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.

Note

This API is experimental and might change in incompatible ways in the next release.

Inheritance
System.Object
SpatialStrategy
PrefixTreeStrategy
RecursivePrefixTreeStrategy
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
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
Lucene.Net.Search.Filter
Overrides
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ToString()

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