org.apache.jackrabbit.core.query.lucene
Class RangeQuery

java.lang.Object
  org.apache.lucene.search.Query
      org.apache.jackrabbit.core.query.lucene.RangeQuery

All Implemented Interfaces:

Cloneable, Serializable

public class RangeQuery

extends org.apache.lucene.search.Query

Implements a variant of the lucene class RangeQuery. This class does not rewrite to basic TermQuery but will calculate the matching documents itself. That way a TooManyClauses can be avoided.

See Also:

Serialized Form

Constructor Summary

RangeQuery(org.apache.lucene.index.Term lowerTerm, org.apache.lucene.index.Term upperTerm, boolean inclusive)
Creates a new RangeQuery.

Method Summary

protected org.apache.lucene.search.Weight	createWeight(org.apache.lucene.search.Searcher searcher) Creates the Weight for this query.
org.apache.lucene.search.Query	rewrite(org.apache.lucene.index.IndexReader reader) Tries to rewrite this query into a standard lucene RangeQuery.
String	toString(String field) Returns a string representation 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

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RangeQuery

public RangeQuery(org.apache.lucene.index.Term lowerTerm,
                  org.apache.lucene.index.Term upperTerm,
                  boolean inclusive)

Creates a new RangeQuery. The lower or the upper term may be null, but not both!

Parameters:

lowerTerm - the lower term of the interval, or null

upperTerm - the upper term of the interval, or null.

inclusive - if true the interval is inclusive.

Method Detail

rewrite

public org.apache.lucene.search.Query rewrite(org.apache.lucene.index.IndexReader reader)
                                       throws IOException

Tries to rewrite this query into a standard lucene RangeQuery. This rewrite might fail with a TooManyClauses exception. If that happens, we use our own implementation.

Parameters:

reader - the index reader.

Returns:

the rewritten query or this query if rewriting is not possible.

Throws:

IOException - if an error occurs.

createWeight

protected org.apache.lucene.search.Weight createWeight(org.apache.lucene.search.Searcher searcher)

Creates the Weight for this query.

Parameters:

searcher - the searcher to use for the Weight.

Returns:

the Weigth for this query.

toString

public String toString(String field)

Returns a string representation of this query.

Parameters:

field - the field name for which to create a string representation.

Returns:

a string representation of this query.