[kepler-dev] NIL token

[Jing Tao]

Hi, Christopher:

The test workflow is alreay in 
kepler/workflows/test/test-eml-missing-value-field.xml. You may run it and 
to see what will happen. The stack trace is:

ptolemy.kernel.util.IllegalActionException: Run-time type checking failed. 
Token nil with type general is incompatible with port type: double
   in .test-eml-missing-value-field.Missing Value.Column2
 	at ptolemy.actor.TypedIOPort._checkType(TypedIOPort.java:741)
 	at ptolemy.actor.TypedIOPort.send(TypedIOPort.java:463)
 	at 
org.ecoinformatics.seek.datasource.eml.eml2.Eml200OutputTypeField.fire(Eml200OutputTypeField.java:103)
 	at 
org.ecoinformatics.seek.datasource.eml.eml2.Eml200DataSource.fire(Eml200DataSource.java:552)
 	at ptolemy.actor.AtomicActor.iterate(AtomicActor.java:309)
 	at 
ptolemy.actor.sched.StaticSchedulingDirector.fire(StaticSchedulingDirector.java:170)
 	at ptolemy.actor.CompositeActor.fire(CompositeActor.java:331)
 	at ptolemy.actor.Manager.iterate(Manager.java:613)
 	at ptolemy.actor.Manager.execute(Manager.java:322)
 	at ptolemy.actor.Manager.run(Manager.java:985)
 	at ptolemy.actor.Manager$3.run(Manager.java:1026)


Thanks,

Jing

Jing Tao
National Center for Ecological
Analysis and Synthesis (NCEAS)
735 State St. Suite 204
Santa Barbara, CA 93101

On Wed, 29 Mar 2006, Christopher Brooks wrote:

> Date: Wed, 29 Mar 2006 11:04:25 -0800
> From: Christopher Brooks <cxh at eecs.berkeley.edu>
> To: Jing Tao <tao at nceas.ucsb.edu>
> Cc: kepler-dev at ecoinformatics.org
> Subject: Re: [kepler-dev] NIL token
> 
> Hi Jing,
>
> Good question, I was afraid there might be issues surrounding
> Nil tokens and types.  My previous design had nil-ness being a
> property of the token, so we had a DoubleToken that was of
> type double and was nil.  Now we have just one token which is nil.
>
> Can you construct a small model that has a similar failure?
>
> Also, what's the stack trace of the current failure?
> Perhaps where the types are being checked needs to be updated to
> handle nilness
>
> _Christopher
>
> --------
>
>    hi, Christopher:
>
>    According to the changes you made in ptolemy about nil token, I made the
>    changes in kepler for missing value too.
>
>    Since currently we only have one public static variable NIL in Token class
>    (NIL is a generic type and there is no any other nil in sub token
>    classes), I think every missing value element should be replaced by the
>    NIL token no matter what the data type it is. But when I run the workflow
>    test, I got some error:
>
>    Workflow workflows/test/test-ecogrid-eml-gce-data.xml FAILED:
>    [java] ptolemy.kernel.util.IllegalActionException: Run-time type checking
>    failed. Token nil with type general is
>    incompatible with port type: int
>
>    So it seems the NIL token is not compatible to int port type. Did I miss
>    something? How can I make the NIL token to compatible int port type?
>
>    Thanks,
>
>    Jing
>
>    Jing Tao
>    National Center for Ecological
>    Analysis and Synthesis (NCEAS)
>    735 State St. Suite 204
>    Santa Barbara, CA 93101
>    _______________________________________________
>    Kepler-dev mailing list
>    Kepler-dev at ecoinformatics.org
>    http://mercury.nceas.ucsb.edu/ecoinformatics/mailman/listinfo/kepler-dev
> --------
>
>