ILabelProvider labelProvider = new ObservableMapLabelProvider(labelMaps) {
      public String getText(Object element) {
        return firstNames.get(element) + " " + lastNames.get(element);
      }
    };

    viewer.setLabelProvider(labelProvider);

public class TableViewerPart {
	private List<MyOwnObject> objects;
	
	//Table Viewer is populated with these objects...
        //Databinding objects
}

public class FormEditorPart {
	@Inject
	void setSelection(@Optional @Named(IServiceConstants.ACTIVE_SELECTION) MyOwnObject object) {
		// Populate text boxes based on selection
	}
	
	// Update button pressed - update the object
}

void setSelection(@Optional @Named(IServiceConstants.ACTIVE_SELECTION) MyOwnObject object) {
		// Populate text boxes based on selection
	}