Examples of ptolemy.actor.Director

ptolemy.actor.Director
A Director governs the execution within a CompositeActor. A composite actor that contains a director is said to be opaque, and the execution model within the composite actor is determined by the contained director. This director is called the local director of a composite actor. A composite actor is also aware of the director of its container, which is referred to as its executive director. A director may also be contained by a CompositeEntity that is not a CompositeActor, in which case it acts like any other entity within that composite.
A top-level composite actor is generally associated with a manager as well as a local director. The Manager has overall responsibility for executing the application, and is often associated with a GUI. Top-level composite actors have no executive director and getExecutiveDirector() will return null.
A local director is responsible for invoking the actors contained by the composite. If there is no local director, then the executive director is given the responsibility. The getDirector() method of CompositeActor, therefore, returns the local director, if there is one, and otherwise returns the executive director. Thus, it returns whichever director is responsible for executing the contained actors, or null if there is none. Whatever it returns is called simply the director (vs. local director or executive director).
A director implements the action methods (preinitialize(), initialize(), prefire(), fire(), postfire(), iterate(), and wrapup()). In this base class, default implementations are provided that may or may not be useful in specific domains. In general, these methods will perform domain-dependent actions, and then call the respective methods in all contained actors.
The director also provides methods to optimize the iteration portion of an execution. This is done by setting the workspace to be read-only during an iteration. In this base class, the default implementation results in a read/write workspace. Derived classes (e.g. domain specific directors) should override the _writeAccessRequired() method to report that write access is not required. If none of the directors in a simulation require write access, then it is safe to set the workspace to be read-only, which will result in faster execution.
This class also specifies a parameter timeResolution. This is a double with default 1E-10, which is 10^-10. All time values are rounded to the nearest multiple of this value. If the value is changed during a run, an exception is thrown. This is a shared parameter, which means that all instances of Director in the model will have the same value for this parameter. Changing one of them changes all of them.
The timeResolution parameter is not visible to the user by default. Subclasses can make it visible by calling
```
 timeResolution.setVisibility(Settable.FULL); 
```
in their constructors. @author Mudit Goel, Edward A. Lee, Lukito Muliadi, Steve Neuendorffer, John Reekie @version $Id: Director.java,v 1.266 2007/12/07 06:25:19 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Yellow (neuendor)

        Actor container = (Actor) getContainer();
        while (viewScreen == null) {
            // Tolerate GR nested within GR, in which case
            // the view screen should be that of the enclosing composite.
            // There could be an intervening FSMDirector, etc.
            Director executiveDirector = container.getExecutiveDirector();
            if (executiveDirector instanceof GRDirector) {
                viewScreen = ((GRDirector)executiveDirector)._getViewScreen();
            } else {
                if (executiveDirector == null) {
                    throw new IllegalActionException(this,

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                        1));
            }


            if (actor instanceof CompositeActor) {
                CompositeActor compositeActor = (CompositeActor) actor;
                Director insideDirector = compositeActor.getDirector();
                // FIXME: This is bogus.  This is assuming there is no
                // more than one inside director, and is delegating the
                // incrementing of time to that inside director.
                _insideDirector = insideDirector;
                _pseudoTimeEnabled = true;

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                break;
            }
        }


        // Go through hierarchy to find the minimum step.
        Director executiveDirector = ((CompositeActor) getContainer())
                .getExecutiveDirector();
        if (executiveDirector != null) {
            Time aFutureTimeOfUpperLevel = executiveDirector
                    .getModelNextIterationTime();
            if (aFutureTime.compareTo(aFutureTimeOfUpperLevel) > 0) {
                aFutureTime = aFutureTimeOfUpperLevel;
            }
        }

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            // Change the color of the icon to red.
            _circle.fillColor.setToken("{1.0, 0.0, 0.1, 0.7}");


            // Request refiring one second later to change
            // the icon back to blue.
            Director director = getDirector();
            director.fireAt(this, director.getModelTime().add(1.0));
        } else {
            // Set color to blue.
            _circle.fillColor.setToken("{0.0, 0.0, 1.0, 0.05}");
        }

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     *  while transferring outputs
     */
    protected synchronized void _transferOutputs()
            throws IllegalActionException {
        // Use the executive director to transfer outputs.
        Director executiveDirector = getExecutiveDirector();


        if (executiveDirector != null) {
            Iterator outports = outputPortList().iterator();


            while (outports.hasNext()) {
                IOPort p = (IOPort) outports.next();
                executiveDirector.transferOutputs(p);
            }
        }
    }

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        NamedObj container = getContainer();
        // NOTE: the container may not be a composite actor.
        // For example, the container may be an entity as a library,
        // where the director is already at the top level.
        if (container instanceof CompositeActor) {
            Director executiveDirector = ((CompositeActor) container)
                    .getExecutiveDirector();
            if (executiveDirector != null) {
                return executiveDirector.getModelNextIterationTime();
            }
        }
        return Time.POSITIVE_INFINITY;
    }

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        // is embedded in a DE model but has no input ports, without the
        // following statements, the composite actor has no chance to be fired.


        if (_isEmbedded() && (_enclosingContinuousDirector() == null)) {
            Actor container = (Actor) getContainer();
            Director director = container.getExecutiveDirector();
            director.fireAt(container, _startTime);
        }
        // Set a breakpoint with index 0 for the stop time.
        // Note that do not use fireAt because that will set index to 1,
        // which may produce more than one output at the stop time.
        _breakpoints.insert(new SuperdenseTime(_stopTime, 0));

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            // Update the cache.
            _enclosingContinuousDirector = null;
            NamedObj container = getContainer().getContainer();
            while (container != null) {
                if (container instanceof Actor) {
                    Director director = ((Actor) container).getDirector();
                    if (director instanceof ContinuousDirector) {
                        _enclosingContinuousDirector = (ContinuousDirector) director;
                        break;
                    }
                    if (!(director instanceof QuasiTransparentDirector)) {

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        postfireResult = _commit() && postfireResult;
        // request a refiring at a future time,
        // the current time + suggested step size
        if (_currentStepSize == 0) {
            Actor container = (Actor) getContainer();
            Director enclosingDirector = container.getExecutiveDirector();
            enclosingDirector.fireAt(container, _currentTime);
        }


        return postfireResult;
    }

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     *  is not an instance of this same class.
     *  @return True if it is OK to fire again.
     */
    private boolean _postfireWithEnclosingNonContinuousDirector()
            throws IllegalActionException {
        Director enclosingDirector = ((Actor) getContainer())
                .getExecutiveDirector();
        int comparison = _currentTime.compareTo(enclosingDirector
                .getModelTime());
        if (comparison > 0) {
            // We have to defer the commit until current time of the environment
            // matches our local current time. Call fireAt() to ensure that the
            // enclosing director invokes prefire at the local current time.
            // This local current time should not exceed the least time on
            // the breakpoint table.
            enclosingDirector.fireAt((Actor) getContainer(), _currentTime);
            _commitIsPending = true;
            return true;
        } else {
            // NOTE: It is, in theory, impossible for local current time to
            // be less than the environment time because the prefire() method
            // would have thrown an exception. Hence, current time must match
            // the environment time.
            _commitIsPending = false;


            // Request a refiring at the current time.
            // The reason for this is that local time has not advanced,
            // so we can't be sure of any interval of future time over which
            // we will not produce an event. Only when the step size is
            // greater than zero, as we have speculatively executed into
            // the future, can we allow the enclosing director to advance time.
            enclosingDirector.fireAt((Actor) getContainer(), _currentTime);


            return _commit();
        }
    }

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