Eclipse Community Forums: TMF (Xtext) » Validating against non EMF context

Help

Home

Home » Modeling » TMF (Xtext) » Validating against non EMF context(How to do per instance synamic validation)

Show: Today's Messages :: Show Polls :: Message Navigator

Validating against non EMF context [message #1843624]

Wed, 11 August 2021 07:00

Jeff Lowcock

Messages: 17
Registered: July 2009

Junior Member

I have an embedded editor mostly working. The editor has a context which the editor contents are validated against - for example I have a variable that must be associated with an external value from a combo. In this case it is a currency name that must match the externally selected currency, This all works as I have modified the Validator with the appropriate check.

When I have two editors open the issue is that the Validation is a singleton and hence the state/context is shared between the open editors - which is unworkable as obviously I would like to be able to edit more than one resource at a time and I do not want to face the issue of only a single currency able to be selected at a time.

I have spent the last 3-4 weeks looking at code, trying to understand how xtext hangs together and at this point I admit defeat.

So my question how can I apply the context of each editor instance independently. I suspect this means I will have to supply another validator to do context based validation - but so far I cannot even see where to begin.

Need some guidelines here - where next?

Report message to a moderator

Re: Validating against non EMF context [message #1843625 is a reply to message #1843624]

Wed, 11 August 2021 07:03

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

hi, for each embedded editor you create a resource. you should be able to add the information there as an Adapter and retrieve it from validation

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

Report message to a moderator

Re: Validating against non EMF context [message #1843654 is a reply to message #1843625]

Thu, 12 August 2021 09:35

Jeff Lowcock

Messages: 17
Registered: July 2009

Junior Member

Christian thank for the hint - I had to read a bit more so learned a few more lessons. In brief I made an Adapter class to hold the context information. Applied this class to the resource after creation. In the validator I return the adapter from the eResource referenced from the EObject being validated. Every thing works as intended. I am left with a small niggle as I feel I am not really using Adapters as intended - however I will resolve that with more reading. For now my 3-4 week long journey ended in 30 minutes or coding and testing with no further issues (except code clean up). Once again thank you for your guidance.

Report message to a moderator

Previous Topic:	Context Validation
Next Topic:	Customize Java-Expression "toString"

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Tue Apr 16 14:31:17 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter