Eclipse Community Forums: ATL » Create multiple from one

Home » Modeling » ATL » Create multiple from one(Create multiple elements in output model based on one element from source model)

Show: Today's Messages :: Show Polls :: Message Navigator

Create multiple from one [message #1799496]

Fri, 07 December 2018 17:33

Cesar Bernabe

Messages: 13
Registered: December 2016

Junior Member

Hi,

I need to instantiate a given element in the target model from an attribute in a source model. For example:

Source Model:
Element1 {
name,
references -> Element2
}

Element2 {
name
}

Target Model:
Element1 {
name
}

Element2 {
name
}

Element3 { (created from source model Element1 references)
source <- Element1
target <- Element2
}

I tried to use lazy rules but I could not assign the values of source and target on Element3. Can someone please help me with this?

Thanks.

Report message to a moderator

Re: Create multiple from one [message #1799533 is a reply to message #1799496]

Sat, 08 December 2018 19:51

Cesar Bernabe

Messages: 13
Registered: December 2016

Junior Member

Oh, I forgot to mention that the "references" variable in the first module is an array and therefore refers to several elements. It would then be necessary to create one "Element3" (in the second model) for each array index of the first model.

Report message to a moderator

Re: Create multiple from one [message #1799559 is a reply to message #1799533]

Mon, 10 December 2018 09:53

Dennis Wagelaar

Messages: 581
Registered: September 2012
Location: Belgium

Senior Member

Like so:

-- @atlcompiler emftvm
-- @path ONE=/ATLMultipleFromOne/metamodels/One.ecore
-- @path MULTIPLE=/ATLMultipleFromOne/metamodels/Multiple.ecore
module MultipleFromOne;
create OUT: MULTIPLE from IN: ONE;

rule Element1 {
	from
		s: ONE!Element1
	to
		t: MULTIPLE!Element1
	do {
		for (r in s.references) {
			thisModule.Element3(s, r);
		}
	}
}

rule Element2 {
	from
		s: ONE!Element2
	to
		t: MULTIPLE!Element2
}

unique lazy rule Element3 {
	from
		e1: ONE!Element1,
		e2: ONE!Element2
	to
		t: MULTIPLE!Element3 (
			source <- e1,
			target <- e2
		)
}

See example Eclipse project in attachment.