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xtext and ocl [message #1854281]

Wed, 10 August 2022 10:20

navid shm

Messages: 1
Registered: August 2022

Junior Member

hi
I'm trying to create a simple xtext project in which:
- user defines a model based on the xtext specified grammer in a file (e.g. model.dsl)
- user defines constraints in a separate file (e.g. constraints.ocl)
- the project (which is a *.jar file or running in eclipse UI) gets these files and validates the model file (models.dsl) based on constraints file (constraints.ocl)

what I'm looking for is a way to allow user to specify custom constraints using OCL to validate the model which created by xtext editor.

I already searched but couldn't find anything on implementing such project

* note: any grammer is fine, even greeting
* I tried implementing parts of OCL in my grammer and it was not a nice experience :)
* any better idea for replacing OCL with other eclipse tools for defining constraints is acceptable

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Re: xtext and ocl [message #1854289 is a reply to message #1854281]

Wed, 10 August 2022 18:21

Ed Willink

Messages: 7655
Registered: July 2009

Senior Member

Hi

The Eclipse OCL project provides OCL support that includes Xtext-based editors.

If you just want OCL constraints on your models then you should find the OCLinEcore editor is exactly what you want. (The alternatives are manual Java, or Xtext Checks language, or ...)

If you really want to implement a 'better' OCL then you are heading down a very diffcult path for which a review of what Xbase provides would be a prudent first step.

Regards

Ed Willink

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