public class BooleanWeight extends Weight
Weight.DefaultBulkScorer
Modifier and Type | Field and Description |
---|---|
protected int |
maxCoord |
protected BooleanQuery |
query |
protected Similarity |
similarity
The Similarity implementation.
|
protected ArrayList<Weight> |
weights |
parentQuery
Constructor and Description |
---|
BooleanWeight(BooleanQuery query,
IndexSearcher searcher,
boolean needsScores,
boolean disableCoord) |
Modifier and Type | Method and Description |
---|---|
BulkScorer |
bulkScorer(LeafReaderContext context,
Bits acceptDocs)
Optional method, to return a
BulkScorer to
score the query and send hits to a Collector . |
float |
coord(int overlap,
int maxOverlap) |
Explanation |
explain(LeafReaderContext context,
int doc)
An explanation of the score computation for the named document.
|
void |
extractTerms(Set<Term> terms)
Expert: adds all terms occurring in this query to the terms set.
|
float |
getValueForNormalization()
The value for normalization of contained query clauses (e.g.
|
void |
normalize(float norm,
float topLevelBoost)
Assigns the query normalization factor and boost from parent queries to this.
|
Scorer |
scorer(LeafReaderContext context,
Bits acceptDocs)
Returns a
Scorer which scores documents in/out-of order according
to scoreDocsInOrder . |
protected Similarity similarity
protected final BooleanQuery query
protected int maxCoord
public BooleanWeight(BooleanQuery query, IndexSearcher searcher, boolean needsScores, boolean disableCoord) throws IOException
IOException
public void extractTerms(Set<Term> terms)
Weight
Weight
was created with needsScores == true
then this
method will only extract terms which are used for scoring, otherwise it
will extract all terms which are used for matching.extractTerms
in class Weight
public float getValueForNormalization() throws IOException
Weight
getValueForNormalization
in class Weight
IOException
public float coord(int overlap, int maxOverlap)
public void normalize(float norm, float topLevelBoost)
Weight
public Explanation explain(LeafReaderContext context, int doc) throws IOException
Weight
explain
in class Weight
context
- the readers context to create the Explanation
for.doc
- the document's id relative to the given context's readerIOException
- if an IOException
occurspublic BulkScorer bulkScorer(LeafReaderContext context, Bits acceptDocs) throws IOException
Weight
BulkScorer
to
score the query and send hits to a Collector
.
Only queries that have a different top-level approach
need to override this; the default implementation
pulls a normal Scorer
and iterates and
collects the resulting hits.bulkScorer
in class Weight
context
- the LeafReaderContext
for which to return the Scorer
.acceptDocs
- Bits that represent the allowable docs to match (typically deleted docs
but possibly filtering other documents)BulkScorer
which scores documents and
passes them to a collector.IOException
- if there is a low-level I/O errorpublic Scorer scorer(LeafReaderContext context, Bits acceptDocs) throws IOException
Weight
Scorer
which scores documents in/out-of order according
to scoreDocsInOrder
.
NOTE: null can be returned if no documents will be scored by this query.
scorer
in class Weight
context
- the LeafReaderContext
for which to return the Scorer
.acceptDocs
- Bits that represent the allowable docs to match (typically deleted docs
but possibly filtering other documents)Scorer
which scores documents in/out-of order.IOException
- if there is a low-level I/O errorCopyright © 2000-2015 Apache Software Foundation. All Rights Reserved.