/**
* Returns the number of interior rings in a polygon.
*
* @param node xml element containing gml object(s)
* @return integer number of interior rings
* @throws QueryException query exception
*/
@Deterministic
public Int numInteriorRing(final ANode node) throws QueryException {
final Geometry geo = geo(node, Q_GML_POLYGON);
if (geo == null && checkGeo(node) != null)
throw GeoErrors.geoType(node.qname().local(), "Polygon");
return Int.get(((Polygon) geo).getNumInteriorRing());
}
/**
* Return a boolean value that shows weather the line is a ring or not. A line is a ring if it is
* closed and simple.
*
* @param node xml element containing gml object(s)
* @return boolean value
* @throws QueryException query exception
*/
@Deterministic
public Bln isRing(final ANode node) 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");
return Bln.get(((LineString) geo).isRing());
}
/**
* Returns the start point of a line.
*
* @param node xml element containing gml object(s)
* @return start point geometry as a gml element
* @throws QueryException query exception
*/
@Deterministic
public ANode startPoint(final ANode node) 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");
return gmlWriter(((LineString) geo).getStartPoint());
}
/**
* Returns the z-coordinate value for point.
*
* @param node xml element containing gml object(s)
* @return z double value
* @throws QueryException query exception
*/
@Deterministic
public Dbl z(final ANode node) throws QueryException {
final Geometry geo = geo(node, Q_GML_POINT);
if (geo == null && checkGeo(node) != null)
throw GeoErrors.geoType(node.qname().local(), "Line");
return Dbl.get(geo.getCoordinate().z);
}
/**
* Returns the nth geometry of a geometry collection.
*
* @param node xml element containing gml object(s)
* @param number index of i-th interior ring
* @return n-th interior ring geometry (LineString) as a gml element
* @throws QueryException query exception
*/
@Deterministic
public ANode interiorRingN(final ANode node, final Int number) throws QueryException {
final Geometry geo = geo(node, Q_GML_POLYGON);
if (geo == null && checkGeo(node) != null)
throw GeoErrors.geoType(node.qname().local(), "Polygon");
final long n = number.itr();
final int max = ((Polygon) geo).getNumInteriorRing();
if (n < 1 || n > max) throw GeoErrors.outOfRangeIdx(number);
return gmlWriter(((Polygon) geo).getInteriorRingN((int) n - 1));
}
/**
* Checks if the line is closed loop. That is, if the start Point is same with end Point.
*
* @param node xml element containing gml object(s)
* @return boolean value
* @throws QueryException query exception
*/
@Deterministic
public Bln isClosed(final ANode node) throws QueryException {
final Geometry geo = geo(node, Q_GML_LINEARRING, Q_GML_LINESTRING, Q_GML_MULTILINESTRING);
if (geo == null && checkGeo(node) != null)
throw GeoErrors.geoType(node.qname().local(), "Line");
return Bln.get(
geo instanceof LineString
? ((LineString) geo).isClosed()
: ((MultiLineString) geo).isClosed());
}
/**
* 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));
}