Christopher,
Thanks for quick reply !
So,
What is the difference of doing between setContainer &
setName and calling constructor with container and
name arguments?
Is it setting internal Actor information missing in
first way? For example, in the following PoissonClock
actor code, I will miss the internal state setting,
(meanTime,values, output class members).
If I would put this constructor into another method
with only name parameter, say PoissonClockCreate,
without "super (container,name)" line
then call it like this, still can't I achieve same
effect?:
p = new PoissonClock()
p.setName(name)
p.setContainer(container)
p.PoissonClockCreater(name);
public void PoissonClockCreate(String name)
throws NameDuplicationException,
IllegalActionException {
//Skip this
//super (container,name);
//The rest will be same as original constructor
....
}
public PoissonClock(CompositeEntity container, String
name)
throws NameDuplicationException,
IllegalActionException {
super(container, name);
meanTime = new Parameter(this, "meanTime");
meanTime.setExpression("1.0");
meanTime.setTypeEquals(BaseType.DOUBLE);
// Set the values parameter
values = new Parameter(this, "values");
values.setExpression("{1, 0}");
values.setTypeEquals(new
ArrayType(BaseType.UNKNOWN));
// set type constraint
ArrayType valuesArrayType = (ArrayType)
values.getType();
InequalityTerm elementTerm =
valuesArrayType.getElementTypeTerm();
output.setTypeAtLeast(elementTerm);
// Call this so that we don't have to copy its
code here...
attributeChanged(values);
fireAtStart = new Parameter(this,
"fireAtStart");
fireAtStart.setExpression("true");
fireAtStart.setTypeEquals(BaseType.BOOLEAN);
}
--- Christopher Brooks <[EMAIL PROTECTED]> wrote:
> Constructing the CompositeActor/Actor/Director and
> then
> setting the name and container are not semantically
> the same if
> the constructor uses the name and container. One
> can get
> around this by being crafty, but that's not what
> what we did.
>
> I think there is pretty good argument to be made for
> doing very little
> in the constructor. We've had problems several
> times because we
> were doing too much in the constructor
>
> BTW There is some Ptolemy Corba code in the devel
> tree at
> ptII/ptolemy/actor/corba/
> This code has never been released in a formal
> Ptolemy release.
>
> See http://chess.eecs.berkeley.edu/ptexternal
> for how to access the devel tree via CVS
>
> _Christopher
> --------
>
> Hi:
>
> I am working on a Distributed Ptolemy through
> CORBA/EJB/Web Services,
>
> I am learning the Ptolemy code. I like its
> software
> architecture, that is good to me.
>
> I have a question. When we run a model with
> PtExecuteApplication provided with XML source of
> model, Ptolemy internally calls the constructor
> like
> this:
>
> public CompositeActor/Actor/Director
> (CompositeEntity
> container, String name)
>
> Here I have a question. If I would instantiate
> the
> constructor with empty argument like this:
>
> public CompositeActor()
>
> and call setContainer and setName on the result
> object:
>
> I mean:
>
> Current way:
>
> p = new Actor/CompositeActor/Director
> (container,
> name)
>
> Instead of this, this will be equal to above
> semantically:
>
> p = new Actor/CompositeActor/Director ();
> p.setContainer (container)
> p.setName(name)
>
> Thanks
>
> Best Regards
>
> Erol Akarsu
>
> public CompositeActor(Workspace workspace)
>
>
>
> public CompositeActor (CompositeEntity
> container,
> String name)
>
>
>
>
>
> __________________________________
> Yahoo! Mail - PC Magazine Editors' Choice 2005
> http://mail.yahoo.com
>
>
>
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