org.apache.lucene.codecs.uniformsplit.sharedterms

Class STIntersectBlockReader

java.lang.Object

org.apache.lucene.index.TermsEnum

org.apache.lucene.index.BaseTermsEnum

org.apache.lucene.codecs.uniformsplit.BlockReader

org.apache.lucene.codecs.uniformsplit.IntersectBlockReader

org.apache.lucene.codecs.uniformsplit.sharedterms.STIntersectBlockReader

All Implemented Interfaces:

Accountable, BytesRefIterator

public class STIntersectBlockReader
extends IntersectBlockReader

The "intersect" TermsEnum response to STUniformSplitTerms.intersect(CompiledAutomaton, BytesRef), intersecting the terms with an automaton.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.codecs.uniformsplit.IntersectBlockReader

IntersectBlockReader.AutomatonNextTermCalculator

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

TermsEnum.SeekStatus

Field Summary

Fields

Modifier and Type	Field and Description
protected FieldInfos	fieldInfos

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

beyondCommonPrefix, blockPrefixLen, blockPrefixRunAutomatonState, commonPrefixRef, commonSuffixRef, nextStringCalculator, numBytesAccepted, runAutomaton, seekTerm, startTerm

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

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

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

EMPTY

Constructor Summary

Constructors

Constructor and Description
STIntersectBlockReader(CompiledAutomaton compiled, BytesRef startTerm, DictionaryBrowserSupplier dictionaryBrowserSupplier, IndexInput blockInput, PostingsReaderBase postingsReader, FieldMetadata fieldMetadata, BlockDecoder blockDecoder, FieldInfos fieldInfos)

Method Summary

Modifier and Type	Method and Description
BytesRef	next() Increments the iteration to the next BytesRef in the iterator.
protected boolean	nextBlockMatchingPrefix() Find the next block that appears to contain terms that could match the automata.
protected BlockTermState	readTermState() Reads the BlockTermState on the current line for the specific field corresponding this this reader.
private boolean	termOccursInField()

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

isBeyondCommonPrefix, nextTermInBlockMatching, runAutomatonForState, runAutomatonFromPrefix, seekCeil, seekExact, seekExact, seekExact

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

clearTermState, compareToMiddleAndJump, decodeBlockBytesIfNeeded, docFreq, getOrCreateDictionaryBrowser, impacts, initializeBlockReadLazily, initializeHeader, isBeyondLastTerm, isCurrentTerm, nextTerm, ord, postings, ramBytesUsed, readHeader, readLineInBlock, readTermStateIfNotRead, 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

Field Detail

fieldInfos

protected final FieldInfos fieldInfos

Constructor Detail

STIntersectBlockReader

public STIntersectBlockReader(CompiledAutomaton compiled,
                              BytesRef startTerm,
                              DictionaryBrowserSupplier dictionaryBrowserSupplier,
                              IndexInput blockInput,
                              PostingsReaderBase postingsReader,
                              FieldMetadata fieldMetadata,
                              BlockDecoder blockDecoder,
                              FieldInfos fieldInfos)
                       throws java.io.IOException

Throws:

java.io.IOException

Method Detail

next

public BytesRef next()
              throws java.io.IOException

Description copied from interface: BytesRefIterator

Increments the iteration to the next BytesRef in the iterator. Returns the resulting BytesRef or null if the end of the iterator is reached. The returned BytesRef may be re-used across calls to next. After this method returns null, do not call it again: the results are undefined.

Specified by:

next in interface BytesRefIterator

Overrides:

next in class IntersectBlockReader

Returns:

the next BytesRef in the iterator or null if the end of the iterator is reached.

Throws:

java.io.IOException - If there is a low-level I/O error.

termOccursInField

private boolean termOccursInField()
                           throws java.io.IOException

Throws:

java.io.IOException

nextBlockMatchingPrefix

protected boolean nextBlockMatchingPrefix()
                                   throws java.io.IOException

Description copied from class: IntersectBlockReader

Find the next block that appears to contain terms that could match the automata. The prefix is the primary clue. Returns true if at one, or false for no more (EOF).

Overrides:

nextBlockMatchingPrefix in class IntersectBlockReader

Throws:

java.io.IOException

readTermState

protected BlockTermState readTermState()
                                throws java.io.IOException

Reads the BlockTermState on the current line for the specific field corresponding this this reader. Changes the current BlockTermState to null if the term does not occur for the field.

Overrides:

readTermState in class BlockReader

Returns:

The BlockTermState; or null if none.

Throws:

java.io.IOException