MultiTermQuery.TopTermsBoostOnlyBooleanQueryRewrite (Lucene 3.6.2 API)

java.lang.Object
- org.apache.lucene.search.MultiTermQuery.RewriteMethod
- - org.apache.lucene.search.TopTermsRewrite<BooleanQuery>
  - - org.apache.lucene.search.MultiTermQuery.TopTermsBoostOnlyBooleanQueryRewrite

All Implemented Interfaces:

Serializable

Enclosing class:

MultiTermQuery
```
public static final class MultiTermQuery.TopTermsBoostOnlyBooleanQueryRewrite
extends TopTermsRewrite<BooleanQuery>
```
A rewrite method that first translates each term into BooleanClause.Occur.SHOULD clause in a BooleanQuery, but the scores are only computed as the boost.
This rewrite method only uses the top scoring terms so it will not overflow the boolean max clause count.

See Also:

MultiTermQuery.setRewriteMethod(org.apache.lucene.search.MultiTermQuery.RewriteMethod), Serialized Form

Constructor Summary

Constructors
Constructor Description

TopTermsBoostOnlyBooleanQueryRewrite(int size)
Create a TopTermsBoostOnlyBooleanQueryRewrite for at most size terms.

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 query
`protected void`	`collectTerms(IndexReader reader, MultiTermQuery query, org.apache.lucene.search.TermCollectingRewrite.TermCollector collector)`
`protected int`	`getMaxSize()`	return the maximum size of the priority queue (for boolean rewrites this is BooleanQuery#getMaxClauseCount).
`protected BooleanQuery`	`getTopLevelQuery()`	Return a suitable top-level Query for holding all expanded terms.

Methods inherited from class org.apache.lucene.search.TopTermsRewrite
equals, getSize, hashCode, rewrite

Methods inherited from class org.apache.lucene.search.MultiTermQuery.RewriteMethod
getTermsEnum

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - TopTermsBoostOnlyBooleanQueryRewrite
```
public TopTermsBoostOnlyBooleanQueryRewrite(int size)
```
    Create a TopTermsBoostOnlyBooleanQueryRewrite for at most size terms.
    NOTE: if BooleanQuery.getMaxClauseCount() is smaller than size, then it will be used instead.
- Method Detail
  - getMaxSize
```
protected int getMaxSize()
```
    Description copied from class: TopTermsRewrite
    
    return the maximum size of the priority queue (for boolean rewrites this is BooleanQuery#getMaxClauseCount).
    
    Specified by:
    
    getMaxSize in class TopTermsRewrite<BooleanQuery>
  - 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
  - collectTerms
```
protected final void collectTerms(IndexReader reader,
                                  MultiTermQuery query,
                                  org.apache.lucene.search.TermCollectingRewrite.TermCollector collector)
                           throws IOException
```
    Throws:
    
    IOException