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Epsilon ETL - Ecore2Ecore full copy [message #1841123]

Tue, 04 May 2021 13:09

Daniele Oriana

Messages: 2
Registered: May 2021

Junior Member

Hi, i have an Ecore file called "PS.ecore" that contains a big structure with a root element called "root". Is possible, using ETL, to create a full copy of PS.ecore starting from root into another ecore file called migrated.ecore? If is possible, can you show me the code? I'm a begineer in ETL, i'm sorry for my english. Thanks.

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Re: Epsilon ETL - Ecore2Ecore full copy [message #1841125 is a reply to message #1841123]

Tue, 04 May 2021 13:17

Dimitris Kolovos

Messages: 2163
Registered: July 2009
Location: York, UK

Senior Member

Hi Daniele,

Could you please describe how the migrated Ecore file should be different to the original Ecore file? If you could attach a concrete example in Ecore/Emfatic [1] that would help a lot.

Best,
Dimitris

[1] https://www.eclipse.org/emfatic/

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Re: Epsilon ETL - Ecore2Ecore full copy [message #1841126 is a reply to message #1841125]

Tue, 04 May 2021 13:23

Dimitris Kolovos

Messages: 2163
Registered: July 2009
Location: York, UK

Senior Member

Hi again,

If you're just looking to copy the metamodel, you can replace

original.setMetamodelFile(modelsRoot.resolve("Tree.ecore").toAbsolutePath().toString());
original.setModelFile(modelsRoot.resolve("Tree.xmi").toAbsolutePath().toString());
...
migrated.setMetamodelFile(modelsRoot.resolve("Tree.ecore").toAbsolutePath().toString());
migrated.setModelFile(modelsRoot.resolve("Tree.migrated.xmi").toAbsolutePath().toString().replace("/target/classes/", "/src/"));

with

original.setMetamodelUri(EcorePackage.eINSTANCE.getNsURI());
original.setModelFile(modelsRoot.resolve("Tree.ecore").toAbsolutePath().toString());
 		original.load();
...
migrated.setMetamodelUri(EcorePackage.eINSTANCE.getNsURI());
migrated.setModelFile(modelsRoot.resolve("Tree.migrated.ecore").toAbsolutePath().toString().replace("/target/classes/", "/src/"));

in the example in [1].

Best,
Dimitris

[1] https://git.eclipse.org/c/epsilon/org.eclipse.epsilon.git/tree/examples/org.eclipse.epsilon.examples.standalone/src/org/eclipse/epsilon/examples/standalone/flock/FlockStandaloneExample.java

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Re: Epsilon ETL - Ecore2Ecore full copy [message #1841197 is a reply to message #1841126]

Thu, 06 May 2021 09:47

Daniele Oriana

Messages: 2
Registered: May 2021

Junior Member

Hi Dimitris,
i need just a copy of the metamodel, but i want to do it using only ETL code without usgin java. Do you think that is possible? Thanks.

Daniele

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Re: Epsilon ETL - Ecore2Ecore full copy [message #1841198 is a reply to message #1841197]

Thu, 06 May 2021 09:57

Dimitris Kolovos

Messages: 2163
Registered: July 2009
Location: York, UK

Senior Member

Hi Daniele,

Yes - my answer on Stackoverflow [1] re Flock also applies to ETL. However, I should note that ETL would be a poor choice of language for this task as it would require you to explicitly write all rules to copy elements across (e.g. EClass2EClass, EAttribute2EAttribute etc.). Flock is much more suitable for this task.

Best,
Dimitris

[1] https://stackoverflow.com/questions/67354310/epsilon-model-migration-flock-full-copy/67368628#comment119146970_67368628

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