final FTPClient client, final FtpInfo ftpInfo, final FTPFile file) {
        if (file == null) {
            responseData.setHttpStatusCode(Constants.NOT_FOUND_STATUS_CODE);
            responseData.setCharSet(charset);
            responseData.setContentLength(0);
            ftpClientQueue.offer(client);
            return;
        }

        if (file.isSymbolicLink()) {

            }

            if (file == null) {
                responseData.setHttpStatusCode(Constants.NOT_FOUND_STATUS_CODE);
                responseData.setCharSet(charset);
                responseData.setContentLength(0);
            } else if (file.isFile()) {
                // check file size
                responseData.setContentLength(file.length());

        final byte[] data = new String("xyz").getBytes();
        final ResponseData responseData = new ResponseData();
        responseData.setUrl("file:/test.txt");
        responseData.setCharSet(Constants.UTF_8);
        responseData.setResponseBody(data);
        responseData.setMimeType("text/plain");
        final ResultData resultData = textTransformer.transform(responseData);

        }

        try {
            if (file == null) {
                responseData.setHttpStatusCode(Constants.NOT_FOUND_STATUS_CODE);
                responseData.setCharSet(charset);
                responseData.setContentLength(0);
            } else if (file.isFile()) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Checking SmbFile Size: {}", filePath);

        final ResponseData responseData = new ResponseData();
        responseData.setUrl("http://hoge/");
        responseData.setResponseBody(data);
        responseData.setCharSet("ISO-8859-1");
        final ResultData resultData = htmlTransformer.transform(responseData);
        assertEquals("xyz", new String(resultData.getData()));
    }

    public void test_transform_filelink() {

        }

        try {
            if (file == null) {
                responseData.setHttpStatusCode(Constants.NOT_FOUND_STATUS_CODE);
                responseData.setCharSet(charset);
                responseData.setContentLength(0);
            } else if (file.isFile()) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Checking SmbFile Size: {}", filePath);

                if (defaultEncoding == null) {
                    responseData.setCharSet(Constants.UTF_8);
                } else if (responseData.getCharSet() == null) {
                    responseData.setCharSet(defaultEncoding);
                }
            } else {
                responseData.setCharSet(encoding.trim());
            }

            if (!isSupportedCharset(responseData.getCharSet())) {

            responseData.setContentLength(statObject.size());
            checkMaxContentLength(responseData);

            responseData.setHttpStatusCode(Constants.OK_STATUS_CODE);
            responseData.setCharSet(getCharset());
            responseData.setLastModified(statObject.lastModified() == null ? null : Date.from(statObject.lastModified().toInstant()));
            responseData.setMimeType(statObject.contentType());

        this.responseBodyFile = responseBody;
        this.isTemporaryFile = isTemporary;
    }

    public String getCharSet() {
        return charSet;
    }

    public void setCharSet(final String charSet) {
        this.charSet = charSet;
    }

    public long getContentLength() {
        return contentLength;
    }

    public void setContentLength(final long contentLength) {

     */
    @Override
    public InputStream transform(InputStream original) {
        try {
            return ReaderInputStream.builder().setCharset(charset).setReader(transform(new InputStreamReader(original, charset))).get();
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }

    public boolean hasFilters() {