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

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

All Implemented Interfaces:

Condition

public class AncestorNodeJoin
extends AbstractCondition

AncestorNodeJoin implements an ancestor node join condition.

Field Summary

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

inner

Constructor Summary

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

Method Summary

ScoreNode[][]

getMatchingScoreNodes(ScoreNode ancestor) 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

AncestorNodeJoin

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

Creates a new ancestor 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 from the index.

Method Detail

getMatchingScoreNodes

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

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

The outer query hits loop contains the ancestor score nodes.

Parameters:

ancestor - 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.