THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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The Internal class referenced above will be instantiated, and its lookup function called with the namespace and name from functionQName object. If it returns null, we'll throw an error, otherwise we'll use Reflection API to query for the parameter type, return type and to find the evaluate function. The below implementation can also be distributed
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val functionClass = functionClassObject.getClass
// infer argument types; this implementation supports overloading evaluate function
val pTypes = argumentsFromDpath.map { o => o.getClass() }
val fEvaluate = functionClass.getMethods.find { p =>
p.getName == "evaluate" && p.getParameterTypes.sameElements(pTypes)
}
val dResultType = NodeInfo.fromObject(fEvaluate.getReturnType)
val dArgTypes = fEvaluate.getParameterType.map { NodeInfo.fromObject } |
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