&quot;scott.stark(a)jboss.org&quot; wrote : I'm not sure what the hooks are for introducing an attachment or an annotation on jdk types like javax.management.ObjectName are. ? Something like this: | public <T> void registerMapper(Class<T> clazz, MetaMapper<T> metaMapper) | { | ClassInfo ci = configuration.getClassInfo(clazz); | ci.setAttachment(MetaMapper.class.getName(), metaMapper); | } | | MetaMapper<ObjectName> onMetaMapper = new ObjectNameMetaMapper(); | registerMapper(ObjectName.class, onMetaMapper); | You only need to be careful for transient ClassInfos, since it's all weak (value) hash map in the background. But for jdk classes this should stick in there forever. :-) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4191493#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...