private void Extract(IGeometry geom)
{
if (_geomFact == null)
{
_geomFact = geom.Factory;
}
/*
* PolygonExtracter.getPolygons(geom, polygons);
* LineStringExtracter.getLines(geom, lines);
* PointExtracter.getPoints(geom, points);
*/
GeometryExtracter.Extract <IPolygon>(geom, _polygons);
GeometryExtracter.Extract <ILineString>(geom, _lines);
GeometryExtracter.Extract <IPoint>(geom, _points);
}
public void TestExtract()
{
var gc = Rdr.Read(
"GEOMETRYCOLLECTION ( POINT (1 1), LINESTRING (0 0, 10 10), LINESTRING (10 10, 20 20), LINEARRING (10 10, 20 20, 15 15, 10 10), POLYGON ((0 0, 100 0, 100 100, 0 100, 0 0)), GEOMETRYCOLLECTION ( POINT (1 1) ) )");
// verify that LinearRings are included when extracting LineStrings
var lineStringsAndLinearRings = GeometryExtracter.Extract <LineString>(gc);
Assert.AreEqual(3, lineStringsAndLinearRings.Count);
// verify that only LinearRings are extracted
var linearRings = GeometryExtracter.Extract <LinearRing>(gc);
Assert.AreEqual(1, linearRings.Count);
// verify that nested geometries are extracted
var points = GeometryExtracter.Extract <Point>(gc);
Assert.AreEqual(2, points.Count);
}
