Class ParentChildrenBlockJoinQuery
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate final Query
private final int
private final BitSetProducer
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Constructor Summary
ConstructorsConstructorDescriptionParentChildrenBlockJoinQuery
(BitSetProducer parentFilter, Query childQuery, int parentDocId) Creates aParentChildrenBlockJoinQuery
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Method Summary
Modifier and TypeMethodDescriptioncreateWeight
(IndexSearcher searcher, ScoreMode scoreMode, float boost) Expert: Constructs an appropriate Weight implementation for this query.boolean
Override and implement query instance equivalence properly in a subclass.int
hashCode()
Override and implement query hash code properly in a subclass.rewrite
(IndexSearcher indexSearcher) Expert: called to re-write queries into primitive queries.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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Field Details
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parentFilter
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childQuery
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parentDocId
private final int parentDocId
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Constructor Details
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ParentChildrenBlockJoinQuery
Creates aParentChildrenBlockJoinQuery
instance- Parameters:
parentFilter
- A filter identifying parent documents.childQuery
- A child query that determines which child docs are matchingparentDocId
- The top level doc id of that parent to return children documents for
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Method Details
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equals
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 to those of the other instance. Utility methods are provided for certain repetitive code.
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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. -
toString
Description copied from class:Query
Prints a query to a string, withfield
assumed to be the default field and omitted. -
visit
Description copied from class:Query
Recurse through the query tree, visiting any child queries. -
rewrite
Description copied from class:Query
Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.Callers are expected to call
rewrite
multiple times if necessary, until the rewritten query is the same as the original query.The rewrite process may be able to make use of IndexSearcher's executor and be executed in parallel if the executor is provided.
However, if any of the intermediary queries do not satisfy the new API, parallel rewrite is not possible for any subsequent sub-queries. To take advantage of this API, the entire query tree must override this method.
- Overrides:
rewrite
in classQuery
- Throws:
IOException
- See Also:
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createWeight
public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws 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:
IOException
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