for (final String tagFieldName : tagFieldNames) {
            tagList.addAll(Arrays.asList(getFieldValues(document, tagFieldName)));
        }
        final String[] tags = tagList.toArray(new String[tagList.size()]);
        final String[] roles = getFieldValues(document, roleFieldName);

        for (final String field : fields) {
            final Object textObj = document.get(field);