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

Example 51 with Request

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

the class Test method fixWeights.

private static void fixWeights(StudentSectioningModel model) {
    HashMap<Course, Integer> lastLike = new HashMap<Course, Integer>();
    HashMap<Course, Integer> real = new HashMap<Course, Integer>();
    HashSet<Long> lastLikeIds = new HashSet<Long>();
    HashSet<Long> realIds = new HashSet<Long>();
    for (Student student : model.getStudents()) {
        if (student.isDummy()) {
            if (!lastLikeIds.add(new Long(student.getId()))) {
                sLog.error("Two last-like student with id " + student.getId());
            }
        } else {
            if (!realIds.add(new Long(student.getId()))) {
                sLog.error("Two real student with id " + student.getId());
            }
        }
        for (Request request : student.getRequests()) {
            if (request instanceof CourseRequest) {
                CourseRequest courseRequest = (CourseRequest) request;
                Course course = courseRequest.getCourses().get(0);
                Integer cnt = (student.isDummy() ? lastLike : real).get(course);
                (student.isDummy() ? lastLike : real).put(course, new Integer((cnt == null ? 0 : cnt.intValue()) + 1));
            }
        }
    }
    for (Student student : new ArrayList<Student>(model.getStudents())) {
        if (student.isDummy() && realIds.contains(new Long(student.getId()))) {
            sLog.warn("There is both last-like and real student with id " + student.getId());
            long newId = -1;
            while (true) {
                newId = 1 + (long) (999999999L * Math.random());
                if (!realIds.contains(new Long(newId)) && !lastLikeIds.contains(new Long(newId)))
                    break;
            }
            lastLikeIds.remove(new Long(student.getId()));
            lastLikeIds.add(new Long(newId));
            student.setId(newId);
            sLog.warn("  -- last-like student id changed to " + student.getId());
        }
        for (Request request : new ArrayList<Request>(student.getRequests())) {
            if (!student.isDummy()) {
                request.setWeight(1.0);
                continue;
            }
            if (request instanceof CourseRequest) {
                CourseRequest courseRequest = (CourseRequest) request;
                Course course = courseRequest.getCourses().get(0);
                Integer lastLikeCnt = lastLike.get(course);
                Integer realCnt = real.get(course);
                courseRequest.setWeight(getLastLikeStudentWeight(course, realCnt == null ? 0 : realCnt.intValue(), lastLikeCnt == null ? 0 : lastLikeCnt.intValue()));
            } else
                request.setWeight(1.0);
            if (request.getWeight() <= 0.0) {
                model.removeVariable(request);
                student.getRequests().remove(request);
            }
        }
        if (student.getRequests().isEmpty()) {
            model.getStudents().remove(student);
        }
    }
}

Example 52 with Request

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

the class Test method load.

/** Load student sectioning model 
     * @param cfg solver configuration
     * @return loaded solution
     **/
public static Solution<Request, Enrollment> load(DataProperties cfg) {
    StudentSectioningModel model = null;
    Assignment<Request, Enrollment> assignment = null;
    try {
        if (cfg.getProperty("Test.CombineStudents") == null) {
            model = new StudentSectioningModel(cfg);
            assignment = new DefaultSingleAssignment<Request, Enrollment>();
            new StudentSectioningXMLLoader(model, assignment).load();
        } else {
            Solution<Request, Enrollment> solution = combineStudents(cfg, new File(cfg.getProperty("Test.CombineStudentsLastLike", cfg.getProperty("General.Input", "." + File.separator + "solution.xml"))), new File(cfg.getProperty("Test.CombineStudents")));
            model = (StudentSectioningModel) solution.getModel();
            assignment = solution.getAssignment();
        }
        if (cfg.getProperty("Test.ExtraStudents") != null) {
            StudentSectioningXMLLoader extra = new StudentSectioningXMLLoader(model, assignment);
            extra.setInputFile(new File(cfg.getProperty("Test.ExtraStudents")));
            extra.setLoadOfferings(false);
            extra.setLoadStudents(true);
            extra.setStudentFilter(new ExtraStudentFilter(model));
            extra.load();
        }
        if (cfg.getProperty("Test.LastLikeCourseDemands") != null)
            loadLastLikeCourseDemandsXml(model, new File(cfg.getProperty("Test.LastLikeCourseDemands")));
        if (cfg.getProperty("Test.StudentInfos") != null)
            loadStudentInfoXml(model, new File(cfg.getProperty("Test.StudentInfos")));
        if (cfg.getProperty("Test.CrsReq") != null)
            loadCrsReqFiles(model, cfg.getProperty("Test.CrsReq"));
    } catch (Exception e) {
        sLog.error("Unable to load model, reason: " + e.getMessage(), e);
        return null;
    }
    if (cfg.getPropertyBoolean("Debug.DistanceConflict", false))
        DistanceConflict.sDebug = true;
    if (cfg.getPropertyBoolean("Debug.BranchBoundSelection", false))
        BranchBoundSelection.sDebug = true;
    if (cfg.getPropertyBoolean("Debug.SwapStudentsSelection", false))
        SwapStudentSelection.sDebug = true;
    if (cfg.getPropertyBoolean("Debug.TimeOverlaps", false))
        TimeOverlapsCounter.sDebug = true;
    if (cfg.getProperty("CourseRequest.SameTimePrecise") != null)
        CourseRequest.sSameTimePrecise = cfg.getPropertyBoolean("CourseRequest.SameTimePrecise", false);
    Logger.getLogger(BacktrackNeighbourSelection.class).setLevel(cfg.getPropertyBoolean("Debug.BacktrackNeighbourSelection", false) ? Level.DEBUG : Level.INFO);
    if (cfg.getPropertyBoolean("Test.FixPriorities", false))
        fixPriorities(model);
    return new Solution<Request, Enrollment>(model, assignment);
}

Example 53 with Request

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

the class StudentSectioningModel method removeStudent.

/**
     * Remove a student from the model
     * @param student a student to be removed from the problem
     */
public void removeStudent(Student student) {
    iStudents.remove(student);
    if (student.isDummy())
        iNrDummyStudents--;
    StudentConflict conflict = null;
    for (Request request : student.getRequests()) {
        for (Constraint<Request, Enrollment> c : request.constraints()) {
            if (c instanceof StudentConflict) {
                conflict = (StudentConflict) c;
                break;
            }
        }
        if (conflict != null)
            conflict.removeVariable(request);
        removeVariable(request);
    }
    if (conflict != null)
        removeConstraint(conflict);
}

Example 54 with Request

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

the class OverlapCheck method check.

/**
     * Check for overlapping sections that are attended by the same student
     * @param a current assignment
     * @return false, if there is such a case
     */
public boolean check(Assignment<Request, Enrollment> a) {
    sLog.info("Checking for overlaps...");
    boolean ret = true;
    for (Student student : getModel().getStudents()) {
        HashMap<TimeLocation, SctAssignment> times = new HashMap<TimeLocation, SctAssignment>();
        for (Request request : student.getRequests()) {
            Enrollment enrollment = a.getValue(request);
            if (enrollment == null)
                continue;
            for (SctAssignment assignment : enrollment.getAssignments()) {
                if (assignment.getTime() == null)
                    continue;
                for (TimeLocation time : times.keySet()) {
                    if (time.hasIntersection(assignment.getTime())) {
                        sLog.error("Student " + student + " assignment " + assignment + " overlaps with " + times.get(time));
                        ret = false;
                    }
                }
                times.put(assignment.getTime(), assignment);
            }
        }
    }
    return ret;
}

Example 55 with Request

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

the class LinkedSections method createConstraint.

/**
     * Create linked-section constraints for a given student
     */
private LinkedSectionsConstraint createConstraint(Student student) {
    List<Request> requests = new ArrayList<Request>();
    int nrOfferings = 0;
    requests: for (Request request : student.getRequests()) {
        if (request instanceof CourseRequest) {
            for (Course course : ((CourseRequest) request).getCourses()) {
                Map<Subpart, Set<Section>> subpartsThisOffering = iSections.get(course.getOffering());
                if (subpartsThisOffering != null) {
                    requests.add(request);
                    nrOfferings++;
                    continue requests;
                }
            }
        }
    }
    if (nrOfferings <= 1)
        return null;
    LinkedSectionsConstraint constraint = new LinkedSectionsConstraint(student, requests);
    student.getRequests().get(0).getModel().addConstraint(constraint);
    return constraint;
}