ptolemy.caltrop.ddi

Class CSP

java.lang.Object

ptolemy.caltrop.ddi.AbstractDDI

ptolemy.caltrop.ddi.CSP

All Implemented Interfaces:

Executable, Initializable, DDI

public class CSP
extends AbstractDDI

Since:

Ptolemy II 4.0

Version:

$Id$

Author:

Christopher Chang

Pt.AcceptedRating:

Red (cxh)

Pt.ProposedRating:

Red (cxh)

Field Summary

Fields inherited from interface ptolemy.actor.Executable

COMPLETED, NOT_READY, STOP_ITERATING

Constructor Summary

Constructors

Constructor and Description
CSP(TypedAtomicActor ptActor, caltrop.interpreter.ast.Actor actor, caltrop.interpreter.Context context, caltrop.interpreter.environment.Environment env)

Method Summary

Modifier and Type	Method and Description
void	fire() Fire the actor.
java.lang.String	getName() Get the name of the domain that this DDI implements.
void	initialize() Begin execution of the actor.
boolean	isLegalActor() Perform static checking on the actor, ensuring its validity in a given domain.
boolean	postfire() This method should be invoked once per iteration, after the last invocation of fire() in that iteration.
boolean	prefire() This method should be invoked prior to each invocation of fire().
void	preinitialize() This method should be invoked exactly once per execution of a model, before any of these other methods are invoked.
void	setupActor() Perform any domain dependent setup.

Methods inherited from class ptolemy.caltrop.ddi.AbstractDDI

addInitializable, isFireFunctional, isStrict, iterate, removeInitializable, stop, stopFire, terminate, wrapup

Methods inherited from class java.lang.Object

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

Constructor Detail

CSP

public CSP(TypedAtomicActor ptActor,
           caltrop.interpreter.ast.Actor actor,
           caltrop.interpreter.Context context,
           caltrop.interpreter.environment.Environment env)

Method Detail

isLegalActor

public boolean isLegalActor()

Description copied from interface: DDI

Perform static checking on the actor, ensuring its validity in a given domain.

Returns:

True, if the actor is legal.

setupActor

public void setupActor()

Description copied from interface: DDI

Perform any domain dependent setup. This can include hanging various attributes off of the actor, for example, the rate of the input and output ports.

getName

public java.lang.String getName()

Description copied from interface: DDI

Get the name of the domain that this DDI implements.

Returns:

The name of the domain that this DDI implements.

fire

public void fire()
          throws IllegalActionException

Description copied from interface: Executable

Fire the actor. This may be invoked several times between invocations of prefire() and postfire(). Output data may (and normally will) be produced. Typically, the fire() method performs the computation associated with an actor. This method is not required to have bounded execution. However, after endFire() is called, this method should return in bounded time.

Throws:

IllegalActionException - If firing is not permitted.

initialize

public void initialize()
                throws IllegalActionException

Description copied from interface: Initializable

Begin execution of the actor. This is invoked exactly once after the preinitialization phase. Since type resolution is done in the preinitialization phase, along with topology changes that may be requested by higher-order function actors, an actor can produce output data and schedule events in the initialize() method.

Throws:

IllegalActionException - If execution is not permitted.

postfire

public boolean postfire()
                 throws IllegalActionException

Description copied from interface: Executable

This method should be invoked once per iteration, after the last invocation of fire() in that iteration. The postfire() method should not produce output data on output ports of the actor. It returns true if the execution can proceed into the next iteration, false if the actor does not wish to be fired again. This method typically wraps up an iteration, which may involve updating local state or updating displays.

Returns:

True if the execution can continue.

Throws:

IllegalActionException - If postfiring is not permitted.

prefire

public boolean prefire()
                throws IllegalActionException

Description copied from interface: Executable

This method should be invoked prior to each invocation of fire(). It returns true if the fire() method can be invoked, given the current status of the inputs and parameters of the actor. Thus this method will typically check preconditions for a firing, if there are any. In an opaque, non-atomic entity, it may move data into an inner subsystem.

Returns:

True if the iteration can proceed.

Throws:

IllegalActionException - If prefiring is not permitted.

preinitialize

public void preinitialize()
                   throws IllegalActionException

Description copied from interface: Initializable

This method should be invoked exactly once per execution of a model, before any of these other methods are invoked. For actors, this is invoked prior to type resolution and may trigger changes in the topology, changes in the type constraints.

Throws:

IllegalActionException - If initializing is not permitted.