com.bigdata.relation.rule.eval
Class EmptyProgramTask

java.lang.Object
  com.bigdata.relation.rule.eval.EmptyProgramTask

All Implemented Interfaces:

IProgramTask, Callable<Object>

public class EmptyProgramTask
extends Object
implements IProgramTask

Provides execution for an "empty" program.

Version:

$Id: EmptyProgramTask.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

Constructor Summary

EmptyProgramTask(ActionEnum action, IStep step)

Method Summary

Object

call() The return will be either an IChunkedOrderedIterator (for ActionEnum.Query) or a Long element mutation count (for ActionEnum.Insert or ActionEnum.Delete).

Methods inherited from class java.lang.Object

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

Constructor Detail

EmptyProgramTask

public EmptyProgramTask(ActionEnum action,
                        IStep step)

Parameters:

action -

step -

Throws:

IllegalArgumentException - if any argument is null.

IllegalArgumentException - unless the step is an empty IProgram.

Method Detail

call

public Object call()

Description copied from interface: IProgramTask

The return will be either an IChunkedOrderedIterator (for ActionEnum.Query) or a Long element mutation count (for ActionEnum.Insert or ActionEnum.Delete).

Specified by:

call in interface IProgramTask

Specified by:

call in interface Callable<Object>