public CurValue getValue(Assignment<CurVariable, CurValue> assignment, CurStudent student) {
for (CurVariable var : variables()) {
CurValue val = assignment.getValue(var);
if (val != null && val.getStudent().equals(student)) return val;
}
return null;
}
@Override
public void unassigned(Assignment<CurVariable, CurValue> assignment, CurValue value) {
iStudents.remove(value.getStudent());
iSize -= value.getStudent().getWeight();
value.getStudent().getCourses(assignment).remove(CurCourse.this);
/*
if (value.getStudent().getCourses().size() < ((CurModel)value.variable().getModel()).getStudentLimit().getMinLimit())
throw new RuntimeException("Student min limit breached for " + value.getStudent() + ".");
*/
}
@Override
public void assigned(Assignment<CurVariable, CurValue> assignment, CurValue value) {
iStudents.add(value.getStudent());
value.getStudent().getCourses(assignment).add(CurCourse.this);
iSize += value.getStudent().getWeight();
/*
if (iSize > getMaxSize())
throw new RuntimeException("Maximal number of students in a course exceeded " + "(" + iSize + " > " + getMaxSize() + ")");
if (value.getStudent().getCourses().size() > ((CurModel)value.variable().getModel()).getStudentLimit().getMaxLimit())
throw new RuntimeException("Student max limit breached for " + value.getStudent() + " (" + value.getStudent().getCourses().size() + " > " + ((CurModel)value.variable().getModel()).getStudentLimit().getMaxLimit() + ".");
*/
}
public void computeConflicts(
Assignment<CurVariable, CurValue> assignment, CurValue value, Set<CurValue> conflicts) {
if (getSize(assignment) + value.getStudent().getWeight() > getMaxSize()) {
double excess = getSize(assignment) + value.getStudent().getWeight() - getMaxSize();
for (CurValue conf : conflicts)
if (conf.variable().getCourse().equals(this)) excess -= conf.getStudent().getWeight();
/*
if (value.variable().getAssignment() != null && !conflicts.contains(value.variable().getAssignment()))
excess -= value.variable().getAssignment().getStudent().getWeight();
*/
while (excess > 0.0) {
List<CurValue> adepts = new ArrayList<CurValue>();
double best = 0;
for (CurVariable assigned : variables()) {
if (assigned.equals(value.variable())) continue;
CurValue adept = assignment.getValue(assigned);
if (adept == null) continue;
if (conflicts.contains(adept)) continue;
double p = adept.toDouble(assignment);
if (adepts.isEmpty() || p < best) {
best = p;
adepts.clear();
adepts.add(adept);
} else if (p == best) {
adepts.add(adept);
}
}
if (adepts.isEmpty()) {
conflicts.add(value);
break;
}
CurValue conf = ToolBox.random(adepts);
conflicts.add(conf);
excess -= conf.getStudent().getWeight();
}
}
if (getStudents(assignment).contains(value.getStudent()))
for (CurVariable sc : variables()) {
CurValue v = assignment.getValue(sc);
if (v != null && v.getStudent().equals(value.getStudent())) {
conflicts.add(v);
}
}
}