/**
* Returns the nth point of a line.
*
* @param node xml element containing gml object(s)
* @param number index of i-th point
* @return n-th point as a gml element
* @throws QueryException query exception
*/
@Deterministic
public ANode pointN(final ANode node, final Int number) throws QueryException {
final Geometry geo = geo(node, Q_GML_LINEARRING, Q_GML_LINESTRING);
if (geo == null && checkGeo(node) != null)
throw GeoErrors.geoType(node.qname().local(), "Line");
final int max = geo.getNumPoints();
final long n = number.itr();
if (n < 1 || n > max) throw GeoErrors.outOfRangeIdx(number);
return gmlWriter(((LineString) geo).getPointN((int) n - 1));
}
