/// <summary>
/// Gets the data polygons from a feature.
/// </summary>
/// <param name="feature">The feature.</param>
/// <returns>List with DataPolygons.</returns>
private List <DataPolygon> GetDataPolygons(Feature feature)
{
GeoJSONObjectType polygonType = feature.Geometry.Type;
List <DataPolygon> polygons = new List <DataPolygon>();
if (!(polygonType == GeoJSONObjectType.MultiPolygon || polygonType == GeoJSONObjectType.Polygon))
{
return(polygons);
}
DataPolygon dataPolygon;
if (polygonType == GeoJSONObjectType.MultiPolygon)
{
MultiPolygon multiPolygon = (MultiPolygon)feature.Geometry;
foreach (Polygon polygon in multiPolygon.Coordinates)
{
dataPolygon = DataPolygonConverter.ConvertToDataPolygon(polygon);
polygons.Add(dataPolygon);
}
}
if (polygonType == GeoJSONObjectType.Polygon)
{
dataPolygon = DataPolygonConverter.ConvertToDataPolygon((Polygon)feature.Geometry);
polygons.Add(dataPolygon);
}
return(polygons);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
reader.Read();
if (!(reader.TokenType == JsonToken.PropertyName && (string)reader.Value == "type"))
{
throw new ArgumentException("invalid tokentype: " + reader.TokenType);
}
reader.Read();
if (reader.TokenType != JsonToken.String)
{
throw new ArgumentException("invalid tokentype: " + reader.TokenType);
}
GeoJSONObjectType geometryType = (GeoJSONObjectType)Enum.Parse(typeof(GeoJSONObjectType), (string)reader.Value);
switch (geometryType)
{
case GeoJSONObjectType.Point:
Coordinate coordinate = serializer.Deserialize <Coordinate>(reader);
return(_factory.CreatePoint(coordinate));
case GeoJSONObjectType.LineString:
Coordinate[] coordinates = serializer.Deserialize <Coordinate[]>(reader);
return(_factory.CreateLineString(coordinates));
case GeoJSONObjectType.Polygon:
List <Coordinate[]> coordinatess = serializer.Deserialize <List <Coordinate[]> >(reader);
return(CreatePolygon(coordinatess));
case GeoJSONObjectType.MultiPoint:
coordinates = serializer.Deserialize <Coordinate[]>(reader);
return(_factory.CreateMultiPoint(coordinates));
case GeoJSONObjectType.MultiLineString:
coordinatess = serializer.Deserialize <List <Coordinate[]> >(reader);
List <ILineString> strings = new List <ILineString>();
for (int i = 0; i < coordinatess.Count; i++)
{
strings.Add(_factory.CreateLineString(coordinatess[i]));
}
return(_factory.CreateMultiLineString(strings.ToArray()));
case GeoJSONObjectType.MultiPolygon:
List <List <Coordinate[]> > coordinatesss = serializer.Deserialize <List <List <Coordinate[]> > >(reader);
List <IPolygon> polygons = new List <IPolygon>();
foreach (List <Coordinate[]> coordinateses in coordinatesss)
{
polygons.Add(CreatePolygon(coordinateses));
}
return(_factory.CreateMultiPolygon(polygons.ToArray()));
case GeoJSONObjectType.GeometryCollection:
List <IGeometry> geoms = serializer.Deserialize <List <IGeometry> >(reader);
return(_factory.CreateGeometryCollection(geoms.ToArray()));
}
return(null);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
reader.Read();
if (!(reader.TokenType == JsonToken.PropertyName && (string)reader.Value == "geometries"))
{
throw new Exception();
}
reader.Read();
if (reader.TokenType != JsonToken.StartArray)
{
throw new Exception();
}
reader.Read();
List <IGeometry> geoms = new List <IGeometry>();
while (reader.TokenType != JsonToken.EndArray)
{
JObject obj = (JObject)serializer.Deserialize(reader);
GeoJSONObjectType geometryType = (GeoJSONObjectType)Enum.Parse(typeof(GeoJSONObjectType), obj.Value <string>("type"));
switch (geometryType)
{
case GeoJSONObjectType.Point:
geoms.Add(_factory.CreatePoint(ToCoordinate(obj.Value <JArray>("coordinates"))));
break;
case GeoJSONObjectType.LineString:
geoms.Add(_factory.CreateLineString(ToCoordinates(obj.Value <JArray>("coordinates"))));
break;
case GeoJSONObjectType.Polygon:
geoms.Add(CreatePolygon(ToListOfCoordinates(obj.Value <JArray>("coordinates"))));
break;
case GeoJSONObjectType.MultiPoint:
geoms.Add(_factory.CreateMultiPoint(ToCoordinates(obj.Value <JArray>("coordinates"))));
break;
case GeoJSONObjectType.MultiLineString:
geoms.Add(CreateMultiLineString(ToListOfCoordinates(obj.Value <JArray>("coordinates"))));
break;
case GeoJSONObjectType.MultiPolygon:
geoms.Add(CreateMultiPolygon(ToListOfListOfCoordinates(obj.Value <JArray>("coordinates"))));
break;
case GeoJSONObjectType.GeometryCollection:
throw new NotSupportedException();
}
reader.Read();
}
return(geoms);
}
public static GeometryType ToGeometryType(this GeoJSONObjectType type)
{
switch (type)
{
case GeoJSONObjectType.Polygon:
return(GeometryType.Polygon);
case GeoJSONObjectType.LineString:
return(GeometryType.Line);
default:
return(GeometryType.Point);
}
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
IGeometry geom = value as IGeometry;
if (geom == null)
{
return;
}
writer.WriteStartObject();
GeoJSONObjectType geomType = ToGeoJsonObject(geom);
writer.WritePropertyName("type");
writer.WriteValue(Enum.GetName(typeof(GeoJSONObjectType), geomType));
switch (geomType)
{
case GeoJSONObjectType.Point:
serializer.Serialize(writer, geom.Coordinate);
break;
case GeoJSONObjectType.LineString:
case GeoJSONObjectType.MultiPoint:
serializer.Serialize(writer, geom.Coordinates);
break;
case GeoJSONObjectType.Polygon:
IPolygon poly = geom as IPolygon;
Debug.Assert(poly != null);
serializer.Serialize(writer, PolygonCoordiantes(poly));
break;
case GeoJSONObjectType.MultiPolygon:
IMultiPolygon mpoly = geom as IMultiPolygon;
Debug.Assert(mpoly != null);
List <List <Coordinate[]> > list = new List <List <Coordinate[]> >();
foreach (IPolygon mempoly in mpoly.Geometries)
{
list.Add(PolygonCoordiantes(mempoly));
}
serializer.Serialize(writer, list);
break;
case GeoJSONObjectType.GeometryCollection:
IGeometryCollection gc = geom as IGeometryCollection;
Debug.Assert(gc != null);
serializer.Serialize(writer, gc.Geometries);
break;
default:
List <Coordinate[]> coordinates = new List <Coordinate[]>();
foreach (IGeometry geometry in ((IGeometryCollection)geom).Geometries)
{
coordinates.Add(geometry.Coordinates);
}
serializer.Serialize(writer, coordinates);
break;
}
writer.WriteEndObject();
}
