public bool TryWriteGeometry(JsonWriter writer, object value, JsonSerializer serializer)
{
ObjectType geomType = _shapeConverter.GetObjectType(value);
if (!_shapeConverter.CanConvert(geomType))
{
return(false);
}
switch (geomType)
{
case ObjectType.Point:
case ObjectType.LineString:
case ObjectType.Polygon:
case ObjectType.MultiPoint:
case ObjectType.MultiLineString:
case ObjectType.MultiPolygon:
break;
default:
return(false);
}
writer.WriteStartObject();
writer.WritePropertyName("type");
writer.WriteValue(Enum.GetName(typeof(ObjectType), geomType));
writer.WritePropertyName("coordinates");
switch (geomType)
{
case ObjectType.Point:
WriteJsonCoordinate(writer, _shapeConverter.FromPoint(value));
break;
case ObjectType.LineString:
WriteJsonCoordinates(writer, _shapeConverter.FromLineString(value));
break;
case ObjectType.MultiPoint:
WriteJsonCoordinates(writer, _shapeConverter.FromMultiPoint(value));
break;
case ObjectType.Polygon:
WriteJsonCoordinatesEnumerable(writer, _shapeConverter.FromPolygon(value));
break;
case ObjectType.MultiLineString:
WriteJsonCoordinatesEnumerable(writer, _shapeConverter.FromMultiLineString(value));
break;
case ObjectType.MultiPolygon:
WriteJsonCoordinatesEnumerable2(writer, _shapeConverter.FromMultiPolygon(value));
break;
}
writer.WriteEndObject();
return(true);
}
private void AppendPolygon(StringBuilder builder, object polygon)
{
var p = _shapeConverter.FromPolygon(polygon);
builder.Append("POLYGON");
AppendDimensions(builder, GetDimensions(p));
builder.Append(" ");
AppendPolygonInner(builder, p);
}
private object ParsePolygonInner(WktTokenQueue tokens, Dimensions dimensions)
{
if (tokens.NextTokenIs("EMPTY"))
{
tokens.Dequeue();
return(_shapeConverter.FromPolygon(new CoordinateInfo[0][][]));
}
var linestrings = ParseLineStrings(tokens, dimensions);
return(_shapeConverter.ToPolygon(linestrings));
}