if (isTargetUser(username) && StringUtil.isNotBlank(password)) {
            return executeCommand(updateCommand, username, password) == 0;
        }
        return true;
    }

    @Override
    public User load(final User user) {
        return user;
    }

    /**
     * Default constructor for CommandChain.
     */
    public CommandChain() {

        assertEquals("mail.smtp.server.main.host.and.port", FessEnv.MAIL_SMTP_SERVER_MAIN_HOST_AND_PORT);
        assertEquals("mail.subject.test.prefix", FessEnv.MAIL_SUBJECT_TEST_PREFIX);
        assertEquals("mail.return.path", FessEnv.MAIL_RETURN_PATH);
    }

    // Test default values
    public void xtest_defaultValues() { // Disabled due to initialization issues
        // Test getLastaDiSmartDeployMode

        File f = new File(getBasedir(), path);

        f.createNewFile();

        return artifactRepositoryFactory.createArtifactRepository(
                "test", "file://" + f.getPath(), repoLayout, null, null);
    }

    protected String getRepositoryLayout() {
        return "default";
    }

    protected ArtifactRepository localRepository() throws Exception {

        return () -> new ArrayIterator<>(items);
    }

    /**
     * Creates an {@link ArrayIterator}.
     *
     * @param items the array of elements to iterate (must not be {@literal null})
     */
    public ArrayIterator(final T... items) {
        this.items = items;
    }

    @Override
    public boolean hasNext() {
        return index < items.length;
    }

          stack.addLast(expand(child));
        } else {
          stack.removeLast();
          return top.root;
        }
      }
      return endOfData();
    }

    private PostOrderNode<T> expand(T t) {
      return new PostOrderNode<>(t, children(t).iterator());
    }
  }

  /**
   * Returns an unmodifiable iterable over the nodes in a tree structure, using breadth-first

            }

            log.debug("Using mirror: " + mirror.getUrl() + " (id: " + id + ")");

            repository = artifactRepositoryFactory.createArtifactRepository(
                    id, mirror.getUrl(), repository.getLayout(), repository.getSnapshots(), repository.getReleases());
        }
        return repository;
    }

        gen.generateBytes(derived, 0, 16);
        return derived;
    }

    /**
     * @param string
     * @return null terminated ASCII bytes
     */
    private static byte[] toCBytes(final String string) {
        final byte[] data = new byte[string.length() + 1];
        System.arraycopy(string.getBytes(StandardCharsets.US_ASCII), 0, data, 0, string.length());
        return data;
    }

                    }
                    return result;
                default:
                    return 0;
            }
        }

        public StringItem getStringPart() {
            return stringPart;
        }

        public Item getDigitPart() {
            return digitPart;
        }

        @Override
        public int getType() {
            return COMBINATION_ITEM;
        }

         * @param status The status to set.
         * @return This ApiResponse instance.
         */
        public ApiResponse status(final Status status) {
            this.status = status.getId();
            return this;
        }

        /**
         * Returns a new ApiResult instance with this ApiResponse.
         * @return A new ApiResult instance.
         */
        public ApiResult result() {

    /**
     * Generate the access token.
     * @return The access token.
     */
    public String generateAccessToken() {
        return RandomStringUtils.random(ComponentUtil.getFessConfig().getApiAccessTokenLengthAsInteger(), 0, 0, true, true, null, random);
    }

    /**
     * Get the access token from the request.
     * @param request The request.
     * @return The access token.
     */