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Expressions and MOKA [message #1746776]

Fri, 04 November 2016 09:20

Eclipse User

Dear folks,

Is it possible to use MOKA considering parameters from classes to be used in expressions? For example, I have this expression "a + b". I have classes that has the parameters a and b. Now, I created a simple activity diagram with MOKA and I'd like to read a and b from classes and run the expression a + b.

Is it possible?

Re: Expressions and MOKA [message #1747207 is a reply to message #1746776]

Thu, 10 November 2016 12:31

Eclipse User

Dear Bruno -

it is possible to achieve the goal you mention with Moka.

[1] Create a class and make sure it is active (isActive property is true).
[2] Add two properties a and b in this the created class. These properties might be of type Integer.
[3] Create an activity in your class.
[4] Set the activity as being the classifier behavior of that class. To do so, select your class, go to the advance tab and in the field classifier behavior make sure the activity is referenced.
[5] Implement your activity to perform the addition
----[5.1] Add a read structural feature for property a
----[5.2] Add a read structural feature for property b
----[5.3] Add a call behavior for PrimitiveBehaviors::IntegerFunctions::+. You need to have imported the fUML library to achieve this.
----[5.4] Connect result pin of read structural for property a to input pin x of the call behavior for PrimitiveBehaviors::IntegerFunctions::+ using an ObjectFlow.
----[5.5] Connect result pin of read structural for property b to input pin y of the call behavior for PrimitiveBehaviors::IntegerFunctions::+ using an ObjectFlow.
----[5.6] Add a call behavior for PrimitiveBehaviors::IntegerFunctions::ToString.
----[5.7] Connect the result pin of the call behavior for PrimitiveBehaviors::IntegerFunctions::+ to the input pin x of the call behavior for PrimitiveBehaviors::IntegerFunctions::ToString using an ObjectFlow.
----[5.7] Add a call behavior for BasicInputOutput::WriteLine.
----[5.8] Connect the result pin of the call behavior for PrimitiveBehaviors::IntegerFunctions::ToString to the pin value of the call behavior for BasicInputOutput::WriteLine.
[6] Define an activity that
----[6.1] Instantiate your class
----[6.2] Initialize values of properties a and b.
----[6.3] Start the classifier behavior associated to the class you defined.
[7] Create a run configuration and indicate this activity as being the Element to be executed.
[8] Run your model. You must end up with the value corresponding to the result of the addition displayed in the console.

Let me know if that helps.

Jérémie

Re: Expressions and MOKA [message #1747987 is a reply to message #1747207]

Thu, 17 November 2016 08:09

Eclipse User

Hi Bruno,

In addition, you can also have a look at this tutorial: https://www.youtube.com/watch?v=itiAu9QZTMY&list=PL9nkS1KDTMm7XBenuBonLyAch1xFXiiuw&index=4
The tutorial is related to the FMI functionnalities of Moka, but you can probably inspire from it.

Basically, so far, there is no built in support for "expression evaluation" in Moka. This is why, as explained by Jérémie, the expression has to be "encoded" in an activity.

Please note also that Papyrus provides basic support for the Alf action language, so that you can specifiy textually the Activity described by Jeremie.

Cheers,

Arnaud

[Updated on: Thu, 17 November 2016 08:14] by Moderator

Re: Expressions and MOKA [message #1748092 is a reply to message #1747987]

Fri, 18 November 2016 07:25

Eclipse User

Hello Bruno!

Look at this:

https://www.eclipse.org/forums/index.php/t/1082515/

I am fighting for you.

Greetings

Wieslaw

Re: Expressions and MOKA [message #1748093 is a reply to message #1748092]

Fri, 18 November 2016 07:51

Eclipse User

ahah, great fight, by the way Razz

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