* @return The facet info.
     */
    protected FacetInfo createFacetInfo(final HttpServletRequest request) {
        final String[] fields = getParamValueArray(request, "facet.field");
        final String[] queries = getParamValueArray(request, "facet.query");
        if (fields.length == 0 && queries.length == 0) {
            return null;
        }
        final FacetInfo facetInfo = new FacetInfo();
        facetInfo.field = fields;

        protected static RequestParameter parse(final HttpServletRequest request) {
            final String query = request.getParameter("q");
            final String[] tags = getParamValueArray(request, "label");
            final String[] fields = getParamValueArray(request, "field");

            final String numStr = request.getParameter("num");
            final int num;