Class RecursivePrefixTreeStrategy

A PrefixTreeStrategy which uses AbstractVisitingPrefixTreeFilter. This strategy has support for searching non-point shapes (note: not tested). Even a query shape with distErrPct=0 (fully precise to the grid) should have good performance for typical data, unless there is a lot of indexed data coincident with the shape's edge.

This is a Lucene.NET EXPERIMENTAL API, use at your own risk
Inheritance
System.Object
SpatialStrategy
PrefixTreeStrategy
RecursivePrefixTreeStrategy
Inherited Members
Namespace: Lucene.Net.Spatial.Prefix
Assembly: Lucene.Net.Spatial.dll
Syntax
public class RecursivePrefixTreeStrategy : PrefixTreeStrategy

Constructors

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RecursivePrefixTreeStrategy(SpatialPrefixTree, String)

Declaration
public RecursivePrefixTreeStrategy(SpatialPrefixTree grid, string fieldName)
Parameters
Type Name Description
SpatialPrefixTree grid
System.String fieldName

Fields

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m_multiOverlappingIndexedShapes

See m_multiOverlappingIndexedShapes.

Declaration
protected bool m_multiOverlappingIndexedShapes
Field Value
Type Description
System.Boolean
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m_pointsOnly

True if only indexed points shall be supported. See Lucene.Net.Spatial.Prefix.IntersectsPrefixTreeFilter.hasIndexedLeaves.

Declaration
protected bool m_pointsOnly
Field Value
Type Description
System.Boolean

Properties

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PrefixGridScanLevel

Sets the grid level [1-maxLevels] at which indexed terms are scanned brute-force instead of by grid decomposition. By default this is maxLevels - 4. The final level, maxLevels, is always scanned. Value can be 1 to maxLevels.

Declaration
public virtual int PrefixGridScanLevel { get; set; }
Property Value
Type Description
System.Int32

Methods

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MakeFilter(SpatialArgs)

Declaration
public override Filter MakeFilter(SpatialArgs args)
Parameters
Type Name Description
SpatialArgs args
Returns
Type Description
Filter
Overrides
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ToString()

Declaration
public override string ToString()
Returns
Type Description
System.String
Overrides