&quot;scott.stark(a)jboss.org&quot; wrote : | Where is this getType used to build the callback signature? Nowhere. ;-) You're gonna use it. e.g. | public class ICFHolder | { | private Map<Class, ICF> ifcs = new HashMap(); | | public void addICF(ICF icf) | { | icfs.put(icf.getType(), icf); | } | | ... | } | Where callback would be on the addICF/removeICF. getType is only there if you want to keep your map, to know by the ICF::type which ICF to use on attachment. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4186082#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...