Package edu.tufts.hrilab.action.execution

Class StepExecution

java.lang.Object

edu.tufts.hrilab.action.execution.StepExecution

public class StepExecution
extends Object

StepExecution the execution process for executing a context step: canDoStep, doStep, getNextStep, finishStep.

Field Summary

Fields

Modifier and Type	Field	Description
protected static final org.slf4j.Logger	log

Constructor Summary

Constructors

Constructor	Description
StepExecution(Context rootContext, ActionStack callStack)

Method Summary

Modifier and Type	Method	Description
Justification	canDoStep(Context context)	canDoStep initializes the context.
void	doStep(Context context)	doStep execute the context step: start overall condition monitors, update the state machine, if the step is an action, execute context.
Context	execute(Context step)	execute executes action: check pre conditions, argument constraints do step get next step finish
Justification	finishStep(Context context)	finishStep finish the context step: verify the effects, update state machine, if step is an action.
Context	getNextStep(Context context)	getNextAction selects the next sub step to be executed

Methods inherited from class java.lang.Object

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

Field Details

log

protected static final org.slf4j.Logger log

Constructor Details

StepExecution

public StepExecution(Context rootContext,
 ActionStack callStack)

Method Details

execute

public Context execute(Context step)

execute executes action: check pre conditions, argument constraints do step get next step finish

Parameters:

step - context to execute

Returns:

anypoint return next action or null

canDoStep

public Justification canDoStep(Context context)

canDoStep initializes the context. then checks to see if the action is approved to execute: permissible, pre-conditions, argument-constraints. then it will return the justification for whether the context can execute.

Parameters:

context - the context step which will be executed

Returns:

justification for why/not approved to execute.

doStep

public void doStep(Context context)

doStep execute the context step: start overall condition monitors, update the state machine, if the step is an action, execute context.

Parameters:

context - step to be executed

getNextStep

public Context getNextStep(Context context)

getNextAction selects the next sub step to be executed

Parameters:

context - the step that is being executed, used to get sub steps

Returns:

a sub step for to execute, may return null to depict no more steps or exitcontext

finishStep

public Justification finishStep(Context context)

finishStep finish the context step: verify the effects, update state machine, if step is an action. return a justifcation for success/failure.

Parameters:

context - step to be completes

Returns:

justification for success/failure