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Dynamic Instance of XSD.ecore [message #75197]

Tue, 05 August 2008 08:56

Tim BrÃ¶mme

Messages: 19
Registered: July 2009

Junior Member

Hi,

I was just trying to use the EMF feature to create dynamic instances of
an ecore file (right click on elment in ecore file -> create dynamic
instance).
If u use this feature on the root element of your model, you are able to
create
an instance of your metamodel without generating an editor.
as I said, I tried this with the XSD.ecore file, but there seems to be a
problem.

These are my steps:

1. Open XSD.ecore with "Sample Ecore Model Editor"
2. Right Click on "XSD Schema -> XSD Scope"
3. "Create Dynamic Instance"
4. Open resulting file with "Sample Reflective Ecore Model Editor"
5. Right Click on "XSD Schmema" -> "new Child" -> "Contents XSD Element
Declaration"
6. Save Model, Close File
7. Open File again -> Several Errors raise ("Value #null is not legal")

These same steps I do with other *.ecore files and it works perfectly.
Most of these are handmade by me / us at TU Berlin, the XSD.ecore is one
of the few which came from "outside".
The first guess is, that "XSD Schema" is not the root element of the XSD
Metamodel, but I have no idea which other element could be the root.
Maybe the problem is somewhere else. Do you have an idea ?

Thanks in adavance,
Tim

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Re: Dynamic Instance of XSD.ecore [message #75234 is a reply to message #75197]

Tue, 05 August 2008 13:10

Ed Merks

Messages: 33137
Registered: July 2009

Senior Member

This is a multi-part message in MIME format.
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Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 8bit

Tim,

Because the XSD model wasn't carefully designed to support an XMI
serialization your approach won't work:

https://bugs.eclipse.org/bugs/show_bug.cgi?id=166638

Note that the model wasn't built by using XSD -> Ecore mapping on the
XML schema for schemas, so it doesn't have a document root or all the
extended metadata annotations for serializing in a way to conform to the
schema; that's all hand code stuff.

Tim Br

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

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