Package org.apache.lucene.codecs.lucene41

Class Lucene41PostingsReader

java.lang.Object

org.apache.lucene.codecs.PostingsReaderBase

org.apache.lucene.codecs.lucene41.Lucene41PostingsReader

All Implemented Interfaces:

Closeable, AutoCloseable

public final class Lucene41PostingsReader
extends PostingsReaderBase

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

See Also:

for details

Constructor Summary

Constructors

Constructor	Description
Lucene41PostingsReader(Directory dir, FieldInfos fieldInfos, SegmentInfo segmentInfo, IOContext ioContext, String segmentSuffix)	Sole constructor.

Method Summary

Modifier and Type	Method	Description
void	close()
void	decodeTerm(long[] longs, DataInput in, FieldInfo fieldInfo, BlockTermState _termState, boolean absolute)	Actually decode metadata for next term
DocsEnum	docs(FieldInfo fieldInfo, BlockTermState termState, Bits liveDocs, DocsEnum reuse, int flags)	Must fully consume state, since after this call that TermState may be reused.
DocsAndPositionsEnum	docsAndPositions(FieldInfo fieldInfo, BlockTermState termState, Bits liveDocs, DocsAndPositionsEnum reuse, int flags)	Must fully consume state, since after this call that TermState may be reused.
void	init(IndexInput termsIn)	Performs any initialization, such as reading and verifying the header from the provided terms dictionary IndexInput.
BlockTermState	newTermState()	Return a newly created empty TermState
long	ramBytesUsed()	Returns approximate RAM bytes used

Methods inherited from class java.lang.Object

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

Constructor Detail

Lucene41PostingsReader

public Lucene41PostingsReader(Directory dir,
                              FieldInfos fieldInfos,
                              SegmentInfo segmentInfo,
                              IOContext ioContext,
                              String segmentSuffix)
                       throws IOException

Sole constructor.

Throws:

IOException

Method Detail

init

public void init(IndexInput termsIn)
          throws IOException

Description copied from class: PostingsReaderBase

Performs any initialization, such as reading and verifying the header from the provided terms dictionary IndexInput.

Specified by:

init in class PostingsReaderBase

Throws:

IOException

newTermState

public BlockTermState newTermState()

Description copied from class: PostingsReaderBase

Return a newly created empty TermState

Specified by:

newTermState in class PostingsReaderBase

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in class PostingsReaderBase

Throws:

IOException

decodeTerm

public void decodeTerm(long[] longs,
                       DataInput in,
                       FieldInfo fieldInfo,
                       BlockTermState _termState,
                       boolean absolute)
                throws IOException

Description copied from class: PostingsReaderBase

Actually decode metadata for next term

Specified by:

decodeTerm in class PostingsReaderBase

Throws:

IOException

See Also:

PostingsWriterBase.encodeTerm(long[], org.apache.lucene.store.DataOutput, org.apache.lucene.index.FieldInfo, org.apache.lucene.codecs.BlockTermState, boolean)

docs

public DocsEnum docs(FieldInfo fieldInfo,
                     BlockTermState termState,
                     Bits liveDocs,
                     DocsEnum reuse,
                     int flags)
              throws IOException

Description copied from class: PostingsReaderBase

Must fully consume state, since after this call that TermState may be reused.

Specified by:

docs in class PostingsReaderBase

Throws:

IOException

docsAndPositions

public DocsAndPositionsEnum docsAndPositions(FieldInfo fieldInfo,
                                             BlockTermState termState,
                                             Bits liveDocs,
                                             DocsAndPositionsEnum reuse,
                                             int flags)
                                      throws IOException

Description copied from class: PostingsReaderBase

Must fully consume state, since after this call that TermState may be reused.

Specified by:

docsAndPositions in class PostingsReaderBase

Throws:

IOException

ramBytesUsed

public long ramBytesUsed()

Description copied from class: PostingsReaderBase

Returns approximate RAM bytes used

Specified by:

ramBytesUsed in class PostingsReaderBase