public Date getCalendarBeginDate() {
Date beginDate = getExecutionPeriod().getBeginDate();
final ExecutionDegree executionDegree = getExecutionDegree();
if (executionDegree != null) {
if (getExecutionPeriod().getSemester().intValue() == 1
&& executionDegree.getPeriodLessonsFirstSemester().getStart() != null) {
beginDate = executionDegree.getPeriodLessonsFirstSemester().getStart();
} else if (getExecutionPeriod().getSemester().intValue() == 2
&& executionDegree.getPeriodLessonsSecondSemester().getStart() != null) {
beginDate = executionDegree.getPeriodLessonsSecondSemester().getStart();
}
}
return beginDate;
}
