protected class ConstantScoreQuery.ConstantScorer extends Scorer
NO_MORE_DOCS
Constructor and Description |
---|
ConstantScorer(Similarity similarity,
IndexReader reader,
Weight w) |
Modifier and Type | Method and Description |
---|---|
int |
advance(int target)
Advances to the first beyond the current whose document number is greater
than or equal to target.
|
int |
doc()
Deprecated.
use
docID() instead. |
int |
docID()
Returns the following:
-1 or
DocIdSetIterator.NO_MORE_DOCS if DocIdSetIterator.nextDoc() or
DocIdSetIterator.advance(int) were not called yet. |
Explanation |
explain(int doc)
Returns an explanation of the score for a document.
|
boolean |
next()
Deprecated.
use
nextDoc() instead. |
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: in 3.0 this method will become abstract, following the removal of DocIdSetIterator.next() . |
float |
score()
Returns the score of the current document matching the query.
|
boolean |
skipTo(int target)
Deprecated.
use
advance(int) instead. |
public ConstantScorer(Similarity similarity, IndexReader reader, Weight w) throws java.io.IOException
java.io.IOException
public boolean next() throws java.io.IOException
nextDoc()
instead.DocIdSetIterator
DocIdSetIterator.nextDoc()
instead. This method throws
UnsupportedOperationException
if called.next
in class DocIdSetIterator
java.io.IOException
public int nextDoc() throws java.io.IOException
DocIdSetIterator
DocIdSetIterator.NO_MORE_DOCS
if there are no more docs in the
set.DocIdSetIterator.next()
. For backward compatibility it is implemented as:
public int nextDoc() throws IOException { return next() ? doc() : NO_MORE_DOCS; }NOTE: after the iterator has exhausted you should not call this method, as it may result in unpredicted behavior.
nextDoc
in class DocIdSetIterator
java.io.IOException
public int doc()
docID()
instead.DocIdSetIterator
DocIdSetIterator.docID()
instead. This method throws
UnsupportedOperationException
if called.doc
in class DocIdSetIterator
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.
NOTE: in 3.0, this method will become abstract.
docID
in class DocIdSetIterator
public float score() throws java.io.IOException
Scorer
DocIdSetIterator.next()
or DocIdSetIterator.skipTo(int)
is called the first time, or when called from within
Collector.collect(int)
.public boolean skipTo(int target) throws java.io.IOException
advance(int)
instead.DocIdSetIterator
DocIdSetIterator.advance(int)
instead. This method throws
UnsupportedOperationException
if called.skipTo
in class DocIdSetIterator
java.io.IOException
public int advance(int target) throws java.io.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.
NOTE: in 3.0 this method will become abstract, following the removal
of DocIdSetIterator.skipTo(int)
.
advance
in class DocIdSetIterator
java.io.IOException
public Explanation explain(int doc) throws java.io.IOException
Scorer
DocIdSetIterator.next()
, DocIdSetIterator.skipTo(int)
and
Scorer.score(HitCollector)
methods should not be used.Copyright © 2000-2019 Apache Software Foundation. All Rights Reserved.