Pipe and Chains!

gistfile1.swift

    func getOrElse<S>(f : @auto_closure () -> S)(a : S?) -> S {
        if let r = a {
            return r
        }
        else {
            return f()
        }
    }
    
    
   
    class func allRootElementsOfType(document : UmlDocument, type : String) -> Array<ModelElementNode> {
        return
            document.project?.profile?.modelNode?.childNodes
            |> getOrElse (Array())
            |> filter {$0.elementType == type}
        
    }
    
    class func allStereotypes(document : UmlDocument) -> Array<ModelElementNode> {
        return allRootElementsOfType(document, type: "sterotype")
    }