public static Query MakeQuery(SpatialStrategy spatialStrategy, string shapeWKT, SpatialRelation relation,
double distanceErrorPct = 0.025)
{
SpatialOperation spatialOperation;
Shape shape = ShapeReadWriter.ReadShape(shapeWKT);
switch (relation)
{
case SpatialRelation.Within:
spatialOperation = SpatialOperation.IsWithin;
break;
case SpatialRelation.Contains:
spatialOperation = SpatialOperation.Contains;
break;
case SpatialRelation.Disjoint:
spatialOperation = SpatialOperation.IsDisjointTo;
break;
case SpatialRelation.Intersects:
spatialOperation = SpatialOperation.Intersects;
break;
case SpatialRelation.Nearby:
var nearbyArgs = new SpatialArgs(SpatialOperation.IsWithin, shape);
nearbyArgs.SetDistPrecision(distanceErrorPct);
// only sort by this, do not filter
return new FunctionQuery(spatialStrategy.MakeValueSource(nearbyArgs));
default:
throw new ArgumentOutOfRangeException("relation");
}
var args = new SpatialArgs(spatialOperation, shape);
args.SetDistPrecision(distanceErrorPct);
return spatialStrategy.MakeQuery(args);
}
public SpatialArgs Parse(String v, SpatialContext ctx)
{
int idx = v.IndexOf('(');
int edx = v.LastIndexOf(')');
if (idx < 0 || idx > edx)
{
throw new InvalidSpatialArgument("missing parens: " + v);
}
SpatialOperation op = SpatialOperation.Get(v.Substring(0, idx).Trim());
//Substring in .NET is (startPosn, length), But in Java it's (startPosn, endPosn)
//see http://docs.oracle.com/javase/1.4.2/docs/api/java/lang/String.html#substring(int, int)
String body = v.Substring(idx + 1, edx - (idx + 1)).Trim();
if (body.Length < 1)
{
throw new InvalidSpatialArgument("missing body : " + v);
}
var shape = ctx.ReadShape(body);
var args = new SpatialArgs(op, shape);
if (v.Length > (edx + 1))
{
body = v.Substring(edx + 1).Trim();
if (body.Length > 0)
{
Dictionary<String, String> aa = ParseMap(body);
args.Min = ReadDouble(aa["min"]);
args.Max = ReadDouble(aa["max"]);
args.SetDistPrecision(ReadDouble(aa["distPrec"]));
if (aa.Count > 3)
{
throw new InvalidSpatialArgument("unused parameters: " + aa);
}
}
}
return args;
}
