br.addItem("Advice");
        br.addElement("Against for JVN14876762.");
        br.addElement("Boundary size is limited by Framework.");
        br.addElement("Too long boundary is treated as 404 because it's thought of as attack.");
        br.addElement("");
        br.addElement("While, you can override the boundary limit size");
        br.addElement(" in " + FessMultipartRequestHandler.class.getSimpleName() + ".");

    /** The key of the configuration. e.g. true */
    String QUERY_TIMEOUT_LOGGING = "query.timeout.logging";

    /** The key of the configuration. e.g. 10000 */
    String QUERY_TRACK_TOTAL_HITS = "query.track.total.hits";

    /** The key of the configuration. e.g. location */
    String QUERY_GEO_FIELDS = "query.geo.fields";

    /** The key of the configuration. e.g. browser_lang */

    public static final String FESS_VAR_PATH = "fess.var.path";

    public static final String FESS_LOG_LEVEL = "fess.log.level";

    public static final String TRACK_TOTAL_HITS = "track_total_hits";

    public static final String SYSTEM_PROP_PREFIX = "fess.system.";

    public static final String FESS_CONFIG_PREFIX = "fess.config.";

            this.request = request;
            this.fessConfig = fessConfig;
        }

        @Override
        public String getTrackTotalHits() {
            return request.getParameter(Constants.TRACK_TOTAL_HITS);
        }

        @Override
        public String getQuery() {
            return request.getParameter("q");
        }

        @Override
        public String[] getExtraQueries() {

    String QUERY_HIGHLIGHT_TERMINAL_CHARS = "queryHighlightTerminalChars";

    String QUERY_HIGHLIGHT_BOUNDARY_CHARS = "queryHighlightBoundaryChars";

    String QUERY_TRACK_TOTAL_HITS_VALUE = "queryTrackTotalHitsValue";

    String CORS_ALLOW_ORIGIN = "CorsAllowOrigin";

    String API_DASHBOARD_RESPONSE_HEADER_LIST = "apiDashboardResponseHeaderList";

    @ValidateTypeFailure
    public Integer offset;

    @ValidateTypeFailure
    public Integer pn;

    @Size(max = 1000)
    public String sdh;

    @Size(max = 100)
    public String track_total_hits;

    // advance

    @Override
    public int getStartPosition() {
        if (start == null) {
            start = ComponentUtil.getFessConfig().getPagingSearchPageStartAsInteger();
        }