protected class ConstantScoreQuery.ConstantScorer extends Scorer
Scorer.ChildScorerFLAG_FREQS, FLAG_NONENO_MORE_DOCS| Constructor and Description |
|---|
ConstantScoreQuery.ConstantScorer(DocIdSetIterator docIdSetIterator,
Weight w,
float theScore) |
| 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, and returns the document number itself.
|
int |
docID()
Returns the following:
-1 or
DocIdSetIterator.NO_MORE_DOCS if DocIdSetIterator.nextDoc() or
DocIdSetIterator.advance(int) were not called yet. |
int |
freq()
Returns term frequency in the current document, or 1 if the field was
indexed with
FieldInfo.IndexOptions.DOCS_ONLY. |
Collection<Scorer.ChildScorer> |
getChildren()
Returns child sub-scorers
|
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.
|
void |
score(Collector collector)
Scores and collects all matching documents.
|
boolean |
score(Collector collector,
int max,
int firstDocID)
Expert: Collects matching documents in a range.
|
attributespublic ConstantScoreQuery.ConstantScorer(DocIdSetIterator docIdSetIterator, Weight w, float theScore)
public int nextDoc()
throws IOException
DocIdSetIteratorDocIdSetIterator.NO_MORE_DOCS if there are no more docs in the
set.nextDoc in class DocIdSetIteratorIOExceptionpublic int docID()
DocIdSetIteratorDocIdSetIterator.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 DocIdSetIteratorpublic float score()
throws IOException
ScorerDocIdSetIterator.nextDoc() or DocIdSetIterator.advance(int)
is called the first time, or when called from within
Collector.collect(int).score in class ScorerIOExceptionpublic int freq()
throws IOException
DocsEnumFieldInfo.IndexOptions.DOCS_ONLY. Do not call this before
DocIdSetIterator.nextDoc() is first called, nor after DocIdSetIterator.nextDoc() returns
DocIdSetIterator.NO_MORE_DOCS.
NOTE: if the DocsEnum was obtain with DocsEnum.FLAG_NONE,
the result of this method is undefined.
freq in class DocsEnumIOExceptionpublic int advance(int target)
throws IOException
DocIdSetIteratorDocIdSetIterator.NO_MORE_DOCS if target
is greater than the highest document number in the set.
The behavior of this method is undefined when called with
target ≤ current, or after the iterator has exhausted.
Both cases may result in unpredicted behavior.
When target > current it 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: 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.
advance in class DocIdSetIteratorIOExceptionpublic void score(Collector collector) throws IOException
Scorerscore in class Scorercollector - The collector to which all matching documents are passed.IOExceptionpublic boolean score(Collector collector, int max, int firstDocID) throws IOException
ScorerfirstDocID is added to ensure that DocIdSetIterator.nextDoc()
was called before this method.score in class Scorercollector - The collector to which all matching documents are passed.max - Do not score documents past this.firstDocID - The first document ID (ensures DocIdSetIterator.nextDoc() is called before
this method.IOExceptionpublic Collection<Scorer.ChildScorer> getChildren()
ScorergetChildren in class ScorerCopyright © 2000-2013 Apache Software Foundation. All Rights Reserved.