Class TermContext

Maintains a IndexReader TermState view over IndexReader instances containing a single term. The TermContext doesn't track if the given TermState objects are valid, neither if the TermState instances refer to the same terms in the associated readers.

This is a Lucene.NET EXPERIMENTAL API, use at your own risk

Inheritance

System.Object

TermContext

Namespace: Lucene.Net.Index

Assembly: Lucene.Net.dll

Syntax

public sealed class TermContext : object

Constructors

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TermContext(IndexReaderContext)

Creates an empty TermContext from a IndexReaderContext

Declaration

public TermContext(IndexReaderContext context)

Parameters

Type	Name	Description
IndexReaderContext	context

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TermContext(IndexReaderContext, TermState, Int32, Int32, Int64)

Creates a TermContext with an initial TermState, IndexReader pair.

Declaration

public TermContext(IndexReaderContext context, TermState state, int ord, int docFreq, long totalTermFreq)

Parameters

Type	Name	Description
IndexReaderContext	context
TermState	state
System.Int32	ord
System.Int32	docFreq
System.Int64	totalTermFreq

Properties

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DocFreq

expert: only available for queries that want to lie about docfreq

This is a Lucene.NET INTERNAL API, use at your own risk

Declaration

public int DocFreq { get; }

Property Value

Type	Description
System.Int32

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TopReaderContext

Holds the IndexReaderContext of the top-level IndexReader, used internally only for asserting.

This is a Lucene.NET INTERNAL API, use at your own risk

Declaration

public IndexReaderContext TopReaderContext { get; }

Property Value

Type	Description
IndexReaderContext

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TotalTermFreq

Returns the accumulated term frequency of all TermState instances passed to Register(TermState, Int32, Int32, Int64).

Declaration

public long TotalTermFreq { get; }

Property Value

Type	Description
System.Int64	the accumulated term frequency of all TermState instances passed to Register(TermState, Int32, Int32, Int64).

Methods

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Build(IndexReaderContext, Term)

Creates a TermContext from a top-level IndexReaderContext and the given Term. this method will lookup the given term in all context's leaf readers and register each of the readers containing the term in the returned TermContext using the leaf reader's ordinal.

Note: the given context must be a top-level context.

Declaration

public static TermContext Build(IndexReaderContext context, Term term)

Parameters

Type	Name	Description
IndexReaderContext	context
Term	term

Returns

Type	Description
TermContext

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Clear()

Clears the TermContext internal state and removes all registered TermStates

Declaration

public void Clear()

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Get(Int32)

Returns the TermState for an leaf ordinal or null if no TermState for the ordinal was registered.

Declaration

public TermState Get(int ord)

Parameters

Type	Name	Description
System.Int32	ord	The readers leaf ordinal to get the TermState for.

Returns

Type	Description
TermState	The TermState for the given readers ord or `null` if no TermState for the reader was registered

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Register(TermState, Int32, Int32, Int64)

Registers and associates a TermState with an leaf ordinal. The leaf ordinal should be derived from a IndexReaderContext's leaf ord.

Declaration

public void Register(TermState state, int ord, int docFreq, long totalTermFreq)

Parameters

Type	Name	Description
TermState	state
System.Int32	ord
System.Int32	docFreq
System.Int64	totalTermFreq