java.lang.Object | |
↳ | org.apache.lucene.search.Query |
Known Direct Subclasses |
Known Indirect Subclasses |
The abstract base class for queries.
Instantiable subclasses are:
TermQuery
MultiTermQuery
BooleanQuery
WildcardQuery
PhraseQuery
PrefixQuery
MultiPhraseQuery
FuzzyQuery
TermRangeQuery
NumericRangeQuery
SpanQuery
A parser for queries is contained in:
Public Constructors | |||||||||||
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Public Methods | |||||||||||
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Returns a clone of this query.
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Expert: called when re-writing queries under MultiSearcher.
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Expert: Constructs an appropriate Weight implementation for this query.
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Expert: adds all terms occurring in this query to the terms set.
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Gets the boost for this clause.
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Expert: Returns the Similarity implementation to be used for this query.
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Expert: merges the clauses of a set of BooleanQuery's into a single
BooleanQuery.
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Expert: called to re-write queries into primitive queries.
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Sets the boost for this query clause to
b . | |||||||||||
Prints a query to a string.
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Prints a query to a string, with
field assumed to be the
default field and omitted. | |||||||||||
Expert: Constructs and initializes a Weight for a top-level query.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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Expert: called when re-writing queries under MultiSearcher. Create a single query suitable for use by all subsearchers (in 1-1 correspondence with queries). This is an optimization of the OR of all queries. We handle the common optimization cases of equal queries and overlapping clauses of boolean OR queries (as generated by MultiTermQuery.rewrite()). Be careful overriding this method as queries[0] determines which method will be called and is not necessarily of the same type as the other queries.
Expert: Constructs an appropriate Weight implementation for this query.
Only implemented by primitive queries, which re-write to themselves.
IOException |
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Expert: adds all terms occurring in this query to the terms set. Only
works if this query is in its rewritten
form.
UnsupportedOperationException | if this query is not yet rewritten |
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Gets the boost for this clause. Documents matching
this clause will (in addition to the normal weightings) have their score
multiplied by b
. The boost is 1.0 by default.
Expert: Returns the Similarity implementation to be used for this query. Subclasses may override this method to specify their own Similarity implementation, perhaps one that delegates through that of the Searcher. By default the Searcher's Similarity implementation is returned.
Expert: merges the clauses of a set of BooleanQuery's into a single BooleanQuery.
A utility for use by combine(Query[])
implementations.
Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.
IOException |
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Sets the boost for this query clause to b
. Documents
matching this clause will (in addition to the normal weightings) have
their score multiplied by b
.
Prints a query to a string, with field
assumed to be the
default field and omitted.
The representation used is one that is supposed to be readable
by QueryParser
. However,
there are the following limitations:
Expert: Constructs and initializes a Weight for a top-level query.
IOException |
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