abstract class DisjunctionScorer extends Scorer
Modifier and Type | Class and Description |
---|---|
private class |
DisjunctionScorer.TwoPhase |
Scorer.ChildScorer
Modifier and Type | Field and Description |
---|---|
private DisjunctionDISIApproximation |
approximation |
private boolean |
needsScores |
private DisiPriorityQueue |
subScorers |
private DisjunctionScorer.TwoPhase |
twoPhase |
Modifier | Constructor and Description |
---|---|
protected |
DisjunctionScorer(Weight weight,
java.util.List<Scorer> subScorers,
boolean needsScores) |
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. |
(package private) DisiWrapper |
getSubMatches() |
DocIdSetIterator |
iterator()
Return a
DocIdSetIterator over matching documents. |
float |
score()
Returns the score of the current document matching the query.
|
protected abstract float |
score(DisiWrapper topList)
Compute the score for the given linked list of scorers.
|
TwoPhaseIterator |
twoPhaseIterator()
Optional method: Return a
TwoPhaseIterator view of this
Scorer . |
private final boolean needsScores
private final DisiPriorityQueue subScorers
private final DisjunctionDISIApproximation approximation
private final DisjunctionScorer.TwoPhase twoPhase
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 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
public final 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()
DisiWrapper getSubMatches() throws java.io.IOException
java.io.IOException
public final int freq() throws java.io.IOException
Scorer
public final 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)
.protected abstract float score(DisiWrapper topList) throws java.io.IOException
java.io.IOException
public final java.util.Collection<Scorer.ChildScorer> getChildren() throws java.io.IOException
Scorer
LeafCollector.setScorer(Scorer)
,
as these may be synthetic Scorers produced by BulkScorer
which will throw an Exception.getChildren
in class Scorer
java.io.IOException