Constructor and Description |
---|
field)
Create a query that will match documents which have a value for the given
field . |
Modifier and Type | Method and Description |
---|---|
Weight |
createWeight(IndexSearcher searcher,
ScoreMode scoreMode,
float boost)
Expert: Constructs an appropriate Weight implementation for this query.
|
boolean |
other)
Override and implement query instance equivalence properly in a subclass.
|
static DocIdSetIterator |
field,
LeafReader reader)
Returns a
DocIdSetIterator from the given field or null if the field doesn't exist
in the reader or if the reader has no doc values for the field. |
|
getField() |
int |
hashCode()
Override and implement query hash code properly in a subclass.
|
|
field)
Prints a query to a string, with
field assumed to be the
default field and omitted. |
void |
visit(QueryVisitor visitor)
Recurse through the query tree, visiting any child queries
|
classHash, rewrite, sameClassAs, toString
public DocValuesFieldExistsQuery( field)
field
.public getField()
public boolean equals( other)
Query
QueryCache
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.equals
in class Query
Query.sameClassAs(Object)
,
Query.classHash()
public int hashCode()
Query
QueryCache
works properly.hashCode
in class Query
Query.equals(Object)
public toString( field)
Query
field
assumed to be the
default field and omitted.public void visit(QueryVisitor visitor)
Query
public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost)
Query
Only implemented by primitive queries, which re-write to themselves.
createWeight
in class Query
scoreMode
- How the produced scorers will be consumed.boost
- The boost that is propagated by the parent queries.public static field, LeafReader reader) throws
DocIdSetIterator
from the given field or null if the field doesn't exist
in the reader or if the reader has no doc values for the field.
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