[kepler-dev] Cloning errors in Kepler with PT CVS

Dan Higgins higgins at nceas.ucsb.edu
Sat Apr 23 13:38:45 PDT 2005

Hi All,
    Well, I thought we had eliminated all the actors which 'hide' ports 
by setting their container to 'null' but 2 more have appeared! Namely
'org.srb.SRBProxyCommand' and

I think these actors were created by Efrat. If so and you want them to 
appear in the actor tree, could you fix the code, Efrat?

As pointed out by Edward,

"Note that it is still incorrect to have code like:

  private Port _myPort;

  _myPort = new TypedIOPort(this, "name");

  code that uses _myPort

In particular, if you now clone this actor, the clone
will have a reference to the port in the original actor.
One port, two actors... Chaos...

The right way to hide a port is to create a parameter
(ptolemy.data.expr.SingleParameter) called "_hide" with
value "true" in the port.

so we should all avoid setting the port container to 'null' in future 
work to hide actors.

Dan Higgins

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