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Change behavior without modifying generated code [message #1803311] Tue, 26 February 2019 11:02 Go to next message
Eclipse UserFriend
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.
Re: Change behavior without modifying generated code [message #1803330 is a reply to message #1803311] Tue, 26 February 2019 20:17 Go to previous messageGo to next message
Eclipse UserFriend
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.
Re: Change behavior without modifying generated code [message #1803342 is a reply to message #1803330] Wed, 27 February 2019 02:42 Go to previous messageGo to next message
Eclipse UserFriend
Hi Ed,

Plugin.xml indeed contains a line like:
      <!-- @generated Ddf -->


Changing that into <!-- @generated Ddf NOT--> 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
Re: Change behavior without modifying generated code [message #1803365 is a reply to message #1803342] Wed, 27 February 2019 07:16 Go to previous messageGo to next message
Eclipse UserFriend
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.
Re: Change behavior without modifying generated code [message #1803383 is a reply to message #1803365] Wed, 27 February 2019 10:50 Go to previous message
Eclipse UserFriend
Hi Ed,

Brilliant!

That works. Thanks and enjoy your vacation!

Greetings,
Wilbert.
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