Package org.apache.lucene.search
Class TopTermsRewrite<Q extends Query>
- java.lang.Object
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- org.apache.lucene.search.MultiTermQuery.RewriteMethod
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- org.apache.lucene.search.TopTermsRewrite<Q>
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- All Implemented Interfaces:
Serializable
- Direct Known Subclasses:
MultiTermQuery.TopTermsBoostOnlyBooleanQueryRewrite
,MultiTermQuery.TopTermsScoringBooleanQueryRewrite
public abstract class TopTermsRewrite<Q extends Query> extends MultiTermQuery.RewriteMethod
Base rewrite method for collecting only the top terms via a priority queue.- See Also:
- Serialized Form
- NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.
- Only public to be accessible by spans package.
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Constructor Summary
Constructors Constructor Description TopTermsRewrite(int size)
Create a TopTermsBooleanQueryRewrite for at mostsize
terms.
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description protected abstract void
addClause(Q 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)
protected abstract int
getMaxSize()
return the maximum size of the priority queue (for boolean rewrites this is BooleanQuery#getMaxClauseCount).int
getSize()
return the maximum priority queue sizeprotected abstract Q
getTopLevelQuery()
Return a suitable top-level Query for holding all expanded terms.int
hashCode()
Q
rewrite(IndexReader reader, MultiTermQuery query)
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Methods inherited from class org.apache.lucene.search.MultiTermQuery.RewriteMethod
getTermsEnum
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Constructor Detail
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TopTermsRewrite
public TopTermsRewrite(int size)
Create a TopTermsBooleanQueryRewrite for at mostsize
terms.NOTE: if
BooleanQuery.getMaxClauseCount()
is smaller thansize
, then it will be used instead.
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Method Detail
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getSize
public int getSize()
return the maximum priority queue size
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getMaxSize
protected abstract int getMaxSize()
return the maximum size of the priority queue (for boolean rewrites this is BooleanQuery#getMaxClauseCount).
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rewrite
public Q rewrite(IndexReader reader, MultiTermQuery query) throws IOException
- Specified by:
rewrite
in classMultiTermQuery.RewriteMethod
- Throws:
IOException
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getTopLevelQuery
protected abstract Q getTopLevelQuery() throws IOException
Return a suitable top-level Query for holding all expanded terms.- Throws:
IOException
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addClause
protected abstract void addClause(Q topLevel, Term term, float boost) throws IOException
Add a MultiTermQuery term to the top-level query- 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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