Serializable
, Cloneable
FieldScoreQuery
public class ValueSourceQuery extends Query
ValueSource
.
This query provides a score for each and every undeleted document in the index.
The value source can be based on a (cached) value of an indexed field, but it can also be based on an external source, e.g. values read from an external database.
Score is set as: Score(doc,query) = query.getBoost()2 * valueSource(doc).
Constructor | Description |
---|---|
ValueSourceQuery(ValueSource valSrc) |
Create a value source query
|
Modifier and Type | Method | Description |
---|---|---|
Weight |
createWeight(Searcher searcher) |
Expert: Constructs an appropriate Weight implementation for this query.
|
boolean |
equals(Object o) |
Returns true if
o is equal to this. |
void |
extractTerms(Set<Term> terms) |
Expert: adds all terms occurring in this query to the terms set.
|
int |
hashCode() |
Returns a hash code value for this object.
|
Query |
rewrite(IndexReader reader) |
Expert: called to re-write queries into primitive queries.
|
String |
toString(String field) |
Prints a query to a string, with
field assumed to be the
default field and omitted. |
finalize, getClass, notify, notifyAll, wait, wait, wait
clone, combine, getBoost, getSimilarity, mergeBooleanQueries, setBoost, toString, weight
public ValueSourceQuery(ValueSource valSrc)
valSrc
- provides the values defines the function to be used for scoringpublic Query rewrite(IndexReader reader) throws IOException
Query
rewrite
in class Query
IOException
public void extractTerms(Set<Term> terms)
Query
rewritten
form.extractTerms
in class Query
public Weight createWeight(Searcher searcher)
Query
Only implemented by primitive queries, which re-write to themselves.
createWeight
in class Query
public String toString(String field)
Query
field
assumed to be the
default field and omitted.
The representation used is one that is supposed to be readable
by QueryParser
. However,
there are the following limitations:
public boolean equals(Object o)
o
is equal to this.Copyright © 2000-2018 Apache Software Foundation. All Rights Reserved.