public TopoCollection(string type, TopoObject[] geometries)
: base(type)
{
if (geometries == null)
throw new ArgumentNullException("geometries");
_geometries = geometries;
}
public FeatureCollection Create(TopoObject data)
{
if (data == null)
throw new ArgumentNullException("data");
string type = data.Type;
if (String.IsNullOrEmpty(type))
throw new ArgumentException("type undefined", "data");
if (String.Equals("GeometryCollection", type))
{
// a TopoJSON "GeometryCollection" actually is an IFeature array
// so we handle this stuff as a special case
TopoCollection coll = (TopoCollection)data;
return CreateCollection(coll.Geometries);
}
IGeometry geometry;
switch (type)
{
case "Point":
TopoPoint point = (TopoPoint)data;
geometry = CreatePoint(point.Coordinates);
break;
case "MultiPoint":
TopoMultiPoint mpoint = (TopoMultiPoint)data;
geometry = CreateMultiPoint(mpoint.Coordinates);
break;
case "LineString":
TopoLineString lstring = (TopoLineString)data;
geometry = CreateLineString(lstring.Arcs);
break;
case "MultiLineString":
TopoMultiLineString mlstring = (TopoMultiLineString)data;
geometry = CreateMultiLineString(mlstring.Arcs);
break;
case "Polygon":
TopoPolygon poly = (TopoPolygon)data;
geometry = CreatePolygon(poly.Arcs);
break;
case "MultiPolygon":
TopoMultiPolygon mpoly = (TopoMultiPolygon)data;
geometry = CreateMultiPolygon(mpoly.Arcs);
break;
default:
string s = string.Format("type unsupported: {0}", type);
throw new NotSupportedException(s);
}
IAttributesTable properties = data.Properties;
Feature feature = new Feature(geometry, properties);
Collection<IFeature> collection = new Collection<IFeature> { feature };
return new FeatureCollection(collection);
}
public TopoBuilder(string type,
long id,
IAttributesTable properties,
double[][] coordinates,
int[][][] arcs,
TopoObject[] geometries)
{
if (String.IsNullOrEmpty(type))
throw new ArgumentNullException("type", "type null");
_type = type;
_id = id;
_properties = properties ?? new AttributesTable();
_coordinates = coordinates;
_arcs = arcs;
_geometries = geometries;
}
private FeatureCollection CreateCollection(TopoObject[] data)
{
IFeature[] features = new IFeature[data.Length];
for (int i = 0; i < data.Length; i++)
{
TopoObject component = data[i];
FeatureCollection coll = Create(component);
features[i] = coll[0];
}
FeatureCollection collection = new FeatureCollection();
foreach (IFeature feature in features)
collection.Add(feature);
return collection;
}
