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Create object of dsl ecore classes programatically from generator (xtend) [message #1870650]

Wed, 04 September 2024 10:26

Eclipse User

The classes in my ecore explorer (all of them, including "PortInfo") are not marked "interface" or "abstract".
The code below rases an editor error on "

P1=new PortInfo;

" saying "cannot instantiate the interface of type PortInfo"

			«{var PortInfo P1 ; 
				P1=new PortInfo;
				P1.signal=r.name ;
				P1.direction=tRtlPortDirection.PORT_OUT;
				P1.signalType=r.typeString;
				RegIF.portList.add(P1);
			}»

I want the generator.xtend to collect information while generating and at some point add it to a list, that is a reference attribute in the class of the "RegIF" object.

If "PortInfo" is indeed an interface although NOT marked as such in the ecore, I believe I have to create an implementation for it. I did that in a separate xtend file

import ridl2.PortInfo
import ridl2.tRtlPortDirection

class PortInfo1 implements PortInfo{
	String signal
	String signalType
	tRtlPortDirection direction
	
	override getDirection() {
		return direction
	}

and do this instead in generator.xtend :

			«{var PortInfo1 P1 ; 
				P1=new PortInfo1;
				P1.signal=r.name ;
				P1.direction=tRtlPortDirection.PORT_OUT;
				P1.signalType=r.typeString;
				RegIF.portList.add(P1);
			}»

Obviously "RegIF.portList.add(P1); " fails miserably because "PortInfo1 " is a wrong class.

The overall question is: How do I make the PortInfo objects in the xtend code so I can add to RegIF.portList (in the same xtend code)

Alternatively, where and how do I add a PortInfo list to the RegIF class without editing generated files.

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Re: Create object of dsl ecore classes programatically from generator (xtend) [message #1870653 is a reply to message #1870650]

Wed, 04 September 2024 10:43

Eclipse User

In emf you create instances with

MyPackageFactory.eInstance.createMyClass

Re: Create object of dsl ecore classes programatically from generator (xtend) [message #1870674 is a reply to message #1870653]

Thu, 05 September 2024 02:27

Eclipse User

Thanks!
This solved my problem. In my context the literal wording is

import ridl2.Ridl2Factory
...
var PortInfo P ;
P=new PortInfo; // wrong
P=Ridl2Factory.eINSTANCE.createPortInfo; // right

/Anders

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