"epbernard" wrote : | Correct, I think Max's train of thoughts goes down to: could the VFS implement openStream() is such a way that it would look like a JAR stream? When I wrote the visitor, this was really the "common interface" I expected URLs I interact with to implement. | No, because this requires every protocol handler to conform to this contract. How does the PersistenceUnitInfo.getJarFileUrls() work with other vendors when the deployment is unpacked? For a url pointing to an actual jar, JarInputStream(vf.openStream) should work regardless of the protocol. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4109075#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...