final String logFilePath = systemHelper.getLogFilePath();
        if (StringUtil.isNotBlank(logFilePath)) {
            final Path logDirPath = Paths.get(logFilePath);
            try (Stream<Path> stream = Files.list(logDirPath)) {
                stream.filter(entry -> isLogFilename(entry.getFileName().toString())).sorted().forEach(filePath -> {
                    final Map<String, Object> map = new HashMap<>();

		return nil, io.EOF
	}

	var kvs jstream.KVS
	if v.ValueType == jstream.Object {
		// This is a JSON object type (that preserves key
		// order)
		kvs, _ = v.Value.(jstream.KVS)
	} else {
		// To be AWS S3 compatible Select for JSON needs to
		// output non-object JSON as single column value
		// i.e. a map with `_1` as key and value as the
		// non-object.
		kvs = jstream.KVS{jstream.KV{Key: "_1", Value: v.Value}}
	}

     */
    public boolean hasOpenSearchFile() {
        return osddFile != null;
    }

    /**
     * Returns the OSDD as a stream response.
     *
     * @return the stream response
     */
    public StreamResponse asStream() {
        if (osddFile == null) {
            throw ComponentUtil.getResponseManager().new404("Unsupported Open Search Description Document response.");
        }

    /**
     * Returns the OSDD document.
     *
     * @return the OSDD document as a stream response
     */
    @Execute
    public ActionResponse index() {
        if (isLoginRequired()) {
            return redirectToLogin();
        }
        return osddHelper.asStream();
    }

        if (StringUtil.isNotBlank(logFilePath) && isLogFilename(filename)) {
            final Path path = Paths.get(logFilePath, filename);
            return asStream(filename).contentTypeOctetStream().stream(out -> {
                try (InputStream in = Files.newInputStream(path)) {
                    out.write(in);
                }
            });
        }

  private @Nullable InputStream in;

  /**
   * Creates a new instance.
   *
   * @param it an iterator of I/O suppliers that will provide each substream
   */
  public MultiInputStream(Iterator<? extends ByteSource> it) throws IOException {
    this.it = checkNotNull(it);
    advance();
  }

  @Override
  public void close() throws IOException {
    if (in != null) {
      try {
        in.close();
      } finally {

     *
     * @param body download parameters
     * @return stream response containing the CSV file
     */
    @Execute
    public StreamResponse get$download(final DownloadBody body) {
        validateApi(body, messages -> {});
        return asStream("elevate.csv").contentTypeOctetStream().stream(out -> {

        return parseContext;
    }

    /**
     * Returns an input stream from a deferred file output stream.
     *
     * @param dfos A deferred file output stream.
     * @return An input stream.
     * @throws IOException if an I/O error occurs.
     */
    protected InputStream getContentStream(final DeferredFileOutputStream dfos) throws IOException {

        validateApi(body, messages -> {});
        return kuromojiService.getKuromojiFile(body.dictId)
                .map(file -> asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
                    file.writeOut(out);
                }))
                .orElseGet(() -> {
                    throwValidationErrorApi(messages -> messages.addErrorsFailedToDownloadProtwordsFile(GLOBAL));

        validateApi(body, messages -> {});
        return protwordsService.getProtwordsFile(body.dictId)
                .map(file -> asStream(new File(file.getPath()).getName()).contentTypeOctetStream().stream(out -> {
                    file.writeOut(out);
                }))
                .orElseGet(() -> {
                    throwValidationErrorApi(messages -> messages.addErrorsFailedToDownloadProtwordsFile(GLOBAL));