org.apache.lucene.search
Class MultiTermQuery.ConstantScoreAutoRewrite
java.lang.Object
org.apache.lucene.search.MultiTermQuery.RewriteMethod
org.apache.lucene.search.MultiTermQuery.ConstantScoreAutoRewrite
- 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, then MultiTermQuery.CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE
is used.
Otherwise, MultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE
is
used.
- See Also:
- Serialized Form
DEFAULT_TERM_COUNT_CUTOFF
public static int DEFAULT_TERM_COUNT_CUTOFF
DEFAULT_DOC_COUNT_PERCENT
public static double DEFAULT_DOC_COUNT_PERCENT
MultiTermQuery.ConstantScoreAutoRewrite
public MultiTermQuery.ConstantScoreAutoRewrite()
setTermCountCutoff
public void setTermCountCutoff(int count)
- If the number of terms in this query is equal to or
larger than this setting then
MultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE
is used.
getTermCountCutoff
public int getTermCountCutoff()
- See Also:
setTermCountCutoff(int)
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, then
MultiTermQuery.CONSTANT_SCORE_FILTER_REWRITE
is used.
- Parameters:
percent
- 0.0 to 100.0
getDocCountPercent
public double getDocCountPercent()
- See Also:
setDocCountPercent(double)
getTopLevelQuery
protected BooleanQuery getTopLevelQuery()
- Return a suitable top-level Query for holding all expanded terms.
addClause
protected void addClause(BooleanQuery topLevel,
Term term,
float boost)
- Add a MultiTermQuery term to the top-level query
rewrite
public Query rewrite(IndexReader reader,
MultiTermQuery query)
throws IOException
- Specified by:
rewrite
in class MultiTermQuery.RewriteMethod
- Throws:
IOException
hashCode
public int hashCode()
- Overrides:
hashCode
in class Object
equals
public boolean equals(Object obj)
- Overrides:
equals
in class Object
collectTerms
protected final void collectTerms(IndexReader reader,
MultiTermQuery query,
TermCollectingRewrite.TermCollector collector)
throws IOException
- Throws:
IOException
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