*
     * @param input the input object (String[], List, or String)
     * @return joined string with elements separated by spaces, or empty string if invalid input
     */
    public static String join(final Object input) {
        String[] values = null;
        if (input instanceof String[]) {
            values = (String[]) input;
        } else if (input instanceof List) {

     * @return a list of extracted URLs
     * @deprecated Use {@link #getUrlFromTagAttribute(URI, Document, String, String, String)} instead.
     */
    @Deprecated
    protected List<String> getUrlFromTagAttribute(final URL url, final Document document, final String xpath, final String attr,
            final String encoding) {
        try {
            return getUrlFromTagAttribute(url.toURI(), document, xpath, attr, encoding);

    @Override
    protected CrawlerClient getClient(final String url) {
        final CrawlingConfigHelper crawlingConfigHelper = ComponentUtil.getCrawlingConfigHelper();
        final CrawlingConfig crawlingConfig = crawlingConfigHelper.get(crawlerContext.getSessionId());
        final Map<String, String> clientConfigMap = crawlingConfig.getConfigParameterMap(ConfigName.CLIENT);
        final String value = clientConfigMap.get(CRAWLER_CLIENTS);

    protected static final String ID_TOKEN = "id_token";

    /** OAuth2 authorization code parameter name. */
    protected static final String CODE = "code";

    /** Timeout for token acquisition in milliseconds. */
    protected long acquisitionTimeout = 30 * 1000L;

    /** Cache for storing group information to reduce API calls. */
    protected Cache<String, Pair<String[], String[]>> groupCache;

     *
     * @param session the HTTP session
     * @return the result document IDs cache map
     */
    private Map<String, String[]> getResultDocIdsCache(final HttpSession session) {
        @SuppressWarnings("unchecked")
        Map<String, String[]> resultDocIdsCache = (Map<String, String[]>) session.getAttribute(Constants.RESULT_DOC_ID_CACHE);
        if (resultDocIdsCache == null) {

     */
    @Override
    protected void addChildUrlFromTagAttribute(final List<String> urlList, final URI uri, final String attrValue, final String encoding) {
        final String urlValue = attrValue.trim();
        String u = null;
        try {
            final String resolveTarget = urlValue.startsWith(":") ? uri.getScheme() + urlValue : urlValue;

        }
        // TODO Long, Integer, String supported only.
        if (StringUtil.isNotBlank(crawlingInfoPager.sessionId)) {
            cb.query().setSessionId_Match(crawlingInfoPager.sessionId);
        }
        cb.query().addOrderBy_CreatedTime_Desc();
    }

    /**
     * Sets up the conditions for storing a crawling information record.

    private static final String LDAP_MANAGER = "ldapManager";

    private static final String ROLE_QUERY_HELPER = "roleQueryHelper";

    private static final String SUGGEST_HELPER = "suggestHelper";

    private static final String SEARCH_ENGINE_CLIENT = "searchEngineClient";

    private static final String DICTIONARY_MANAGER = "dictionaryManager";

                                    if (pair.size() == 2 && pair.get(0) instanceof String name
                                            && pair.get(1) instanceof List<?> valueList) {
                                        final String[] values =
                                                valueList.stream().filter(v -> v instanceof String).toArray(n -> new String[n]);

    public Artifact getArtifactFromFileName(final ArtifactType artifactType, final String filename, final String url) {
        final String baseName = StringUtils.removeEndIgnoreCase(filename, ".jar");
        final List<String> nameList = new ArrayList<>();
        final List<String> versionList = new ArrayList<>();
        boolean isName = true;
        for (final String value : baseName.split("-")) {