Coverity, Dereference after null check (Elytron subsystem)

        boolean providerFound = defaultPolicy == null;

        while (reader.hasNext() && reader.nextTag() != END_ELEMENT) {
            verifyNamespace(reader);
            String localName = reader.getLocalName();
            switch (localName) {
                // Permission Mapper
                case JACC_POLICY:
                    providerFound = defaultPolicy.equals(parseJaccPolicy(addPolicy, reader, operations)) || providerFound;
                    break;
                case CUSTOM_POLICY:
                    providerFound = defaultPolicy.equals(parseCustomPolicy(addPolicy, reader, operations)) || providerFound;
                    break;
                default:
                    throw unexpectedElement(reader);
            }
        }