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Change behavior without modifying generated code [message #1803311]

Tue, 26 February 2019 16:02

Wilbert Alberts

Messages: 209
Registered: June 2010

Senior Member

Hi,

I would like to modify the behavior of the label provider without changing the generated code.

(The general idea is deescribed here: https://nirmalsasidharan.wordpress.com/2011/05/18/extending-emf-itemproviders-using-google-guice-i/ but then without the guice.)

I thought I could do that by extending the corresponding generated ItemProviders. For my ItemProviders to be used, I also had to extend the generated ItemProviderAdapterFactory. In order for that one to be used I had to modify the plugin.xml of the edit plugin. It registers the generated AdapterFactory and I changed that into MyAdapterFactory.

However, the emf generator generates a new extension each time I changed it into my AdapterFactory.

Is there a way to suppress generation of the extension in the plugin.xml by the emf generator? Or is there a better way to modify the behavior of the label providers without changing any generated code?

Greetings,
Wilbert.

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Re: Change behavior without modifying generated code [message #1803330 is a reply to message #1803311]

Wed, 27 February 2019 01:17

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

Have you tried changing the marker in the plugin.xml? Also, if you disable Update Classpath in the GenModel, you can maintain the file manually.

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

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Re: Change behavior without modifying generated code [message #1803342 is a reply to message #1803330]

Wed, 27 February 2019 07:42

Wilbert Alberts

Messages: 209
Registered: June 2010

Senior Member

Hi Ed,

Plugin.xml indeed contains a line like:

      <!-- @generated Ddf -->

Changing that into  results in adding an additional extension. (So then I have two itemProviderAdapterFactories extensions.) As far as I could tell, I could not force the generated editor to prefer mine over the default generated one.

Assuming that the 'update classpath' option is found below 'Templates & Merge' I could not determine any change in behavior. In other words, the plugin .xml gets overwritten regardless whether it is true or false.

Did I trigger some bugs here for which I should file a bug report? FYI, I have been using the windows version of eclipse:

Eclipse Modeling Tools
Version: Photon Release (4.8.0)
Build id: 20180619-1200

with:

EMF Code Generation
Version: 2.13.0.v20180319-0813
Build: 201805310718

Greetings,
Wilbert

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Re: Change behavior without modifying generated code [message #1803365 is a reply to message #1803342]

Wed, 27 February 2019 12:16

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

I haven't tried it (I'm on vacation) but I believe if you comment out the default generated registration in the plugin.xml (deleting the @generated marker because  can't nest), it will not generate an additional one and you can then register a different one.

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

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