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Transformation parameters [message #1857497]

Fri, 10 February 2023 06:50

Eclipse User

I want to specify parameters for a transformation.

There is an "How to" about this here: https://wiki.eclipse.org/ATL/Howtos#How_do_I_declare.2Fuse_external_parameters_in_ATL_transformations.3F

However it does not seem to work as specified. This is illustrated in the attached sample that generate the following exception when I try to execute it:

org.eclipse.emf.ecore.resource.impl.ResourceSetImpl$1DiagnosticWrappedException: org.eclipse.emf.ecore.xmi.PackageNotFoundException: Package with uri 'null' not found. (platform:/resource/[...]/TestScope.xml, 2, 13)

Any idea?

Attachment: TestParam.zip
(Size: 1.48KB, Downloaded 103 times)

Re: Transformation parameters [message #1857505 is a reply to message #1857497]

Sat, 11 February 2023 13:38

Eclipse User

EMFTVM does not support the XML injector that can load schema-less XML into an EMF model. There are several other ways to provide parameters in a separate file to a transformation:

In an ATL library with helper attributes
In a separate Ecore model, e.g. by using EAnnotations

See attached zipped Eclipse project for an example of the second option.

Attachment: ATLTestParam.zip
(Size: 3.44KB, Downloaded 114 times)

Re: Transformation parameters [message #1857522 is a reply to message #1857505]

Mon, 13 February 2023 08:53

Eclipse User

Hello Dennis,

Thanks you. I'll study it.
On the other hand, do you mean that adding a XML schema would also be an alternative?

Re: Transformation parameters [message #1857781 is a reply to message #1857522]

Sat, 25 February 2023 09:15

Eclipse User

Yves BERNARD wrote on Mon, 13 February 2023 14:53

On the other hand, do you mean that adding a XML schema would also be an alternative?

Using XML schema with EMF is much more labour intensive, even more so than defining a dedicated metamodel for parameters. See https://www.eclipse.org/modeling/emf/docs/2.x/tutorials/xlibmod/xlibmod_emf2.0.html

If you're looking for a generic parameter metamodel, here's an example: https://git.eclipse.org/c/mmt/org.eclipse.atl.git/tree/usecases/org.eclipse.m2m.atl.research.aml/dsls/AML/Metamodel/Parameter.ecore

Re: Transformation parameters [message #1858150 is a reply to message #1857781]

Fri, 17 March 2023 09:21

Eclipse User

Thanks Dennis, eventually I decided to use the "ecore" solution as you suggest. It is convenient, indeed.

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