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Issue with string comparison in helper... [message #1817672]

Wed, 27 November 2019 16:51

Olivier Hurez-Martin

Messages: 20
Registered: May 2019

Junior Member

Hello,

Using ATL 4.1.0 installed on Eclipse 2019-09.

I found out that the following helpers always return false, regardless of whether the qualified name of the UML type received from context equals the constant string hardcoded in the helper (as verified using debug statements, which also prove the helper is triggered, while traces in the caller show the returned value is always false):

-- Check for high level SysML UML stereotypes

helper context UML!Element def: isSysMLBlockStereotyped() : Boolean = 
	self.getAppliedStereotypes()->exists(s | let qn : String = s.getQualifiedName() in (qn.debug('STEREOTYPE') = 'SysML::Blocks::Block'));
	--self.getAppliedStereotypes()->exists(s | s.getQualifiedName() = 'SysML::Blocks::Block');

helper context UML!Element def: isSysMLConstraintBlockStereotyped() : Boolean =
	self.getAppliedStereotypes()->exists(s | s.getQualifiedName() = 'SysML::Constraints::ConstraintBlock');

helper context UML!Element def: isSysMLPortStereotyped() : Boolean =
	self.getAppliedStereotypes()->exists(s |
		let qn : String = s.getQualifiedName() in (
			(qn = 'SysML::PortAndFlows::FlowPort') or
			(qn = 'SysML::DeprecatedElements::FlowPort') or
			(qn = 'SysML::PortAndFlows::FullPort') or
			(qn = 'SysML::PortAndFlows::ProxyPort'))
	);

helper context UML!DataType def: isValueTypeStereotyped() : Boolean = 
	self.getAppliedStereotypes()->exists(s | s.getQualifiedName() = 'SysML::Blocks::ValueType');

Isn't this a valid way to test for stereotypes with ATL?

Thanks,

-- OHM.

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Re: Issue with string comparison in helper... [message #1817682 is a reply to message #1817672]

Wed, 27 November 2019 19:52

Dennis Wagelaar

Messages: 581
Registered: September 2012
Location: Belgium

Senior Member

I've check for applied stereotypes like this before:

helper context UML2!"uml::Classifier" def : isObservable : Boolean =
	not self.getAppliedStereotype('Observer::Observable').oclIsUndefined();

(See https://github.com/dwagelaar/UML2CaseStudies/blob/master/uml2cs-transformations/transformations/UML2Observer.atl#L26)

Cheers,
Dennis

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Re: Issue with string comparison in helper... [message #1817824 is a reply to message #1817682]

Fri, 29 November 2019 18:18

Olivier Hurez-Martin

Messages: 20
Registered: May 2019

Junior Member

That worked... Thank you Dennis!

Out of curiosity: any idea why the expressions in the original post won't work?

Thanks,

-- Olivier.

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