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Home » Modeling » TMF (Xtext) » Validation (warning) when object is not used
Validation (warning) when object is not used [message #1804343] Fri, 22 March 2019 17:35 Go to next message
Željko Kovačević is currently offline Željko KovačevićFriend
Messages: 16
Registered: March 2019
Junior Member
Hi,

I would like to give warning for the variable (object) that was declared but never used in code. Any example for this?

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Re: Validation (warning) when object is not used [message #1804416 is a reply to message #1804343] Mon, 25 March 2019 19:32 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 13071
Registered: July 2009
Senior Member
do you want to do this locally or globally.
if locally: simply traverse the file for references
if globally: this will be hard. you have to do this in the index. and do it as expensive validation which is explicitely triggered

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Re: Validation (warning) when object is not used [message #1804417 is a reply to message #1804416] Mon, 25 March 2019 20:05 Go to previous messageGo to next message
Željko Kovačević is currently offline Željko KovačevićFriend
Messages: 16
Registered: March 2019
Junior Member
Locally will do for now. Your answer in my previous topic helped me to understand how to traverse the file for references.

Thanks!

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Re: Validation (warning) when object is not used [message #1804419 is a reply to message #1804417] Mon, 25 March 2019 20:08 Go to previous messageGo to next message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 13071
Registered: July 2009
Senior Member
well i would be doing basically the same.
traverse the tree. looks where references are.
maybe use org.eclipse.xtext.EcoreUtil2.findCrossReferences(EObject, Set<? extends EObject>, ElementReferenceAcceptor)

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Re: Validation (warning) when object is not used [message #1804420 is a reply to message #1804419] Mon, 25 March 2019 20:18 Go to previous messageGo to next message
Željko Kovačević is currently offline Željko KovačevićFriend
Messages: 16
Registered: March 2019
Junior Member
Yes. I understood that I need to traverse but didn't know how.

Like I said, I am just a beginner :)

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Re: Validation (warning) when object is not used [message #1804422 is a reply to message #1804420] Mon, 25 March 2019 20:30 Go to previous message
Christian Dietrich is currently offline Christian DietrichFriend
Messages: 13071
Registered: July 2009
Senior Member
the esiest is to traverse your model along the structure

ask model for its models
have a look if there are student, course, enroll.
have a looks at the references within these

Need professional support for Xtext, Xpand, EMF?
Go to: https://www.itemis.com/en/xtext/
Twitter : @chrdietrich
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