Class QuadPrefixTree

A SpatialPrefixTree which uses a quad tree in which an indexed term will be generated for each cell, 'A', 'B', 'C', 'D'.

Note

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

Inheritance
System.Object
SpatialPrefixTree
QuadPrefixTree
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.Tree
Assembly: Lucene.Net.Spatial.dll
Syntax
public class QuadPrefixTree : SpatialPrefixTree

Constructors

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QuadPrefixTree(SpatialContext)

Initializes a new instance of QuadPrefixTree with the specified spatial context (ctx).

Declaration
public QuadPrefixTree(SpatialContext ctx)
Parameters
Type Name Description
Spatial4n.Context.SpatialContext ctx

The spatial context.
Exceptions
Type Condition
System.ArgumentNullException

ctx is null.
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QuadPrefixTree(SpatialContext, IRectangle, Int32)

Initializes a new instance of QuadPrefixTree with the specified spatial context (ctx), bounds and maxLevels.

Declaration
public QuadPrefixTree(SpatialContext ctx, IRectangle bounds, int maxLevels)
Parameters
Type Name Description
Spatial4n.Context.SpatialContext ctx

The spatial context.
Spatial4n.Shapes.IRectangle bounds

The bounded rectangle.
System.Int32 maxLevels

The maximum number of levels in the tree.
Exceptions
Type Condition
System.ArgumentNullException

ctx or bounds is null.
System.ArgumentOutOfRangeException

maxLevels is less than or equal to 0.
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QuadPrefixTree(SpatialContext, Int32)

Initializes a new instance of QuadPrefixTree with the specified spatial context (ctx) and maxLevels.

Declaration
public QuadPrefixTree(SpatialContext ctx, int maxLevels)
Parameters
Type Name Description
Spatial4n.Context.SpatialContext ctx

The spatial context.
System.Int32 maxLevels

The maximum number of levels in the tree.
Exceptions
Type Condition
System.ArgumentNullException

ctx is null.
System.ArgumentOutOfRangeException

maxLevels is less than or equal to 0.

Fields

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DEFAULT_MAX_LEVELS

Declaration
public const int DEFAULT_MAX_LEVELS = 12
Field Value
Type Description
System.Int32
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MAX_LEVELS_POSSIBLE

Declaration
public const int MAX_LEVELS_POSSIBLE = 50
Field Value
Type Description
System.Int32

Properties

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GridH

Declaration
public double GridH { get; }
Property Value
Type Description
System.Double

Methods

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GetCell(IPoint, Int32)

Declaration
protected override Cell GetCell(IPoint p, int level)
Parameters
Type Name Description
Spatial4n.Shapes.IPoint p
System.Int32 level
Returns
Type Description
Cell
Overrides
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GetCell(Byte[], Int32, Int32)

Declaration
public override Cell GetCell(byte[] bytes, int offset, int length)
Parameters
Type Name Description
System.Byte[] bytes
System.Int32 offset
System.Int32 length
Returns
Type Description
Cell
Overrides
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GetCell(String)

Declaration
public override Cell GetCell(string token)
Parameters
Type Name Description
System.String token
Returns
Type Description
Cell
Overrides
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GetLevelForDistance(Double)

Declaration
public override int GetLevelForDistance(double dist)
Parameters
Type Name Description
System.Double dist
Returns
Type Description
System.Int32
Overrides
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PrintInfo(TextWriter)

Declaration
public virtual void PrintInfo(TextWriter output)
Parameters
Type Name Description
System.IO.TextWriter output