if (logger.isDebugEnabled()) {
            logger.debug("Send {} to the searchers.", query);
        }
        final int pageSize = params.getPageSize();
        final int startPosition = params.getStartPosition();
        if (startPosition * 2 >= windowSize) {
            int offset = params.getOffset();
            if (offset < 0) {
                offset = 0;
            } else if (offset > windowSize / 2) {

                return null;
            }

            @Override
            public String getSort() {
                return null;
            }

            @Override
            public int getStartPosition() {
                return 0;
            }

            @Override
            public int getOffset() {
                return 0;
            }

            @Override

            ComponentUtil.getQueryHelper().processSearchPreference(searchRequestBuilder, userBean, query);
            return SearchConditionBuilder.builder(searchRequestBuilder).query(query).offset(params.getStartPosition())
                    .size(params.getPageSize()).facetInfo(params.getFacetInfo()).geoInfo(params.getGeoInfo())
                    .highlightInfo(params.getHighlightInfo()).similarDocHash(params.getSimilarDocHash())

    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();
        }
        return start;
    }

    @Override
    public int getOffset() {

    public Map<String, String[]> getFields() {
        return fields;
    }

    @Override
    public Map<String, String[]> getConditions() {
        return as;
    }

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

    @Override
    public int getOffset() {

    public abstract GeoInfo getGeoInfo();

    public abstract FacetInfo getFacetInfo();

    public abstract HighlightInfo getHighlightInfo();

    public abstract String getSort();

    public abstract int getStartPosition();

    public abstract int getPageSize();

    public abstract int getOffset();

    public abstract String[] getExtraQueries();

    public abstract Object getAttribute(String name);

        }

        @Override
        protected SearchResult search(String query, SearchRequestParams params, OptionalThing<FessUserBean> userBean) {
            int start = params.getStartPosition();
            int size = params.getPageSize();
            SearchResultBuilder builder = SearchResult.create();
            for (int i = start; i < start + size && i < allRecordCount; i++) {

        }

        @Override
        public String getSort() {
            return request.getParameter("sort");
        }

        @Override
        public int getStartPosition() {
            if (startPosition != -1) {
                return startPosition;
            }

            final String start = request.getParameter("start");
            if (StringUtil.isBlank(start)) {

        // search log
        if (fessConfig.isSearchLog()) {
            ComponentUtil.getSearchLogHelper().addSearchLog(params, DfTypeUtil.toLocalDateTime(requestedTime), queryId, query,
                    params.getStartPosition(), params.getPageSize(), queryResponseList);
        }

        // favorite
        if (fessConfig.isUserFavorite()) {
            ComponentUtil.getUserInfoHelper().storeQueryId(queryId, documentItems);

                    @Override
                    public int getPageSize() {
                        return 0;
                    }

                    @Override
                    public int getStartPosition() {
                        return 0;
                    }
                };
                params.q = query;
                final SearchRenderData data = new SearchRenderData();