ScoringRewrite (Lucene 3.6.2 API)

java.lang.Object
- org.apache.lucene.search.MultiTermQuery.RewriteMethod
- - org.apache.lucene.search.ScoringRewrite<Q>

All Implemented Interfaces:

Serializable
```
public abstract class ScoringRewrite<Q extends Query>
extends MultiTermQuery.RewriteMethod
```
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.

Field Summary

Fields
Modifier and Type	Field	Description
`static MultiTermQuery.RewriteMethod`	`CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE`	Like `SCORING_BOOLEAN_QUERY_REWRITE` except scores are not computed.
`static ScoringRewrite<BooleanQuery>`	`SCORING_BOOLEAN_QUERY_REWRITE`	A rewrite method that first translates each term into `BooleanClause.Occur.SHOULD` clause in a BooleanQuery, and keeps the scores as computed by the query.

Constructor Summary

Constructors
Constructor Description

ScoringRewrite()

Constructors
Constructor	Description
`ScoringRewrite()`

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 query
`protected void`	`collectTerms(IndexReader reader, MultiTermQuery query, org.apache.lucene.search.TermCollectingRewrite.TermCollector collector)`
`protected abstract Q`	`getTopLevelQuery()`	Return a suitable top-level Query for holding all expanded terms.
`Q`	`rewrite(IndexReader reader, MultiTermQuery query)`

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

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

- Field Detail
  - SCORING_BOOLEAN_QUERY_REWRITE
```
public static final ScoringRewrite<BooleanQuery> SCORING_BOOLEAN_QUERY_REWRITE
```
    A rewrite method that first translates each term into BooleanClause.Occur.SHOULD clause in a BooleanQuery, and keeps the scores as computed by the query. Note that typically such scores are meaningless to the user, and require non-trivial CPU to compute, so it's almost always better to use MultiTermQuery.CONSTANT_SCORE_AUTO_REWRITE_DEFAULT instead.
    NOTE: This rewrite method will hit BooleanQuery.TooManyClauses if the number of terms exceeds BooleanQuery.getMaxClauseCount().
    
    See Also:
    
    MultiTermQuery.setRewriteMethod(org.apache.lucene.search.MultiTermQuery.RewriteMethod)
  - CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE
```
public static final MultiTermQuery.RewriteMethod CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE
```
    Like SCORING_BOOLEAN_QUERY_REWRITE except scores are not computed. Instead, each matching document receives a constant score equal to the query's boost.
    NOTE: This rewrite method will hit BooleanQuery.TooManyClauses if the number of terms exceeds BooleanQuery.getMaxClauseCount().
    
    See Also:
    
    MultiTermQuery.setRewriteMethod(org.apache.lucene.search.MultiTermQuery.RewriteMethod)
- Constructor Detail
  - ScoringRewrite
```
public ScoringRewrite()
```
- Method Detail
  - rewrite
```
public Q rewrite(IndexReader reader,
                 MultiTermQuery query)
          throws IOException
```
    Specified by:
    
    rewrite in class MultiTermQuery.RewriteMethod
    
    Throws:
    
    IOException
  - getTopLevelQuery
```
protected abstract Q getTopLevelQuery()
                               throws IOException
```
    Return a suitable top-level Query for holding all expanded terms.
    
    Throws:
    
    IOException
  - addClause
```
protected abstract void addClause(Q topLevel,
                                  Term term,
                                  float boost)
                           throws IOException
```
    Add a MultiTermQuery term to the top-level query
    
    Throws:
    
    IOException
  - collectTerms
```
protected final void collectTerms(IndexReader reader,
                                  MultiTermQuery query,
                                  org.apache.lucene.search.TermCollectingRewrite.TermCollector collector)
                           throws IOException
```
    Throws:
    
    IOException

Class ScoringRewrite<Q extends Query>

Field Summary

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Object

Field Detail

SCORING_BOOLEAN_QUERY_REWRITE

CONSTANT_SCORE_BOOLEAN_QUERY_REWRITE

Constructor Detail

ScoringRewrite

Method Detail

rewrite

getTopLevelQuery

addClause

collectTerms