final Settings settings) {
        super(indexSettings, name, settings);

        final List<String> tagList = Analysis.parseWordList(environment, settings, "tags", s -> s);
        if (tagList != null) {
            posTags.addAll(tagList);
        }
    }

    @Override
    public TokenStream create(final TokenStream tokenStream) {

    public KuromojiPartOfSpeechFilterFactory(IndexSettings indexSettings, Environment env, String name, Settings settings) {
        super(indexSettings, name, settings);
        List<String> wordList = Analysis.parseWordList(env, settings, "stoptags", s -> s);
        if (wordList != null) {
            stopTags.addAll(wordList);
        } else {
            stopTags.addAll(JapaneseAnalyzer.getDefaultStopTags());
        }
    }

            final Settings settings) {
        super(indexSettings, name, settings);

        final List<String> wordList = Analysis.parseWordList(environment, settings, "stopwords", s -> s);
        if (wordList != null) {
            stopwords = wordList.toArray(new String[wordList.size()]);
        } else {
            stopwords = new String[0];
        }

            final Settings settings) {
        super(indexSettings, name, settings);

        final List<String> wordList = Analysis.parseWordList(environment, settings, "stopwords", s -> s);
        if (wordList != null) {
            stopwords = wordList.toArray(new String[wordList.size()]);
        } else {
            stopwords = new String[0];
        }

        }
        try {
            Set<String> dup = new HashSet<>();
            List<String> ruleList =
                    Analysis.parseWordList(env, settings, USER_DICT_PATH_OPTION, USER_DICT_RULES_OPTION, s -> parse(s, dup));
            if (ruleList == null || ruleList.isEmpty()) {
                return null;
            }

        }

        Reader reader = null;
        if (settings.getAsList("synonyms", null) != null) {
            final List<String> rules = Analysis.parseWordList(env, settings, "synonyms", s -> s);
            final StringBuilder sb = new StringBuilder();
            for (final String line : rules) {
                sb.append(line).append(System.getProperty("line.separator"));