public JaasAcl readAcl(Element elem) throws IOException {
JaasGroupAcl acl = (JaasGroupAcl)super.readAcl(elem);
Element domainElem = elem.getChild("domain");
GroupDomain domain;
if (domainElem == null)
domain = new AclGroupDomain();
else
domain = domainSerializer.readGroupDomain(domainElem);