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[Xtend]: definition of recursive extensions [message #552249]

Wed, 11 August 2010 08:47

Eclipse User

Hello

I have an error on my ext file:
Couldn't find extension : getWebApp(c.eContainer)

I think it's related to:

DataTable getDataTable(Column col):
getDataTable(col.eContainer);
DataTable getDataTable(DataTable d):
d;
DataTable getDataTable(EObject e):
null;

I have also proble with the extend editor: it doesn't underline the wright line with the error.

Thanks

Re: [Xtend]: definition of recursive extensions [message #552256 is a reply to message #552249]

Wed, 11 August 2010 09:04

Eclipse User

ElArbi wrote on Wed, 11 August 2010 14:47

Hello

I have an error on my ext file:
Couldn't find extension : getWebApp(c.eContainer)

DataTable getDataTable(Column col):
getDataTable(col.eContainer);
DataTable getDataTable(DataTable d):
d;
DataTable getDataTable(EObject e):
null;

Copy & Paste error?
getWebApp != getDataTable
You need a extension like this:
getWebApp(Object o):
null;

Quote:

I have also proble with the extend editor: it doesn't underline the wright line with the error.

I have checked this with a little example. The extension is marked correct.
What does your editor do?

Regards
Darius

Re: [Xtend]: definition of recursive extensions [message #552693 is a reply to message #552256]

Fri, 13 August 2010 04:17

Eclipse User

Excellent it works with Object e.g.:
DataTable getDataTable(Column col):
getDataTable(col.eContainer);
DataTable getDataTable(DataTable d):
d;
DataTable getDataTable(Object e):
null;

But why it is not working for EObject ?
Which metamodel is 'Object' from ?

thanks

Re: [Xtend]: definition of recursive extensions [message #552700 is a reply to message #552693]

Fri, 13 August 2010 04:37

Eclipse User

Hi,

Object is from the Xpand internal Typesystem.
EObject may not work since you may use ecore::EObject ??? but you have to use emf::EObject to get it working.
For analyzing the hierarchies the extensions .metaType and .metaType.superTypes may be useful.

Regards
Christian

[Updated on: Fri, 13 August 2010 04:40] by Moderator

Re: [Xtend]: definition of recursive extensions [message #553612 is a reply to message #552700]

Wed, 18 August 2010 04:18

Eclipse User

You mean that the emf metamodel is not the ecore metamodel in eclipse?

Re: [Xtend]: definition of recursive extensions [message #553618 is a reply to message #553612]

Wed, 18 August 2010 04:30

Eclipse User

hi,

the namespace ecore is for working with the ecore itself: e.g. when processing an .ecore file as model and working with EClass EAttribute EReference and so on.

If you just want to refer to the parent of an instance these (e.g. an EClass Model) you have to use the namespace emf and therein emf::EObject - this is just a technical thing (cause every metaclass inherits from EObject)

~Christian

[Updated on: Wed, 18 August 2010 04:35] by Moderator

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