Jung into Eclipse RCP

Hello,

I am currently creating a Eclipse RCP application using JUNG. The idea is to display a graph and to display the properties of each node of a graph in another view. I suppose that we must use the selection listener and selection provider mechanism. However, as I am quite new to Java, I am wondering how we can build a selection provider (ISelectionProvider) on the graph so that the other view can react properly. I suppose that I need to fill the methods for a new type of ISelectionProvider that is special for the graph... but I don't really know how to do it. Can you give me some hints ?

C.

class GraphSelectionProvider implements ISelectionProvider {

        @Override
        public void addSelectionChangedListener(ISelectionChangedListener listener) {
                          // ??
           
        }

        @Override
        public ISelection getSelection() {
                          // ??
            return null ;
        }

        @Override
        public void removeSelectionChangedListener( ISelectionChangedListener listener) {
                          // ??
        }

        @Override
        public void setSelection(ISelection selection) {
                          // ??            
        }
       
    }