getBoundary method

Geometry getBoundary()

Computes the boundary of this geometry

@return a lineal geometry (which may be empty) @see Geometry#getBoundary

Implementation

Geometry getBoundary() {
  if (isEmpty()) {
    return getFactory().createMultiLineStringEmpty();
  }
  List allRings = [];
  for (int i = 0; i < geometries.length; i++) {
    Polygon polygon = geometries[i] as Polygon;
    Geometry rings = polygon.getBoundary();
    for (int j = 0; j < rings.getNumGeometries(); j++) {
      allRings.add(rings.getGeometryN(j));
    }
  }
  return getFactory().createMultiLineString(allRings as List<LineString>);
}