I have a hierarchal data structure (Machine, Component, Measurement, Fault are classes) displayed in a TreeViewer. I have added SelectionChanged and DoubleClick listeners, but can't find a way to get to the data stored in the selected instance of the data structure class. For example, the selection is a Measurement which has a String name field. I can see the data in the Element in Debug-Variables, but I can't find any getters to access it. I tried casting the selection as a Measurement but it is an ISelection, or TreeSelection class and it won't accept the cast.
It seems there should be get methods to access the data in the selection, but there aren't, so I'm must be missing something fundamental.