/// <summary>
/// Parses a multilinestring text.
/// </summary>
/// <param name="tokens">The list of tokens.</param>
/// <param name="is3D">bool value indicating whether multilinestring being parsed has z-coordinate.</param>
/// <param name="isMeasured">bool value indicating whether multilinestring being parsed has m-value.</param>
/// <returns>A multilinestring specified by tokens.</returns>
/// <remarks><![CDATA[<multilinestring text> ::= <empty set> | <left paren><linestring text> {<comma> <linestring text>}* <right paren>]]></remarks>
private static MultiLineString ParseMultiLineStringText(WktTokensBuffer tokens, bool is3D, bool isMeasured)
{
WktToken t = tokens.Peek(true);
if (t.Type == TokenType.STRING && t.Value.ToUpperInvariant() == "EMPTY")
{
tokens.GetToken(true);
return(new MultiLineString());
}
WktReader.Expect(TokenType.LEFT_PARENTHESIS, tokens);
MultiLineString result = new MultiLineString(WktReader.ParseLineStrings(tokens, is3D, isMeasured));
WktReader.Expect(TokenType.RIGHT_PARENTHESIS, tokens);
return(result);
}
/// <summary>
/// Parses a polygon text.
/// </summary>
/// <param name="tokens">The list of tokens.</param>
/// <param name="is3D">bool value indicating whether polygon being parsed has z-coordinate.</param>
/// <param name="isMeasured">bool value indicating whether polygon being parsed has m-value.</param>
/// <returns>A polygon specified by tokens.</returns>
/// <remarks><![CDATA[<empty set> | <left paren> <linestring text> {<comma> <linestring text>}* <right paren>]]></remarks>
private static Polygon ParsePolygonText(WktTokensBuffer tokens, bool is3D, bool isMeasured)
{
WktToken t = tokens.Peek(true);
if (t.Type == TokenType.STRING && t.Value.ToUpperInvariant() == "EMPTY")
{
tokens.GetToken(true);
return(new Polygon());
}
WktReader.Expect(TokenType.LEFT_PARENTHESIS, tokens);
IEnumerable <LineString> linestrings = WktReader.ParseLineStrings(tokens, is3D, isMeasured);
Polygon result = new Polygon(linestrings.First().Coordinates);
foreach (var inner in linestrings.Skip(1))
{
result.InteriorRings.Add(inner.Coordinates);
}
WktReader.Expect(TokenType.RIGHT_PARENTHESIS, tokens);
return(result);
}