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[Xtend] Using EEnum Literals within Xtend expressions [message #545947]

Fri, 09 July 2010 16:40

Abdull

Messages: 32
Registered: May 2010

Member

So in my Ecore metamodel (Name / Ns Prefix "hl_dsp_pimm_02") I have an EEnum called "DataType".
It has "EEnum Literals" such as "Float", "Sint16", etc.

I require access to these enum literals within my Xtend model transformation.
That is I have an expression such as

let someDataType = hl_dsp_pimm_02::DataType::SINT16 :

When I try to run my workflow, I get the following exception ...

EvaluationException : Couldn't find enum literal or type 'hl_dsp_pimm_02::DataType::SINT16'

... even though I have imported hl_dsp_pimm_02 in my Xtend file, and even though I can work with any other meta model elements such as my hl_dsp_pimm_02's EClasses, EReferences etc.

Any ideas on how to access EEnum literals?
Thank you all once again!

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Re: [Xtend] Using EEnum Literals within Xtend expressions [message #546036 is a reply to message #545947]

Sat, 10 July 2010 07:24

Christian Dietrich

Messages: 13314
Registered: July 2009

Senior Member

Hello,

which version of xpand/xtend do you use? i tried it with 1.0.0
and something like

<<this.attr == mypackage::MyEnum::MyEnumLiteralName>>

works. But note MyEnumLiteralName is the Name attribute of the eenumliteral and not the Literal attribute

Regards
Christian

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/xtext/
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Re: [Xtend] Using EEnum Literals within Xtend expressions [message #546059 is a reply to message #546036]

Sat, 10 July 2010 15:13

Abdull

Messages: 32
Registered: May 2010

Member

Hello Christian,

thank you very much, it seems that your hint solved my problem!

The problem was I used

hl_dsp_pimm_02::DataType::SINT16

where I should have used

hl_dsp_pimm_02::DataType::Sint16

... That is, you mustn't use the spelling as hinted in the enum type of the auto-generated Java file (SINT16), but you have to use the same case-sensitive writing of the EEnum Literal as written in its "name" property (Sint16).

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