*
     * @return the character set, or null if not specified
     */
    public String getCharSet() {
        return charSet;
    }

    /**
     * Sets the character set of the response.
     *
     * @param charSet the character set to set
     */
    public void setCharSet(final String charSet) {
        this.charSet = charSet;
    }

    /**

     * @param responseData the response data
     */
    protected void writeFileName(final StreamResponse response, final ResponseData responseData) {
        String charset = responseData.getCharSet();
        if (charset == null) {
            charset = Constants.UTF_8;
        }
        final String name;
        final String url = responseData.getUrl();
        final int pos = url.lastIndexOf('/');

        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);

        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() {

                + "</doc>";

        final ResponseData responseData = new ResponseData();
        responseData.setResponseBody(ResourceUtil.getResourceAsFile("extractor/test.xml"), false);
        responseData.setCharSet(Constants.UTF_8);
        final ResultData resultData = xmlTransformer.transform(responseData);
        assertEquals(result, new String(resultData.getData(), Constants.UTF_8));
    }

        final ResponseData responseData = new ResponseData();
        responseData.setUrl("http://www.example.com/submit?a=1&b=2");
        responseData.setResponseBody(data);
        responseData.setCharSet("UTF-8");
        setBaseDir();
        final ResultData resultData = fileTransformer.transform(responseData);
        assertEquals("http_CLN_/www.example.com/submit_QUEST_a=1_AMP_b=2", new String(resultData.getData(), "UTF-8"));

        final HttpPost httpPost = new HttpPost(url);
        final HttpEntity postEntity = MultipartEntityBuilder.create()
                .setMode(HttpMultipartMode.BROWSER_COMPATIBLE)
                .setCharset(Charset.forName("UTF-8"))
                .addBinaryBody("filedata", in)
                .build();
        httpPost.setEntity(postEntity);

        try (CloseableHttpResponse response = httpClient.execute(httpPost)) {

            StandardJavadocDocletOptions options = (StandardJavadocDocletOptions) task.getOptions();
            options.setEncoding("utf-8");
            options.setDocEncoding("utf-8");
            options.setCharSet("utf-8");

            options.addBooleanOption("-allow-script-in-comments", true);

                + "</doc>";

        final ResponseData responseData = new ResponseData();
        responseData.setResponseBody(ResourceUtil.getResourceAsFile("html/test1.html"), false);
        responseData.setCharSet(Constants.UTF_8);
        final ResultData resultData = new ResultData();
        xpathTransformer.storeData(responseData, resultData);
        assertEquals(result, new String(resultData.getData(), Constants.UTF_8));
    }

        ResponseData fullData = new ResponseData();
        fullData.setUrl("http://example.com/page");
        fullData.setMimeType("text/html");
        fullData.setHttpStatusCode(200);
        fullData.setCharSet("UTF-8");
        fullData.setContentLength(1024L);
        assertTrue(rule.match(fullData));
    }

    /**
     * Test concurrent rule matching
     */