Examples with Instructor org.cpsolver.instructor.model.Instructor used on opensource projects

Example 1 with Instructor

use of org.cpsolver.instructor.model.Instructor in project cpsolver by UniTime.

the class SameLinkConstraint method getCurrentPreference.

/**
 * Current constraint preference (if soft)
 * @param assignment current assignment
 * @return that is number of requests that are not of this link assigned to the instructors that have at least one request of this link if preferred;
 * number of additional requests of this link given to the same instructor if discouraged
 */
public int getCurrentPreference(Assignment<TeachingRequest.Variable, TeachingAssignment> assignment) {
    // no preference
    if (isHard())
        return 0;
    if (getPreference() < 0) {
        // preferred
        int ret = 0;
        Set<Instructor> checked = new HashSet<Instructor>();
        for (TeachingRequest.Variable tr : variables()) {
            TeachingAssignment ta = assignment.getValue(tr);
            if (ta == null || !checked.add(ta.getInstructor()))
                continue;
            Instructor.Context context = ta.getInstructor().getContext(assignment);
            for (TeachingAssignment other : context.getAssignments()) {
                if (!variables().contains(other.variable())) {
                    ret++;
                }
            }
        }
        return ret;
    } else if (getPreference() > 0) {
        int ret = 0;
        Set<Instructor> checked = new HashSet<Instructor>();
        for (TeachingRequest.Variable tr : variables()) {
            TeachingAssignment ta = assignment.getValue(tr);
            if (ta == null || !checked.add(ta.getInstructor()))
                continue;
            Instructor.Context context = ta.getInstructor().getContext(assignment);
            for (TeachingAssignment other : context.getAssignments()) {
                if (!variables().equals(tr) && variables().contains(other.variable())) {
                    ret++;
                }
            }
        }
        return ret;
    } else {
        return 0;
    }
}

Example 2 with Instructor

use of org.cpsolver.instructor.model.Instructor in project cpsolver by UniTime.

the class Test method generateReports.

/**
 * Generate a few reports
 * @param outputDir output directory
 * @param assignment current assignments
 * @throws IOException
 */
protected void generateReports(File outputDir, Assignment<TeachingRequest.Variable, TeachingAssignment> assignment) throws IOException {
    PrintWriter out = new PrintWriter(new File(outputDir, "solution-assignments.csv"));
    out.println("Course,Section,Time,Room,Load,Student,Name,Instructor Pref,Course Pref,Attribute Pref,Time Pref,Back-To-Back,Same-Days,Same-Room,Different Lecture,Overlap [h]");
    double diffRoomWeight = getProperties().getPropertyDouble("BackToBack.DifferentRoomWeight", 0.8);
    double diffTypeWeight = getProperties().getPropertyDouble("BackToBack.DifferentTypeWeight", 0.5);
    double diffRoomWeightSD = getProperties().getPropertyDouble("SameDays.DifferentRoomWeight", 0.8);
    double diffTypeWeightSD = getProperties().getPropertyDouble("SameDays.DifferentTypeWeight", 0.5);
    double diffTypeWeightSR = getProperties().getPropertyDouble("SameRoom.DifferentTypeWeight", 0.5);
    for (TeachingRequest.Variable request : variables()) {
        out.print(request.getCourse().getCourseName());
        String sect = "", time = "", room = "";
        for (Iterator<Section> i = request.getSections().iterator(); i.hasNext(); ) {
            Section section = i.next();
            sect += section.getSectionName();
            time += (section.getTime() == null ? "-" : section.getTime().getDayHeader() + " " + section.getTime().getStartTimeHeader(true));
            room += (section.getRoom() == null ? "-" : section.getRoom());
            if (i.hasNext()) {
                sect += ", ";
                time += ", ";
                room += ", ";
            }
        }
        out.print(",\"" + sect + "\",\"" + time + "\",\"" + room + "\"");
        out.print("," + new DecimalFormat("0.0").format(request.getRequest().getLoad()));
        TeachingAssignment ta = assignment.getValue(request);
        if (ta != null) {
            Instructor instructor = ta.getInstructor();
            out.print("," + instructor.getExternalId());
            out.print(",\"" + instructor.getName() + "\"");
            out.print("," + (ta.getInstructorPreference() == 0 ? "" : ta.getInstructorPreference()));
            out.print("," + (ta.getCoursePreference() == 0 ? "" : ta.getCoursePreference()));
            out.print("," + (ta.getAttributePreference() == 0 ? "" : ta.getAttributePreference()));
            out.print("," + (ta.getTimePreference() == 0 ? "" : ta.getTimePreference()));
            double b2b = instructor.countBackToBacks(assignment, ta, diffRoomWeight, diffTypeWeight);
            out.print("," + (b2b == 0.0 ? "" : new DecimalFormat("0.0").format(b2b)));
            double sd = instructor.countSameDays(assignment, ta, diffRoomWeightSD, diffTypeWeightSD);
            out.print("," + (sd == 0.0 ? "" : new DecimalFormat("0.0").format(sd)));
            double sr = instructor.countSameRooms(assignment, ta, diffTypeWeightSR);
            out.print("," + (sr == 0.0 ? "" : new DecimalFormat("0.0").format(sr)));
            double dl = instructor.differentLectures(assignment, ta);
            out.print("," + (dl == 0.0 ? "" : new DecimalFormat("0.0").format(dl)));
            double sh = instructor.share(assignment, ta);
            out.print("," + (sh == 0 ? "" : new DecimalFormat("0.0").format(sh / 12.0)));
        }
        out.println();
    }
    out.flush();
    out.close();
    out = new PrintWriter(new File(outputDir, "solution-students.csv"));
    out.println("Student,Name,Preference,Not Available,Time Pref,Course Pref,Back-to-Back,Same-Days,Same-Room,Max Load,Assigned Load,Back-To-Back,Same-Days,Same-Room,Different Lecture,Overlap [h],1st Assignment,2nd Assignment, 3rd Assignment");
    for (Instructor instructor : getInstructors()) {
        out.print(instructor.getExternalId());
        out.print(",\"" + instructor.getName() + "\"");
        out.print("," + (instructor.getPreference() == 0 ? "" : instructor.getPreference()));
        out.print(",\"" + instructor.getAvailable() + "\"");
        String timePref = "";
        for (Preference<TimeLocation> p : instructor.getTimePreferences()) {
            if (!p.isProhibited()) {
                if (!timePref.isEmpty())
                    timePref += ", ";
                timePref += p.getTarget().getLongName(true).trim() + ": " + (p.isRequired() ? "R" : p.isProhibited() ? "P" : p.getPreference());
            }
        }
        out.print(",\"" + timePref + "\"");
        String coursePref = "";
        for (Preference<Course> p : instructor.getCoursePreferences()) {
            if (!coursePref.isEmpty())
                coursePref += ", ";
            coursePref += p.getTarget().getCourseName() + ": " + (p.isRequired() ? "R" : p.isProhibited() ? "P" : p.getPreference());
        }
        out.print(",\"" + coursePref + "\"");
        out.print("," + (instructor.getBackToBackPreference() == 0 ? "" : instructor.getBackToBackPreference()));
        out.print("," + (instructor.getSameDaysPreference() == 0 ? "" : instructor.getSameDaysPreference()));
        out.print("," + (instructor.getSameRoomPreference() == 0 ? "" : instructor.getSameRoomPreference()));
        out.print("," + new DecimalFormat("0.0").format(instructor.getMaxLoad()));
        Instructor.Context context = instructor.getContext(assignment);
        out.print("," + new DecimalFormat("0.0").format(context.getLoad()));
        out.print("," + (context.countBackToBackPercentage() == 0.0 ? "" : new DecimalFormat("0.0").format(100.0 * context.countBackToBackPercentage())));
        out.print("," + (context.countSameDaysPercentage() == 0.0 ? "" : new DecimalFormat("0.0").format(100.0 * context.countSameDaysPercentage())));
        out.print("," + (context.countSameRoomPercentage() == 0.0 ? "" : new DecimalFormat("0.0").format(100.0 * context.countSameRoomPercentage())));
        out.print("," + (context.countDifferentLectures() == 0.0 ? "" : new DecimalFormat("0.0").format(100.0 * context.countDifferentLectures())));
        out.print("," + (context.countTimeOverlaps() == 0.0 ? "" : new DecimalFormat("0.0").format(context.countTimeOverlaps() / 12.0)));
        for (TeachingAssignment ta : context.getAssignments()) {
            String sect = "";
            for (Iterator<Section> i = ta.variable().getSections().iterator(); i.hasNext(); ) {
                Section section = i.next();
                sect += section.getSectionName() + (section.getTime() == null ? "" : " " + section.getTime().getDayHeader() + " " + section.getTime().getStartTimeHeader(true));
                if (i.hasNext())
                    sect += ", ";
            }
            out.print(",\"" + ta.variable().getCourse() + " " + sect + "\"");
        }
        out.println();
    }
    out.flush();
    out.close();
}

Example 3 with Instructor

use of org.cpsolver.instructor.model.Instructor in project cpsolver by UniTime.

the class UnusedInstructorLoad method getValue.

@Override
public double getValue(Assignment<TeachingRequest.Variable, TeachingAssignment> assignment, Collection<TeachingRequest.Variable> variables) {
    double unused = 0.0;
    Set<Instructor> instructors = new HashSet<Instructor>();
    for (TeachingRequest.Variable req : variables) {
        TeachingAssignment ta = assignment.getValue(req);
        if (ta != null && instructors.add(ta.getInstructor())) {
            unused += ta.getInstructor().getMaxLoad() - ta.getInstructor().getContext(assignment).getLoad();
        }
    }
    return unused;
}

Example 4 with Instructor

use of org.cpsolver.instructor.model.Instructor in project cpsolver by UniTime.

the class MathTest method generateReports.

@Override
protected void generateReports(File dir, Assignment<TeachingRequest.Variable, TeachingAssignment> assignment) throws IOException {
    PrintWriter out = new PrintWriter(new File(dir, "solution-assignments.csv"));
    out.println("Assignment Id,Course,Section,Time,Room,Link,Level,Load,Student,Availability,1st Preference,2nd Preference,3rd Preference,Graduate,Back-To-Back,Max Load,Level,Level,Preference");
    for (TeachingRequest.Variable request : variables()) {
        Long assId = getAssignmentId(request);
        out.print(assId == null ? "" : assId);
        out.print("," + request.getCourse().getCourseName());
        Section section = request.getSections().get(0);
        out.print("," + section.getSectionType());
        out.print("," + section.getTimeName(true));
        out.print(",\"" + (section.hasRoom() ? section.getRoom() : "") + "\"");
        String link = getLink(request);
        out.print("," + (link == null ? "" : link));
        Map<String, Integer> levels = new HashMap<String, Integer>();
        for (Preference<Attribute> p : request.getRequest().getAttributePreferences()) if (p.getTarget().getType().getTypeName().equals("Level"))
            levels.put(p.getTarget().getAttributeName(), -p.getPreference());
        out.print(",\"" + levels + "\"");
        out.print("," + new DecimalFormat("0.0").format(request.getRequest().getLoad()));
        TeachingAssignment value = assignment.getValue(request);
        if (value != null) {
            out.print("," + toString(value.getInstructor()));
            out.print("," + (-value.getAttributePreference()));
            out.print("," + (value.getCoursePreference() == -10 ? "1" : value.getCoursePreference() == -8 ? "2" : value.getCoursePreference() == -5 ? "3" : value.getCoursePreference()));
        }
        out.println();
    }
    out.flush();
    out.close();
    out = new PrintWriter(new File(dir, "solution-students.csv"));
    out.println("Student,Availability,1st Preference,2nd Preference,3rd Preference,Graduate,Back-To-Back,Max Load,Level,Assigned Load,Avg Level,Avg Preference,Back-To-Back,Diff Links,1st Assignment,2nd Assignment, 3rd Assignment");
    for (Instructor instructor : getInstructors()) {
        out.print(instructor.getExternalId());
        out.print(",\"" + instructor.getAvailable() + "\"");
        for (int i = 0; i < 3; i++) {
            Preference<Course> p = (i < instructor.getCoursePreferences().size() ? instructor.getCoursePreferences().get(i) : null);
            out.print("," + (p == null ? "" : p.getTarget().getCourseName()));
        }
        out.print("," + (instructor.getPreference() == 0 ? "Yes" : "No"));
        out.print("," + (instructor.isBackToBackPreferred() ? "1" : instructor.isBackToBackDiscouraged() ? "-1" : "0"));
        out.print("," + new DecimalFormat("0.0").format(instructor.getMaxLoad()));
        String level = getLevel(instructor);
        out.print("," + (level == null ? "" : level));
        Instructor.Context context = instructor.getContext(assignment);
        out.print("," + new DecimalFormat("0.0").format(context.getLoad()));
        double att = 0.0, pref = 0.0;
        for (TeachingAssignment ta : context.getAssignments()) {
            att += Math.abs(ta.getAttributePreference());
            pref += (ta.getCoursePreference() == -10 ? 1 : ta.getCoursePreference() == -8 ? 2 : ta.getCoursePreference() == -5 ? 3 : ta.getCoursePreference());
        }
        int diffLinks = countDiffLinks(context.getAssignments());
        out.print("," + (context.getAssignments().isEmpty() ? "" : new DecimalFormat("0.0").format(att / context.getAssignments().size())));
        out.print("," + (context.getAssignments().isEmpty() || pref == 0.0 ? "" : new DecimalFormat("0.0").format(pref / context.getAssignments().size())));
        out.print("," + new DecimalFormat("0.0").format(100.0 * context.countBackToBackPercentage()));
        out.print("," + (diffLinks <= 0 ? "" : diffLinks));
        for (TeachingAssignment ta : context.getAssignments()) {
            String link = getLink(ta.variable());
            out.print("," + ta.variable().getCourse() + " " + ta.variable().getSections().get(0).getSectionType() + " " + ta.variable().getSections().get(0).getTime().getName(true) + (link == null ? "" : " " + link));
        }
        out.println();
    }
    out.flush();
    out.close();
    out = new PrintWriter(new File(dir, "input-courses.csv"));
    Set<String> levels = new TreeSet<String>();
    for (TeachingRequest.Variable request : variables()) {
        for (Preference<Attribute> p : request.getRequest().getAttributePreferences()) levels.add(p.getTarget().getAttributeName());
    }
    out.print("Course,Type,Load");
    for (String level : levels) out.print("," + level);
    out.println();
    Set<String> courses = new HashSet<String>();
    for (TeachingRequest.Variable request : variables()) {
        if (courses.add(request.getCourse() + "," + request.getSections().get(0).getSectionType())) {
            out.print(request.getCourse().getCourseName() + "," + request.getSections().get(0).getSectionType() + "," + request.getRequest().getLoad());
            for (String level : levels) {
                int pref = 0;
                for (Preference<Attribute> p : request.getRequest().getAttributePreferences()) if (p.getTarget().getAttributeName().equals(level))
                    pref = p.getPreference();
                out.print("," + (pref == 0 ? "" : -pref));
            }
            out.println();
        }
    }
    out.flush();
    out.close();
}

Example 5 with Instructor

use of org.cpsolver.instructor.model.Instructor in project cpsolver by UniTime.

the class MathTest method load.

@Override
protected boolean load(File dir, Assignment<TeachingRequest.Variable, TeachingAssignment> assignment) {
    if (!dir.isDirectory())
        return super.load(dir, assignment);
    try {
        String line = null;
        BufferedReader r = new BufferedReader(new FileReader(new File(dir, "courses.csv")));
        Map<String, Course> courses = new HashMap<String, Course>();
        Map<Long, List<TeachingRequest>> id2classes = new HashMap<Long, List<TeachingRequest>>();
        Map<String, List<TeachingRequest>> link2classes = new HashMap<String, List<TeachingRequest>>();
        long assId = 0, reqId = 0;
        while ((line = r.readLine()) != null) {
            if (line.trim().isEmpty())
                continue;
            String[] fields = line.split(",");
            Long id = Long.valueOf(fields[0]);
            String course = fields[1];
            String section = fields[2];
            int idx = 3;
            int dayCode = 0;
            idx: while (idx < fields.length && (idx == 3 || fields[idx].length() == 1)) {
                for (int i = 0; i < fields[idx].length(); i++) {
                    switch(fields[idx].charAt(i)) {
                        case 'M':
                            dayCode += Constants.DAY_CODES[0];
                            break;
                        case 'T':
                            dayCode += Constants.DAY_CODES[1];
                            break;
                        case 'W':
                            dayCode += Constants.DAY_CODES[2];
                            break;
                        case 'R':
                            dayCode += Constants.DAY_CODES[3];
                            break;
                        case 'F':
                            dayCode += Constants.DAY_CODES[4];
                            break;
                        default:
                            break idx;
                    }
                }
                idx++;
            }
            int startSlot = 0;
            if (dayCode > 0) {
                int time = Integer.parseInt(fields[idx++]);
                startSlot = 12 * (time / 100) + (time % 100) / 5;
            }
            String room = null;
            if (idx < fields.length)
                room = fields[idx++];
            String link = null;
            if (idx < fields.length)
                link = fields[idx++];
            int length = 12;
            if (idx < fields.length) {
                int time = Integer.parseInt(fields[idx++]);
                int endSlot = 12 * (time / 100) + (time % 100) / 5;
                length = endSlot - startSlot;
                if (length == 10)
                    length = 12;
                else if (length == 15)
                    length = 18;
            }
            List<Section> sections = new ArrayList<Section>();
            TimeLocation time = new TimeLocation(dayCode, startSlot, length, 0, 0.0, 0, null, "", null, (length == 18 ? 15 : 10));
            sections.add(new Section(assId++, id.toString(), section, course + " " + section + " " + time.getName(true) + (room == null ? "" : " " + room), time, room, false, false));
            Course c = courses.get(course);
            if (c == null) {
                c = new Course(courses.size(), course);
                courses.put(course, c);
            }
            TeachingRequest clazz = new TeachingRequest(reqId++, 1, c, 0f, sections, Constants.sPreferenceLevelRequired, Constants.sPreferenceLevelNeutral);
            addRequest(clazz);
            List<TeachingRequest> classes = id2classes.get(id);
            if (classes == null) {
                classes = new ArrayList<TeachingRequest>();
                id2classes.put(id, classes);
            }
            classes.add(clazz);
            if (link != null && !link.isEmpty()) {
                List<TeachingRequest> linked = link2classes.get(course + "-" + link);
                if (linked == null) {
                    linked = new ArrayList<TeachingRequest>();
                    link2classes.put(course + "-" + link, linked);
                }
                linked.add(clazz);
            }
        }
        for (Map.Entry<Long, List<TeachingRequest>> e : id2classes.entrySet()) {
            Long id = e.getKey();
            List<TeachingRequest> classes = e.getValue();
            if (classes.size() > 1) {
                SameInstructorConstraint sa = new SameInstructorConstraint(id, "A" + id.toString(), Constants.sPreferenceRequired);
                for (TeachingRequest c : classes) sa.addVariable(c.getVariables()[0]);
                addConstraint(sa);
            }
        }
        for (Map.Entry<String, List<TeachingRequest>> e : link2classes.entrySet()) {
            String link = e.getKey();
            List<TeachingRequest> classes = e.getValue();
            if (classes.size() > 1) {
                SameLinkConstraint sa = new SameLinkConstraint(null, link, Constants.sPreferencePreferred);
                for (TeachingRequest c : classes) sa.addVariable(c.getVariables()[0]);
                addConstraint(sa);
            }
        }
        Attribute.Type level = new Attribute.Type(0l, "Level", false, true);
        addAttributeType(level);
        Map<String, Attribute> code2attribute = new HashMap<String, Attribute>();
        r.close();
        r = new BufferedReader(new FileReader(new File(dir, "level_codes.csv")));
        String[] codes = r.readLine().split(",");
        while ((line = r.readLine()) != null) {
            if (line.trim().isEmpty())
                continue;
            String[] fields = line.split(",");
            String code = fields[0];
            if (code.startsWith("\"") && code.endsWith("\""))
                code = code.substring(1, code.length() - 1);
            Attribute attribute = code2attribute.get(code);
            if (attribute == null) {
                attribute = new Attribute(code2attribute.size(), code, level);
                code2attribute.put(code, attribute);
            }
            for (int i = 1; i < codes.length; i++) {
                int pref = Integer.parseInt(fields[i]);
                if (pref > 0)
                    for (TeachingRequest clazz : getRequests()) {
                        if (clazz.getCourse().getCourseName().contains(codes[i]))
                            clazz.addAttributePreference(new Preference<Attribute>(attribute, -pref));
                    }
            }
        }
        r = new BufferedReader(new FileReader(new File(dir, "hours_per_course.csv")));
        while ((line = r.readLine()) != null) {
            if (line.trim().isEmpty())
                continue;
            String[] fields = line.split(",");
            for (TeachingRequest clazz : getRequests()) {
                if (clazz.getCourse().getCourseName().contains(fields[0]))
                    clazz.setLoad(Float.parseFloat(fields[1]));
            }
        }
        String defaultCode = getProperties().getProperty("TA.DefaultLevelCode", "XXX");
        Attribute defaultAttribute = code2attribute.get(defaultCode);
        if (defaultAttribute == null) {
            defaultAttribute = new Attribute(code2attribute.size(), defaultCode, level);
            code2attribute.put(defaultCode, defaultAttribute);
        }
        for (TeachingRequest.Variable clazz : variables()) {
            sLog.info("Added class " + toString(clazz));
            if (clazz.getRequest().getAttributePreferences().isEmpty()) {
                sLog.error("No level: " + toString(clazz));
                clazz.getRequest().addAttributePreference(new Preference<Attribute>(defaultAttribute, -1));
            }
            if (clazz.getRequest().getLoad() == 0.0) {
                sLog.error("No load: " + toString(clazz));
                clazz.getRequest().setLoad(getProperties().getPropertyFloat("TA.DefaultLoad", 10f));
            }
        }
        r = new BufferedReader(new FileReader(new File(dir, "students.csv")));
        Set<String> studentIds = new HashSet<String>();
        double studentMaxLoad = 0.0;
        while ((line = r.readLine()) != null) {
            if (line.trim().isEmpty())
                continue;
            String[] fields = line.split(",");
            if ("puid".equals(fields[0]))
                continue;
            int idx = 0;
            String id = fields[idx++];
            if (!studentIds.add(id)) {
                sLog.error("Student " + id + " is two or more times in the file.");
            }
            boolean[] av = new boolean[50];
            for (int i = 0; i < 50; i++) av[i] = "1".equals(fields[idx++]);
            List<String> prefs = new ArrayList<String>();
            for (int i = 0; i < 3; i++) {
                String p = fields[idx++].replace("Large lecture", "LEC").replace("Lecture", "LEC").replace("Recitation", "REC");
                if (p.startsWith("MA "))
                    p = p.substring(3);
                if ("I have no preference".equals(p))
                    continue;
                prefs.add(p);
            }
            boolean grad = "Yes".equals(fields[idx++]);
            int b2b = Integer.parseInt(fields[idx++]);
            float maxLoad = Float.parseFloat(fields[idx++]);
            if (maxLoad == 0)
                maxLoad = getProperties().getPropertyFloat("TA.DefaultMaxLoad", 20f);
            String code = (idx < fields.length ? fields[idx++] : null);
            Instructor instructor = new Instructor(Long.valueOf(id.replace("-", "")), id, null, grad ? Constants.sPreferenceLevelNeutral : Constants.sPreferenceLevelDiscouraged, maxLoad);
            for (int i = 0; i < prefs.size(); i++) {
                String pref = prefs.get(i);
                if (pref.indexOf(' ') > 0)
                    pref = pref.substring(0, pref.indexOf(' '));
                Course c = courses.get(pref);
                if (c == null) {
                    c = new Course(courses.size(), pref);
                    courses.put(pref, c);
                }
                instructor.addCoursePreference(new Preference<Course>(c, i == 0 ? -10 : i == 1 ? -8 : -5));
            }
            if (code != null) {
                Attribute attribute = code2attribute.get(code);
                if (attribute == null) {
                    attribute = new Attribute(code2attribute.size(), code, level);
                    code2attribute.put(code, attribute);
                }
                instructor.addAttribute(attribute);
            }
            if (b2b == 1)
                instructor.setBackToBackPreference(Constants.sPreferenceLevelPreferred);
            else if (b2b == -1)
                instructor.setBackToBackPreference(Constants.sPreferenceLevelDiscouraged);
            for (int d = 0; d < 5; d++) {
                int f = -1;
                for (int t = 0; t < 10; t++) {
                    if (!av[10 * d + t]) {
                        if (f < 0)
                            f = t;
                    } else {
                        if (f >= 0) {
                            instructor.addTimePreference(new Preference<TimeLocation>(new TimeLocation(Constants.DAY_CODES[d], 90 + 12 * f, (t - f) * 12, 0, 0.0, null, "", null, 0), Constants.sPreferenceLevelProhibited));
                            f = -1;
                        }
                    }
                }
                if (f >= 0) {
                    instructor.addTimePreference(new Preference<TimeLocation>(new TimeLocation(Constants.DAY_CODES[d], 90 + 12 * f, (10 - f) * 12, 0, 0.0, null, "", null, 0), Constants.sPreferenceLevelProhibited));
                    f = -1;
                }
            }
            if (instructor.getMaxLoad() > 0) {
                addInstructor(instructor);
                sLog.info("Added student " + toString(instructor));
                int nrClasses = 0;
                for (TeachingRequest.Variable req : variables()) {
                    if (instructor.canTeach(req.getRequest()) && !req.getRequest().getAttributePreference(instructor).isProhibited()) {
                        sLog.info("  -- " + toString(req) + "," + (-req.getRequest().getAttributePreference(instructor).getPreferenceInt()) + "," + (-instructor.getCoursePreference(req.getCourse()).getPreference()));
                        nrClasses++;
                    }
                }
                if (nrClasses == 0) {
                    sLog.info("  -- no courses available");
                }
                studentMaxLoad += instructor.getMaxLoad();
            } else {
                sLog.info("Ignoring student " + instructor);
                if (instructor.getMaxLoad() == 0)
                    sLog.info("  -- zero max load");
                else
                    sLog.info("  -- no courses available");
            }
        }
        r.close();
        double totalLoad = 0.0;
        for (TeachingRequest.Variable clazz : variables()) {
            if (clazz.values(getEmptyAssignment()).isEmpty())
                sLog.error("No values: " + toString(clazz));
            totalLoad += clazz.getRequest().getLoad();
        }
        Map<String, Double> studentLevel2load = new HashMap<String, Double>();
        for (Instructor instructor : getInstructors()) {
            Set<Attribute> levels = instructor.getAttributes(level);
            String studentLevel = (levels.isEmpty() ? "null" : levels.iterator().next().getAttributeName());
            Double load = studentLevel2load.get(studentLevel);
            studentLevel2load.put(studentLevel, instructor.getMaxLoad() + (load == null ? 0.0 : load));
        }
        sLog.info("Student max loads: (total: " + sDoubleFormat.format(studentMaxLoad) + ")");
        for (String studentLevel : new TreeSet<String>(studentLevel2load.keySet())) {
            Double load = studentLevel2load.get(studentLevel);
            sLog.info("  " + studentLevel + ": " + sDoubleFormat.format(load));
        }
        Map<String, Double> clazzLevel2load = new HashMap<String, Double>();
        for (TeachingRequest.Variable clazz : variables()) {
            String classLevel = null;
            TreeSet<String> levels = new TreeSet<String>();
            for (Preference<Attribute> ap : clazz.getRequest().getAttributePreferences()) levels.add(ap.getTarget().getAttributeName());
            for (String l : levels) {
                classLevel = (classLevel == null ? "" : classLevel + ",") + l;
            }
            if (classLevel == null)
                classLevel = "null";
            if (clazz.getId() < 0)
                classLevel = clazz.getName();
            Double load = clazzLevel2load.get(classLevel);
            clazzLevel2load.put(classLevel, clazz.getRequest().getLoad() + (load == null ? 0.0 : load));
        }
        sLog.info("Class loads: (total: " + sDoubleFormat.format(totalLoad) + ")");
        for (String classLevel : new TreeSet<String>(clazzLevel2load.keySet())) {
            Double load = clazzLevel2load.get(classLevel);
            sLog.info("  " + level + ": " + sDoubleFormat.format(load));
        }
        return true;
    } catch (IOException e) {
        sLog.error("Failed to load the problem: " + e.getMessage(), e);
        return false;
    }
}