Class SortedSetDocValuesReaderState

Wraps a Lucene.Net.Index.IndexReader and resolves ords using existing Lucene.Net.Index.SortedSetDocValues APIs without a separate taxonomy index. This only supports flat facets (dimension + label), and it makes faceting a bit slower, adds some cost at reopen time, but avoids managing the separate taxonomy index. It also requires less RAM than the taxonomy index, as it manages the flat (2-level) hierarchy more efficiently. In addition, the tie-break during faceting is now meaningful (in label sorted order).

NOTE: creating an instance of this class is somewhat costly, as it computes per-segment ordinal maps, so you should create it once and re-use that one instance for a given Lucene.Net.Index.IndexReader.

Inheritance

object

SortedSetDocValuesReaderState

DefaultSortedSetDocValuesReaderState

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Lucene.Net.Facet.SortedSet

Assembly: Lucene.Net.Facet.dll

Syntax

public abstract class SortedSetDocValuesReaderState

Constructors

SortedSetDocValuesReaderState()

Sole constructor.

Declaration

protected SortedSetDocValuesReaderState()

Properties

Count

Number of unique labels.

Declaration

public abstract int Count { get; }

Property Value

Type	Description
int

Field

Indexed field we are reading.

Declaration

public abstract string Field { get; }

Property Value

Type	Description
string

OrigReader

Returns top-level index reader.

Declaration

public abstract IndexReader OrigReader { get; }

Property Value

Type	Description
IndexReader

PrefixToOrdRange

Returns mapping from prefix to SortedSetDocValuesReaderState.OrdRange.

Declaration

public abstract IDictionary<string, SortedSetDocValuesReaderState.OrdRange> PrefixToOrdRange { get; }

Property Value

Type	Description
IDictionary<string, SortedSetDocValuesReaderState.OrdRange>

Methods

GetDocValues()

Return top-level doc values.

Declaration

public abstract SortedSetDocValues GetDocValues()

Returns

Type	Description
SortedSetDocValues

GetOrdRange(string)

Returns the SortedSetDocValuesReaderState.OrdRange for this dimension.

Declaration

public abstract SortedSetDocValuesReaderState.OrdRange GetOrdRange(string dim)

Parameters

Type	Name	Description
string	dim

Returns

Type	Description
SortedSetDocValuesReaderState.OrdRange