final SearchRequestBuilder builder = client.prepareSearch(index);
        builder.setSize(size);
        builder.setQuery(buildQuery());
        builder.setRescorer(buildRescore(), windowSize);

        builder.execute(new ActionListener<SearchResponse>() {
            @Override

        if (map != null) {
            return map;
        }
        return Collections.emptyMap();
    }

    public void buildQuery(final List<String> keywordList, final List<FilterFunctionBuilder> list) {
        final String key = ComponentUtil.getVirtualHostHelper().getVirtualHostKey();
        keywordList.stream().forEach(keyword -> {