@Override public boolean replaceACE(String aclName, ACE oldACE, ACE newACE) { if (aclName == null) { throw new NullPointerException("'aclName' cannot be null"); } ACL acl = getOrCreateACL(aclName); boolean aclChanged = acl.replace(oldACE, newACE); if (aclChanged) { addACL(acl); } return aclChanged; }