/// <summary>
/// Parses a string such as "Intersects(-10,20,-8,22) distErrPct=0.025".
/// </summary>
/// <param name="v"></param>
/// <param name="ctx"></param>
/// <returns></returns>
public SpatialArgs Parse(String v, SpatialContext ctx)
{
int idx = v.IndexOf('(');
int edx = v.LastIndexOf(')');
if (idx < 0 || idx > edx)
{
throw new ArgumentException("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 ArgumentException("missing body : " + v);
}
Shape shape = new ShapeReadWriter(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.DistErrPct = ReadDouble(aa["distErrPct"]); aa.Remove(DIST_ERR_PCT);
args.DistErr = ReadDouble(aa["distErr"]); aa.Remove(DIST_ERR);
if (aa.Count != 0)
{
throw new ArgumentException("unused parameters: " + aa);
}
}
}
args.Validate();
return args;
}
/// <summary>
///
/// </summary>
/// <param name="geo">Establishes geo vs cartesian / Euclidean.</param>
/// <param name="calculator">Optional; defaults to Haversine or cartesian depending on units.</param>
/// <param name="worldBounds">Optional; defaults to GEO_WORLDBOUNDS or MAX_WORLDBOUNDS depending on units.</param>
public SpatialContext(bool geo, DistanceCalculator calculator, Rectangle worldBounds)
{
this.geo = geo;
if (calculator == null)
{
calculator = IsGeo()
? (DistanceCalculator)new GeodesicSphereDistCalc.Haversine()
: new CartesianDistCalc();
}
this.calculator = calculator;
if (worldBounds == null)
{
worldBounds = IsGeo() ?
new RectangleImpl(-180, 180, -90, 90, this)
: new RectangleImpl(-Double.MaxValue, Double.MaxValue,-Double.MaxValue, Double.MaxValue, this);
}
else
{
if (IsGeo())
Debug.Assert(worldBounds.Equals(new RectangleImpl(-180, 180, -90, 90, this)));
if (worldBounds.GetCrossesDateLine())
throw new ArgumentException("worldBounds shouldn't cross dateline: " + worldBounds, "worldBounds");
}
//hopefully worldBounds' rect implementation is compatible
this.worldBounds = new RectangleImpl(worldBounds, this);
shapeReadWriter = MakeShapeReadWriter();
}
protected List<Document> getDocuments(String testDataFile)
{
IEnumerator<SampleData> sampleData = getSampleData(testDataFile);
var documents = new List<Document>();
while (sampleData.MoveNext())
{
SampleData data = sampleData.Current;
var document = new Document();
document.Add(new Field("id", data.id, Field.Store.YES, Field.Index.ANALYZED));
document.Add(new Field("name", data.name, Field.Store.YES, Field.Index.ANALYZED));
Shape shape = new ShapeReadWriter(ctx).ReadShape(data.shape);
shape = convertShapeFromGetDocuments(shape);
if (shape != null)
{
foreach (var f in strategy.CreateIndexableFields(shape))
{
document.Add(f);
}
if (storeShape)
document.Add(new Field(strategy.GetFieldName(), ctx.ToString(shape), Field.Store.YES,
Field.Index.NOT_ANALYZED_NO_NORMS));
}
documents.Add(document);
}
return documents;
}
protected void Init(DistanceUnits units, DistanceCalculator calculator, Rectangle worldBounds)
{
if (units == null)
throw new ArgumentException("units can't be null", "units");
this.units = units;
if (calculator == null)
{
calculator = IsGeo()
? (DistanceCalculator)new GeodesicSphereDistCalc.Haversine(units.EarthRadius())
: new CartesianDistCalc();
}
this.calculator = calculator;
if (worldBounds == null)
{
worldBounds = IsGeo() ? GEO_WORLDBOUNDS : MAX_WORLDBOUNDS;
}
else
{
if (IsGeo())
Debug.Assert(new RectangleImpl(worldBounds).Equals(GEO_WORLDBOUNDS));
if (worldBounds.GetCrossesDateLine())
throw new ArgumentException("worldBounds shouldn't cross dateline: " + worldBounds, "worldBounds");
}
//copy so we can ensure we have the right implementation
worldBounds = MakeRect(worldBounds.GetMinX(), worldBounds.GetMaxX(), worldBounds.GetMinY(), worldBounds.GetMaxY());
this.worldBounds = worldBounds;
shapeReadWriter = MakeShapeReadWriter();
this.maxCircleDistance = IsGeo() ? calculator.DegreesToDistance(180) : (double?)null;
}
