org.apache.lucene.codecs.lucene41

Class Lucene41PostingsWriter

java.lang.Object

org.apache.lucene.codecs.PostingsConsumer

org.apache.lucene.codecs.PostingsWriterBase

org.apache.lucene.codecs.lucene41.Lucene41PostingsWriter

All Implemented Interfaces:

Closeable

public final class Lucene41PostingsWriter
extends PostingsWriterBase

Concrete class that writes docId(maybe frq,pos,offset,payloads) list with postings format. Postings list for each term will be stored separately.

See Also:

for details about skipping setting and postings layout.

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

Constructor Summary

Constructors

Constructor and Description
Lucene41PostingsWriter(SegmentWriteState state) Creates a postings writer with PackedInts.COMPACT
Lucene41PostingsWriter(SegmentWriteState state, float acceptableOverheadRatio) Creates a postings writer with the specified PackedInts overhead ratio

Method Summary

Methods

Modifier and Type	Method and Description
void	addPosition(int position, BytesRef payload, int startOffset, int endOffset) Add a new position & payload
void	close()
void	finishDoc() Called when we are done adding positions & payloads for each doc.
void	finishTerm(TermStats stats) Called when we are done adding docs to this term
void	flushTermsBlock(int start, int count) Flush count terms starting at start "backwards", as a block.
void	setField(FieldInfo fieldInfo) Called when the writing switches to another field.
void	start(IndexOutput termsOut) Called once after startup, before any terms have been added.
void	startDoc(int docID, int termDocFreq) Adds a new doc in this term.
void	startTerm() Start a new term.

Methods inherited from class org.apache.lucene.codecs.PostingsConsumer

merge

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Lucene41PostingsWriter

public Lucene41PostingsWriter(SegmentWriteState state,
                      float acceptableOverheadRatio)
                       throws IOException

Creates a postings writer with the specified PackedInts overhead ratio

Throws:

IOException

Lucene41PostingsWriter

public Lucene41PostingsWriter(SegmentWriteState state)
                       throws IOException

Creates a postings writer with PackedInts.COMPACT

Throws:

IOException

Method Detail

start

public void start(IndexOutput termsOut)
           throws IOException

Description copied from class: PostingsWriterBase

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

Specified by:

start in class PostingsWriterBase

Throws:

IOException

setField

public void setField(FieldInfo fieldInfo)

Description copied from class: PostingsWriterBase

Called when the writing switches to another field.

Specified by:

setField in class PostingsWriterBase

startTerm

public void startTerm()

Description copied from class: PostingsWriterBase

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

Specified by:

startTerm in class PostingsWriterBase

startDoc

public void startDoc(int docID,
            int termDocFreq)
              throws IOException

Description copied from class: PostingsConsumer

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

Specified by:

startDoc in class PostingsConsumer

Throws:

IOException

addPosition

public void addPosition(int position,
               BytesRef payload,
               int startOffset,
               int endOffset)
                 throws IOException

Add a new position & payload

Specified by:

addPosition in class PostingsConsumer

Throws:

IOException

finishDoc

public void finishDoc()
               throws IOException

Description copied from class: PostingsConsumer

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

Specified by:

finishDoc in class PostingsConsumer

Throws:

IOException

finishTerm

public void finishTerm(TermStats stats)
                throws IOException

Called when we are done adding docs to this term

Specified by:

finishTerm in class PostingsWriterBase

Throws:

IOException

flushTermsBlock

public void flushTermsBlock(int start,
                   int count)
                     throws IOException

Description copied from class: PostingsWriterBase

Flush count terms starting at start "backwards", as a block. start is a negative offset from the end of the terms stack, ie bigger start means further back in the stack.

Specified by:

flushTermsBlock in class PostingsWriterBase

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in class PostingsWriterBase

Throws:

IOException