// redirect to index page
            form.q = null;
            return redirectToRoot();
        }

        try {
            buildFormParams(form);
            form.lang = searchHelper.getLanguages(request, form);
            final WebRenderData renderData = new WebRenderData();
            searchHelper.search(form, renderData, getUserBean());

     * label filtering, and sort order based on user preferences and configuration.
     *
     * @param form the search form to populate with parameters
     */
    protected void buildFormParams(final SearchForm form) {

        final HttpSession session = request.getSession(false);
        if (session != null) {
            final Object resultsPerPage = session.getAttribute(Constants.RESULTS_PER_PAGE);