Class SortedSetDocValuesFacetCounts

Compute facets counts from previously indexed SortedSetDocValuesFacetField, without require a separate taxonomy index. Faceting is a bit slower (~25%), and there is added cost on every Lucene.Net.Index.IndexReader open to create a new SortedSetDocValuesReaderState. Furthermore, this does not support hierarchical facets; only flat (dimension + label) facets, but it uses quite a bit less RAM to do so.

NOTE: this class should be instantiated and then used from a single thread, because it holds a thread-private instance of Lucene.Net.Index.SortedSetDocValues.

NOTE:: tie-break is by unicode sort order @lucene.experimental

Inheritance
System.Object
Facets
SortedSetDocValuesFacetCounts
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)
System.Object.ToString()
Namespace: Lucene.Net.Facet.SortedSet
Assembly: Lucene.Net.Facet.dll
Syntax
public class SortedSetDocValuesFacetCounts : Facets

Constructors

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SortedSetDocValuesFacetCounts(SortedSetDocValuesReaderState, FacetsCollector)

Sparse faceting: returns any dimension that had any hits, topCount labels per dimension.

Declaration
public SortedSetDocValuesFacetCounts(SortedSetDocValuesReaderState state, FacetsCollector hits)
Parameters
Type Name Description
SortedSetDocValuesReaderState state
FacetsCollector hits

Methods

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GetAllDims(Int32)

Declaration
public override IList<FacetResult> GetAllDims(int topN)
Parameters
Type Name Description
System.Int32 topN
Returns
Type Description
System.Collections.Generic.IList<FacetResult>
Overrides
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GetSpecificValue(String, String[])

Declaration
public override float GetSpecificValue(string dim, params string[] path)
Parameters
Type Name Description
System.String dim
System.String[] path
Returns
Type Description
System.Single
Overrides
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GetTopChildren(Int32, String, String[])

Declaration
public override FacetResult GetTopChildren(int topN, string dim, params string[] path)
Parameters
Type Name Description
System.Int32 topN
System.String dim
System.String[] path
Returns
Type Description
FacetResult
Overrides