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Copying object properties [message #1288368] Tue, 08 April 2014 13:59 Go to next message
Vlad Acretoaie is currently offline Vlad AcretoaieFriend
Messages: 93
Registered: April 2014
In the following ETL rule the Source and Target models both conform to the OO.ecore metamodel found in org.eclipse.epsilon.examples.metamodels.

rule CopyAttribute
	transform source : Source!Attribute
	to target : Target!Attribute { =;
	target.visibility = source.visibility;

The "name" property is an instance of EString and is copied as expected. However, the "visibility" property is an instance of EEnumLiteral, and copying its value as shown above produces a ClassCastException. I don't understand why the two properties are treated differently.

I have also tried the following assignment:

target.visibility ::= source.visibility;

In this case, the value of target.visibility is always set to "public", regardless of the value of source.visibility.

In short, my question is: how can I copy the value of the "visibility" property to the target?
Re: Copying object properties [message #1288381 is a reply to message #1288368] Tue, 08 April 2014 14:09 Go to previous message
Dimitris Kolovos is currently offline Dimitris KolovosFriend
Messages: 1528
Registered: July 2009
Location: York, UK
Senior Member

Hi Vlad,

I'd suggest trying to load Source and Target models using the same URI-based metamodel.


[Updated on: Tue, 08 April 2014 14:09]

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