Package org.apache.lucene.search
Class DocValuesFieldExistsQuery
- java.lang.Object
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- org.apache.lucene.search.Query
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- org.apache.lucene.search.DocValuesFieldExistsQuery
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Constructor Summary
Constructors Constructor Description DocValuesFieldExistsQuery(String field)
Create a query that will match documents which have a value for the givenfield
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Method Summary
All Methods Static 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(Object other)
Override and implement query instance equivalence properly in a subclass.static DocIdSetIterator
getDocValuesDocIdSetIterator(String field, LeafReader reader)
Returns aDocIdSetIterator
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.String
getField()
int
hashCode()
Override and implement query hash code properly in a subclass.String
toString(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
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Constructor Detail
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DocValuesFieldExistsQuery
public DocValuesFieldExistsQuery(String field)
Create a query that will match documents which have a value for the givenfield
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Method Detail
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getField
public String getField()
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equals
public boolean equals(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()
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hashCode
public 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)
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toString
public String toString(String field)
Description copied from class:Query
Prints a query to a string, withfield
assumed to be the default field and omitted.
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visit
public void visit(QueryVisitor visitor)
Description copied from class:Query
Recurse through the query tree, visiting any child queries
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createWeight
public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost)
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.
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getDocValuesDocIdSetIterator
public static DocIdSetIterator getDocValuesDocIdSetIterator(String field, LeafReader reader) throws IOException
Returns aDocIdSetIterator
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.- Throws:
IOException
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