org.apache.lucene.search

Class PrefixQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.PrefixQuery

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class PrefixQuery
extends Query

A Query that matches documents containing terms with a specified prefix. A PrefixQuery is built by QueryParser for input like app*.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
PrefixQuery(Term prefix) Constructs a query for terms starting with prefix.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o) Returns true iff o is equal to this.
Term	getPrefix() Returns the prefix of this query.
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, createWeight, extractTerms, getBoost, getSimilarity, mergeBooleanQueries, setBoost, toString, weight

Methods inherited from class java.lang.Object

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

Constructor Detail

PrefixQuery

public PrefixQuery(Term prefix)

Constructs a query for terms starting with prefix.

Method Detail

getPrefix

public Term getPrefix()

Returns the prefix of this query.

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

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 iff 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