org.apache.commons.workflow.core
Class OrStep

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.OrStep

All Implemented Interfaces:

Descriptors, Step

public class OrStep
extends GotoStep

Evaluate properties specified by the associated Descriptors, and transfer control to the specified step if ANY of them are true (if boolean) or not null (if Object). 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 met.

Version:

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

Author:

Craig R. McClanahan

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

OrStep()
Construct a default instance of this Step.

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

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

OrStep(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

OrStep

public OrStep()

Construct a default instance of this Step.

OrStep

public OrStep(String id)

Construct an instance of this Step with the specified identifier.

Parameters:

id - Step identifier

OrStep

public OrStep(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

OrStep

public OrStep(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