charMappingList.setPageRangeSize(fessConfig.getPagingPageRangeSizeAsInteger());
            charMappingPager.setPageNumberList(charMappingList.createPageNumberList());

            return (List<CharMappingItem>) charMappingList;
        }).orElse(Collections.emptyList());
    }

    public OptionalEntity<CharMappingFile> getCharMappingFile(final String dictId) {