org.apache.commons.workflow.core
Class NotAndStep

java.lang.Object
  org.apache.commons.workflow.base.BaseStep
      org.apache.commons.workflow.base.DescriptorStep
          org.apache.commons.workflow.core.GotoStep
              org.apache.commons.workflow.core.NotAndStep

All Implemented Interfaces:

Descriptors, Step

public class NotAndStep
extends GotoStep

Evaluate properties specified by the associated Descriptors, and transfer control to the specified step if ALL of them are false (if boolean) or null (if Object). This is the exact opposite of AndStep To avoid non-deterministic evaluation stack behavior, all of the specified Descriptors are always evaluated.

Supported Attributes:

• step - Identifier of the Step to which control should be transferred if the condition is not met.

Version:

$Revision: 155475 $ $Date: 2005-02-26 13:31:11 +0000 (Sat, 26 Feb 2005) $

Author:

Preston Sheldon

Field Summary

Fields inherited from class org.apache.commons.workflow.core.GotoStep

step

Fields inherited from class org.apache.commons.workflow.base.DescriptorStep

descriptors

Fields inherited from class org.apache.commons.workflow.base.BaseStep

id, nextStep, owner, previousStep

Constructor Summary

NotAndStep()
Construct a default instance of this Step.

NotAndStep(String id)
Construct an instance of this Step with the specified identifier.

NotAndStep(String id, String step)
Construct a fully configured instance of this Step.

NotAndStep(String id, String step, Descriptor descriptor)
Construct a fully configured instance of this Step.

Method Summary

void	execute(Context context) Perform the executable actions related to this Step, in the context of the specified Context.

Methods inherited from class org.apache.commons.workflow.core.GotoStep

getStep, setStep, toString

Methods inherited from class org.apache.commons.workflow.base.DescriptorStep

addDescriptor, findDescriptors, removeDescriptor

Methods inherited from class org.apache.commons.workflow.base.BaseStep

getId, getNextStep, getOwner, getPreviousStep, setId, setNextStep, setOwner, setPreviousStep

Methods inherited from class java.lang.Object

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

Constructor Detail

NotAndStep

public NotAndStep()

Construct a default instance of this Step.

NotAndStep

public NotAndStep(String id)

Construct an instance of this Step with the specified identifier.

Parameters:

id - Step identifier

NotAndStep

public NotAndStep(String id,
                  String step)

Construct a fully configured instance of this Step.

Parameters:

id - Step identifier of this step

step - Step identifier to which control should be redirected

NotAndStep

public NotAndStep(String id,
                  String step,
                  Descriptor descriptor)

Construct a fully configured instance of this Step.

Parameters:

id - Step identifier of this step

step - Step identifier to which control should be redirected

descriptor - Initial descriptor to be added

Method Detail

execute

public void execute(Context context)
             throws StepException

Perform the executable actions related to this Step, in the context of the specified Context.

Specified by:

execute in interface Step

Overrides:

execute in class GotoStep

Parameters:

context - The Context that is tracking our execution state

Throws:

StepException - if a processing error has occurred