/**
* @param Geometry $geometry The geometry to export as WKT.
*
* @return string The WKT representation of the given geometry.
*
* @throws GeometryIOException If the given geometry cannot be exported as WKT.
*/
protected function doWrite(Geometry $geometry)
{
$type = strtoupper($geometry->geometryType());
$cs = $geometry->coordinateSystem();
$hasZ = $cs->hasZ();
$hasM = $cs->hasM();
$dimensionality = '';
if ($hasZ || $hasM) {
$dimensionality .= ' ';
if ($hasZ) {
$dimensionality .= 'Z';
}
if ($hasM) {
$dimensionality .= 'M';
}
}
if ($geometry instanceof GeometryCollection) {
$isEmpty = $geometry->numGeometries() === 0;
} else {
$isEmpty = $geometry->isEmpty();
}
if ($isEmpty) {
return $type . $dimensionality . ' EMPTY';
}
if ($geometry instanceof Point) {
$data = $this->writePoint($geometry);
} elseif ($geometry instanceof LineString) {
$data = $this->writeLineString($geometry);
} elseif ($geometry instanceof CircularString) {
$data = $this->writeCircularString($geometry);
} elseif ($geometry instanceof CompoundCurve) {
$data = $this->writeCompoundCurve($geometry);
} elseif ($geometry instanceof Triangle) {
$data = $this->writePolygon($geometry);
} elseif ($geometry instanceof Polygon) {
$data = $this->writePolygon($geometry);
} elseif ($geometry instanceof CurvePolygon) {
$data = $this->writeCurvePolygon($geometry);
} elseif ($geometry instanceof MultiPoint) {
$data = $this->writeMultiPoint($geometry);
} elseif ($geometry instanceof MultiLineString) {
$data = $this->writeMultiLineString($geometry);
} elseif ($geometry instanceof MultiPolygon) {
$data = $this->writeMultiPolygon($geometry);
} elseif ($geometry instanceof GeometryCollection) {
$data = $this->writeGeometryCollection($geometry);
} elseif ($geometry instanceof TIN) {
$data = $this->writePolyhedralSurface($geometry);
} elseif ($geometry instanceof PolyhedralSurface) {
$data = $this->writePolyhedralSurface($geometry);
} else {
throw GeometryIOException::unsupportedGeometryType($geometry->geometryType());
}
return $type . $dimensionality . $this->prettyPrintSpace . '(' . $data . ')';
}