private boolean eventuallyUseBeginComplete() {
if (data.containsKey(ItemCaract.BEGIN)
&& data.containsKey(ItemCaract.COMPLETED)
&& data.containsKey(ItemCaract.DURATION) == false) {
final Instant i1 = (Instant) data.get(ItemCaract.BEGIN);
final Instant i2 = (Instant) data.get(ItemCaract.COMPLETED);
if (i2.compareTo(i1) <= 0) {
throw new IllegalArgumentException();
}
data.put(ItemCaract.DURATION, math.diff(i1, i2));
return true;
}
return false;
}
