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java.lang.Objectorg.apache.lucene.search.DocIdSetIterator
org.apache.lucene.search.Scorer
org.apache.lucene.search.spans.SpanScorer
public class SpanScorer
Public for extension only.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.apache.lucene.search.Scorer |
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Scorer.ChildScorer |
Field Summary | |
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protected int |
doc
|
protected Similarity.SloppySimScorer |
docScorer
|
protected float |
freq
|
protected boolean |
more
|
protected Spans |
spans
|
Fields inherited from class org.apache.lucene.search.Scorer |
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weight |
Fields inherited from class org.apache.lucene.search.DocIdSetIterator |
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NO_MORE_DOCS |
Constructor Summary | |
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protected |
SpanScorer(Spans spans,
Weight weight,
Similarity.SloppySimScorer docScorer)
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Method Summary | |
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int |
advance(int target)
Advances to the first beyond (see NOTE below) 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. |
float |
freq()
Returns number of matches for the current document. |
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. |
protected boolean |
setFreqCurrentDoc()
|
Methods inherited from class org.apache.lucene.search.Scorer |
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getChildren, getWeight, score, score |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected Spans spans
protected boolean more
protected int doc
protected float freq
protected final Similarity.SloppySimScorer docScorer
Constructor Detail |
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protected SpanScorer(Spans spans, Weight weight, Similarity.SloppySimScorer docScorer) 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 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: when target ≤ current
implementations may opt
not to advance beyond their current DocIdSetIterator.docID()
.
NOTE: this method may be called with DocIdSetIterator.NO_MORE_DOCS
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
protected boolean setFreqCurrentDoc() throws IOException
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 float freq() throws IOException
Scorer
freq
in class Scorer
IOException
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