Get values from OsmPrimitive

[Oliver Raupach]

Hi,

I am the developer of the HouseNumberTaggingTool. I haven't done 
anything to the plugin for a very very long time and now I want to 
rework some things. So I'm not so familiar with JOSM at the moment. So 
here's a question: I get an OsmPrimitive from the user's selection when 
the plugin is called. How do I get the values for e.g. addr:city or 
addr:street from this OsmPrimitive ?

Oliver Raupach