Package org.apache.lucene.search
Class MultiTermQueryConstantScoreWrapper<Q extends MultiTermQuery>
- java.lang.Object
-
- org.apache.lucene.search.Query
-
- org.apache.lucene.search.MultiTermQueryConstantScoreWrapper<Q>
-
- All Implemented Interfaces:
Accountable
final class MultiTermQueryConstantScoreWrapper<Q extends MultiTermQuery> extends Query implements Accountable
This class also provides the functionality behindMultiTermQuery.CONSTANT_SCORE_REWRITE
. It tries to rewrite per-segment as a boolean query that returns a constant score and otherwise fills a bit set with matches and builds a Scorer on top of this bit set.
-
-
Nested Class Summary
Nested Classes Modifier and Type Class Description private static class
MultiTermQueryConstantScoreWrapper.TermAndState
private static class
MultiTermQueryConstantScoreWrapper.WeightOrDocIdSet
-
Field Summary
Fields Modifier and Type Field Description private static int
BOOLEAN_REWRITE_TERM_COUNT_THRESHOLD
protected Q
query
-
Fields inherited from interface org.apache.lucene.util.Accountable
NULL_ACCOUNTABLE
-
-
Constructor Summary
Constructors Modifier Constructor Description protected
MultiTermQueryConstantScoreWrapper(Q query)
Wrap aMultiTermQuery
as a Filter.
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Weight
createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost)
Expert: Constructs an appropriate Weight implementation for this query.boolean
equals(java.lang.Object other)
Override and implement query instance equivalence properly in a subclass.java.lang.String
getField()
Returns the field name for this queryQ
getQuery()
Returns the encapsulated queryint
hashCode()
Override and implement query hash code properly in a subclass.long
ramBytesUsed()
Return the memory usage of this object in bytes.java.lang.String
toString(java.lang.String field)
Prints a query to a string, withfield
assumed to be the default field and omitted.void
visit(QueryVisitor visitor)
Recurse through the query tree, visiting any child queries-
Methods inherited from class org.apache.lucene.search.Query
classHash, rewrite, sameClassAs, toString
-
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
-
Methods inherited from interface org.apache.lucene.util.Accountable
getChildResources
-
-
-
-
Field Detail
-
BOOLEAN_REWRITE_TERM_COUNT_THRESHOLD
private static final int BOOLEAN_REWRITE_TERM_COUNT_THRESHOLD
- See Also:
- Constant Field Values
-
query
protected final Q extends MultiTermQuery query
-
-
Constructor Detail
-
MultiTermQueryConstantScoreWrapper
protected MultiTermQueryConstantScoreWrapper(Q query)
Wrap aMultiTermQuery
as a Filter.
-
-
Method Detail
-
ramBytesUsed
public long ramBytesUsed()
Description copied from interface:Accountable
Return the memory usage of this object in bytes. Negative values are illegal.- Specified by:
ramBytesUsed
in interfaceAccountable
-
toString
public java.lang.String toString(java.lang.String field)
Description copied from class:Query
Prints a query to a string, withfield
assumed to be the default field and omitted.
-
equals
public final boolean equals(java.lang.Object other)
Description copied from class:Query
Override and implement query instance equivalence properly in a subclass. This is required so thatQueryCache
works properly.Typically a query will be equal to another only if it's an instance of the same class and its document-filtering properties are identical that other instance. Utility methods are provided for certain repetitive code.
- Specified by:
equals
in classQuery
- See Also:
Query.sameClassAs(Object)
,Query.classHash()
-
hashCode
public final int hashCode()
Description copied from class:Query
Override and implement query hash code properly in a subclass. This is required so thatQueryCache
works properly.- Specified by:
hashCode
in classQuery
- See Also:
Query.equals(Object)
-
getQuery
public Q getQuery()
Returns the encapsulated query
-
getField
public final java.lang.String getField()
Returns the field name for this query
-
createWeight
public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws java.io.IOException
Description copied from class:Query
Expert: Constructs an appropriate Weight implementation for this query.Only implemented by primitive queries, which re-write to themselves.
- Overrides:
createWeight
in classQuery
scoreMode
- How the produced scorers will be consumed.boost
- The boost that is propagated by the parent queries.- Throws:
java.io.IOException
-
visit
public void visit(QueryVisitor visitor)
Description copied from class:Query
Recurse through the query tree, visiting any child queries
-
-