org.apache.commons.workflow.base
Class BaseStep

java.lang.Object
  org.apache.commons.workflow.base.BaseStep

All Implemented Interfaces:

Step

Direct Known Subclasses:

BreakStep, CallStep, ContinueStep, DescriptorStep, DuplicateStep, ExitStep, ForwardStep, GetStep, GotoStep, IncludeStep23, LoadStep, PeekStep, PopStep, ReadStep, StringStep, SuspendStep, SwapStep, WriteStep

public abstract class BaseStep
extends Object
implements Step

BaseStep is a convenient base class for more sophisticated Step implementations. It includes management of the static relationships of Steps to each other, and to their owning Activity, but requires the implementation to provide an execute() method.

Version:

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

Author:

Craig R. McClanahan

Field Summary

protected String	id The unique identifier (within this Activity) of this Step.
protected Step	nextStep The next Step in our associated Activity.
protected Owner	owner The Activity or Block that owns this Step.
protected Step	previousStep The previous Step in our associated Activity.

Constructor Summary

BaseStep()

Method Summary

abstract void	execute(Context context) Perform the executable actions related to this Step, in the context of the specified Context.
String	getId() Return the unique identifier (within this Activity or Block) of this Step.
Step	getNextStep() Return the next Step in our associated Activity or Block.
Owner	getOwner() Return the Activity or Block that owns this Step.
Step	getPreviousStep() Return the previous Step in our associated Activity or Block.
void	setId(String id) Set the unique identifier (within this Activity or Block) of this Step.
void	setNextStep(Step nextStep) Set the next Step in our associated Activity or Block.
void	setOwner(Owner owner) Set the Activity or Block that owns this Step.
void	setPreviousStep(Step previousStep) Set the previous Step in our associated Activity or Block.

Methods inherited from class java.lang.Object

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

Field Detail

id

protected String id

The unique identifier (within this Activity) of this Step.

nextStep

protected Step nextStep

The next Step in our associated Activity.

owner

protected Owner owner

The Activity or Block that owns this Step.

previousStep

protected Step previousStep

The previous Step in our associated Activity.

Constructor Detail

BaseStep

public BaseStep()

Method Detail

getId

public String getId()

Return the unique identifier (within this Activity or Block) of this Step.

Specified by:

getId in interface Step

setId

public void setId(String id)

Set the unique identifier (within this Activity or Block) of this Step.

Specified by:

setId in interface Step

Parameters:

id - The new unique identifier

getNextStep

public Step getNextStep()

Return the next Step in our associated Activity or Block.

Specified by:

getNextStep in interface Step

setNextStep

public void setNextStep(Step nextStep)

Set the next Step in our associated Activity or Block.

Specified by:

setNextStep in interface Step

Parameters:

nextStep - The new next Step

getOwner

public Owner getOwner()

Return the Activity or Block that owns this Step.

Specified by:

getOwner in interface Step

setOwner

public void setOwner(Owner owner)

Set the Activity or Block that owns this Step.

Specified by:

setOwner in interface Step

Parameters:

owner - The new owning Activity or Block

getPreviousStep

public Step getPreviousStep()

Return the previous Step in our associated Activity or Block.

Specified by:

getPreviousStep in interface Step

setPreviousStep

public void setPreviousStep(Step previousStep)

Set the previous Step in our associated Activity or Block.

Specified by:

setPreviousStep in interface Step

Parameters:

previousStep - The new previous Step

execute

public abstract 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

Parameters:

context - The Context that is tracking our execution state

Throws:

StepException - if a processing error has occurred