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

Tue, 04 December 2012 19:44

Sebastian Rivera
Messages: 7
Registered: December 2012

Junior Member

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

Wed, 05 December 2012 08:48

Dimitris Kolovos
Messages: 798
Registered: July 2009

Senior Member

Hi,

Would the following work?

context NAVIGATIONALATTRIBUTE {

constraint SomeConstraint {
check: ...
}

}

Cheers,
Dimitris

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

Wed, 05 December 2012 13:17

Sebastian Rivera
Messages: 7
Registered: December 2012

Junior Member

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

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

Wed, 05 December 2012 13:52

Dimitris Kolovos
Messages: 798
Registered: July 2009

Senior Member

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

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

Wed, 05 December 2012 15:10

Sebastian Rivera
Messages: 7
Registered: December 2012

Junior Member

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

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

Thu, 06 December 2012 17:11

Sebastian Rivera
Messages: 7
Registered: December 2012

Junior Member

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

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

Thu, 06 December 2012 17:17

Dimitris Kolovos
Messages: 798
Registered: July 2009

Senior Member

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

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