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java.lang.Object org.apache.lucene.search.DocIdSetIterator org.apache.lucene.search.Scorer org.apache.lucene.search.ConstantScoreQuery.ConstantScorer
protected class ConstantScoreQuery.ConstantScorer
Field Summary |
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Fields inherited from class org.apache.lucene.search.DocIdSetIterator |
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NO_MORE_DOCS |
Constructor Summary | |
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ConstantScoreQuery.ConstantScorer(Similarity similarity,
IndexReader reader,
Weight w)
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Method Summary | |
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int |
advance(int target)
Advances to the first beyond the current whose document number is greater than or equal to target. |
int |
docID()
Returns the following: -1 or DocIdSetIterator.NO_MORE_DOCS if DocIdSetIterator.nextDoc() or
DocIdSetIterator.advance(int) were not called yet. |
int |
nextDoc()
Advances to the next document in the set and returns the doc it is currently on, or DocIdSetIterator.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. |
float |
score()
Returns the score of the current document matching the query. |
Methods inherited from class org.apache.lucene.search.Scorer |
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getSimilarity, score, score |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ConstantScoreQuery.ConstantScorer(Similarity similarity, IndexReader reader, Weight w) throws IOException
IOException
Method Detail |
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public int nextDoc() throws IOException
DocIdSetIterator
DocIdSetIterator.NO_MORE_DOCS
if there are no more docs in the
set.
nextDoc
in class DocIdSetIterator
IOException
public int docID()
DocIdSetIterator
DocIdSetIterator.NO_MORE_DOCS
if DocIdSetIterator.nextDoc()
or
DocIdSetIterator.advance(int)
were not called yet.
DocIdSetIterator.NO_MORE_DOCS
if the iterator has exhausted.
docID
in class DocIdSetIterator
public float score() throws IOException
Scorer
DocIdSetIterator.nextDoc()
or DocIdSetIterator.advance(int)
is called the first time, or when called from within
Collector.collect(int)
.
score
in class Scorer
IOException
public int advance(int target) throws IOException
DocIdSetIterator
DocIdSetIterator.NO_MORE_DOCS
if there are no more docs in the set.
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: certain implementations may return a different value (each time) if called several times in a row with the same target.
NOTE: this method may be called with 2147483647 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.
NOTE: after the iterator has exhausted you should not call this method, as it may result in unpredicted behavior.
advance
in class DocIdSetIterator
IOException
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