public int getPageSize() {
            if (pageSize != -1) {
                return pageSize;
            }

            final String num = request.getParameter("num");
            if (StringUtil.isBlank(num)) {
                pageSize = fessConfig.getPagingSearchPageSizeAsInteger();
            } else {
                try {
                    pageSize = Integer.parseInt(num);

        public ChatSearchRequestParams(final String query, final int pageSize, final FessConfig fessConfig) {
            this(query, pageSize, fessConfig, Collections.emptyMap(), new String[0]);
        }

        /**
         * Creates new chat search request parameters with filter support.
         *
         * @param query the search query
         * @param pageSize the page size
         * @param fessConfig the Fess configuration