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

Example 1 with Request

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

the class StudentPreferencePenalties method getMinMaxEnrollmentPenalty.

/** Minimal and maximal available enrollment penalty of a request 
     * @param request student course request
     * @return minimal and maximal penalty
     **/
public double[] getMinMaxEnrollmentPenalty(CourseRequest request) {
    List<Enrollment> enrollments = request.values(new EmptyAssignment<Request, Enrollment>());
    if (enrollments.isEmpty())
        return new double[] { 0, 0 };
    double min = Double.MAX_VALUE, max = Double.MIN_VALUE;
    for (Enrollment enrollment : enrollments) {
        double penalty = getPenalty(enrollment);
        min = Math.min(min, penalty);
        max = Math.max(max, penalty);
    }
    return new double[] { min, max };
}

Example 2 with Request

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

the class StudentRequestXml method exportModel.

public static Document exportModel(Assignment<Request, Enrollment> assignment, StudentSectioningModel model) {
    Document document = DocumentHelper.createDocument();
    Element requestElement = document.addElement("request");
    requestElement.addAttribute("campus", model.getProperties().getProperty("Data.Initiative"));
    requestElement.addAttribute("year", model.getProperties().getProperty("Data.Year"));
    requestElement.addAttribute("term", model.getProperties().getProperty("Data.Term"));
    for (Student student : model.getStudents()) {
        Element studentElement = requestElement.addElement("student");
        studentElement.addAttribute("key", String.valueOf(student.getId()));
        Element courseRequestsElement = studentElement.addElement("updateCourseRequests");
        courseRequestsElement.addAttribute("commit", "true");
        Collections.sort(student.getRequests(), new Comparator<Request>() {

            @Override
            public int compare(Request r1, Request r2) {
                if (r1.isAlternative() != r2.isAlternative()) {
                    return (r1.isAlternative() ? 1 : -1);
                }
                return Double.compare(r1.getPriority(), r2.getPriority());
            }
        });
        boolean hasSchedule = false;
        for (Request request : student.getRequests()) {
            if (assignment.getValue(request) != null)
                hasSchedule = true;
            if (request instanceof FreeTimeRequest) {
                FreeTimeRequest ftReq = (FreeTimeRequest) request;
                Element ftReqElement = courseRequestsElement.addElement("freeTime");
                requestElement.addAttribute("days", ftReq.getTime().getDayHeader());
                int startSlot = ftReq.getTime().getStartSlot();
                int startTime = startSlot * Constants.SLOT_LENGTH_MIN + Constants.FIRST_SLOT_TIME_MIN;
                ftReqElement.addAttribute("startTime", s2zDF.format(startTime / 60) + s2zDF.format(startTime % 60));
                int endTime = startTime + ftReq.getTime().getLength() * Constants.SLOT_LENGTH_MIN - ftReq.getTime().getBreakTime();
                ftReqElement.addAttribute("endTime", s2zDF.format(endTime / 60) + s2zDF.format(endTime % 60));
                ftReqElement.addAttribute("length", String.valueOf(ftReq.getTime().getLength() * Constants.SLOT_LENGTH_MIN));
            } else {
                CourseRequest crReq = (CourseRequest) request;
                Element crReqElement = courseRequestsElement.addElement("courseOffering");
                Course course = crReq.getCourses().get(0);
                crReqElement.addAttribute("subjectArea", course.getSubjectArea());
                crReqElement.addAttribute("courseNumber", course.getCourseNumber());
                crReqElement.addAttribute("waitlist", crReq.isWaitlist() ? "true" : "false");
                crReqElement.addAttribute("alternative", crReq.isAlternative() ? "true" : "false");
                for (int i = 1; i < crReq.getCourses().size(); i++) {
                    Course altCourse = crReq.getCourses().get(i);
                    Element altCourseElement = crReqElement.addElement("alternative");
                    altCourseElement.addAttribute("subjectArea", altCourse.getSubjectArea());
                    altCourseElement.addAttribute("courseNumber", altCourse.getCourseNumber());
                }
            }
        }
        if (hasSchedule) {
            Element requestScheduleElement = studentElement.addElement("requestSchedule");
            requestScheduleElement.addAttribute("type", "commit");
            for (Request request : student.getRequests()) {
                if (request instanceof CourseRequest) {
                    CourseRequest crReq = (CourseRequest) request;
                    Enrollment enrollment = assignment.getValue(crReq);
                    if (enrollment == null)
                        continue;
                    Element crReqElement = requestScheduleElement.addElement("courseOffering");
                    Course course = enrollment.getCourse();
                    crReqElement.addAttribute("subjectArea", course.getSubjectArea());
                    crReqElement.addAttribute("courseNumber", course.getCourseNumber());
                    for (Section section : enrollment.getSections()) {
                        Element classEl = crReqElement.addElement("class");
                        classEl.addAttribute("id", section.getSubpart().getInstructionalType());
                        classEl.addAttribute("assignmentId", String.valueOf(section.getId()));
                    }
                }
            }
        }
    }
    return document;
}

Example 3 with Request

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

the class StudentRequestXml method main.

public static void main(String[] args) {
    try {
        ToolBox.configureLogging();
        StudentSectioningModel model = new StudentSectioningModel(new DataProperties());
        Assignment<Request, Enrollment> assignment = new DefaultSingleAssignment<Request, Enrollment>();
        StudentSectioningXMLLoader xmlLoad = new StudentSectioningXMLLoader(model, assignment);
        xmlLoad.setInputFile(new File(args[0]));
        xmlLoad.load();
        Document document = exportModel(assignment, model);
        FileOutputStream fos = new FileOutputStream(new File(args[1]));
        (new XMLWriter(fos, OutputFormat.createPrettyPrint())).write(document);
        fos.flush();
        fos.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Example 4 with Request

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

the class StudentSctBBTest method getSolution.

/**
     * Compute and return the sectioning solution. It contains only the given
     * student with his/her schedule
     * @return current solution
     */
public Solution<Request, Enrollment> getSolution() {
    if (iSolution == null) {
        iSolution = new Solution<Request, Enrollment>(this, new DefaultSingleAssignment<Request, Enrollment>());
        BranchBoundSelection.Selection selection = new BranchBoundSelection(new DataProperties()).getSelection(iSolution.getAssignment(), getStudent());
        Neighbour<Request, Enrollment> neighbour = selection.select();
        if (neighbour != null)
            neighbour.assign(iSolution.getAssignment(), 0);
        iTime = selection.getTime();
        iTimeoutReached = selection.isTimeoutReached();
    }
    return iSolution;
}

Example 5 with Request

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

the class StudentSectioningXMLLoader method loadStudents.

/**
     * Load students
     * @param studentsEl students element
     * @param offeringTable offering table
     * @param courseTable course table
     */
protected void loadStudents(Element studentsEl, Map<Long, Offering> offeringTable, Map<Long, Course> courseTable) {
    List<Enrollment> bestEnrollments = new ArrayList<Enrollment>();
    List<Enrollment> currentEnrollments = new ArrayList<Enrollment>();
    for (Iterator<?> i = studentsEl.elementIterator("student"); i.hasNext(); ) {
        Element studentEl = (Element) i.next();
        Student student = loadStudent(studentEl, offeringTable);
        if (iStudentFilter != null && !iStudentFilter.accept(student))
            continue;
        for (Iterator<?> j = studentEl.elementIterator(); j.hasNext(); ) {
            Element requestEl = (Element) j.next();
            Request request = loadRequest(requestEl, student, offeringTable, courseTable);
            if (request == null)
                continue;
            Element initialEl = requestEl.element("initial");
            if (iLoadInitial && initialEl != null) {
                Enrollment enrollment = loadEnrollment(initialEl, request);
                if (enrollment != null)
                    request.setInitialAssignment(enrollment);
            }
            Element currentEl = requestEl.element("current");
            if (iLoadCurrent && currentEl != null) {
                Enrollment enrollment = loadEnrollment(currentEl, request);
                if (enrollment != null)
                    currentEnrollments.add(enrollment);
            }
            Element bestEl = requestEl.element("best");
            if (iLoadBest && bestEl != null) {
                Enrollment enrollment = loadEnrollment(bestEl, request);
                if (enrollment != null)
                    bestEnrollments.add(enrollment);
            }
        }
        getModel().addStudent(student);
    }
    if (!bestEnrollments.isEmpty()) {
        // Enrollments with a reservation must go first
        for (Enrollment enrollment : bestEnrollments) {
            if (enrollment.getReservation() == null)
                continue;
            if (!enrollment.getStudent().isAvailable(enrollment)) {
                sLogger.warn("Enrollment " + enrollment + " is conflicting: student not available.");
                continue;
            }
            Map<Constraint<Request, Enrollment>, Set<Enrollment>> conflicts = getModel().conflictConstraints(getAssignment(), enrollment);
            if (conflicts.isEmpty())
                getAssignment().assign(0, enrollment);
            else
                sLogger.warn("Enrollment " + enrollment + " conflicts with " + conflicts);
        }
        for (Enrollment enrollment : bestEnrollments) {
            if (enrollment.getReservation() != null)
                continue;
            if (!enrollment.getStudent().isAvailable(enrollment)) {
                sLogger.warn("Enrollment " + enrollment + " is conflicting: student not available.");
                continue;
            }
            Map<Constraint<Request, Enrollment>, Set<Enrollment>> conflicts = getModel().conflictConstraints(getAssignment(), enrollment);
            if (conflicts.isEmpty())
                getAssignment().assign(0, enrollment);
            else
                sLogger.warn("Enrollment " + enrollment + " conflicts with " + conflicts);
        }
        getModel().saveBest(getAssignment());
    }
    if (!currentEnrollments.isEmpty()) {
        for (Request request : getModel().variables()) getAssignment().unassign(0, request);
        // Enrollments with a reservation must go first
        for (Enrollment enrollment : currentEnrollments) {
            if (enrollment.getReservation() == null)
                continue;
            if (!enrollment.getStudent().isAvailable(enrollment)) {
                sLogger.warn("Enrollment " + enrollment + " is conflicting: student not available.");
                continue;
            }
            Map<Constraint<Request, Enrollment>, Set<Enrollment>> conflicts = getModel().conflictConstraints(getAssignment(), enrollment);
            if (conflicts.isEmpty())
                getAssignment().assign(0, enrollment);
            else
                sLogger.warn("Enrollment " + enrollment + " conflicts with " + conflicts);
        }
        for (Enrollment enrollment : currentEnrollments) {
            if (enrollment.getReservation() != null)
                continue;
            if (!enrollment.getStudent().isAvailable(enrollment)) {
                sLogger.warn("Enrollment " + enrollment + " is conflicting: student not available.");
                continue;
            }
            Map<Constraint<Request, Enrollment>, Set<Enrollment>> conflicts = getModel().conflictConstraints(getAssignment(), enrollment);
            if (conflicts.isEmpty())
                getAssignment().assign(0, enrollment);
            else
                sLogger.warn("Enrollment " + enrollment + " conflicts with " + conflicts);
        }
    }
}