public boolean equals(Object obj) {
if (!(obj instanceof IntervalOfTime)) return false;
IntervalOfTime i = (IntervalOfTime) obj;
return isLowClosed() == i.isLowClosed()
&& isHighClosed() == i.isHighClosed()
&& getLow().equals(i.getLow())
&& getHigh().equals(i.getHigh());
}
public static IntervalOfTime intersection(IntervalOfTime i1, IntervalOfTime i2) {
if (i1.getLow().before(i2.getLow())) {
if (i2.getLow().after(i1.getHigh())) {
return null;
}
return new IntervalOfTime(i2.getLow(), i1.getHigh());
}
if (i1.getLow().after(i2.getHigh())) {
return null;
}
return new IntervalOfTime(i1.getLow(), i2.getHigh());
}
public boolean contains(IntervalOfTime i) {
return getLow().before(i.getLow()) && getHigh().after(i.getLow());
}