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[XCore] how to create an EMF object instance in an operation? [message #1712476]

Sun, 25 October 2015 18:48

Bryan Hunt

Messages: 366
Registered: July 2009

Senior Member

How do I create an instance of another EMF object in an operation? I tried:

op MyObject build()
{
val MyObject = MyFactory.eINSTANCE.createMyObject()
}

and that doesn't work.

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Re: [XCore] how to create an EMF object instance in an operation? [message #1712516 is a reply to message #1712476]

Mon, 26 October 2015 09:18

Hallvard Traetteberg

Messages: 673
Registered: July 2009
Location: Trondheim, Norway

Senior Member

Saying something "doesn't work" isn't very helpful. Doesn't it compile
or generate code? Does the generated code crash? What error messages
are provided? Also, knowing what version(s) you are using and what
libraries are on the class path is also useful.

Hallvard

On 2015-10-25 18:48:47 +0000, Bryan Hunt said:

> How do I create an instance of another EMF object in an operation? I tried:
>
> op MyObject build()
> {
> val MyObject = MyFactory.eINSTANCE.createMyObject()
> }
>
> and that doesn't work.

--
Hallvard Trætteberg (hal@xxxxxxxx.no)
Associate Professor, IS group, Dept. of Computer and Information
Science at the
Norwegian Univ. of Science and Technology

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Re: [XCore] how to create an EMF object instance in an operation? [message #1712522 is a reply to message #1712516]

Mon, 26 October 2015 09:52

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

The debugger is always your friend when you have no better ideas.

One possible avenue to investigate is the use of a return statement.

Regards

Ed Willink

On 26/10/2015 09:18, Hallvard Trætteberg wrote:
> Saying something "doesn't work" isn't very helpful. Doesn't it compile
> or generate code? Does the generated code crash? What error messages
> are provided? Also, knowing what version(s) you are using and what
> libraries are on the class path is also useful.
>
> Hallvard
>
> On 2015-10-25 18:48:47 +0000, Bryan Hunt said:
>
>> How do I create an instance of another EMF object in an operation? I
>> tried:
>>
>> op MyObject build()
>> {
>> val MyObject = MyFactory.eINSTANCE.createMyObject()
>> }
>>
>> and that doesn't work.
>
>

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Re: [XCore] how to create an EMF object instance in an operation? [message #1712560 is a reply to message #1712516]

Mon, 26 October 2015 12:08

Bryan Hunt

Messages: 366
Registered: July 2009

Senior Member

I'm using the latest release version. The editor gives the following error:

Couldn't resolve reference to JvmIdentifiableElement 'eINSTANCE'.

There is a quick fix to "Change to INSTANCE" if you click that, the editor is happy, but the generated code does not compile. The error message is:

INSTANCE could not be resolved or is not a field.

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Re: [XCore] how to create an EMF object instance in an operation? [message #1712636 is a reply to message #1712560]

Tue, 27 October 2015 05:19

Ed Merks

Messages: 33142
Registered: July 2009

Senior Member

Bryan,

That works for me. Are there @GenModel annotations involved?

On 26/10/2015 1:08 PM, Bryan Hunt wrote:
> I'm using the latest release version. The editor gives the following
> error:
>
> Couldn't resolve reference to JvmIdentifiableElement 'eINSTANCE'.
>
> There is a quick fix to "Change to INSTANCE" if you click that, the
> editor is happy, but the generated code does not compile. The error
> message is:
>
> INSTANCE could not be resolved or is not a field.

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

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Re: [XCore] how to create an EMF object instance in an operation? [message #1712648 is a reply to message #1712636]

Tue, 27 October 2015 07:51

Mikaël Barbero

Messages: 3
Registered: February 2015

Junior Member

Bryan,

In addition to Ed's question, did you set the genmodel option suppressInterfaces to "true"? I can reproduce your error with this option set to true.

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Re: [XCore] how to create an EMF object instance in an operation? [message #1712686 is a reply to message #1712648]

Tue, 27 October 2015 13:34

Bryan Hunt

Messages: 366
Registered: July 2009

Senior Member

Yes, suppress interfaces is true

@GenModel(suppressInterfaces="true", copyrightText="Copyright (c) 2015 Bryan Hunt\n\nAll rights reserved. This program and the accompanying materials\nare made available under the terms of the Eclipse Public License v1.0\nwhich accompanies this distribution, and is available at\nhttp://www.eclipse.org/legal/epl-v10.html\n\nContributors:\n Bryan Hunt - initial API and implementation\n")
@GenModel(runtimePlatform="RCP")

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