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[ATL] random function available? [message #69868]

Tue, 18 December 2007 12:31

Eclipse User

Originally posted by: r.c.ladan.tue.nl

Hi,

I wonder if there is a random() function available in ATL since I need this in a program for work.
An alternative would be to post-process the output in Java (e.g. substituting strings 'RANDOM' with a random value).

Thanks,
Rene

Re: [ATL] random function available? [message #715185 is a reply to message #69868]

Fri, 12 August 2011 12:00

Eclipse User

I also need it... some news? i need to invoke a rule using random function...I mean that in the input filter i would like to have a random calculation that decides if execute or not the rule...

Re: [ATL] random function available? [message #716014 is a reply to message #715185]

Tue, 16 August 2011 04:21

Eclipse User

You can modify the ATL VM engine to add a random function or you can add an EOperation in your meta-model that you will call in the ATL code.

Re: [ATL] random function available? [message #716399 is a reply to message #716014]

Wed, 17 August 2011 05:59

Eclipse User

can you provide more info on the second option? thx again

Re: [ATL] random function available? [message #716456 is a reply to message #716399]

Wed, 17 August 2011 09:05

Eclipse User

I don't know how to use EOperation... can I define a EOperation that calls a java method like random in MAth class??

Re: [ATL] random function available? [message #716460 is a reply to message #716456]

Wed, 17 August 2011 09:22

Eclipse User

Yes of course. EOperation are EMF things. Watch for the corresponding documentation.

Re: [ATL] random function available? [message #716765 is a reply to message #69868]

Thu, 18 August 2011 07:38

Eclipse User

ok...I defined an EOperation on my mm.... but now...I'm working on ecore in input metamodel and I guess I have to call s.refInvokeOperation(p.name, Sequence{}); ...
if i print s.eoperations i receive the right operation name...but if i try to call it i receive an error:
org.eclipse.m2m.atl.engine.emfvm.VMException: Operation getRandom not found on EClass

do you know why??

Re: [ATL] random function available? [message #717602 is a reply to message #69868]

Sun, 21 August 2011 12:34

Eclipse User

i defied correctly (i think) the eoperation...generated model code... defined the body of the Impl of the eoperation with my function...but:

Operation getRandom not found on C

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