private static GanttDate min(GanttDate one, GanttDate other) {
if (one == null) {
return other;
}
if (other == null) {
return one;
}
return one.compareTo(other) < 0 ? one : other;
}
public GanttDate getEnd() {
GanttDate result = getEndPeriod();
for (LoadTimeLine loadTimeLine : getChildren()) {
GanttDate end = loadTimeLine.getEnd();
if (end != null) {
result = result == null || result.compareTo(end) < 0 ? end : result;
}
}
return result;
}
public GanttDate getStart() {
GanttDate result = getStartPeriod();
for (LoadTimeLine loadTimeLine : getChildren()) {
GanttDate start = loadTimeLine.getStart();
if (start != null) {
result = result == null || result.compareTo(start) > 0 ? start : result;
}
}
return result;
}