/// <summary>
/// Parses the specified <paramref name="input"/> string into an instance of <see cref="WktGeometry"/>.
/// </summary>
/// <param name="input">The input string to parse.</param>
/// <returns>An instance of <see cref="WktGeometry"/>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="input"/> is <c>null</c>.</exception>
/// <exception cref="WktInvalidFormatException"><paramref name="input"/> is not in a known format.</exception>
/// <exception cref="WktUnsupportedTypeException">type of <paramref name="input"/> is not supported.</exception>
public static WktGeometry Parse(string input)
{
if (string.IsNullOrWhiteSpace(input))
{
throw new ArgumentNullException(nameof(input));
}
string type = input.Split('(')[0].ToUpper().Trim();
if (string.IsNullOrWhiteSpace(type))
{
throw new WktInvalidFormatException(input);
}
switch (type)
{
case "POINT": return(WktPoint.Parse(input));
case "POLYGON": return(WktPolygon.Parse(input));
case "LINESTRING": return(WktLineString.Parse(input));
case "MULTIPOINT": return(WktMultiPoint.Parse(input));
case "MULTILINESTRING": return(WktMultiLineString.Parse(input));
case "MULTIPOLYGON": return(WktMultiPolygon.Parse(input));
default: throw new WktUnsupportedTypeException(type);
}
}
/// <summary>
/// Converts the specified Well Known Text <paramref name="point"/> to the corresponding point in the <strong>WGS 84</strong> coordinate system.
/// </summary>
/// <param name="point">The Well Known Text point.</param>
/// <returns>An instance of <see cref="IPoint"/> </returns>
/// <see>
/// <cref>https://en.wikipedia.org/wiki/World_Geodetic_System#WGS84</cref>
/// </see>
/// <exception cref="ArgumentNullException"><paramref name="point"/> is <c>null</c>.</exception>
public static IPoint ToPoint(this WktPoint point)
{
if (point == null)
{
throw new ArgumentNullException(nameof(point));
}
return(new Point(point.Y, point.X));
}
/// <summary>
/// Returns the <strong>Well Known Text</strong> string representation of the specified <paramref name="point"/>.
/// </summary>
/// <param name="point">The point to be converted.</param>
/// <param name="formatting">The formatting to be used.</param>
/// <param name="indentation">The indendatation to be used.</param>
/// <returns>The point formatted as a <strong>Well Known Text</strong> string.</returns>
protected string ToString(WktPoint point, WktFormatting formatting, int indentation)
{
if (formatting == WktFormatting.Indented)
{
throw new NotImplementedException("Indented formatting is currently not supported");
}
return(string.Format(CultureInfo.InvariantCulture, "({0} {1})", point.X, point.Y));
}
/// <summary>
/// Initializes a new instance from the specified array of <see cref="IPoint"/> <paramref name="coordinates"/>.
/// </summary>
/// <param name="coordinates">The coordinates.</param>
public WktPolygon(IPoint[][] coordinates)
{
if (coordinates == null)
{
throw new ArgumentNullException(nameof(coordinates));
}
Coordinates = new WktPoint[coordinates.Length][];
for (int i = 0; i < coordinates.Length; i++)
{
Coordinates[i] = new WktPoint[coordinates[i].Length];
for (int j = 0; j < Coordinates[i].Length; j++)
{
Coordinates[i][j] = new WktPoint(coordinates[i][j]);
}
}
}
/// <summary>
/// Converts the specified two-deimensional array of <paramref name="coordinates"/>.
/// </summary>
/// <param name="coordinates">The coordinates to be converted.</param>
/// <returns>A two-dimensional array of <see cref="WktPoint"/>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="coordinates"/> is <c>null</c>.</exception>
public static WktPoint[][] ToWkt(IPoint[][] coordinates)
{
if (coordinates == null)
{
throw new ArgumentNullException(nameof(coordinates));
}
WktPoint[][] temp = new WktPoint[coordinates.Length][];
for (int i = 0; i < coordinates.Length; i++)
{
temp[i] = new WktPoint[coordinates[i].Length];
for (int j = 0; j < temp[i].Length; j++)
{
temp[i][j] = new WktPoint(coordinates[i][j]);
}
}
return(temp);
}
/// <summary>
/// Initializes a new empty polygon.
/// </summary>
public WktPolygon()
{
Coordinates = new WktPoint[1][];
Coordinates[0] = new WktPoint[0];
}