public abstract class FilterWeight extends Weight
FilterWeight
contains another Weight
and implements
all abstract methods by calling the contained weight's method.
Note that FilterWeight
does not override the non-abstract
Weight.bulkScorer(LeafReaderContext)
method and subclasses of
FilterWeight
must provide their bulkScorer implementation
if required.Weight.DefaultBulkScorer
Modifier and Type | Field and Description |
---|---|
protected Weight |
in |
parentQuery
Modifier | Constructor and Description |
---|---|
protected |
FilterWeight(Query query,
Weight weight)
Alternative constructor.
|
protected |
FilterWeight(Weight weight)
Default constructor.
|
Modifier and Type | Method and Description |
---|---|
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 boost)
Assigns the query normalization factor and boost to this.
|
Scorer |
scorer(LeafReaderContext context)
Returns a
Scorer which can iterate in order over all matching
documents and assign them a score. |
bulkScorer, getQuery
protected final Weight in
protected FilterWeight(Weight weight)
protected FilterWeight(Query query, Weight weight)
weight
was not obtained
via the Query.createWeight(IndexSearcher, boolean)
method of the query
object.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 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 float getValueForNormalization() throws IOException
Weight
getValueForNormalization
in class Weight
IOException
public void normalize(float norm, float boost)
Weight
public Scorer scorer(LeafReaderContext context) throws IOException
Weight
Scorer
which can iterate in order over all matching
documents and assign them a score.
NOTE: null can be returned if no documents will be scored by this query.
NOTE: The returned Scorer
does not have
LeafReader.getLiveDocs()
applied, they need to be checked on top.
scorer
in class Weight
context
- the LeafReaderContext
for which to return the Scorer
.Scorer
which scores documents in/out-of order.IOException
- if there is a low-level I/O errorCopyright © 2000-2016 Apache Software Foundation. All Rights Reserved.