ConstantScoreQuery (Lucene 2.9.4 API)

java.lang.Object
- org.apache.lucene.search.Query
- - org.apache.lucene.search.ConstantScoreQuery

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable
```
public class ConstantScoreQuery
extends Query
```
A query that wraps a filter and simply returns a constant score equal to the query boost for every document in the filter.

Version:

$Id: ConstantScoreQuery.java 807180 2009-08-24 12:26:43Z markrmiller $

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

protected class ConstantScoreQuery.ConstantScorer

protected class ConstantScoreQuery.ConstantWeight

Nested Classes
Modifier and Type	Class and Description
`protected class`	`ConstantScoreQuery.ConstantScorer`
`protected class`	`ConstantScoreQuery.ConstantWeight`

Field Summary

Fields
Modifier and Type Field and Description

protected Filter filter

Fields
Modifier and Type	Field and Description
`protected Filter`	`filter`

Constructor Summary

Constructors
Constructor and Description

ConstantScoreQuery(Filter filter)

Constructors
Constructor and Description
`ConstantScoreQuery(Filter filter)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Weight`	`createWeight(Searcher searcher)` Expert: Constructs an appropriate Weight implementation for this query.
`boolean`	`equals(java.lang.Object o)` Returns true if `o` is equal to this.
`void`	`extractTerms(java.util.Set terms)` Expert: adds all terms occurring in this query to the terms set.
`Filter`	`getFilter()` Returns the encapsulated filter
`int`	`hashCode()` Returns a hash code value for this object.
`Query`	`rewrite(IndexReader reader)` Expert: called to re-write queries into primitive queries.
`java.lang.String`	`toString(java.lang.String field)` Prints a user-readable version of this query.

Methods inherited from class org.apache.lucene.search.Query
clone, combine, getBoost, getSimilarity, mergeBooleanQueries, setBoost, toString, weight

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

- Field Detail
  - filter
```
protected final Filter filter
```
- Constructor Detail
  - ConstantScoreQuery
```
public ConstantScoreQuery(Filter filter)
```
- Method Detail
  - getFilter
```
public Filter getFilter()
```
    Returns the encapsulated filter
  - rewrite
```
public Query rewrite(IndexReader reader)
              throws java.io.IOException
```
    Description copied from class: Query
    
    Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.
    
    Overrides:
    
    rewrite in class Query
    
    Throws:
    
    java.io.IOException
  - extractTerms
```
public void extractTerms(java.util.Set terms)
```
    Description copied from class: Query
    
    Expert: adds all terms occurring in this query to the terms set. Only works if this query is in its rewritten form.
    
    Overrides:
    
    extractTerms in class Query
  - createWeight
```
public Weight createWeight(Searcher searcher)
```
    Description copied from class: Query
    
    Expert: Constructs an appropriate Weight implementation for this query.
    Only implemented by primitive queries, which re-write to themselves.
    
    Overrides:
    
    createWeight in class Query
  - toString
```
public java.lang.String toString(java.lang.String field)
```
    Prints a user-readable version of this query.
    
    Specified by:
    
    toString in class Query
  - equals
```
public boolean equals(java.lang.Object o)
```
    Returns true if o is equal to this.
    
    Overrides:
    
    equals in class Query
  - hashCode
```
public int hashCode()
```
    Returns a hash code value for this object.
    
    Overrides:
    
    hashCode in class Query

Class ConstantScoreQuery

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class org.apache.lucene.search.Query

Methods inherited from class java.lang.Object

Field Detail

filter

Constructor Detail

ConstantScoreQuery

Method Detail

getFilter

rewrite

extractTerms

createWeight

toString

equals

hashCode