Class SerializedDVStrategy

A SpatialStrategy based on serializing a Shape stored into BinaryDocValues. This is not at all fast; it's designed to be used in conjuction with another index based SpatialStrategy that is approximated(like RecursivePrefixTreeStrategy) to add precision or eventually make more specific / advanced calculations on the per-document geometry. The serialization uses Spatial4j's Spatial4n.Core.IO.BinaryCodec.

This is a Lucene.NET EXPERIMENTAL API, use at your own risk
Inheritance
System.Object
SpatialStrategy
SerializedDVStrategy
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.Serialized
Assembly: Lucene.Net.Spatial.dll
Syntax
public class SerializedDVStrategy : SpatialStrategy

Constructors

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SerializedDVStrategy(SpatialContext, String)

Constructs the spatial strategy with its mandatory arguments.

Declaration
public SerializedDVStrategy(SpatialContext ctx, string fieldName)
Parameters
Type Name Description
Spatial4n.Core.Context.SpatialContext ctx
System.String fieldName

Methods

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CreateIndexableFields(IShape)

Declaration
public override Field[] CreateIndexableFields(IShape shape)
Parameters
Type Name Description
Spatial4n.Core.Shapes.IShape shape
Returns
Type Description
Field[]
Overrides
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MakeDistanceValueSource(IPoint, Double)

Declaration
public override ValueSource MakeDistanceValueSource(IPoint queryPoint, double multiplier)
Parameters
Type Name Description
Spatial4n.Core.Shapes.IPoint queryPoint
System.Double multiplier
Returns
Type Description
Lucene.Net.Queries.Function.ValueSource
Overrides
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MakeFilter(SpatialArgs)

Returns a Lucene.Net.Search.Filter that should be used with QUERY_FIRST_FILTER_STRATEGY. Use in another manner is likely to result in an System.NotSupportedException to prevent misuse because the filter can't efficiently work via iteration.

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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MakeQuery(SpatialArgs)

Declaration
public override ConstantScoreQuery MakeQuery(SpatialArgs args)
Parameters
Type Name Description
SpatialArgs args
Returns
Type Description
Lucene.Net.Search.ConstantScoreQuery
Overrides
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MakeShapeValueSource()

Provides access to each shape per document as a ValueSource in which Lucene.Net.Queries.Function.FunctionValues.ObjectVal(System.Int32) returns a Spatial4n.Core.Shapes.IShape.

Declaration
public virtual ValueSource MakeShapeValueSource()
Returns
Type Description
Lucene.Net.Queries.Function.ValueSource