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Invoking java services on a double click action [message #1861316]

Thu, 05 October 2023 08:44

Leonard Theisler

Messages: 16
Registered: September 2023

Junior Member

Hi,

I am trying to take the xmi file that is generated when graphically editing the model and to convert it to an xml and save it. I have a method that does this accurately (made for another project, tested fine). However, I am having an issue with calling this method. I understand that it needs to be in a java service, and I have made a double click action in order to call the method. However, it seems that the method is not called when I double click on the mapped element. I am not sure what is wrong, I have tried a bunch of different aql expressions to call the method. Also, I am not entirely sure where to call the java service, should it be in a "change context" under the double click tool or should it be somewhere else? I have uploaded a few screenshots to show you what I have at the moment. Does anyone know what I am doing wrong?

Thanks for the help

Attachment: serviceMethod.png
(Size: 22.63KB, Downloaded 53 times)
Attachment: doubleClick.png
(Size: 11.89KB, Downloaded 60 times)

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Re: Invoking java services on a double click action [message #1861439 is a reply to message #1861316]

Thu, 12 October 2023 13:09

Pierre-Charles David

Messages: 705
Registered: July 2009

Senior Member

Hi.

It looks like a syntax error in the expression ("service.myService").

It should be either "service:myService" or "aql:self.myService()"

"aql:" uses the plain AQL interpreter, which is the prefered approach. It's more flexible/powerful and reasonably fast (small overhead) for such simple cases.

"service:" delegates to a special purpose interpreter which is very fast but also very limited and can only invoke Java services (no complex expressions). It should only be used on expressions which are invoked a lot (e.g. label expressions invoked for many nodes on every refresh) and then only if you see performance issues when using AQL (very rare in practice).

Pierre-Charles David - Obeo

Need training or professional services for Sirius?
http://www.obeodesigner.com/sirius

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