getBoundary method
Returns the boundary, or an empty geometry of appropriate dimension
if this Geometry
is empty.
(In the case of zero-dimensional geometries, '
an empty GeometryCollection is returned.)
For a discussion of this function, see the OpenGIS Simple
Features Specification. As stated in SFS Section 2.1.13.1, "the boundary
of a Geometry is a set of Geometries of the next lower dimension."
@return the closure of the combinatorial boundary of this Geometry
Implementation
Geometry getBoundary() {
Geometry.checkNotGeometryCollection(this);
Assert.shouldNeverReachHere();
throw StateError("Should never reach here");
}