org.apache.lucene.search

Class FieldValueQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.FieldValueQuery

All Implemented Interfaces:

Cloneable

public final class FieldValueQuery
extends Query

A Query that matches documents that have a value for a given field as reported by LeafReader.getDocsWithField(String).

Constructor Summary

Constructors

Constructor and Description
FieldValueQuery(String field) Create a query that will match that have a value for the given field.

Method Summary

Modifier and Type	Method and Description
Weight	createWeight(IndexSearcher searcher, boolean needsScores) Expert: Constructs an appropriate Weight implementation for this query.
boolean	equals(Object obj)
int	hashCode()
String	toString(String field) Prints a query to a string, with field assumed to be the default field and omitted.

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

clone, getBoost, rewrite, setBoost, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

FieldValueQuery

public FieldValueQuery(String field)

Create a query that will match that have a value for the given field.

Method Detail

equals

public boolean equals(Object obj)

Overrides:

equals in class Query

hashCode

public int hashCode()

Overrides:

hashCode in class Query

toString

public String toString(String field)

Description copied from class: Query

Prints a query to a string, with field assumed to be the default field and omitted.

Specified by:

toString in class Query

createWeight

public Weight createWeight(IndexSearcher searcher,
                           boolean needsScores)
                    throws IOException

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

needsScores - True if document scores (Scorer.score()) or match frequencies (Scorer.freq()) are needed.

Throws:

IOException