[kepler-users] using undefined input port

[José Román Bilbao Castro]

Hi again,

I read and followed the instructions on the link you sent me... but no  
way. First, I can not
find an actor which makes "conditional expressions". Second, the  
attached workflow does
almost what I want: When a value is set for the port, it is detected  
and also is detected a
missing value. The thing is that I would like to modify the outputs.  
Instead of printing a
single constant string I would like to do this:

a) If true (if input is present): print a string consisting of a  
string plus the value of the input.
b) if false, print an empty string. This is ok as I just need to  
change the current value to an
empty string.

Can you please have a look at it?.

Thanks in advance,

Jose.
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El 26/01/2009, a las 18:41, Matt Jones escribi?:

> Dear Jose,
>
> The Boolean Multiplexor needs to have data on all ports to work, which
> is probably why yours is not working.  The documentation for that
> actor says:
>
> "The actor must receive tokens on all ports. Each time the actor
> fires, it reads one token from each of its input ports and outputs the
> selected token."
>
> There is a short article on how to do conditional execution in the
> September 2008 newsletter:
>
> Conditional Routing and Execution in Kepler
> https://dev.kepler-project.org/users/newsletter/2008-09-kepler- 
> news.pdf
>
> You should be able to do what you want following those examples,
> although note that BooleanSwitch won't work with the SDF director.
> You'll need to choose another, like possibly the DDF director.
>
> Matt
>
> 2009/1/26 Jos? Rom?n Bilbao Castro <jrbcast at gmail.com>:
>> Hi all,
>>
>> I want to do this:
>>
>> My workflow accepts an input port. Within the workflow I can do two
>> different things:
>>
>> a) If the input parameter has a value do something
>> b) else if the input parameter has nothing (i.e. is not connected),  
>> do
>> something.
>>
>> I have been trying to use boolean expressions (IsPresent) and a  
>> logical
>> multiplexor
>> but when the input port is not connected I get an error I can not  
>> solve.
>>
>> Please find attached the workflow, try to remove the external input  
>> port
>> parameter to
>> see the problem
>>
>> Cheers,
>>
>> Jose.
>>
>>
>>
>>
>> ===============================
>> Jos? Rom?n Bilbao Castro, PhD
>> Dept. Arquitectura de Computadores y Electr?nica
>> Edif. CITE III.
>> Universidad de Almer?a
>> La Ca?ada de San Urbano, 04120
>> Almer?a (Spain)
>> jrbcast at gmail.com
>> ===============================
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> Kepler-users mailing list
>> Kepler-users at kepler-project.org
>> http://mercury.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-users
>>
>>
>
>
>
> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Matthew B. Jones
> Director of Informatics Research and Development
> National Center for Ecological Analysis and Synthesis (NCEAS)
> UC Santa Barbara
> jones at nceas.ucsb.edu                       Ph: 1-907-523-1960
> http://www.nceas.ucsb.edu/ecoinfo
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

===============================
Jos? Rom?n Bilbao Castro, PhD		
Dept. Arquitectura de Computadores y Electr?nica
Edif. CITE III.
Universidad de Almer?a
La Ca?ada de San Urbano, 04120
Almer?a (Spain)
jrbcast at gmail.com
===============================