try {
            if (highlightFields != null) {
                highlightFields.values().stream().forEach(highlightField -> {
                    final String text = viewHelper.createHighlightText(highlightField);
                    if (text != null) {
                        docMap.put(hlPrefix + highlightField.getName(), text);
                    }
                });

            });
        } catch (final ExecutionException e) {
            throw new FessSystemException("Cannot load facet from cache.", e);
        }
    }

    public String createHighlightText(final HighlightField highlightField) {
        final Text[] fragments = highlightField.fragments();
        if (fragments != null && fragments.length != 0) {
            final String[] texts = new String[fragments.length];