Package org.apache.lucene.search
Class MultiTermQuery.ConstantScoreAutoRewrite
- java.lang.Object
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- org.apache.lucene.search.MultiTermQuery.RewriteMethod
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- org.apache.lucene.search.MultiTermQuery.ConstantScoreAutoRewrite
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- All Implemented Interfaces:
Serializable
- Enclosing class:
- MultiTermQuery
public static class MultiTermQuery.ConstantScoreAutoRewrite extends MultiTermQuery.RewriteMethod
A rewrite method that tries to pick the best constant-score rewrite method based on term and document counts from the query. If both the number of terms and documents is small enough, thenMultiTermQuery.CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE
is used. Otherwise,MultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE
is used.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description static double
DEFAULT_DOC_COUNT_PERCENT
static int
DEFAULT_TERM_COUNT_CUTOFF
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Constructor Summary
Constructors Constructor Description ConstantScoreAutoRewrite()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected void
addClause(BooleanQuery topLevel, Term term, float boost)
Add a MultiTermQuery term to the top-level queryprotected void
collectTerms(IndexReader reader, MultiTermQuery query, org.apache.lucene.search.TermCollectingRewrite.TermCollector collector)
boolean
equals(Object obj)
double
getDocCountPercent()
int
getTermCountCutoff()
protected BooleanQuery
getTopLevelQuery()
Return a suitable top-level Query for holding all expanded terms.int
hashCode()
Query
rewrite(IndexReader reader, MultiTermQuery query)
void
setDocCountPercent(double percent)
If the number of documents to be visited in the postings exceeds this specified percentage of the maxDoc() for the index, thenMultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE
is used.void
setTermCountCutoff(int count)
If the number of terms in this query is equal to or larger than this setting thenMultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE
is used.-
Methods inherited from class org.apache.lucene.search.MultiTermQuery.RewriteMethod
getTermsEnum
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Method Detail
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setTermCountCutoff
public void setTermCountCutoff(int count)
If the number of terms in this query is equal to or larger than this setting thenMultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE
is used.
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getTermCountCutoff
public int getTermCountCutoff()
- See Also:
setTermCountCutoff(int)
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setDocCountPercent
public void setDocCountPercent(double percent)
If the number of documents to be visited in the postings exceeds this specified percentage of the maxDoc() for the index, thenMultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE
is used.- Parameters:
percent
- 0.0 to 100.0
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getDocCountPercent
public double getDocCountPercent()
- See Also:
setDocCountPercent(double)
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getTopLevelQuery
protected BooleanQuery getTopLevelQuery()
Return a suitable top-level Query for holding all expanded terms.
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addClause
protected void addClause(BooleanQuery topLevel, Term term, float boost)
Add a MultiTermQuery term to the top-level query
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rewrite
public Query rewrite(IndexReader reader, MultiTermQuery query) throws IOException
- Specified by:
rewrite
in classMultiTermQuery.RewriteMethod
- Throws:
IOException
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collectTerms
protected final void collectTerms(IndexReader reader, MultiTermQuery query, org.apache.lucene.search.TermCollectingRewrite.TermCollector collector) throws IOException
- Throws:
IOException
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