protected abstract BiMap<String, String> create(Entry<String, String>[] entries);

  @Override
  @SuppressWarnings("unchecked")
  public final Entry<String, String>[] createArray(int length) {
    return (Entry<String, String>[]) new Entry<?, ?>[length];
  }

  @Override
  public final String[] createKeyArray(int length) {
    return new String[length];
  }

  @Override
  public final String[] createValueArray(int length) {

  protected abstract BiMap<String, String> create(Entry<String, String>[] entries);

  @Override
  @SuppressWarnings("unchecked")
  public final Entry<String, String>[] createArray(int length) {
    return (Entry<String, String>[]) new Entry<?, ?>[length];
  }

  @Override
  public final String[] createKeyArray(int length) {
    return new String[length];
  }

  @Override
  public final String[] createValueArray(int length) {

     * @return stream of tag-attribute pairs for URL extraction
     */
    @Override
    protected Stream<Pair<String, String>> getChildUrlRules(final ResponseData responseData, final ResultData resultData) {
        final Map<String, String> configMap = getConfigPrameterMap(responseData, ConfigName.CONFIG);
        final String ruleString = configMap.get(Config.HTML_CHILD_URL_RULES);
        if (StringUtil.isBlank(ruleString)) {

        querySet.add("BBB");

        document.put("title", "111AaA222bbb");
        assertEquals("111<strong>AaA</strong>222<strong>bbb</strong>", viewHelper.getContentTitle(document));

        querySet.add("on");
        document.put("title", "on 111 strong on aaaa");

        assertNull(user.getName());

        // Test with special characters in name
        user = new TestFessUser("******@****.***", new String[] {}, new String[] {}, new String[] {});
        assertEquals("******@****.***", user.getName());

        // Test with Unicode characters
        user = new TestFessUser("ユーザー名", new String[] {}, new String[] {}, new String[] {});

     * The input object can be either a single string or a list of strings representing URLs.
     *
     * @param obj the object containing anchor URLs (String or List of Strings)
     * @return a set of RequestData objects for the anchor URLs, or null if no valid URLs found
     */
    protected Set<RequestData> getAnchorSet(final Object obj) {
        List<String> anchorList;
        if (obj instanceof final String s) {

    private SearchEngineClient searchEngineClient;
    private FessConfig fessConfig;

    private boolean deleteByQueryCalled;
    private String deleteIndex;
    private QueryBuilder deleteQuery;
    private String expiresFieldName;
    private String documentUpdateIndex;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        purgeDocJob = new PurgeDocJob();

     * @throws PACDecodingException if validation fails
     */
    public String check(final String string) throws PACDecodingException {
        if (this.pointer == 0 && string != null) {
            throw new PACDecodingException("Non-empty string");
        }

        final int expected = this.length / 2;
        if (string.length() != expected) {

    static Builder builder(
            @Nonnull String command,
            @Nonnull String commandName,
            @Nonnull List<String> args,
            @Nonnull MessageBuilderFactory messageBuilderFactory) {
        return new Builder(command, commandName, args, messageBuilderFactory);
    }

    class Builder {
        private final String command;
        private final String commandName;

  @Override
  public Queue<String> create(Object... elements) {
    String[] array = new String[elements.length];
    int i = 0;
    for (Object e : elements) {
      array[i++] = (String) e;
    }
    return create(array);
  }

  protected abstract Queue<String> create(String[] elements);

  @Override
  public String[] createArray(int length) {
    return new String[length];
  }