/// <summary> /// Parses a coordinate. /// </summary> /// <param name="tokens">The list of tokens.</param> /// <param name="is3D">bool value indicating whether coordinate being parsed had z-coordinate.</param> /// <param name="isMeasured">bool value indicating whether coordinate beeing parsed has m-value.</param> /// <returns>A coordinate specified by tokens.</returns> /// <remarks><![CDATA[<x> <y> {<z>} {<m>}]]></remarks> private static Coordinate ParseCoordinate(WktTokensBuffer tokens, bool is3D, bool isMeasured) { WktToken t = WktReader.Expect(TokenType.NUMBER, tokens); double x = double.Parse(t.Value, _invarianCulture); WktReader.Expect(TokenType.WHITESPACE, tokens); t = WktReader.Expect(TokenType.NUMBER, tokens); double y = double.Parse(t.Value, _invarianCulture); double z = double.NaN; double m = double.NaN; if (is3D) { WktReader.Expect(TokenType.WHITESPACE, tokens); t = WktReader.Expect(TokenType.NUMBER, tokens); z = double.Parse(t.Value, _invarianCulture); } if (isMeasured) { WktReader.Expect(TokenType.WHITESPACE, tokens); t = WktReader.Expect(TokenType.NUMBER, tokens); m = double.Parse(t.Value, _invarianCulture); } return(new Coordinate(x, y, z, m)); }
/// <summary> /// Parses a GeometryCollection text. /// </summary> /// <param name="tokens">The list of tokens.</param> /// <param name="is3D">bool value indicating whether GeometryCollection being parsed has z-coordinate.</param> /// <param name="isMeasured">bool value indicating whether GeometryCollection being parsed has m-value.</param> /// <returns>A GeometryCollection specified by tokens.</returns> /// <remarks><![CDATA[<GeometryCollection text> ::= <empty set> | <left paren> <geometry tagged text> {<comma> <geometry tagged text>}* <right paren>]]></remarks> private static GeometryCollection <Geometry> ParseGeometryCollectionText(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 GeometryCollection <Geometry>()); } WktReader.Expect(TokenType.LEFT_PARENTHESIS, tokens); GeometryCollection <Geometry> result = new GeometryCollection <Geometry>(); result.Geometries.Add(WktReader.ParseGeometryTaggedText(tokens)); t = tokens.Peek(true); while (t.Type == TokenType.COMMA) { tokens.GetToken(true); result.Geometries.Add(WktReader.ParseGeometryTaggedText(tokens)); t = tokens.Peek(true); } WktReader.Expect(TokenType.RIGHT_PARENTHESIS, tokens); return(result); }
/// <summary> /// Parses a multipolygon text. /// </summary> /// <param name="tokens">The list of tokens.</param> /// <param name="is3D">bool value indicating whether multipolygon being parsed has z-coordinate.</param> /// <param name="isMeasured">bool value indicating whether multipolygon being parsed has m-value.</param> /// <returns>A multipolygon specified by tokens.</returns> /// <remarks><![CDATA[<multipolygon text> ::= <empty set> | <left paren> <polygon text> {<comma> <polygon text>}* <right paren>]]></remarks> private static MultiPolygon ParseMultiPolygonText(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 MultiPolygon()); } WktReader.Expect(TokenType.LEFT_PARENTHESIS, tokens); MultiPolygon result = new MultiPolygon(WktReader.ParsePolygons(tokens, is3D, isMeasured)); WktReader.Expect(TokenType.RIGHT_PARENTHESIS, tokens); return(result); }
/// <summary> /// Parses a linestring text. /// </summary> /// <param name="tokens">The list of tokens.</param> /// <param name="is3D">bool value indicating whether linestring being parsed has z-coordinate.</param> /// <param name="isMeasured">bool value indicating whether linestring being parsed has m-value.</param> /// <returns>A linestring specified by tokens.</returns> /// <remarks><![CDATA[<empty set> | <left paren> <point> {<comma> <point>}* <right paren>]]></remarks> private static LineString ParseLineStringText(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 LineString()); } WktReader.Expect(TokenType.LEFT_PARENTHESIS, tokens); IEnumerable <Coordinate> coords = WktReader.ParseCoordinates(tokens, is3D, isMeasured); WktReader.Expect(TokenType.RIGHT_PARENTHESIS, tokens); return(new LineString(coords)); }
/// <summary> /// Parses a multipolyugon tagged text. /// </summary> /// <param name="tokens">The list of tokens.</param> /// <returns>A GeometryCollection specified by tokens.</returns> /// <remarks><![CDATA[<GeometryCollection tagged text> ::= GeometryCollection {z}{m} <GeometryCollection text>]]></remarks> private static GeometryCollection <Geometry> ParseGeometryCollectionTaggedText(WktTokensBuffer tokens) { WktReader.Expect("geometrycollection", tokens); WktReader.Expect(TokenType.WHITESPACE, tokens); bool is3D = false; bool isMeasured = false; WktToken t = tokens.Peek(true); if (WktReader.TryParseDimensions(t, out is3D, out isMeasured)) { tokens.GetToken(true); WktReader.Expect(TokenType.WHITESPACE, tokens); } return(WktReader.ParseGeometryCollectionText(tokens, is3D, isMeasured)); }
/// <summary> /// Parses a multipolyugon tagged text. /// </summary> /// <param name="tokens">The list of tokens.</param> /// <returns>A multipolygon specified by tokens.</returns> /// <remarks><![CDATA[<multipolygon tagged text> ::= multipolygon {z}{m} <multipolygon text>]]></remarks> private static MultiPolygon ParseMultiPolygonTaggedText(WktTokensBuffer tokens) { WktReader.Expect("multipolygon", tokens); WktReader.Expect(TokenType.WHITESPACE, tokens); bool is3D = false; bool isMeasured = false; WktToken t = tokens.Peek(true); if (WktReader.TryParseDimensions(t, out is3D, out isMeasured)) { tokens.GetToken(true); WktReader.Expect(TokenType.WHITESPACE, tokens); } return(WktReader.ParseMultiPolygonText(tokens, is3D, isMeasured)); }
/// <summary> /// Parses a linestring tagged text. /// </summary> /// <param name="tokens">The list of tokens.</param> /// <returns>A linestring specified by tokens.</returns> /// <remarks><![CDATA[<linestring tagged text> ::= linestring {z}{m} <linestring text>]]></remarks> private static LineString ParseLineStringTaggedText(WktTokensBuffer tokens) { WktReader.Expect("linestring", tokens); WktReader.Expect(TokenType.WHITESPACE, tokens); bool is3D = false; bool isMeasured = false; WktToken t = tokens.Peek(true); if (WktReader.TryParseDimensions(t, out is3D, out isMeasured)) { tokens.GetToken(true); WktReader.Expect(TokenType.WHITESPACE, tokens); } return(WktReader.ParseLineStringText(tokens, is3D, isMeasured)); }
/// <summary> /// Parses a series of coordinate. /// </summary> /// <param name="tokens">The list of tokens.</param> /// <param name="is3D">bool value indicating whether coordinate being parsed had z-coordinate.</param> /// <param name="isMeasured">bool value indicating whether coordinate beeing parsed has m-value.</param> /// <returns>A list of coordinates specified by tokens.</returns> private static IEnumerable <Coordinate> ParseCoordinates(WktTokensBuffer tokens, bool is3D, bool isMeasured) { List <Coordinate> coordinates = new List <Coordinate>(); coordinates.Add(WktReader.ParseCoordinate(tokens, is3D, isMeasured)); WktToken t = tokens.Peek(true); while (t.Type == TokenType.COMMA) { tokens.GetToken(true); WktReader.Expect(TokenType.WHITESPACE, tokens); coordinates.Add(WktReader.ParseCoordinate(tokens, is3D, isMeasured)); t = tokens.Peek(true); } return(coordinates); }
/// <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); }