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HOT helpers [message #1814261]

Fri, 06 September 2019 18:46

Yassmine Gara Hellal

Messages: 9
Registered: April 2019

Junior Member

Hi can some one lead me plz to helpers written with HOT?
and what are the features that exists in IterateExp?
i want to write this part of helper

iterate(e; acc : Sequence(xm!a)
acc->union(e.allFeatures())

so i wrote :
h1:ATL!IterateExp (
source <- h1exp,
body <- h1union,
iterators <- Set{h1iterator1})

the result obtained is :

iterate(e, acc; |
acc->union(e.allFeatures())

i think some features on IterateExp are missed. can u correct for me the statement to otein the good result? and can u lead me to helpers written with HOT i can't found a suffisant documentation.

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Re: HOT helpers [message #1814603 is a reply to message #1814261]

Fri, 13 September 2019 19:26

Dennis Wagelaar

Messages: 581
Registered: September 2012
Location: Belgium

Senior Member

The best way to learn about the ATL metamodel is to start by writing the expression you want to achieve in the ATL editor. Then, you right-click the .atl file in the Project Explorer view (or Package Explorer, as long as it shows your files...), and you select Open With -> Other... and then you choose Sample Reflective Ecore Model Editor. This will give you an abstract syntax tree (AST) editor of the ATL file. To find out more about the property values for a given AST node, such as your IterateExp, right-click the node and select Show Properties View. Note: all containment properties are typically hidden in the properties view, and can only be viewed in the main tree view, but without the property names(!). To circumvent this problem, you also also try to use the MoDisco Model Browser instead of the Sample Reflective Ecore Model Editor: this will give you a more detailed view of the property values.

Cheers,
Dennis

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