/// <summary>
/// Parses a MULTIPOLYGON shape from the raw string.
/// <code>
/// '(' polygon (',' polygon )* ')'
/// </code>
/// </summary>
protected virtual IShape ParseMulitPolygonShape(WktShapeParser.State state)
{
if (state.NextIfEmptyAndSkipZM())
{
return(m_ctx.MakeCollection(new List <IShape>()));
}
IList <IShape> polygons = new List <IShape>();
state.NextExpect('(');
do
{
polygons.Add(ParsePolygonShape(state));
} while (state.NextIf(','));
state.NextExpect(')');
return(m_ctx.MakeCollection(polygons));
}
public virtual void TestParsePolygon()
{
IShape polygonNoHoles = new PolygonBuilder(ctx)
.Point(100, 0)
.Point(101, 0)
.Point(101, 1)
.Point(100, 2)
.Point(100, 0)
.Build();
string polygonNoHolesSTR = "POLYGON ((100 0, 101 0, 101 1, 100 2, 100 0))";
AssertParses(polygonNoHolesSTR, polygonNoHoles);
AssertParses("POLYGON((100 0,101 0,101 1,100 2,100 0))", polygonNoHoles);
AssertParses("GEOMETRYCOLLECTION ( " + polygonNoHolesSTR + ")",
ctx.MakeCollection(new List <IShape>(new IShape[] { polygonNoHoles })));
IShape polygonWithHoles = new PolygonBuilder(ctx)
.Point(100, 0)
.Point(101, 0)
.Point(101, 1)
.Point(100, 1)
.Point(100, 0)
.NewHole()
.Point(100.2, 0.2)
.Point(100.8, 0.2)
.Point(100.8, 0.8)
.Point(100.2, 0.8)
.Point(100.2, 0.2)
.EndHole()
.Build();
AssertParses("POLYGON ((100 0, 101 0, 101 1, 100 1, 100 0), (100.2 0.2, 100.8 0.2, 100.8 0.8, 100.2 0.8, 100.2 0.2))", polygonWithHoles);
GeometryFactory gf = ctx.GeometryFactory;
AssertParses("POLYGON EMPTY", ctx.MakeShape(
gf.CreatePolygon(gf.CreateLinearRing(new Coordinate[] { }), null)
));
}
