Greetings,

I’m attaching a DataChangeListener to a variable node in a generated code class. The changeHandler is properly called upon a change, yet it returns values of the class StructureDataValue.ToRoot instead of, in this case, a simple UInt32. This makes validation or accessing the values in a typed manner a bit difficult (even though in my case the “intValue()” conversion works).

Is there a way to extract the “original” DataValue from the change listener, including the correct type?

One more general question relating to the use of the DataChange listener (or some other construct): is there any way I can perform validation of the to-be written values and eventually return a BAD status code without having to implement an IOManager?
== Answer to myself after some more testing: the changeListener seems to be called before the new value is applied. Thus throwing a StatusException will prevent the write.

Thanks,
Hans-Uwe