org.apache.lucene.search

Class ConstantScoreQuery

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.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ConstantScoreQuery(Filter filter)

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o) Returns true if o is equal to this.
void	extractTerms(java.util.Set terms) Expert: adds all terms occuring 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

getClass, notify, notifyAll, wait, wait, wait

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 occuring in this query to the terms set. Only works if this query is in its rewritten form.

Overrides:

extractTerms 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 java.lang.Object

hashCode

public int hashCode()

Returns a hash code value for this object.

Overrides:

hashCode in class java.lang.Object