Class RewriteQuery<SQ extends SrndQuery>
- java.lang.Object
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- org.apache.lucene.search.Query
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- org.apache.lucene.queryparser.surround.query.RewriteQuery<SQ>
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- Direct Known Subclasses:
DistanceRewriteQuery
,SimpleTermRewriteQuery
abstract class RewriteQuery<SQ extends SrndQuery> extends Query
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Field Summary
Fields Modifier and Type Field Description protected java.lang.String
fieldName
protected BasicQueryFactory
qf
protected SQ
srndQuery
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Constructor Summary
Constructors Constructor Description RewriteQuery(SQ srndQuery, java.lang.String fieldName, BasicQueryFactory qf)
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description boolean
equals(java.lang.Object other)
Override and implement query instance equivalence properly in a subclass.private boolean
equalsTo(RewriteQuery<?> other)
int
hashCode()
Override and implement query hash code properly in a subclass.abstract Query
rewrite(IndexSearcher indexSearcher)
Expert: called to re-write queries into primitive queries.java.lang.String
toString(java.lang.String field)
Prints a query to a string, withfield
assumed to be the default field and omitted.-
Methods inherited from class org.apache.lucene.search.Query
classHash, createWeight, rewrite, sameClassAs, toString, visit
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Field Detail
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fieldName
protected final java.lang.String fieldName
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qf
protected final BasicQueryFactory qf
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Constructor Detail
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RewriteQuery
RewriteQuery(SQ srndQuery, java.lang.String fieldName, BasicQueryFactory qf)
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Method Detail
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rewrite
public abstract Query rewrite(IndexSearcher indexSearcher) throws java.io.IOException
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:
java.io.IOException
- See Also:
IndexSearcher.rewrite(Query)
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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.
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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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equals
public 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 to those of the 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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equalsTo
private boolean equalsTo(RewriteQuery<?> other)
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