(ROSE) REI checking for existance

[sven biebaut]

hello all,

Can anyone tell me how to check for the validity of a property in a
script, f.i. when a REI method returns a class and that class is not
necessarily there in the model, how do i check this ?

Example :

    Sub ProcessStateMachine (aStateMachine As StateMachine)
    End Sub

    Sub ProcessClass(aClass As Class)
       ProcessStateMachine aClass.StateMachine
    End Sub

    Sub Main
       For i% = 1 To RoseApp.CurrentModel.GetAllClasses().Count
        ProcessClass RoseApp.CurrentModel.GetAllClasses().GetAt(i%)
       Next i%
    End Sub

Here i ask for the statemachine of a class, but not all classes have
one. How can i check that i only call processStateMachine on an existing
StateMachine.

I tried the other way round, but there is no such thing as a
'getallstatemachines' on a rosemodel.

Thanks in advance,

Sven Biebaut

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