Scorer.ChildScorer
Modifier and Type | Field and Description |
---|---|
private static int |
ADVANCE_COST
Estimation of the number of operations required to call DISI.advance.
|
private DocIdSetIterator |
exclApproximation |
private TwoPhaseIterator |
exclTwoPhaseIterator |
private DocIdSetIterator |
reqApproximation |
private Scorer |
reqScorer |
private TwoPhaseIterator |
reqTwoPhaseIterator |
Constructor and Description |
---|
ReqExclScorer(Scorer reqScorer,
Scorer exclScorer)
Construct a
ReqExclScorer . |
Modifier and Type | Method and Description |
---|---|
int |
docID()
Returns the doc ID that is currently being scored.
|
int |
freq()
Returns the freq of this Scorer on the current document
|
java.util.Collection<Scorer.ChildScorer> |
getChildren()
Returns child sub-scorers positioned on the current document
Note that this method should not be called on Scorers passed to
LeafCollector.setScorer(Scorer) ,
as these may be synthetic Scorers produced by BulkScorer which will throw an Exception. |
DocIdSetIterator |
iterator()
Return a
DocIdSetIterator over matching documents. |
private static float |
matchCost(DocIdSetIterator reqApproximation,
TwoPhaseIterator reqTwoPhaseIterator,
DocIdSetIterator exclApproximation,
TwoPhaseIterator exclTwoPhaseIterator) |
private static boolean |
matchesOrNull(TwoPhaseIterator it)
Confirms whether or not the given
TwoPhaseIterator
matches on the current document. |
float |
score()
Returns the score of the current document matching the query.
|
TwoPhaseIterator |
twoPhaseIterator()
Optional method: Return a
TwoPhaseIterator view of this
Scorer . |
private final Scorer reqScorer
private final DocIdSetIterator reqApproximation
private final DocIdSetIterator exclApproximation
private final TwoPhaseIterator reqTwoPhaseIterator
private final TwoPhaseIterator exclTwoPhaseIterator
private static final int ADVANCE_COST
private static boolean matchesOrNull(TwoPhaseIterator it) throws java.io.IOException
TwoPhaseIterator
matches on the current document.java.io.IOException
public DocIdSetIterator iterator()
Scorer
DocIdSetIterator
over matching documents.
The returned iterator will either be positioned on -1
if no
documents have been scored yet, DocIdSetIterator.NO_MORE_DOCS
if all documents have been scored already, or the last document id that
has been scored otherwise.
The returned iterator is a view: calling this method several times will
return iterators that have the same state.public int docID()
Scorer
-1
if the Scorer.iterator()
is not positioned
or DocIdSetIterator.NO_MORE_DOCS
if it has been entirely consumed.docID
in class Scorer
DocIdSetIterator.docID()
public int freq() throws java.io.IOException
Scorer
public float score() throws java.io.IOException
Scorer
DocIdSetIterator.nextDoc()
or
DocIdSetIterator.advance(int)
is called on the Scorer.iterator()
the first time, or when called from within LeafCollector.collect(int)
.public java.util.Collection<Scorer.ChildScorer> getChildren()
Scorer
LeafCollector.setScorer(Scorer)
,
as these may be synthetic Scorers produced by BulkScorer
which will throw an Exception.getChildren
in class Scorer
private static float matchCost(DocIdSetIterator reqApproximation, TwoPhaseIterator reqTwoPhaseIterator, DocIdSetIterator exclApproximation, TwoPhaseIterator exclTwoPhaseIterator)
public TwoPhaseIterator twoPhaseIterator()
Scorer
TwoPhaseIterator
view of this
Scorer
. A return value of null
indicates that
two-phase iteration is not supported.
Note that the returned TwoPhaseIterator
's
approximation
must
advance synchronously with the Scorer.iterator()
: advancing the
approximation must advance the iterator and vice-versa.
Implementing this method is typically useful on Scorer
s
that have a high per-document overhead in order to confirm matches.
The default implementation returns null
.twoPhaseIterator
in class Scorer