private String geometrySignature(Geometry geom) {
if (geom == null) return "";
String sig = geom.getGeometryType();
if (geom instanceof GeometryCollection) {
sig += "[" + geom.getNumGeometries() + "]";
} else {
sig += "(" + geom.getNumPoints() + ")";
}
return sig;
}
/**
* 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));
}
private int calculateSize(Geometry geom, boolean includeSrid) {
int size = 1 + ByteBuffer.UINT_SIZE; // size for order byte + type field
if (geom.getSRID() > 0 && includeSrid) size += 4;
if (geom instanceof GeometryCollection) {
size += sizeOfGeometryCollection((GeometryCollection) geom);
} else if (geom instanceof Polygon) {
size += getPolygonSize((Polygon) geom);
} else if (geom instanceof Point) {
size += getPointByteSize(geom);
} else if (geom instanceof PolyHedralSurface) {
size += getPolyHedralSurfaceSize((PolyHedralSurface) geom);
} else {
size += ByteBuffer.UINT_SIZE; // to hold number of points
size += getPointByteSize(geom) * geom.getNumPoints();
}
return size;
}
