Eclipse Community Forums: ATL » [Solved] Using an extended set of primitive ECore types

Help

Home

Home » Modeling » ATL » [Solved] Using an extended set of primitive ECore types

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

[Solved] Using an extended set of primitive ECore types [message #1831937]

Thu, 03 September 2020 10:12

Michael Relby

Messages: 9
Registered: November 2013

Junior Member

Hello. Some types in my metamodel contains attributes of types like EByte, EFloat, which is unsupported by OCL spec. In the ATL rules (with EMFTVM compiler) I sometime need to assign a static values to such attributes like

SomeFloatAttribute <- 10.0,

This doesn't work, because at runtime this value treated as Double which produces ClassCastException when assigning to the attribute of type Float.

I did some research but as far found only two ways:

change metamodel, limit use of types only supported by OCL
use some sort of calls to a native java helper class to convert types

I hope I miss the clean and convenient way to solve this. Any help is appreciated :)

[Updated on: Fri, 04 September 2020 13:50]

Report message to a moderator

Re: Using an extended set of primitive ECore types [message #1831960 is a reply to message #1831937]

Thu, 03 September 2020 17:38

Dennis Wagelaar

Messages: 589
Registered: September 2012
Location: Belgium

Senior Member

Primitive types can be obtained by using native Java methods on Integer, Double, and String:

-- @atlcompiler emftvm
module PrimitiveTypeTest;
create OUT : PTT from IN : PTT;

rule Entity {
	from
		s : PTT!Entity
	to
		t : PTT!Entity (
			byte <- 15.byteValue(),
			char <- 't'.charAt(0),
			double <- 15.8,
			float <- 15.8.floatValue(),
			int <- 31,
			long <- 31.longValue(),
			name <- 'Entity',
			short <- 31.shortValue()
		)
}

Cheers,
Dennis

Report message to a moderator