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Set-accessor Body? [message #1850562]

Tue, 08 March 2022 14:16

Antonio Garmendia

Messages: 93
Registered: May 2014

Member

Hi all,

Currently, I am working with derived references. When I click on my derived reference in the genmodel, I can see in the properties view the text-field for the Get-accessor Body, so I can insert my code there.

However, I cannot see a Set-Accessor Body. I notice that the setter method is generated but of course, it is left empty. My problem is that I want to generate the genmodel from another application, set the bodies for the setter and getter, and then, generate the model code.

Is there a way to manage the setter the same way as the getter? Or should I create a setter EOperation?

Thanks in advance!

Kind regards,
Antonio

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Re: Set-accessor Body? [message #1850572 is a reply to message #1850562]

Tue, 08 March 2022 17:00

Ed Willink

Messages: 7669
Registered: July 2009

Senior Member

Hi

The regular way to specify Java bodies for EMF functionality is through an "http://www.eclipse.org/emf/2002/GenModel" EAnnotation, with "body", "get", "set" keys in the Ecore model.

I was not aware of the genmodel capability. It would seem that this friendly alternative has hidden the general solution from you.

The EMF Generator capability is powerful and extensible. You might find the approach taken by the OCL2Java code generator helpful. See the org.eclipse.ocl.examples.codegen plugin. The OCL Generator registers a pre and post generator. The pre-generator synthesizes the required Java code from OCL EAnnotations and embeds it as Java EAnnotations that are the used by the regular generator. The post generator undoes the changes in case anyone else is interested in the resulting models. This approach avoids cluttering the *.ecore model.

Regards

Ed Willink

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Re: Set-accessor Body? [message #1850597 is a reply to message #1850572]

Wed, 09 March 2022 14:05

Antonio Garmendia

Messages: 93
Registered: May 2014

Member

Hi Ed,

Thanks for your prompt reply.

Indeed, this feature in GenModel exists and in our case, it is very useful.

We tried your approach but it does not seem to work for the "set" case. It only recognizes the key "get".

Find attached the screenshot (set-example.png) of the minimal example that we are testing. What are we missing?

Thanks for your help.

Kind regards,
Antonio

Attachment: set-example.png
(Size: 63.25KB, Downloaded 133 times)

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Re: Set-accessor Body? [message #1850605 is a reply to message #1850597]

Wed, 09 March 2022 17:49

Ed Willink

Messages: 7669
Registered: July 2009

Senior Member

Hi

The relevant line in Class.javaJet looks to be
<%=setAccessorOperation.getBody(genModel.getIndentation(stringBuffer))%>
so you probably should use "body" rather than "set".

Regards

Ed Willink

[Updated on: Wed, 09 March 2022 19:35]

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Re: Set-accessor Body? [message #1850608 is a reply to message #1850605]

Wed, 09 March 2022 20:12

Ed Merks

Messages: 33210
Registered: July 2009

Senior Member

Note that originally I'm seeing advice for annotations for a feature but now I'm seeing advice for annotations for an operation. For features only org.eclipse.emf.codegen.ecore.genmodel.GenFeature.getGetterBody(String) is supported so yes, you'd need to use an operation if you want to override set's behavior.

Ed Merks
Professional Support: https://www.macromodeling.com/

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Re: Set-accessor Body? [message #1850617 is a reply to message #1850608]

Thu, 10 March 2022 10:40

Antonio Garmendia

Messages: 93
Registered: May 2014

Member

Hi,

Thank you both for your answers.

Indeed, I will implement the set EOperation and in the derived feature, the Changeable property must equal to false.

Kind regards,
Antonio

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