Package org.apache.lucene.codecs.uniformsplit.sharedterms

Class STMergingBlockReader

java.lang.Object

org.apache.lucene.index.TermsEnum

org.apache.lucene.index.BaseTermsEnum

org.apache.lucene.codecs.uniformsplit.BlockReader

org.apache.lucene.codecs.uniformsplit.sharedterms.STBlockReader

org.apache.lucene.codecs.uniformsplit.sharedterms.STMergingBlockReader

All Implemented Interfaces:

Accountable, BytesRefIterator

public class STMergingBlockReader
extends STBlockReader

TermsEnum used when merging segments, to enumerate the terms of an input segment and get all the fields TermStates of each term.

It only supports calls to next() and no seek method.

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

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.index.TermsEnum

TermsEnum.SeekStatus

Field Summary

Fields inherited from class org.apache.lucene.codecs.uniformsplit.sharedterms.STBlockReader

fieldInfos

Fields inherited from class org.apache.lucene.codecs.uniformsplit.BlockReader

blockDecoder, blockFirstLineStart, blockHeader, blockHeaderReader, blockInput, blockLine, blockLineReader, blockReadBuffer, blockStartFP, dictionaryBrowser, dictionaryBrowserSupplier, fieldMetadata, forcedTerm, lineIndexInBlock, postingsReader, scratchBlockBytes, scratchBlockLine, scratchTermState, termState, termStateForced, termStateSerializer, termStatesReadBuffer

Fields inherited from class org.apache.lucene.index.TermsEnum

EMPTY

Fields inherited from interface org.apache.lucene.util.Accountable

NULL_ACCOUNTABLE

Constructor Summary

Constructors

Constructor	Description
STMergingBlockReader(IndexDictionary.BrowserSupplier dictionaryBrowserSupplier, IndexInput blockInput, PostingsReaderBase postingsReader, FieldMetadata fieldMetadata, BlockDecoder blockDecoder, FieldInfos fieldInfos)

Method Summary

Modifier and Type	Method	Description
BytesRef	next()
PostingsEnum	postings(String fieldName, BlockTermState termState, PostingsEnum reuse, int flags)	Creates a new PostingsEnum for the provided field and BlockTermState.
void	readFieldTermStatesMap(Map<String,BlockTermState> fieldTermStatesMap)	Reads all the fields TermStates of the current term and put them in the provided map.
protected BlockTermState	readTermStateIfNotRead()	Reads the BlockTermState if it is not already set.
TermsEnum.SeekStatus	seekCeil(BytesRef searchedTerm)
void	seekExact(long ord)	Not supported.
boolean	seekExact(BytesRef searchedTerm)
void	seekExact(BytesRef term, TermState state)	Positions this BlockReader without re-seeking the term dictionary.

Methods inherited from class org.apache.lucene.codecs.uniformsplit.sharedterms.STBlockReader

createBlockLineSerializer, isBeyondLastTerm, nextTerm, readTermState

Methods inherited from class org.apache.lucene.codecs.uniformsplit.BlockReader

clearTermState, compareToMiddleAndJump, createBlockHeaderSerializer, createDeltaBaseTermStateSerializer, decodeBlockBytesIfNeeded, docFreq, getOrCreateDictionaryBrowser, impacts, initializeBlockReadLazily, initializeHeader, isCurrentTerm, newCorruptIndexException, ord, postings, ramBytesUsed, readHeader, readLineInBlock, seekInBlock, seekInBlock, term, termState, totalTermFreq

Methods inherited from class org.apache.lucene.index.BaseTermsEnum

attributes

Methods inherited from class org.apache.lucene.index.TermsEnum

postings

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.util.Accountable

getChildResources

Constructor Detail

STMergingBlockReader

public STMergingBlockReader(IndexDictionary.BrowserSupplier dictionaryBrowserSupplier,
                            IndexInput blockInput,
                            PostingsReaderBase postingsReader,
                            FieldMetadata fieldMetadata,
                            BlockDecoder blockDecoder,
                            FieldInfos fieldInfos)
                     throws IOException

Throws:

IOException

Method Detail

seekCeil

public TermsEnum.SeekStatus seekCeil(BytesRef searchedTerm)

Overrides:

seekCeil in class STBlockReader

seekExact

public boolean seekExact(BytesRef searchedTerm)

Overrides:

seekExact in class STBlockReader

seekExact

public void seekExact(BytesRef term,
                      TermState state)

Description copied from class: BlockReader

Positions this BlockReader without re-seeking the term dictionary.

The block containing the term is not read by this method. It will be read lazily only if needed, for example if BlockReader.next() is called. Calling BlockReader.postings(org.apache.lucene.index.PostingsEnum, int) after this method does require the block to be read.

Overrides:

seekExact in class BlockReader

seekExact

public void seekExact(long ord)

Description copied from class: BlockReader

Not supported.

Overrides:

seekExact in class BlockReader

readTermStateIfNotRead

protected BlockTermState readTermStateIfNotRead()

Description copied from class: BlockReader

Reads the BlockTermState if it is not already set. Sets BlockReader.termState.

Overrides:

readTermStateIfNotRead in class BlockReader

next

public BytesRef next()
              throws IOException

Specified by:

next in interface BytesRefIterator

Overrides:

next in class STBlockReader

Throws:

IOException

postings

public PostingsEnum postings(String fieldName,
                             BlockTermState termState,
                             PostingsEnum reuse,
                             int flags)
                      throws IOException

Creates a new PostingsEnum for the provided field and BlockTermState.

Parameters:

reuse - Previous PostingsEnum to reuse; or null to create a new one.

flags - Postings flags.

Throws:

IOException

readFieldTermStatesMap

public void readFieldTermStatesMap(Map<String,BlockTermState> fieldTermStatesMap)
                            throws IOException

Reads all the fields TermStates of the current term and put them in the provided map. Clears the map first, before putting TermStates.

Throws:

IOException