Module org.apache.lucene.core
Class Lucene99PostingsReader.BlockImpactsPostingsEnum
- java.lang.Object
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- org.apache.lucene.search.DocIdSetIterator
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- org.apache.lucene.index.PostingsEnum
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- org.apache.lucene.index.ImpactsEnum
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- org.apache.lucene.codecs.lucene99.Lucene99PostingsReader.BlockImpactsPostingsEnum
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- All Implemented Interfaces:
ImpactsSource
- Enclosing class:
- Lucene99PostingsReader
final class Lucene99PostingsReader.BlockImpactsPostingsEnum extends ImpactsEnum
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Field Summary
Fields Modifier and Type Field Description private long
accum
private int
doc
private long[]
docBuffer
private int
docBufferUpto
private int
docFreq
(package private) IndexInput
docIn
private long
docTermStartFP
private int
docUpto
(package private) ForDeltaUtil
forDeltaUtil
(package private) ForUtil
forUtil
private int
freq
private long[]
freqBuffer
(package private) boolean
indexHasOffsets
(package private) boolean
indexHasPayloads
private long
lastPosBlockFP
private int
nextSkipDoc
private long
payTermStartFP
(package private) PForUtil
pforUtil
private int
posBufferUpto
private long[]
posDeltaBuffer
(package private) IndexInput
posIn
private int
position
private int
posPendingCount
private long
posPendingFP
private long
posTermStartFP
private Lucene99ScoreSkipReader
skipper
private long
totalTermFreq
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Fields inherited from class org.apache.lucene.index.PostingsEnum
ALL, FREQS, NONE, OFFSETS, PAYLOADS, POSITIONS
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Fields inherited from class org.apache.lucene.search.DocIdSetIterator
NO_MORE_DOCS
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Constructor Summary
Constructors Constructor Description BlockImpactsPostingsEnum(FieldInfo fieldInfo, Lucene99PostingsFormat.IntBlockTermState termState)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
advance(int target)
Advances to the first beyond the current whose document number is greater than or equal to target, and returns the document number itself.void
advanceShallow(int target)
Shallow-advance totarget
.long
cost()
Returns the estimated cost of thisDocIdSetIterator
.int
docID()
Returns the following:-1
ifDocIdSetIterator.nextDoc()
orDocIdSetIterator.advance(int)
were not called yet.int
endOffset()
Returns end offset for the current position, or -1 if offsets were not indexed.int
freq()
Returns term frequency in the current document, or 1 if the field was indexed withIndexOptions.DOCS
.Impacts
getImpacts()
Get information about upcoming impacts for doc ids that are greater than or equal to the maximum ofDocIdSetIterator.docID()
and the last target that was passed toImpactsSource.advanceShallow(int)
.BytesRef
getPayload()
Returns the payload at this position, or null if no payload was indexed.int
nextDoc()
Advances to the next document in the set and returns the doc it is currently on, orDocIdSetIterator.NO_MORE_DOCS
if there are no more docs in the set.
NOTE: after the iterator has exhausted you should not call this method, as it may result in unpredicted behavior.int
nextPosition()
Returns the next position, or -1 if positions were not indexed.private void
refillDocs()
private void
refillPositions()
private void
skipPositions()
int
startOffset()
Returns start offset for the current position, or -1 if offsets were not indexed.-
Methods inherited from class org.apache.lucene.index.PostingsEnum
featureRequested
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Methods inherited from class org.apache.lucene.search.DocIdSetIterator
all, empty, range, slowAdvance
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Field Detail
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forUtil
final ForUtil forUtil
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forDeltaUtil
final ForDeltaUtil forDeltaUtil
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pforUtil
final PForUtil pforUtil
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docBuffer
private final long[] docBuffer
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freqBuffer
private final long[] freqBuffer
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posDeltaBuffer
private final long[] posDeltaBuffer
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docBufferUpto
private int docBufferUpto
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posBufferUpto
private int posBufferUpto
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skipper
private final Lucene99ScoreSkipReader skipper
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docIn
final IndexInput docIn
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posIn
final IndexInput posIn
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indexHasOffsets
final boolean indexHasOffsets
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indexHasPayloads
final boolean indexHasPayloads
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docFreq
private int docFreq
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totalTermFreq
private long totalTermFreq
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docUpto
private int docUpto
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doc
private int doc
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accum
private long accum
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freq
private int freq
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position
private int position
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posPendingCount
private int posPendingCount
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posPendingFP
private long posPendingFP
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docTermStartFP
private long docTermStartFP
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posTermStartFP
private long posTermStartFP
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payTermStartFP
private long payTermStartFP
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lastPosBlockFP
private long lastPosBlockFP
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nextSkipDoc
private int nextSkipDoc
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Constructor Detail
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BlockImpactsPostingsEnum
public BlockImpactsPostingsEnum(FieldInfo fieldInfo, Lucene99PostingsFormat.IntBlockTermState termState) throws java.io.IOException
- Throws:
java.io.IOException
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Method Detail
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freq
public int freq() throws java.io.IOException
Description copied from class:PostingsEnum
Returns term frequency in the current document, or 1 if the field was indexed withIndexOptions.DOCS
. Do not call this beforeDocIdSetIterator.nextDoc()
is first called, nor afterDocIdSetIterator.nextDoc()
returnsDocIdSetIterator.NO_MORE_DOCS
.NOTE: if the
PostingsEnum
was obtain withPostingsEnum.NONE
, the result of this method is undefined.- Specified by:
freq
in classPostingsEnum
- Throws:
java.io.IOException
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docID
public int docID()
Description copied from class:DocIdSetIterator
Returns the following:-1
ifDocIdSetIterator.nextDoc()
orDocIdSetIterator.advance(int)
were not called yet.DocIdSetIterator.NO_MORE_DOCS
if the iterator has exhausted.- Otherwise it should return the doc ID it is currently on.
- Specified by:
docID
in classDocIdSetIterator
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refillDocs
private void refillDocs() throws java.io.IOException
- Throws:
java.io.IOException
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refillPositions
private void refillPositions() throws java.io.IOException
- Throws:
java.io.IOException
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advanceShallow
public void advanceShallow(int target) throws java.io.IOException
Description copied from interface:ImpactsSource
Shallow-advance totarget
. This is cheaper than callingDocIdSetIterator.advance(int)
and allows further calls toImpactsSource.getImpacts()
to ignore doc IDs that are less thantarget
in order to get more precise information about impacts. This method may not be called on targets that are less than the currentDocIdSetIterator.docID()
. After this method has been called,DocIdSetIterator.nextDoc()
may not be called if the current doc ID is less thantarget - 1
andDocIdSetIterator.advance(int)
may not be called on targets that are less thantarget
.- Throws:
java.io.IOException
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getImpacts
public Impacts getImpacts() throws java.io.IOException
Description copied from interface:ImpactsSource
Get information about upcoming impacts for doc ids that are greater than or equal to the maximum ofDocIdSetIterator.docID()
and the last target that was passed toImpactsSource.advanceShallow(int)
. This method may not be called on an unpositioned iterator on whichImpactsSource.advanceShallow(int)
has never been called. NOTE: advancing this iterator may invalidate the returned impacts, so they should not be used after the iterator has been advanced.- Throws:
java.io.IOException
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nextDoc
public int nextDoc() throws java.io.IOException
Description copied from class:DocIdSetIterator
Advances to the next document in the set and returns the doc it is currently on, orDocIdSetIterator.NO_MORE_DOCS
if there are no more docs in the set.
NOTE: after the iterator has exhausted you should not call this method, as it may result in unpredicted behavior.- Specified by:
nextDoc
in classDocIdSetIterator
- Throws:
java.io.IOException
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advance
public int advance(int target) throws java.io.IOException
Description copied from class:DocIdSetIterator
Advances to the first beyond the current whose document number is greater than or equal to target, and returns the document number itself. Exhausts the iterator and returnsDocIdSetIterator.NO_MORE_DOCS
if target is greater than the highest document number in the set.The behavior of this method is undefined when called with
target ≤ current
, or after the iterator has exhausted. Both cases may result in unpredicted behavior.When
target > current
it behaves as if written:int advance(int target) { int doc; while ((doc = nextDoc()) < target) { } return doc; }
Some implementations are considerably more efficient than that.NOTE: this method may be called with
DocIdSetIterator.NO_MORE_DOCS
for efficiency by some Scorers. If your implementation cannot efficiently determine that it should exhaust, it is recommended that you check for that value in each call to this method.- Specified by:
advance
in classDocIdSetIterator
- Throws:
java.io.IOException
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skipPositions
private void skipPositions() throws java.io.IOException
- Throws:
java.io.IOException
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nextPosition
public int nextPosition() throws java.io.IOException
Description copied from class:PostingsEnum
Returns the next position, or -1 if positions were not indexed. Calling this more thanPostingsEnum.freq()
times is undefined.- Specified by:
nextPosition
in classPostingsEnum
- Throws:
java.io.IOException
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startOffset
public int startOffset()
Description copied from class:PostingsEnum
Returns start offset for the current position, or -1 if offsets were not indexed.- Specified by:
startOffset
in classPostingsEnum
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endOffset
public int endOffset()
Description copied from class:PostingsEnum
Returns end offset for the current position, or -1 if offsets were not indexed.- Specified by:
endOffset
in classPostingsEnum
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getPayload
public BytesRef getPayload()
Description copied from class:PostingsEnum
Returns the payload at this position, or null if no payload was indexed. You should not modify anything (neither members of the returned BytesRef nor bytes in the byte[]).- Specified by:
getPayload
in classPostingsEnum
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cost
public long cost()
Description copied from class:DocIdSetIterator
Returns the estimated cost of thisDocIdSetIterator
.This is generally an upper bound of the number of documents this iterator might match, but may be a rough heuristic, hardcoded value, or otherwise completely inaccurate.
- Specified by:
cost
in classDocIdSetIterator
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