List<PeriodHardConstraint> periodHardConstraintList = new ArrayList<PeriodHardConstraint>();
String line = bufferedReader.readLine();
int id = 0;
while (!line.equals("[RoomHardConstraints]")) {
String[] lineTokens = line.split(SPLIT_REGEX);
PeriodHardConstraint periodHardConstraint = new PeriodHardConstraint();
periodHardConstraint.setId((long) id);
if (lineTokens.length != 3) {
throw new IllegalArgumentException("Read line (" + line + ") is expected to contain 3 tokens.");
}
Topic leftTopic = topicList.get(Integer.parseInt(lineTokens[0]));
periodHardConstraint.setLeftSideTopic(leftTopic);
PeriodHardConstraintType periodHardConstraintType = PeriodHardConstraintType.valueOf(lineTokens[1]);
periodHardConstraint.setPeriodHardConstraintType(periodHardConstraintType);
Topic rightTopic = topicList.get(Integer.parseInt(lineTokens[2]));
periodHardConstraint.setRightSideTopic(rightTopic);
if (periodHardConstraintType == PeriodHardConstraintType.EXAM_COINCIDENCE) {
// It's not specified what happens
// when A coincidences with B and B coincidences with C
// and when A and C share students (but don't directly coincidence)
if (!Collections.disjoint(leftTopic.getStudentList(), rightTopic.getStudentList())) {