Class Lucene41PostingsWriter

Concrete class that writes docId(maybe frq,pos,offset,payloads) list with postings format.

Postings list for each term will be stored separately.

Note

This API is experimental and might change in incompatible ways in the next release.

Inheritance
object
PostingsConsumer
PostingsWriterBase
Lucene41PostingsWriter
Implements
Inherited Members
Namespace: Lucene.Net.Codecs.Lucene41
Assembly: Lucene.Net.dll
Syntax
public sealed class Lucene41PostingsWriter : PostingsWriterBase, IDisposable

Constructors

Lucene41PostingsWriter(SegmentWriteState)

Creates a postings writer with 

PackedInts.COMPACT
Declaration
public Lucene41PostingsWriter(SegmentWriteState state)
Parameters
Type Name Description
SegmentWriteState state
See Also

Lucene41PostingsWriter(SegmentWriteState, float)

Creates a postings writer with the specified PackedInts overhead ratio

Declaration
public Lucene41PostingsWriter(SegmentWriteState state, float acceptableOverheadRatio)
Parameters
Type Name Description
SegmentWriteState state
float acceptableOverheadRatio
See Also

Methods

AddPosition(int, BytesRef, int, int)

Add a new position & payload

Declaration
public override void AddPosition(int position, BytesRef payload, int startOffset, int endOffset)
Parameters
Type Name Description
int position
BytesRef payload
int startOffset
int endOffset
Overrides
See Also

Dispose(bool)

Implementations must override and should dispose all resources used by this instance.

Declaration
protected override void Dispose(bool disposing)
Parameters
Type Name Description
bool disposing
Overrides
See Also

EncodeTerm(long[], DataOutput, FieldInfo, BlockTermState, bool)

Encode metadata as long[] and byte[]. absolute controls whether current term is delta encoded according to latest term. Usually elements in longs are file pointers, so each one always increases when a new term is consumed. out is used to write generic bytes, which are not monotonic.

NOTE: sometimes long[] might contain "don't care" values that are unused, e.g. the pointer to postings list may not be defined for some terms but is defined for others, if it is designed to inline some postings data in term dictionary. In this case, the postings writer should always use the last value, so that each element in metadata long[] remains monotonic.
Declaration
public override void EncodeTerm(long[] longs, DataOutput @out, FieldInfo fieldInfo, BlockTermState state, bool absolute)
Parameters
Type Name Description
long[] longs
DataOutput out
FieldInfo fieldInfo
BlockTermState state
bool absolute
Overrides
See Also

FinishDoc()

Called when we are done adding positions & payloads for each doc.

Declaration
public override void FinishDoc()
Overrides
See Also

FinishTerm(BlockTermState)

Called when we are done adding docs to this term.

Declaration
public override void FinishTerm(BlockTermState state)
Parameters
Type Name Description
BlockTermState state
Overrides
See Also

Init(IndexOutput)

Called once after startup, before any terms have been added. Implementations typically write a header to the provided termsOut.

Declaration
public override void Init(IndexOutput termsOut)
Parameters
Type Name Description
IndexOutput termsOut
Overrides
See Also

NewTermState()

Return a newly created empty TermState

Declaration
public override BlockTermState NewTermState()
Returns
Type Description
BlockTermState
Overrides
See Also

SetField(FieldInfo)

Sets the current field for writing, and returns the fixed length of long[] metadata (which is fixed per field), called when the writing switches to another field.

Declaration
public override int SetField(FieldInfo fieldInfo)
Parameters
Type Name Description
FieldInfo fieldInfo
Returns
Type Description
int
Overrides
See Also

StartDoc(int, int)

Adds a new doc in this term. freq will be -1 when term frequencies are omitted for the field.

Declaration
public override void StartDoc(int docId, int termDocFreq)
Parameters
Type Name Description
int docId
int termDocFreq
Overrides
See Also

StartTerm()

Start a new term. Note that a matching call to FinishTerm(BlockTermState) is done, only if the term has at least one document.

Declaration
public override void StartTerm()
Overrides
See Also

Implements

See Also