public double penalty(
Assignment<CurVariable, CurValue> assignment, CurStudent newStudent, CurStudent oldStudent) {
if (oldStudent != null && oldStudent.equals(newStudent))
return penalty(assignment, newStudent, null);
double penalty = 0;
for (CurCourse course : iModel.getCourses()) {
if (course.getCourseId().equals(getCourseId())) continue;
double target = getTargetShare(course.getCourseId());
double share = share(assignment, course);
double oldPenalty = Math.abs(share - target);
if (newStudent != null && course.getStudents(assignment).contains(newStudent))
share += newStudent.getWeight();
if (oldStudent != null && course.getStudents(assignment).contains(oldStudent))
share -= oldStudent.getWeight();
double newPenalty = Math.abs(share - target);
penalty += (newPenalty - oldPenalty) * (target == 0.0 ? 10.0 : 1.0);
}
return penalty;
}
public double share(Assignment<CurVariable, CurValue> assignment, CurCourse course) {
double share = 0;
for (CurStudent s : getContext(assignment).getStudents())
if (course.getStudents(assignment).contains(s)) share += s.getWeight();
return share;
}