@SuppressWarnings("unchecked")
        final Set<String> highlightQueries = (Set<String>) params.getAttribute(Constants.HIGHLIGHT_QUERIES);
        if (highlightQueries != null) {
            final StringBuilder buf = new StringBuilder(100);
            highlightQueries.stream().forEach(q -> {
                buf.append("&hq=").append(LaFunctions.u(q));
            });

    public static final String SSO_TYPE_PROPERTY = "sso.type";

    public static final String REQUEST_QUERIES = "fess.Queries";

    public static final String HIGHLIGHT_QUERIES = "fess.HighlightQueries";

    public static final String FIELD_LOGS = "fess.FieldLogs";

    public static final String DEFAULT_DATETIME_FORMAT = "yyyy-MM-dd'T'HH:mm:ss";