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Replace/Override EFactory [message #421079]

Wed, 23 July 2008 15:46

Eclipse User

Originally posted by: swt.magellium.fr

Hello all !

I'd like to override the "create(EClass)" method of EFactoryImpl.
Is there a simple way to achieve that ?

For instance, I'd like to create my own EFactoryImpl class (subclass of
emf's EFactoryImpl) and to get all Factories to extend this class
instead of emf's EFactoryImpl when generating model code...

Thanks a lot in advance !
Stephane

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Re: Replace/Override EFactory [message #421080 is a reply to message #421079]

Wed, 23 July 2008 17:07

Eclipse User

Originally posted by: swt.magellium.fr

I found that the "create(EClass)" method of EFactoryImpl seems to be
used only for dynamic EObjects, and that each subclasses (package
factories) redefines this "create" method in order to create non-dynamic
objects (I think there is a way to always create dynamic objects, but I
don't want dynamic objects...)
What I'd really like to do is to have a piece of code executed whenever
a model object is created...

SWT wrote :
> Hello all !
>
> I'd like to override the "create(EClass)" method of EFactoryImpl.
> Is there a simple way to achieve that ?
>
> For instance, I'd like to create my own EFactoryImpl class (subclass of
> emf's EFactoryImpl) and to get all Factories to extend this class
> instead of emf's EFactoryImpl when generating model code...
>
> Thanks a lot in advance !
> Stephane

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Re: Replace/Override EFactory [message #421086 is a reply to message #421080]

Wed, 23 July 2008 17:32

Eike Stepper

Messages: 6682
Registered: July 2009

Senior Member

Stephane,

There's no generic way to modify the behaviour of generated factories at
runtime. See Ed's famous metapher of the "poisoned fountain":
http://dev.eclipse.org/newslists/news.eclipse.tools.emf/msg0 5672.html

Of course you can handcraft all aspects of your own generated code,
including the factory interfaces and implementation classes: add
methods, change bodies, etc.. Just mark the changed methods "@generated
NOT". IIRC you can also change the super class and preserve this change
by adding an @extends JavaDoc comment. See
http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.emf/org .eclipse.emf.cdo/plugins/org.eclipse.emf.cdo/src/org/eclipse /emf/cdo/eresource/CDOResource.java?root=Modeling_Project&am p;view=co
for an example.

Cheers
/Eike

SWT schrieb:
> I found that the "create(EClass)" method of EFactoryImpl seems to be
> used only for dynamic EObjects, and that each subclasses (package
> factories) redefines this "create" method in order to create
> non-dynamic objects (I think there is a way to always create dynamic
> objects, but I don't want dynamic objects...)
> What I'd really like to do is to have a piece of code executed
> whenever a model object is created...
>
> SWT wrote :
>> Hello all !
>>
>> I'd like to override the "create(EClass)" method of EFactoryImpl.
>> Is there a simple way to achieve that ?
>>
>> For instance, I'd like to create my own EFactoryImpl class (subclass
>> of emf's EFactoryImpl) and to get all Factories to extend this class
>> instead of emf's EFactoryImpl when generating model code...
>>
>> Thanks a lot in advance !
>> Stephane

Cheers
/Eike

----
http://www.esc-net.de
http://thegordian.blogspot.com
http://twitter.com/eikestepper

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