Robert Brodt Messages: 811 Registered: August 2010 Location: Colorado Springs, CO
Yes, there are many examples in the sample runtime and jbpm5 extension plugins.
You need define a ExtendedPropertiesAdapter<> for your objects, and then implement the getChoiceOfValues() method. Take a look at the DataAssociationPropertiesAdapter class to get you started. This class builds a list of in-scope Property objects ("variables") for presentation by the UI.