| Using a integer iterator [message #1101426] |
Wed, 04 September 2013 12:52  |
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Hi everyone!
I need to iterate a certain number of times, according with the integer value of an attribute.
Let's say that I have an object 'A' with an attribute 'int_att', and I'd like to create as many 'B' as indicated by this attribute.
I found a solution, but I want to know if there is a better way, because I was looking in the documentation and in the forum with no luck.
First I create a collection to have something to iterate
helper def : getCollectionFrom1to(i:Integer) : Collection(Integer) =
if i>1
then
thisModule.getCollectionFrom1to(i-1)->including(i)
else
Sequence{1}
endif;
Then I iterate this collection doing what I need
for (it in thisModule.getCollectionFrom1to(A.int_att)) {
thisModule.createB(A);
}
Thank you in advance for any feedback
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| Re: Using a integer iterator [message #1102458 is a reply to message #1101469] |
Thu, 05 September 2013 19:46  |
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Op 04-09-13 15:51, Federico Toledo schreef:
> I guess it is not implemented because it does not compile...
> thank you!
You're right: ATL syntax does not support the OCL range idiom, so ATL cannot
parse it. For regular ATL, your solution is fine.
Note that ATL/EMFTVM introduces a separate operation for including ranges into
a Collection, which is implemented lazily: Collection::includingRange(start :
Integer, end : Integer) : Collection. It does not actually store the whole
range of numbers, but just generates numbers as the collection is evaluated.
Regards,
Dennis
Cheers,
Dennis
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