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

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

All Implemented Interfaces:

Condition

public class ParentNodeJoin
extends AbstractCondition

ParentNodeJoin implements a parent node join condition.

Field Summary

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

inner

Constructor Summary

ParentNodeJoin(MultiColumnQueryHits child, org.apache.lucene.index.IndexReader reader, HierarchyResolver resolver, ChildNodeJoinConditionImpl condition)
Creates a new parent node join condition.

Method Summary

ScoreNode[][]

getMatchingScoreNodes(ScoreNode parent) 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

ParentNodeJoin

public ParentNodeJoin(MultiColumnQueryHits child,
                      org.apache.lucene.index.IndexReader reader,
                      HierarchyResolver resolver,
                      ChildNodeJoinConditionImpl condition)
               throws IOException

Creates a new parent node join condition.

Parameters:

child - the inner query hits.

reader - the index reader.

resolver - the hierarchy resolver.

condition - the QOM child node join condition.

Throws:

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

Method Detail

getMatchingScoreNodes

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

Returns the matching inner score nodes for the given outer score node sn. The outer query hits loop contains the parent score nodes.

Parameters:

parent - 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.