/**
* Returns the nth geometry of a geometry collection, or the geometry if the input is not a
* collection.
*
* @param node xml element containing gml object(s)
* @param number integer number as the index of nth geometry
* @return geometry as a gml element
* @throws QueryException query exception
*/
@Deterministic
public ANode geometryN(final ANode node, final Int number) throws QueryException {
final Geometry geo = checkGeo(node);
final long n = number.itr();
if (n < 1 || n > geo.getNumGeometries()) throw GeoErrors.outOfRangeIdx(number);
return gmlWriter(geo.getGeometryN((int) n - 1));
}
/**
* 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());
}
/**
* 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));
}
/**
* 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));
}
/**
* Returns the dimension of an item.
*
* @param node xml element containing gml object(s)
* @return dimension
* @throws QueryException query exception
*/
@Deterministic
public Int dimension(final ANode node) throws QueryException {
return Int.get(checkGeo(node).getDimension());
}
/**
* Returns the number of points in a geometry.
*
* @param node xml element containing gml object(s)
* @return number of points int value
* @throws QueryException query exception
*/
@Deterministic
public Int numPoints(final ANode node) throws QueryException {
return Int.get(checkGeo(node).getNumPoints());
}
/**
* Returns a database function for the first node in a node set.
*
* @param n node set
* @param i offset
* @return function string
*/
static String openPre(final Nodes n, final int i) {
return Function._DB_OPEN_PRE.get(Str.get(n.data.meta.name), Int.get(n.pres[i])).toString();
}
@Override
Item key(final QueryContext ctx, final int i) {
return Int.get(i);
}