public class ScoreCachingWrappingScorer extends FilterScorer
Scorerwhich wraps another scorer and caches the score of the current document. Successive calls to
score()will return the same result and will not invoke the wrapped Scorer's score() method, unless the current document has changed.
Collectorinterface, in which the score is not computed for a document by default, only if the collector requests it. Some collectors may need to use the score in several places, however all they have in hand is a
Scorerobject, and might end up computing the score of a document more than once.
|Constructor and Description|
Creates a new instance by wrapping the given scorer.
|Modifier and Type||Method and Description|
Returns the score of the current document matching the query.
docID, iterator, twoPhaseIterator
public ScoreCachingWrappingScorer(Scorer scorer)
public float score() throws IOException
DocIdSetIterator.advance(int)is called on the
Scorer.iterator()the first time, or when called from within
public Collection<Scorer.ChildScorer> getChildren()
LeafCollector.setScorer(Scorer), as these may be synthetic Scorers produced by
BulkScorerwhich will throw an Exception.
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