Class FunctionQuery
- java.lang.Object
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- org.apache.lucene.search.Query
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- org.apache.lucene.queries.function.FunctionQuery
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Constructor Summary
Constructors Constructor Description FunctionQuery(ValueSource func)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Weight
createWeight(IndexSearcher searcher)
Expert: Constructs an appropriate Weight implementation for this query.boolean
equals(Object o)
Returns true ifo
is equal to this.void
extractTerms(Set<Term> terms)
Expert: adds all terms occurring in this query to the terms set.ValueSource
getValueSource()
int
hashCode()
Returns a hash code value for this object.Query
rewrite(IndexReader reader)
Expert: called to re-write queries into primitive queries.String
toString(String field)
Prints a user-readable version of this query.
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Constructor Detail
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FunctionQuery
public FunctionQuery(ValueSource func)
- Parameters:
func
- defines the function to be used for scoring
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Method Detail
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getValueSource
public ValueSource getValueSource()
- Returns:
- The associated ValueSource
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rewrite
public Query rewrite(IndexReader reader) throws 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.- Overrides:
rewrite
in classQuery
- Throws:
IOException
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extractTerms
public void extractTerms(Set<Term> terms)
Description copied from class:Query
Expert: adds all terms occurring in this query to the terms set. Only works if this query is in itsrewritten
form.- Overrides:
extractTerms
in classQuery
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createWeight
public Weight createWeight(IndexSearcher searcher) 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
- Throws:
IOException
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equals
public boolean equals(Object o)
Returns true ifo
is equal to this.
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