Package org.apache.lucene.search
Class Weight.DefaultBulkScorer
java.lang.Object
org.apache.lucene.search.BulkScorer
org.apache.lucene.search.Weight.DefaultBulkScorer
- Enclosing class:
Weight
Just wraps a Scorer and performs top scoring using it.
- NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionlongcost()Same asDocIdSetIterator.cost()for bulk scorers.intscore(LeafCollector collector, Bits acceptDocs, int min, int max) Collects matching documents in a range and return an estimation of the next matching document which is on or aftermax.
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Constructor Details
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DefaultBulkScorer
Sole constructor.
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Method Details
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cost
public long cost()Description copied from class:BulkScorerSame asDocIdSetIterator.cost()for bulk scorers.- Specified by:
costin classBulkScorer
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score
Description copied from class:BulkScorerCollects matching documents in a range and return an estimation of the next matching document which is on or aftermax.The return value must be:
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max, DocIdSetIterator.NO_MORE_DOCSif there are no more matches,- <= the first matching document that is >=
maxotherwise.
minis the minimum document to be considered for matching. All documents strictly before this value must be ignored.Although
maxwould be a legal return value for this method, higher values might help callers skip more efficiently over non-matching portions of the docID space.For instance, a
Scorer-based implementation could look like below:private final Scorer scorer; // set via constructor public int score(LeafCollector collector, Bits acceptDocs, int min, int max) throws IOException { collector.setScorer(scorer); int doc = scorer.docID(); if (doc < min) { doc = scorer.advance(min); } while (doc < max) { if (acceptDocs == null || acceptDocs.get(doc)) { collector.collect(doc); } doc = scorer.nextDoc(); } return doc; }- Specified by:
scorein classBulkScorer- Parameters:
collector- The collector to which all matching documents are passed.acceptDocs-Bitsthat represents the allowed documents to match, ornullif they are all allowed to match.min- Score starting at, including, this documentmax- Score up to, but not including, this doc- Returns:
- an under-estimation of the next matching doc after max
- Throws:
IOException
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