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

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

All Implemented Interfaces:

Condition

public class ChildNodeJoin
extends AbstractCondition

ChildNodeJoin implements a child node join condition.

Field Summary

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

inner

Constructor Summary

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

Method Summary

ScoreNode[][]

getMatchingScoreNodes(ScoreNode child) 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

ChildNodeJoin

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

Creates a new child node join condition.

Parameters:

parent - 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 child)
                                    throws IOException

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

The outer query hits loop contains the child nodes.

Parameters:

child - 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.