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

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

All Implemented Interfaces:

Condition

public class EquiJoin
extends AbstractCondition

EquiJoin implements an equi join condition.

Field Summary

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

inner

Constructor Summary

EquiJoin(MultiColumnQueryHits inner, int innerScoreNodeIndex, NamespaceMappings nsMappings, org.apache.lucene.index.IndexReader reader, Name innerProperty, Name outerProperty)
Creates a new equi join condition.

Method Summary

ScoreNode[][]

getMatchingScoreNodes(ScoreNode outer) 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

EquiJoin

public EquiJoin(MultiColumnQueryHits inner,
                int innerScoreNodeIndex,
                NamespaceMappings nsMappings,
                org.apache.lucene.index.IndexReader reader,
                Name innerProperty,
                Name outerProperty)
         throws IOException,
                IllegalNameException

Creates a new equi join condition.

Parameters:

inner - the inner query hits.

innerScoreNodeIndex - the selector name for the inner query hits.

scs - the sort comparator source.

reader - the index reader.

innerProperty - the name of the property of the inner query hits.

outerProperty - the name of the property of the outer query hits.

Throws:

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

IllegalNameException

Method Detail

getMatchingScoreNodes

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

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

Parameters:

outer - 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.