public SpatialField(string fieldName, SpatialOptions options)
{
this.options = options;
ntsContext = CreateNtsContext(options);
shapeStringReadWriter = new ShapeStringReadWriter(options, ntsContext);
strategy = CreateStrategy(fieldName, options, ntsContext);
}
private NtsSpatialContext CreateNtsContext(SpatialOptions opt)
{
if (opt.Type == SpatialFieldType.Cartesian)
{
var nts = new NtsSpatialContext(new GeometryFactory(), false, new CartesianDistCalc(), null);
nts.GetWorldBounds().Reset(opt.MinX, opt.MaxX, opt.MinY, opt.MaxY);
return nts;
}
return GeoContext;
}
private SpatialStrategy CreateStrategy(string fieldName, SpatialOptions opt, NtsSpatialContext context)
{
switch (opt.Strategy)
{
case SpatialSearchStrategy.GeohashPrefixTree:
return new RecursivePrefixTreeStrategyThatSupportsWithin(new GeohashPrefixTree(context, opt.MaxTreeLevel), fieldName);
case SpatialSearchStrategy.QuadPrefixTree:
return new RecursivePrefixTreeStrategyThatSupportsWithin(new QuadPrefixTree(context, opt.MaxTreeLevel), fieldName);
case SpatialSearchStrategy.BoundingBox:
return new BBoxStrategyThatSupportsAllShapes(context, fieldName);
}
return null;
}
private NtsShapeReadWriter CreateNtsShapeReadWriter(SpatialOptions opt, NtsSpatialContext ntsContext)
{
if (opt.Type == SpatialFieldType.Cartesian)
return new NtsShapeReadWriter(ntsContext, false);
return geoShapeReadWriter ?? (geoShapeReadWriter = new NtsShapeReadWriter(ntsContext, false));
}
public ShapeStringReadWriter(SpatialOptions options, NtsSpatialContext context)
{
this.options = options;
this.ntsShapeReadWriter = CreateNtsShapeReadWriter(options, context);
this.shapeStringConverter = new ShapeStringConverter(options);
}
public ShapeStringConverter(SpatialOptions options)
{
this.options = options;
}
