Class SpatialPrefixTreeFactory

Abstract Factory for creating SpatialPrefixTree instances with useful defaults and passed on configurations defined in a .

This is a Lucene.NET EXPERIMENTAL API, use at your own risk
Inheritance
System.Object
SpatialPrefixTreeFactory
GeohashPrefixTree.Factory
QuadPrefixTree.Factory
Namespace: Lucene.Net.Spatial.Prefix.Tree
Assembly: Lucene.Net.Spatial.dll
Syntax
public abstract class SpatialPrefixTreeFactory : object

Fields

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m_args

Declaration
protected IDictionary<string, string> m_args
Field Value
Type Description
IDictionary<System.String, System.String>
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m_ctx

Declaration
protected SpatialContext m_ctx
Field Value
Type Description
SpatialContext
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m_maxLevels

Declaration
protected int? m_maxLevels
Field Value
Type Description
System.Nullable<System.Int32>
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MAX_DIST_ERR

Declaration
public const string MAX_DIST_ERR = null
Field Value
Type Description
System.String
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MAX_LEVELS

Declaration
public const string MAX_LEVELS = null
Field Value
Type Description
System.String
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PREFIX_TREE

Declaration
public const string PREFIX_TREE = null
Field Value
Type Description
System.String

Methods

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GetLevelForDistance(Double)

Calls GetLevelForDistance(Double).

Declaration
protected abstract int GetLevelForDistance(double degrees)
Parameters
Type Name Description
System.Double degrees
Returns
Type Description
System.Int32
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Init(IDictionary<String, String>, SpatialContext)

Declaration
protected virtual void Init(IDictionary<string, string> args, SpatialContext ctx)
Parameters
Type Name Description
IDictionary<System.String, System.String> args
SpatialContext ctx
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InitMaxLevels()

Declaration
protected virtual void InitMaxLevels()
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MakeSPT(IDictionary<String, String>, SpatialContext)

The factory is looked up via "prefixTree" in args, expecting "geohash" or "quad".

Declaration
public static SpatialPrefixTree MakeSPT(IDictionary<string, string> args, SpatialContext ctx)
Parameters
Type Name Description
IDictionary<System.String, System.String> args
SpatialContext ctx
Returns
Type Description
SpatialPrefixTree
Remarks

The factory is looked up via "prefixTree" in args, expecting "geohash" or "quad". If its neither of these, then "geohash" is chosen for a geo context, otherwise "quad" is chosen.

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NewSPT()

Declaration
protected abstract SpatialPrefixTree NewSPT()
Returns
Type Description
SpatialPrefixTree