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ptolemy.caltrop.ddi
Class CSP

java.lang.Object
 extended byptolemy.caltrop.ddi.AbstractDDI
 extended byptolemy.caltrop.ddi.CSP
All Implemented Interfaces:
DDI, Executable
public class CSP
extends AbstractDDI
implements DDI

Since:
Ptolemy II 4.0
Version:
$Id: CSP.java,v 1.35 2006年10月26日 21:44:06 cxh Exp $
Author:
Christopher Chang
Accepted Rating:
Red (cxh)
Proposed Rating:
Red (cxh)

Field Summary
Fields inherited from interface ptolemy.actor.Executable
COMPLETED, NOT_READY, STOP_ITERATING
Constructor Summary
CSP(TypedAtomicActor ptActor, caltrop.interpreter.ast.Actor actor, caltrop.interpreter.Context context, caltrop.interpreter.environment.Environment env)
Method Summary
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
isFireFunctional, isStrict, iterate, stop, stopFire, terminate, wrapup
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface ptolemy.actor.Executable
isFireFunctional, isStrict, iterate, stop, stopFire, terminate, wrapup

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.

Specified by:
isLegalActor in interface DDI
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.

Specified by:
setupActor in interface DDI

getName

public java.lang.String getName()
Description copied from interface: DDI
Get the name of the domain that this DDI implements.

Specified by:
getName in interface DDI
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.

Specified by:
fire in interface Executable
Throws:
IllegalActionException - If firing is not permitted.

initialize

public void initialize()
 throws IllegalActionException
Description copied from interface: Executable
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.

Specified by:
initialize in interface Executable
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.

Specified by:
postfire in interface Executable
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 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.

Specified by:
prefire in interface Executable
Returns:
True if the iteration can proceed.
Throws:
IllegalActionException - If prefiring is not permitted.

preinitialize

public void preinitialize()
 throws IllegalActionException
Description copied from interface: Executable
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.

Specified by:
preinitialize in interface Executable
Throws:
IllegalActionException - If initializing is not permitted.
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