org.openrdf.sail.federation.evaluation
Class ParallelLeftJoinCursor

java.lang.Object
  info.aduna.iteration.CloseableIterationBase<E,X>
      info.aduna.iteration.LookAheadIteration<BindingSet,QueryEvaluationException>
          org.openrdf.sail.federation.evaluation.ParallelLeftJoinCursor

All Implemented Interfaces:

CloseableIteration<BindingSet,QueryEvaluationException>, Iteration<BindingSet,QueryEvaluationException>, Runnable

public class ParallelLeftJoinCursor
extends LookAheadIteration<BindingSet,QueryEvaluationException>
implements Runnable

Transform the condition into a filter and the right side into an AlternativeCursor, then evaluate as a ParallelJoinCursor.

Author:

James Leigh

Constructor Summary

ParallelLeftJoinCursor(EvaluationStrategy strategy, LeftJoin join, BindingSet bindings)

Method Summary

BindingSet	getNextElement()
void	handleClose()
void	run()
String	toString()

Methods inherited from class info.aduna.iteration.LookAheadIteration

hasNext, next, remove

Methods inherited from class info.aduna.iteration.CloseableIterationBase

close, isClosed

Methods inherited from class java.lang.Object

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

Constructor Detail

ParallelLeftJoinCursor

public ParallelLeftJoinCursor(EvaluationStrategy strategy,
                              LeftJoin join,
                              BindingSet bindings)
                       throws QueryEvaluationException

Throws:

QueryEvaluationException

Method Detail

run

public void run()

Specified by:

run in interface Runnable

getNextElement

public BindingSet getNextElement()
                          throws QueryEvaluationException

Specified by:

getNextElement in class LookAheadIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

handleClose

public void handleClose()
                 throws QueryEvaluationException

Overrides:

handleClose in class LookAheadIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

toString

public String toString()

Overrides:

toString in class Object