TIP: SysMLv1/UML: Cameo Simulation Toolkit: HOWTO convert an fUML ReadLine CLI String to a Boolean for cleaner DecisionNode tests against a LiteralBoolean [true] guard.

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If you find all that magic detection of variables in Magic Model Analyst® (Cameo Simulation Toolkit®) from "names" within guards on ControlFlow edges outgoing from a DecisionNode a bit mysterious and want to use some basic Boolean logic this might be for you.

A convenient way to explore this in Magic Model Analyst® (Cameo Simulation Toolkit®) is to use the ReadLine Activity from the fUML_Library.mdzip, which you can load via Use Project > Use Local Project then select under <install.root>/modelLibraries. You can then input 'test' values via a CLI in the simulation console.

Rather than using Cameo's "magical" implied variable detection based on a "freestyle" guard, an OpaqueBehavior with this Groovy script is used here to convert from some candidate inputs to a hard Boolean true or false:

List match = ["True", "true", "Yes", "yes", "y", "Y"];
o = (i != null && i != "" && match.any { it.contains(i) })

IMPORTANT: the guard [true] uses a LiteralBoolean true.

For a mini video of it simulated visit:

Compare with using a "magical" implied variable [name] in the guard as shown here:


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