Examples with CourseRequest org.cpsolver.studentsct.model.CourseRequest used on opensource projects

Example 61 with CourseRequest

use of org.cpsolver.studentsct.model.CourseRequest in project cpsolver by UniTime.

the class MultiCriteriaBranchAndBoundSelection method backTrack.

/**
 * branch & bound search
 */
public void backTrack(int idx) {
    if (iTimeout > 0 && (JProf.currentTimeMillis() - iT0) > iTimeout) {
        iTimeoutReached = true;
        return;
    }
    if (idx == iCurrentAssignment.length) {
        if (iBestAssignment == null || iComparator.compare(iAssignment, iCurrentAssignment, iBestAssignment) < 0)
            saveBest();
        return;
    } else if (iBestAssignment != null && !iComparator.canImprove(iAssignment, idx, iCurrentAssignment, iBestAssignment)) {
        return;
    }
    Request request = iStudent.getRequests().get(idx);
    if (!canAssign(request, idx)) {
        backTrack(idx + 1);
        return;
    }
    List<Enrollment> values = null;
    if (request instanceof CourseRequest) {
        CourseRequest courseRequest = (CourseRequest) request;
        if (!courseRequest.getSelectedChoices().isEmpty()) {
            values = courseRequest.getSelectedEnrollments(iAssignment, true);
            if (values != null && !values.isEmpty()) {
                boolean hasNoConflictValue = false;
                for (Enrollment enrollment : values) {
                    if (inConflict(idx, enrollment))
                        continue;
                    hasNoConflictValue = true;
                    iCurrentAssignment[idx] = enrollment;
                    backTrack(idx + 1);
                    iCurrentAssignment[idx] = null;
                }
                if (hasNoConflictValue && iBranchWhenSelectedHasNoConflict)
                    return;
            }
        }
        values = iValues.get(courseRequest);
        if (values == null) {
            values = values(courseRequest);
            iValues.put(courseRequest, values);
        }
    } else {
        values = request.computeEnrollments(iAssignment);
    }
    boolean hasNoConflictValue = false;
    for (Enrollment enrollment : values) {
        if (inConflict(idx, enrollment))
            continue;
        hasNoConflictValue = true;
        iCurrentAssignment[idx] = enrollment;
        backTrack(idx + 1);
        iCurrentAssignment[idx] = null;
    }
    if (canLeaveUnassigned(request) || (!hasNoConflictValue && request instanceof CourseRequest))
        backTrack(idx + 1);
}

Example 62 with CourseRequest

use of org.cpsolver.studentsct.model.CourseRequest in project cpsolver by UniTime.

the class SuggestionSelection method setRequiredSections.

@Override
public void setRequiredSections(Hashtable<CourseRequest, Set<Section>> requiredSections) {
    iRequiredConfig = new Hashtable<CourseRequest, Config>();
    iRequiredSection = new Hashtable<CourseRequest, Hashtable<Subpart, Section>>();
    if (requiredSections != null) {
        for (Map.Entry<CourseRequest, Set<Section>> entry : requiredSections.entrySet()) {
            Hashtable<Subpart, Section> subSection = new Hashtable<Subpart, Section>();
            iRequiredSection.put(entry.getKey(), subSection);
            for (Section section : entry.getValue()) {
                if (subSection.isEmpty())
                    iRequiredConfig.put(entry.getKey(), section.getSubpart().getConfig());
                subSection.put(section.getSubpart(), section);
            }
        }
    }
}

Example 63 with CourseRequest

use of org.cpsolver.studentsct.model.CourseRequest in project cpsolver by UniTime.

the class SuggestionsBranchAndBound method computeSuggestions.

/**
 * Perform the search
 * @return an ordered set of possible suggestions
 */
public TreeSet<Suggestion> computeSuggestions() {
    iT0 = System.currentTimeMillis();
    iTimeoutReached = false;
    iNrSolutionsSeen = 0;
    iSuggestions.clear();
    ArrayList<Request> requests2resolve = new ArrayList<Request>();
    requests2resolve.add(iSelectedRequest);
    TreeSet<Request> altRequests2resolve = new TreeSet<Request>();
    for (Map.Entry<CourseRequest, Set<Section>> entry : iPreferredSections.entrySet()) {
        CourseRequest request = entry.getKey();
        Set<Section> sections = entry.getValue();
        if (!sections.isEmpty() && sections.size() == sections.iterator().next().getSubpart().getConfig().getSubparts().size())
            iAssignment.assign(0, request.createEnrollment(iAssignment, sections));
        else if (!request.equals(iSelectedRequest)) {
            if (sections.isEmpty())
                altRequests2resolve.add(request);
            else
                requests2resolve.add(request);
        }
    }
    for (Request request : iStudent.getRequests()) {
        if (iAssignment.getValue(request) == null && request instanceof FreeTimeRequest) {
            FreeTimeRequest ft = (FreeTimeRequest) request;
            Enrollment enrollment = ft.createEnrollment();
            if (iModel.conflictValues(iAssignment, enrollment).isEmpty())
                iAssignment.assign(0, enrollment);
        }
    }
    for (Request request : iStudent.getRequests()) {
        request.setInitialAssignment(iAssignment.getValue(request));
    }
    backtrack(requests2resolve, altRequests2resolve, 0, iMaxDepth, false);
    iT1 = System.currentTimeMillis();
    return iSuggestions;
}

Example 64 with CourseRequest

use of org.cpsolver.studentsct.model.CourseRequest in project cpsolver by UniTime.

the class Test method updateSpace.

public static void updateSpace(Assignment<Request, Enrollment> assignment, Enrollment enrollment, boolean increment) {
    if (enrollment == null || !enrollment.isCourseRequest())
        return;
    for (Section section : enrollment.getSections()) section.setSpaceHeld(section.getSpaceHeld() + (increment ? 1.0 : -1.0));
    List<Enrollment> feasibleEnrollments = new ArrayList<Enrollment>();
    int totalLimit = 0;
    for (Enrollment enrl : enrollment.getRequest().values(assignment)) {
        if (!enrl.getCourse().equals(enrollment.getCourse()))
            continue;
        boolean overlaps = false;
        for (Request otherRequest : enrollment.getRequest().getStudent().getRequests()) {
            if (otherRequest.equals(enrollment.getRequest()) || !(otherRequest instanceof CourseRequest))
                continue;
            Enrollment otherErollment = assignment.getValue(otherRequest);
            if (otherErollment == null)
                continue;
            if (enrl.isOverlapping(otherErollment)) {
                overlaps = true;
                break;
            }
        }
        if (!overlaps) {
            feasibleEnrollments.add(enrl);
            if (totalLimit >= 0) {
                int limit = enrl.getLimit();
                if (limit < 0)
                    totalLimit = -1;
                else
                    totalLimit += limit;
            }
        }
    }
    double change = enrollment.getRequest().getWeight() / (totalLimit > 0 ? totalLimit : feasibleEnrollments.size());
    for (Enrollment feasibleEnrollment : feasibleEnrollments) for (Section section : feasibleEnrollment.getSections()) {
        if (totalLimit > 0) {
            section.setSpaceExpected(section.getSpaceExpected() + (increment ? +change : -change) * feasibleEnrollment.getLimit());
        } else {
            section.setSpaceExpected(section.getSpaceExpected() + (increment ? +change : -change));
        }
    }
}

Example 65 with CourseRequest

use of org.cpsolver.studentsct.model.CourseRequest in project cpsolver by UniTime.

the class PriorityStudentWeights method main.

/**
 * Test case -- run to see the weights for a few courses
 * @param args program arguments
 */
public static void main(String[] args) {
    PriorityStudentWeights pw = new PriorityStudentWeights(new DataProperties());
    DecimalFormat df = new DecimalFormat("0.000000");
    Student s = new Student(0l);
    new CourseRequest(1l, 0, false, s, ToolBox.toList(new Course(1, "A", "1", new Offering(0, "A")), new Course(1, "A", "2", new Offering(0, "A")), new Course(1, "A", "3", new Offering(0, "A"))), false, null);
    new CourseRequest(2l, 1, false, s, ToolBox.toList(new Course(1, "B", "1", new Offering(0, "B")), new Course(1, "B", "2", new Offering(0, "B")), new Course(1, "B", "3", new Offering(0, "B"))), false, null);
    new CourseRequest(3l, 2, false, s, ToolBox.toList(new Course(1, "C", "1", new Offering(0, "C")), new Course(1, "C", "2", new Offering(0, "C")), new Course(1, "C", "3", new Offering(0, "C"))), false, null);
    new CourseRequest(4l, 3, false, s, ToolBox.toList(new Course(1, "D", "1", new Offering(0, "D")), new Course(1, "D", "2", new Offering(0, "D")), new Course(1, "D", "3", new Offering(0, "D"))), false, null);
    new CourseRequest(5l, 4, false, s, ToolBox.toList(new Course(1, "E", "1", new Offering(0, "E")), new Course(1, "E", "2", new Offering(0, "E")), new Course(1, "E", "3", new Offering(0, "E"))), false, null);
    new CourseRequest(6l, 5, true, s, ToolBox.toList(new Course(1, "F", "1", new Offering(0, "F")), new Course(1, "F", "2", new Offering(0, "F")), new Course(1, "F", "3", new Offering(0, "F"))), false, null);
    new CourseRequest(7l, 6, true, s, ToolBox.toList(new Course(1, "G", "1", new Offering(0, "G")), new Course(1, "G", "2", new Offering(0, "G")), new Course(1, "G", "3", new Offering(0, "G"))), false, null);
    Assignment<Request, Enrollment> assignment = new DefaultSingleAssignment<Request, Enrollment>();
    Placement p = new Placement(null, new TimeLocation(1, 90, 12, 0, 0, null, null, new BitSet(), 10), new ArrayList<RoomLocation>());
    for (Request r : s.getRequests()) {
        CourseRequest cr = (CourseRequest) r;
        double[] w = new double[] { 0.0, 0.0, 0.0 };
        for (int i = 0; i < cr.getCourses().size(); i++) {
            Config cfg = new Config(0l, -1, "", cr.getCourses().get(i).getOffering());
            Set<SctAssignment> sections = new HashSet<SctAssignment>();
            sections.add(new Section(0, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null));
            Enrollment e = new Enrollment(cr, i, cfg, sections, assignment);
            w[i] = pw.getWeight(assignment, e, null, null);
        }
        System.out.println(cr + ": " + df.format(w[0]) + "  " + df.format(w[1]) + "  " + df.format(w[2]));
    }
    System.out.println("With one distance conflict:");
    for (Request r : s.getRequests()) {
        CourseRequest cr = (CourseRequest) r;
        double[] w = new double[] { 0.0, 0.0, 0.0 };
        for (int i = 0; i < cr.getCourses().size(); i++) {
            Config cfg = new Config(0l, -1, "", cr.getCourses().get(i).getOffering());
            Set<SctAssignment> sections = new HashSet<SctAssignment>();
            sections.add(new Section(0, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null));
            Enrollment e = new Enrollment(cr, i, cfg, sections, assignment);
            Set<DistanceConflict.Conflict> dc = new HashSet<DistanceConflict.Conflict>();
            dc.add(new DistanceConflict.Conflict(s, e, (Section) sections.iterator().next(), e, (Section) sections.iterator().next()));
            w[i] = pw.getWeight(assignment, e, dc, null);
        }
        System.out.println(cr + ": " + df.format(w[0]) + "  " + df.format(w[1]) + "  " + df.format(w[2]));
    }
    System.out.println("With two distance conflicts:");
    for (Request r : s.getRequests()) {
        CourseRequest cr = (CourseRequest) r;
        double[] w = new double[] { 0.0, 0.0, 0.0 };
        for (int i = 0; i < cr.getCourses().size(); i++) {
            Config cfg = new Config(0l, -1, "", cr.getCourses().get(i).getOffering());
            Set<SctAssignment> sections = new HashSet<SctAssignment>();
            sections.add(new Section(0, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null));
            Enrollment e = new Enrollment(cr, i, cfg, sections, assignment);
            Set<DistanceConflict.Conflict> dc = new HashSet<DistanceConflict.Conflict>();
            dc.add(new DistanceConflict.Conflict(s, e, (Section) sections.iterator().next(), e, (Section) sections.iterator().next()));
            dc.add(new DistanceConflict.Conflict(s, e, (Section) sections.iterator().next(), e, new Section(1, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null)));
            w[i] = pw.getWeight(assignment, e, dc, null);
        }
        System.out.println(cr + ": " + df.format(w[0]) + "  " + df.format(w[1]) + "  " + df.format(w[2]));
    }
    System.out.println("With 25% time overlapping conflict:");
    for (Request r : s.getRequests()) {
        CourseRequest cr = (CourseRequest) r;
        double[] w = new double[] { 0.0, 0.0, 0.0 };
        for (int i = 0; i < cr.getCourses().size(); i++) {
            Config cfg = new Config(0l, -1, "", cr.getCourses().get(i).getOffering());
            Set<SctAssignment> sections = new HashSet<SctAssignment>();
            sections.add(new Section(0, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null));
            Enrollment e = new Enrollment(cr, i, cfg, sections, assignment);
            Set<TimeOverlapsCounter.Conflict> toc = new HashSet<TimeOverlapsCounter.Conflict>();
            toc.add(new TimeOverlapsCounter.Conflict(s, 3, e, sections.iterator().next(), e, sections.iterator().next()));
            w[i] = pw.getWeight(assignment, e, null, toc);
        }
        System.out.println(cr + ": " + df.format(w[0]) + "  " + df.format(w[1]) + "  " + df.format(w[2]));
    }
    System.out.println("Disbalanced sections (by 2 / 10 students):");
    for (Request r : s.getRequests()) {
        CourseRequest cr = (CourseRequest) r;
        double[] w = new double[] { 0.0, 0.0, 0.0 };
        for (int i = 0; i < cr.getCourses().size(); i++) {
            Config cfg = new Config(0l, -1, "", cr.getCourses().get(i).getOffering());
            Set<SctAssignment> sections = new HashSet<SctAssignment>();
            Subpart x = new Subpart(0, "Lec", "Lec", cfg, null);
            Section a = new Section(0, 10, "x", x, p, null);
            new Section(1, 10, "y", x, p, null);
            sections.add(a);
            a.assigned(assignment, new Enrollment(s.getRequests().get(0), i, cfg, sections, assignment));
            a.assigned(assignment, new Enrollment(s.getRequests().get(0), i, cfg, sections, assignment));
            cfg.getContext(assignment).assigned(assignment, new Enrollment(s.getRequests().get(0), i, cfg, sections, assignment));
            cfg.getContext(assignment).assigned(assignment, new Enrollment(s.getRequests().get(0), i, cfg, sections, assignment));
            Enrollment e = new Enrollment(cr, i, cfg, sections, assignment);
            w[i] = pw.getWeight(assignment, e, null, null);
        }
        System.out.println(cr + ": " + df.format(w[0]) + "  " + df.format(w[1]) + "  " + df.format(w[2]));
    }
    System.out.println("Same choice sections:");
    pw.iMPP = true;
    for (Request r : s.getRequests()) {
        CourseRequest cr = (CourseRequest) r;
        double[] w = new double[] { 0.0, 0.0, 0.0 };
        for (int i = 0; i < cr.getCourses().size(); i++) {
            Config cfg = new Config(0l, -1, "", cr.getCourses().get(i).getOffering());
            Set<SctAssignment> sections = new HashSet<SctAssignment>();
            sections.add(new Section(0, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null));
            Enrollment e = new Enrollment(cr, i, cfg, sections, assignment);
            Set<SctAssignment> other = new HashSet<SctAssignment>();
            other.add(new Section(1, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null));
            cr.setInitialAssignment(new Enrollment(cr, i, cfg, other, assignment));
            w[i] = pw.getWeight(assignment, e, null, null);
        }
        System.out.println(cr + ": " + df.format(w[0]) + "  " + df.format(w[1]) + "  " + df.format(w[2]));
    }
    System.out.println("Same time sections:");
    for (Request r : s.getRequests()) {
        CourseRequest cr = (CourseRequest) r;
        double[] w = new double[] { 0.0, 0.0, 0.0 };
        for (int i = 0; i < cr.getCourses().size(); i++) {
            Config cfg = new Config(0l, -1, "", cr.getCourses().get(i).getOffering());
            Set<SctAssignment> sections = new HashSet<SctAssignment>();
            sections.add(new Section(0, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null));
            Enrollment e = new Enrollment(cr, i, cfg, sections, assignment);
            Set<SctAssignment> other = new HashSet<SctAssignment>();
            other.add(new Section(1, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null, new Instructor(1l, null, "Josef Novak", null)));
            cr.setInitialAssignment(new Enrollment(cr, i, cfg, other, assignment));
            w[i] = pw.getWeight(assignment, e, null, null);
        }
        System.out.println(cr + ": " + df.format(w[0]) + "  " + df.format(w[1]) + "  " + df.format(w[2]));
    }
    System.out.println("Different time sections:");
    Placement q = new Placement(null, new TimeLocation(1, 102, 12, 0, 0, null, null, new BitSet(), 10), new ArrayList<RoomLocation>());
    for (Request r : s.getRequests()) {
        CourseRequest cr = (CourseRequest) r;
        double[] w = new double[] { 0.0, 0.0, 0.0 };
        for (int i = 0; i < cr.getCourses().size(); i++) {
            Config cfg = new Config(0l, -1, "", cr.getCourses().get(i).getOffering());
            Set<SctAssignment> sections = new HashSet<SctAssignment>();
            sections.add(new Section(0, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null));
            Enrollment e = new Enrollment(cr, i, cfg, sections, assignment);
            Set<SctAssignment> other = new HashSet<SctAssignment>();
            other.add(new Section(1, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), q, null));
            cr.setInitialAssignment(new Enrollment(cr, i, cfg, other, assignment));
            w[i] = pw.getWeight(assignment, e, null, null);
        }
        System.out.println(cr + ": " + df.format(w[0]) + "  " + df.format(w[1]) + "  " + df.format(w[2]));
    }
    System.out.println("Two sections, one same choice, one same time:");
    for (Request r : s.getRequests()) {
        CourseRequest cr = (CourseRequest) r;
        double[] w = new double[] { 0.0, 0.0, 0.0 };
        for (int i = 0; i < cr.getCourses().size(); i++) {
            Config cfg = new Config(0l, -1, "", cr.getCourses().get(i).getOffering());
            Set<SctAssignment> sections = new HashSet<SctAssignment>();
            sections.add(new Section(0, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null));
            sections.add(new Section(1, 1, "y", new Subpart(1, "Rec", "Rec", cfg, null), p, null));
            Enrollment e = new Enrollment(cr, i, cfg, sections, assignment);
            Set<SctAssignment> other = new HashSet<SctAssignment>();
            other.add(new Section(2, 1, "x", new Subpart(0, "Lec", "Lec", cfg, null), p, null));
            other.add(new Section(3, 1, "y", new Subpart(1, "Rec", "Rec", cfg, null), p, null, new Instructor(1l, null, "Josef Novak", null)));
            cr.setInitialAssignment(new Enrollment(cr, i, cfg, other, assignment));
            w[i] = pw.getWeight(assignment, e, null, null);
        }
        System.out.println(cr + ": " + df.format(w[0]) + "  " + df.format(w[1]) + "  " + df.format(w[2]));
    }
}