.getHits()
                .getTotalHits()
                .value() > 0);
        assertTrue(fesenClient.prepareSearch("fess_crawler.queue")
                .setQuery(QueryBuilders.termQuery("sessionId", "id2"))
                .execute()
                .actionGet()
                .getHits()
                .getTotalHits()
                .value() > 0);

        urlQueueService.delete("id1");

            final List<String> list = new ArrayList<>();
            list.add(value.toString());
            return list;
        }
        if (value instanceof List) {
            return (List<String>) value;
        }
        throw new IllegalArgumentException("The value should be String or List, but " + value.getClass());
    }

    /**

     */
    default void initialize() {
        final StringBuilder buf = new StringBuilder(100);
        final String value = System.getProperty("java.protocol.handler.pkgs");
        if (StringUtil.isEmpty(value)) {
            buf.append("org.codelibs.fess.net.protocol");
        } else if (!value.contains("org.codelibs.fess.net.protocol")) {
            buf.append("|org.codelibs.fess.net.protocol");
        }

        if (StringUtil.isNotEmpty(path)) {
            final String[] values = path.split("/", 2);
            if (values.length == 2) {
                return values;
            }
            if (values.length == 1 && StringUtil.isNotEmpty(values[0])) {
                return new String[] { values[0], StringUtil.EMPTY };
            }
        }

            final String value = info.getCustomMetadataValue(key);
            addMetadata(extractData, key, value);
        }
    }

    /**
     * Adds metadata to the extraction data if the value is not null.
     * @param extractData the extraction data
     * @param name the metadata name
     * @param value the metadata value
     */

    /** The maximum number of times to check for active threads. */
    protected int maxThreadCheckCount = 20;

    /** The maximum depth for crawling. A value of -1 indicates no depth check. */
    protected int maxDepth = -1;

    /** The maximum number of URLs to access. A value of 0 indicates no limit. */
    protected long maxAccessCount = 0;

    /**
     * Returns the session ID.
     * @return The session ID.
     */

     *
     * @param name The property name
     * @param value The property value
     */
    public void addHttpClientProperty(final String name, final Object value) {
        if (StringUtil.isNotBlank(name) && value != null) {
            httpClientPropertyMap.put(name, value);
        }
    }

    /**
     * Processes robots.txt for the given URL.

        String actual;
        String value;

        value = "hoge.txt";
        expected = "hoge.txt";
        actual = extractor.getFileName(value);
        assertEquals(expected, actual);

        value = "/hoge.txt";
        expected = "hoge.txt";
        actual = extractor.getFileName(value);
        assertEquals(expected, actual);

        value = "fuga/hoge.txt";
        expected = "hoge.txt";

        if (synonymLoader.getSynonymMap() == null) {
            if (settings.getAsList("synonyms", null) != null) {
                logger.warn("synonyms values are empty.");
            } else if (settings.get("synonyms_path") != null) {
                logger.warn("synonyms_path[{}] is empty.", settings.get("synonyms_path"));
            } else {

         *
         * @param value The Date object to convert.
         * @return The ISO 8601 formatted date string, or null if value is not a Date.
         */
        @Override
        public String getAsString(final Object value) {
            if (value instanceof Date) {
                return DEFAULT_DATE_PRINTER.print(((Date) value).getTime());
            }
            return null;
        }