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