Package edu.tufts.hrilab.action.execution.control

Class ReturnContext

java.lang.Object

edu.tufts.hrilab.action.execution.Context

edu.tufts.hrilab.action.execution.control.ReturnContext

public class ReturnContext
extends Context

This is used to explicitly return from an action script early, just as you would from Java. Here, the exit will only propagate up the context tree until an action script or asynchronous context is encountered. This scoping is similar to Java in that a return only returns from a Java method.

Field Summary

Fields inherited from class edu.tufts.hrilab.action.execution.Context

caller, childContexts, cmd, constraints, endTime, log, maxTime, startTime, stateMachine

Constructor Summary

Constructors

Constructor	Description
ReturnContext(Context c, StateMachine sm)

Method Summary

Modifier and Type	Method	Description
ReturnContext	copy(Context newParent)	deep copy of the context, its status, and its children
void	doStep()	If Context has a concrete execution step to perform, it should happen in this method.
protected Context	getNextStepForType()	Get the next step (i.e., context) to be executed.

Methods inherited from class edu.tufts.hrilab.action.execution.Context

acquireLocks, addEvent, addEvent, addEvent, causedFailure, copyInternal, createSimulatedEquivalent, getActor, getActualLogicalValue, getArgument, getArguments, getArgumentSilent, getArgumentType, getArgumentValue, getChildContexts, getCommand, getConstraints, getContextDescription, getContextDescription, getDuration, getElapsedTime, getEndTime, getEquivalentContext, getEvaluatedArgument, getExecType, getId, getJustification, getLocalArgument, getLogicalValue, getMaxTime, getNearestTerminatedAncestor, getNextStep, getParentContext, getRootContext, getSignatureInPredicateForm, getStartTime, getStateMachine, getStateUpdates, getStatus, hasNormCheckingAncestor, isAction, isApproved, isAsynchronous, isFailure, isSimulation, isSuccess, isTerminated, performAdditionalStatusUpdates, releaseLocks, resetConcreteContext, resetContext, resetCoreContext, setChildContexts, setConstraints, setEndTime, setExecType, setLogicalValue, setStartTime, setStartTime, setStateMachine, setStatus, setStatus, setTimeout, setupNextStep, setupNextStep, startOverAllMonitor, toString, updatePerformanceModels, verifyEffects, verifyReturnValue, waitForTermination, waitForTermination

Methods inherited from class java.lang.Object

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

Constructor Details

ReturnContext

public ReturnContext(Context c,
 StateMachine sm)

Method Details

doStep

public void doStep()

Description copied from class: Context

If Context has a concrete execution step to perform, it should happen in this method. This should not include setting up next steps (i.e., children to perform), which should happen in the setupNextStep method. Primitive actions and operators (i.e., leaf nodes in the context tree) are examples where this method should be implemented.

Overrides:

doStep in class Context

getNextStepForType

protected Context getNextStepForType()

Description copied from class: Context

Get the next step (i.e., context) to be executed. Returns null if there are no more steps. TODO: remove this method

Overrides:

getNextStepForType in class Context

Returns:

copy

public ReturnContext copy(Context newParent)

Description copied from class: Context

deep copy of the context, its status, and its children

Specified by:

copy in class Context

Parameters:

newParent - parent to attach the copied context too

Returns:

the copied context