org.apache.jackrabbit.core.query.lucene.join
Class DescendantNodeJoin

java.lang.Object
  org.apache.jackrabbit.core.query.lucene.join.AbstractCondition
      org.apache.jackrabbit.core.query.lucene.join.DescendantNodeJoin

All Implemented Interfaces:

Condition

public class DescendantNodeJoin
extends AbstractCondition

DescendantNodeJoin implements a descendant node join condition.

Field Summary

Fields inherited from class org.apache.jackrabbit.core.query.lucene.join.AbstractCondition

inner

Constructor Summary

DescendantNodeJoin(MultiColumnQueryHits context, Name contextSelectorName, org.apache.lucene.index.IndexReader reader, HierarchyResolver resolver)
Creates a new descendant node join condition.

Method Summary

ScoreNode[][]

getMatchingScoreNodes(ScoreNode descendant) Returns the matching inner score nodes for the given outer score node sn.

Methods inherited from class org.apache.jackrabbit.core.query.lucene.join.AbstractCondition

close, getIndex, getInnerSelectorNames

Methods inherited from class java.lang.Object

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

Constructor Detail

DescendantNodeJoin

public DescendantNodeJoin(MultiColumnQueryHits context,
                          Name contextSelectorName,
                          org.apache.lucene.index.IndexReader reader,
                          HierarchyResolver resolver)
                   throws IOException

Creates a new descendant node join condition.

Parameters:

context - the inner query hits.

contextSelectorName - the selector name for the inner query hits.

reader - the index reader.

resolver - the hierarchy resolver.

Throws:

IOException - if an error occurs while reading fromt the index.

Method Detail

getMatchingScoreNodes

public ScoreNode[][] getMatchingScoreNodes(ScoreNode descendant)
                                    throws IOException

Returns the matching inner score nodes for the given outer score node sn.

The outer query hits loop contains the descendant nodes.

Parameters:

descendant - the current score nodes of the outer source.

Returns:

the matching score nodes in the inner source.

Throws:

IOException - if an error occurs while evaluating the condition.