Error page exception handling

    ServerException serverException;

    if (exception == null || !ServerException.class.isInstance(exception)) {
        serverException = new ServerException(ServerExceptionType.GENERIC);
    } else {
        serverException = (ServerException) exception;

        if (!serverException.shouldHaveLocalization())
            serverException = new ServerException(ServerExceptionType.GENERIC);
    }

    Locale locale = MessageUtils.getCurrentLocale(request);
    String title = serverException.getTitle(locale);
    String message = serverException.getMessage(locale);