/**
* Returns <code>null</code> as a Tree EditPart holds no children under it.
*
* @return <code>null</code>
*/
protected List getModelChildren() {
NamedObj namedObjectModel = getNamedObjectModel();
List children = new ArrayList();
if (namedObjectModel instanceof AtomicActor) {
AtomicActor actor = (AtomicActor) namedObjectModel;
children.addAll(actor.attributeList(Parameter.class));
children.addAll(actor.inputPortList());
children.addAll(actor.outputPortList());
} else if (namedObjectModel instanceof CompositeActor) {
CompositeActor composite = (CompositeActor) namedObjectModel;
children.addAll(composite.attributeList(AtomicActor.class));
children.addAll(composite.attributeList(Parameter.class));
children.addAll(composite.inputPortList());
Enumeration enumeration = composite.getEntities();
while (enumeration.hasMoreElements()) {
children.add(enumeration.nextElement());
}
} else if (namedObjectModel instanceof IOPort) {
IOPort text = (IOPort) namedObjectModel;
children.addAll(text.attributeList(ptolemy.kernel.util.StringAttribute.class));
} else if (namedObjectModel instanceof Vertex) {
Vertex text = (Vertex) namedObjectModel;
children.addAll(text.attributeList(Vertex.class));
} else if (namedObjectModel instanceof TextAttribute) {
TextAttribute text = (TextAttribute) namedObjectModel;
children.addAll(text.attributeList(ptolemy.kernel.util.StringAttribute.class));
} else if (namedObjectModel instanceof Director) {
Director director = (Director) namedObjectModel;
children.addAll(director.attributeList(Parameter.class));
}
return children;
}
/**
* Transform the graphic block diagram to text expression. Assume container only contains atomic
* actors.
*
* @param container contains actors.
* @return txtExpression of graphic block diagram.
*/
private String _graphToText(CompositeActor container) throws IllegalActionException {
// It is not trivial to transform graph to text.
// Here, we assume there is only one Integrator and one expression actor.
String txtString = "";
LinkedList actors = new LinkedList(container.entityList());
ListIterator actorIterator = actors.listIterator();
// we begin with Integrator.
AtomicActor beginActor = new AtomicActor();
while (actorIterator.hasNext()) {
Actor actor = (Actor) actorIterator.next();
if (Integrator.class.isInstance(actor)) {
beginActor = (AtomicActor) actor;
break;
}
}
if (beginActor == null) {
throw new IllegalActionException("Integrator is needed!");
} else {
// we trace the output of the Integrator
// we assume the output of the integrator is connectted
// to the container output directly and they have same names
// for simplicity at this time.
// FIXME: we really need to reconsider the methods of ports.
List outputs = beginActor.outputPortList();
ListIterator outputIterator = outputs.listIterator();
String outputName = "";
if (outputs.size() != 1) {
throw new IllegalActionException("Integrator only have one output! " + outputs.size());
} else {
TypedIOPort output = (TypedIOPort) outputIterator.next();
ListIterator sinkIterator = output.connectedPortList().listIterator();
while (sinkIterator.hasNext()) {
TypedIOPort sink = (TypedIOPort) sinkIterator.next();
if (sink.isOutput()) {
// FIXME: we need to consider depth in hierarchy
// to avoid two outputs connected to same output
// of composite actor
outputName = sink.getName();
}
}
txtString += ("diff { d(" + outputName + ") == ");
}
// we trace the input of the integrator
List inputs = beginActor.inputPortList();
ListIterator inputIterator = inputs.listIterator();
if (inputs.size() != 1) {
throw new IllegalActionException("Integrator only have one input!");
} else {
TypedIOPort input = (TypedIOPort) inputIterator.next();
List sources = input.connectedPortList();
if (sources.size() != 1) {
throw new IllegalActionException("There is only one connection to the input!");
} else {
TypedIOPort source = (TypedIOPort) sources.get(0);
// if there is just an integrator
if (source.isInput()) {
txtString += (source.getName() + " ; }" + _endLine);
}
// if there is some expression actor
else {
AtomicActor expressionActor = (AtomicActor) source.getContainer();
if (Expression.class.isInstance(expressionActor)) {
Parameter expPara = (Parameter) expressionActor.getAttribute("expression");
txtString += (expPara.getExpression() + " ; } " + _endLine);
} else {
throw new IllegalActionException("This should be Expression Atomic Actor!");
}
}
}
}
}
return txtString;
}