.cpsolver.exam.model.Exam in project cpsolver by UniTime.

the class ExamUnassignedVariableSelection method selectVariable.

/**
 * Variable selection
 */
@Override
public Exam selectVariable(Solution<Exam, ExamPlacement> solution) {
    ExamModel model = (ExamModel) solution.getModel();
    Assignment<Exam, ExamPlacement> assignment = solution.getAssignment();
    if (model.variables().size() == assignment.nrAssignedVariables())
        return null;
    if (iRandomSelection) {
        int idx = ToolBox.random(model.variables().size() - assignment.nrAssignedVariables());
        for (Exam v : model.variables()) {
            if (assignment.getValue(v) != null)
                continue;
            if (idx == 0)
                return v;
            idx--;
        }
    }
    Exam variable = null;
    for (Exam v : model.variables()) {
        if (assignment.getValue(v) != null)
            continue;
        if (variable == null || v.compareTo(variable) < 0)
            variable = v;
    }
    return variable;
}

Example 54 with Exam

use of org.cpsolver.exam.model.Exam in project cpsolver by UniTime.

the class MistaTables method main.

public static void main(String[] args) {
    try {
        ToolBox.configureLogging();
        DataProperties config = new DataProperties();
        Table[] tables = new Table[] { new Problems(), new Rooms() };
        for (int i = 0; i < args.length; i++) {
            File file = new File(args[i]);
            sLog.info("Loading " + file);
            ExamModel model = new ExamModel(config);
            Assignment<Exam, ExamPlacement> assignment = new DefaultSingleAssignment<Exam, ExamPlacement>();
            model.load(new SAXReader().read(file), assignment);
            String name = file.getName();
            if (name.contains("."))
                name = name.substring(0, name.indexOf('.'));
            for (Table table : tables) table.add(name, model);
            Progress.removeInstance(model);
        }
        sLog.info("Saving tables...");
        File output = new File("tables");
        output.mkdir();
        for (Table table : tables) table.save(output);
        sLog.info("All done.");
    } catch (Exception e) {
        sLog.error(e.getMessage(), e);
    }
}

Example 55 with Exam

use of org.cpsolver.exam.model.Exam in project cpsolver by UniTime.

the class DistributionPenalty method getValue.

@Override
public double getValue(Assignment<Exam, ExamPlacement> assignment, Collection<Exam> variables) {
    int penalty = 0;
    Set<ExamDistributionConstraint> added = new HashSet<ExamDistributionConstraint>();
    for (Exam exam : variables) {
        for (ExamDistributionConstraint dc : exam.getDistributionConstraints()) {
            if (added.add(dc)) {
                if (dc.isHard() || (iSoftDistributions != null && iSoftDistributions == dc.getWeight()))
                    continue;
                if (!dc.isSatisfied(assignment))
                    penalty += dc.getWeight();
            }
        }
    }
    return penalty;
}