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

            return SearchConditionBuilder.builder(searchRequestBuilder)
                    .query(query)
                    .offset(params.getStartPosition())
                    .size(params.getPageSize())
                    .facetInfo(params.getFacetInfo())
                    .geoInfo(params.getGeoInfo())
                    .highlightInfo(params.getHighlightInfo())

        return fields;
    }

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

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

    @Override

    /**
     * Default constructor for SearchForm.
     */
    public SearchForm() {
        super();
    }

    // advance

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

    @Override

        }

        @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++) {

                return 0;
            }

            @Override
            public int getPageSize() {
                return 10;
            }

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

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

            @Override

     * @return The sort.
     */
    public abstract String getSort();

    /**
     * Returns the start position.
     *
     * @return The start position.
     */
    public abstract int getStartPosition();

    /**
     * Returns the page size.
     *
     * @return The page size.
     */
    public abstract int getPageSize();

    /**
     * Returns the offset.
     *

        }

        @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)) {

            return null;
        }

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

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

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

        @Override