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:

Serializable, Cloneable, Transformable, TransformConstants

Direct Known Subclasses:

LocalNameRangeQuery

public class RangeQuery
extends org.apache.lucene.search.Query
implements Transformable

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

Field Summary

Fields inherited from interface org.apache.jackrabbit.core.query.lucene.TransformConstants

TRANSFORM_LOWER_CASE, TRANSFORM_NONE, TRANSFORM_UPPER_CASE

Constructor Summary

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

RangeQuery(org.apache.lucene.index.Term lowerTerm, org.apache.lucene.index.Term upperTerm, boolean inclusive, int transform)
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.
void	extractTerms(Set terms)
org.apache.lucene.search.Query	rewrite(org.apache.lucene.index.IndexReader reader) Tries to rewrite this query into a standard lucene RangeQuery.
void	setTransformation(int transformation) Sets the transformation.
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.

RangeQuery

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

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.

transform - how term enums are transformed when read from the index.

Method Detail

setTransformation

public void setTransformation(int transformation)

Sets the transformation. Must be one of the following values:

• TransformConstants.TRANSFORM_LOWER_CASE
• TransformConstants.TRANSFORM_NONE
• TransformConstants.TRANSFORM_UPPER_CASE

Specified by:

setTransformation in interface Transformable

Parameters:

transformation - a transform constant.

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.

Overrides:

rewrite in class org.apache.lucene.search.Query

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.

Overrides:

createWeight in class org.apache.lucene.search.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.

Specified by:

toString in class org.apache.lucene.search.Query

Parameters:

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

Returns:

a string representation of this query.

extractTerms

public void extractTerms(Set terms)

Overrides:

extractTerms in class org.apache.lucene.search.Query