In this concrete case it's not the problem, because AbstractVFSDeploymentContext is a subclass of AbstractDeploymentContext and represents new and proper abstraction. Generally speaking it's the problem in case users use improper abstractions. For example root in our case could be refactored to superclass in the future if AbstractVFSDeploymentContext wouldn't be proper abstraction. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4202150#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...