Eclipse Community Forums: Epsilon » [EVL] How to acces a element in my model

Home » Modeling » Epsilon » [EVL] How to acces a element in my model

[EVL] How to acces a element in my model [message #989174]

Tue, 04 December 2012 19:44

Eclipse User

Hi , first I attached a picture of my metamodel to explain what I need help with

From the picture you can see that a navigational class has attributes and operations.So I don't know how to make or the syntax to create a constraint that checks all the navigational attributes associated with a specific navigational class. Like check for each navigational class all of navigational attributes associated with it.

Thanks in advance for your help

pd: sorry for my English, not my native language Razz

Attachment: metamodelexample.jpg
(Size: 37.69KB, Downloaded 368 times)

Re: [EVL] How to acces a element in my model [message #989279 is a reply to message #989174]

Wed, 05 December 2012 08:48

Eclipse User

Hi,

Would the following work?

context NAVIGATIONALATTRIBUTE {

constraint SomeConstraint {
check: ...
}

}

Cheers,
Dimitris

Re: [EVL] How to acces a element in my model [message #989343 is a reply to message #989174]

Wed, 05 December 2012 13:17

Eclipse User

not really,I want to do something like this (i know the sintax and the code its not right)

context NAVIGATIONALCLASS {

constraint SomeConstraint {
check: self.name = "something" and self.NavigationalClassNavigationalAttribute.name="anotherthing";

}

}

Something like that so i can check all the navigational attributes associated with a navigational class in specific and check the value name in both the class and the attribute.

I hope that clarifies what i'm trying to do

thx for the help

Re: [EVL] How to acces a element in my model [message #989351 is a reply to message #989343]

Wed, 05 December 2012 13:52

Eclipse User

Hi,

If you need to check only the attributes of a specific class (X) you could use a guard to specify this e.g.

context NAVIGATIONALATTRIBUTE {

constraint SomeConstraint {
guard: self.eContainer()./*this navigates to the container NAVIGATIONALCLASS*/.name = "X"
check: ...
}

}

Cheers,
Dimitris

Re: [EVL] How to acces a element in my model [message #989357 is a reply to message #989351]

Wed, 05 December 2012 15:10

Eclipse User

I think thats it , i will try it later since i cant at the moment and will comment back.

Thx alot for all the help

Re: [EVL] How to acces a element in my model [message #989594 is a reply to message #989357]

Thu, 06 December 2012 17:11

Eclipse User

it worked perfect
I got a last question, its there a place where i can check all the things i can use with evl like the .eContainer()? , because i never knew that existed.

Thx alot again

Re: [EVL] How to acces a element in my model [message #989595 is a reply to message #989594]

Thu, 06 December 2012 17:17

Eclipse User

Hi Sebastian,

eContainer() is a method of EObject which is the interface that all EMF model elements conform to (see http://download.eclipse.org/modeling/emf/emf/javadoc/2.4.3/org/eclipse/emf/ecore/EObject.html for more methods)

Cheers,
Dimitris

Re: [EVL] How to acces a element in my model [message #1724108 is a reply to message #989174]

Sat, 20 February 2016 20:02

Eclipse User

Hi Dimitris,

Is it possible check if the compartment contains elements?

@gmf.node(label="name", label.text="Procedure", border.color="255,13,13")
class Procedure extends Subprograms {
@gmf.compartment
val Parameters[*] parameters;
}

Cheers,
Crystal.

Re: [EVL] How to acces a element in my model [message #1724119 is a reply to message #1724108]

Sun, 21 February 2016 05:30

Eclipse User

Hi Crystal,

Would a constraint like the one below do the trick?

context Procedure {
  constraint HasParameters {
    check: not self.parameters.isEmpty()
  }
}

Cheers,
Dimitris

Re: [EVL] How to acces a element in my model [message #1724131 is a reply to message #1724119]

Sun, 21 February 2016 10:34

Eclipse User

Yes, this worked for me.

Thank you, Dimitris Smile

Previous Topic:	EOL: Call by reference and Map type
Next Topic:	query 2 xml files at the same time

Goto Forum:

-=] Back to Top [=-

Current Time: Thu Jul 03 17:08:23 EDT 2025

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter