/**
* Returns <code>true</code> if {@link TimeInterval} i1 contains {@link TimeInterval} i2, <code>
* false</code> otherwise (<code>null</code> border means infinity).
*/
public static boolean contains(TimeInterval i1, TimeInterval i2) {
if (i1 == null || i2 == null) return false;
i1 = arrange(i1);
i2 = arrange(i2);
if (i2.getStart() == null && i2.getEnd() == null)
return i1.getStart() == null && i1.getEnd() == null;
else if (i2.getStart() != null && i2.getEnd() == null)
return i1.contains(i2.getStart()) && i1.getEnd() == null;
else if (i2.getStart() == null && i2.getEnd() != null)
return i1.getStart() == null && i1.contains(i2.getEnd());
else return i1.contains(i2.getStart()) && i1.contains(i2.getEnd());
}
/**
* Returns <code>true</code> if {@link TimeInterval} i1 intersects {@link TimeInterval} i2, <code>
* false</code> otherwise (<code>null</code> border means infinity).
*/
public static boolean intersects(TimeInterval i1, TimeInterval i2) {
if (i1 == null || i2 == null) return false;
i1 = arrange(i1);
i2 = arrange(i2);
if (i1.getStart() == null && i1.getEnd() == null) {
return true;
} else if (i1.getStart() != null && i1.getEnd() == null) {
if (i2.getEnd() == null) return true;
else if (i2.getStart() == null && i2.getEnd() != null) return i1.contains(i2.getEnd());
else return i1.contains(i2.getEnd()) || i1.contains(i2.getStart());
} else if (i1.getStart() == null && i1.getEnd() != null) {
if (i2.getStart() == null) return true;
else if (i2.getStart() != null && i2.getEnd() == null) return i1.contains(i2.getStart());
else return i1.contains(i2.getEnd()) || i1.contains(i2.getStart());
} else {
if (i2.getStart() == null && i2.getEnd() == null) return true;
else if (i2.getStart() == null || i2.getEnd() == null)
return i2.contains(i1.getEnd()) || i2.contains(i1.getStart());
else
return i1.contains(i2.getStart())
|| i1.contains(i2.getEnd())
|| i2.contains(i1.getStart())
|| i2.contains(i1.getEnd());
}
}
