Why not set the parameter values as follows:
This looks to me like a rather non-orthogonal design.
Why not have:
a1 = something
a3 = 0 or 1 or true or false (depending on semantics)
then calculate what you now call a2:
a2 = 2*a1 + a3
Edward
At 10:36 AM 2/15/2006, Kevin Ruland wrote:
Hi all,
We have a number of actors which require certain conditions to be
satisfied by attributes as a collection. For sake of example,
suppose we have two attributes a1, a2 which are integers. And the
following conditions must hold:
a1 = 1 <=> a2 = 1, 2
a1 = 2 <=> a2 = 3, 4
You get the idea.
Now suppose the user selects configure actor and sees:
a1: 1
a2: 2
And wants to configure the actor to be:
a1: 2
a2: 4
If I do all the validation in the attributeChanged method such as this:
public void attributeChanged(Attribute attribute) throws
IllegalActionException {
int a1val;
int a2val;
if ( attribute.equals(_a1) || attribute.equals(_a2) ) {
try {
a1val = Integer.parseInt( _a1.getExpression() );
a2val = Integer.parseInt( _a2.getExpression() );
} catch (NumberFormatException e ) {
throw new IllegalActionException("Invalid Number");
}
switch (a1val) {
case 1:
if ( a2val != 1 && a2val != 2 ) {
throw new IllegalActionException("invalid values");
}
break;
case 2:
if ( a2val != 3 && a2val != 4 ) {
throw new IllegalActionException("invalid values");
}
break;
default:
throw new IllegalActionException("invalid values");
}
}
super.attributeChanged(attribute);
}
With this code in place I was actually able to convince the actor to
move to the proper state but only by judiciously "ok"-ing the error
dialog. In fact, by abusing the error dialog I was even able to
move the actor into a completely invalid configuration.
Is there a better place to do this validation -- I'm hoping for
notification from the "commit" button instead of in
preinitialize/initialize. For this simple example, I could perhaps change the
Thanks for the help.
Kevin
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Edward A. Lee
Professor, Chair of the EE Division, Associate Chair of EECS
231 Cory Hall, UC Berkeley, Berkeley, CA 94720
phone: 510-642-0253 or 510-642-0455, fax: 510-642-2845
[EMAIL PROTECTED], http://ptolemy.eecs.berkeley.edu/~eal
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