javax.xml.transform.Transformer Java Examples

public static Document loadDom(String url) {
 Parser parser = new Parser();

 try {
   parser.setFeature(Parser.namespacesFeature, false);
   parser.setFeature(Parser.namespacePrefixesFeature, false);
   Reader reader = openReader(url);
   DOMResult result = new DOMResult();
   Transformer transformer = TransformerFactory.newInstance().newTransformer();
   transformer.transform(new SAXSource(parser, new InputSource(reader)), result);
   reader.close();
   return (Document) result.getNode();
 } catch (Exception e) {
   throw new RuntimeException(e);
 }
}
 

private void transform(EDLContext edlContext, Document dom, HttpServletResponse response) throws Exception {
	if (StringUtils.isNotBlank(edlContext.getRedirectUrl())) {
		response.sendRedirect(edlContext.getRedirectUrl());
		return;
	}
    response.setContentType("text/html; charset=UTF-8");
	Transformer transformer = edlContext.getTransformer();

       transformer.setOutputProperty("indent", "yes");
       transformer.setOutputProperty(OutputKeys.INDENT, "yes");
       String user = null;
       String loggedInUser = null;
       if (edlContext.getUserSession() != null) {
           Person wu = edlContext.getUserSession().getPerson();
           if (wu != null) user = wu.getPrincipalId();
           wu = edlContext.getUserSession().getPerson();
           if (wu != null) loggedInUser = wu.getPrincipalId();
       }
       transformer.setParameter("user", user);
       transformer.setParameter("loggedInUser", loggedInUser);
       if (LOG.isDebugEnabled()) {
       	LOG.debug("Transforming dom " + XmlJotter.jotNode(dom, true));
       }
       transformer.transform(new DOMSource(dom), new StreamResult(response.getOutputStream()));
}
 

public void writeTo(SOAPMessage saaj) throws SOAPException {
        try {
            // TODO what about in-scope namespaces
            // Not very efficient consider implementing a stream buffer
            // processor that produces a DOM node from the buffer.
            Transformer t = XmlUtil.newTransformer();
            SOAPHeader header = saaj.getSOAPHeader();
            if (header == null)
                header = saaj.getSOAPPart().getEnvelope().addHeader();
// TODO workaround for oracle xdk bug 16555545, when this bug is fixed the line below can be
// uncommented and all lines below, except the catch block, can be removed.
//            t.transform(epr.asSource(localName), new DOMResult(header));
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            XMLStreamWriter w = XMLOutputFactory.newFactory().createXMLStreamWriter(baos);
            epr.writeTo(localName, w);
            w.flush();
            ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
            DocumentBuilderFactory fac = XmlUtil.newDocumentBuilderFactory(false);
            fac.setNamespaceAware(true);
            Node eprNode = fac.newDocumentBuilder().parse(bais).getDocumentElement();
            Node eprNodeToAdd = header.getOwnerDocument().importNode(eprNode, true);
            header.appendChild(eprNodeToAdd);
        } catch (Exception e) {
            throw new SOAPException(e);
        }
    }
 

public static void testXmlClusteredCache(OsgiTestUtils.Cluster cluster) throws Exception {
  File config = cluster.getWorkingArea().resolve("ehcache.xml").toFile();

  Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(TestMethods.class.getResourceAsStream("ehcache-clustered-osgi.xml"));
  XPath xpath = XPathFactory.newInstance().newXPath();
  Node clusterUriAttribute = (Node) xpath.evaluate("//config/service/cluster/connection/@url", doc, XPathConstants.NODE);
  clusterUriAttribute.setTextContent(cluster.getConnectionUri().toString() + "/cache-manager");
  Transformer xformer = TransformerFactory.newInstance().newTransformer();
  xformer.transform(new DOMSource(doc), new StreamResult(config));


  try (PersistentCacheManager cacheManager = (PersistentCacheManager) CacheManagerBuilder.newCacheManager(
    new XmlConfiguration(config.toURI().toURL(), TestMethods.class.getClassLoader())
  )) {
    cacheManager.init();

    final Cache<Long, Person> cache = cacheManager.getCache("clustered-cache", Long.class, Person.class);

    cache.put(1L, new Person("Brian"));
    assertThat(cache.get(1L).name, is("Brian"));
  }
}
 

public Source invoke(Source request) {
    TransformerFactory transformerFactory = TransformerFactory.newInstance();
    try {
        transformerFactory.setFeature(javax.xml.XMLConstants.FEATURE_SECURE_PROCESSING, true);
        /*
        tfactory.setAttribute("indent-number", "2");
         */
        Transformer serializer = transformerFactory.newTransformer();
        // Setup indenting to "pretty print"
        serializer.setOutputProperty(OutputKeys.INDENT, "yes");
        serializer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");

        StringWriter swriter = new StringWriter();
        serializer.transform(request, new StreamResult(swriter));
        swriter.flush();
        LOG.info("Provider received a request\n" + swriter.toString());

    } catch (TransformerException e) {
        e.printStackTrace();
    }
    return null;
}
 

private static final void writeDoc(Document doc, OutputStream out)
    throws IOException
{
    try {
        TransformerFactory tf = TransformerFactory.newInstance();
        try {
            tf.setAttribute("indent-number", new Integer(2));
        } catch (IllegalArgumentException iae) {

        }
        Transformer t = tf.newTransformer();
        t.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, doc.getDoctype().getSystemId());
        t.setOutputProperty(OutputKeys.INDENT, "yes");

        t.transform(new DOMSource(doc),
                    new StreamResult(new BufferedWriter(new OutputStreamWriter(out, "UTF-8"))));
    } catch(TransformerException e) {
        throw new AssertionError(e);
    }
}
 

private void buildSubsystemXml(final Element element, final String expression) throws IOException {
    if (element != null) {
        try {
            // locate the element and insert the node
            XPath xPath = XPathFactory.newInstance().newXPath();
            NodeList nodeList = (NodeList) xPath.compile(expression).evaluate(this.document, XPathConstants.NODESET);
            nodeList.item(0).appendChild(element);
            // transform again to XML
            TransformerFactory tf = TransformerFactory.newInstance();
            Transformer transformer = tf.newTransformer();
            transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
            StringWriter writer = new StringWriter();
            transformer.transform(new DOMSource(this.document), new StreamResult(writer));
            this.subsystemXml = writer.getBuffer().toString();
        } catch(TransformerException | XPathExpressionException e) {
            throw new IOException(e);
        }
    } else {
        this.subsystemXml = this.subsystemTemplate;
    }
}
 

/**
 * Create a Transformer object that from the input stylesheet
 * Uses the com.sun.org.apache.xalan.internal.processor.TransformerFactory.
 * @param source the stylesheet.
 * @return A Transformer object.
 */
public Transformer newTransformer(Source source) throws
    TransformerConfigurationException
{
    if (_xalanFactory == null) {
        createXalanTransformerFactory();
    }
    if (_errorlistener != null) {
        _xalanFactory.setErrorListener(_errorlistener);
    }
    if (_uriresolver != null) {
        _xalanFactory.setURIResolver(_uriresolver);
    }
    _currFactory = _xalanFactory;
    return _currFactory.newTransformer(source);
}
 

private String copyDOMToString(Document wadlDoc) throws Exception {
    DOMSource domSource = new DOMSource(wadlDoc);
    // temporary workaround
    StringWriter stringWriter = new StringWriter();
    TransformerFactory transformerFactory = TransformerFactory.newInstance();
    transformerFactory.setFeature(javax.xml.XMLConstants.FEATURE_SECURE_PROCESSING, true);
    try {
        transformerFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
        transformerFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_STYLESHEET, "");
    } catch (IllegalArgumentException ex) {
        // ignore
    }

    Transformer transformer = transformerFactory.newTransformer();
    transformer.transform(domSource, new StreamResult(stringWriter));
    return stringWriter.toString();
}
 

/**
 * Pretty print XML Node
 * @param node
 * @return
 * @throws XmlUtilitiesException
 */
public String xmlNodeToString( Node node ) throws XmlUtilitiesException {

    StringWriter sw = new StringWriter();
    try {
        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        transformer.setOutputProperty(OutputPropertiesFactory.S_KEY_INDENT_AMOUNT, "4");
        transformer.setOutputProperty(OutputPropertiesFactory.S_KEY_LINE_SEPARATOR, "\n");
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
        transformer.transform(new DOMSource(node), new StreamResult(sw));
    } catch (TransformerException te) {
        throw new XmlUtilitiesException("Error transforming XML node to String", te);
    }
    return sw.toString().trim();
}
 

private void removeByXpathExpression(String pomFilePath, String expression) throws SAXException, IOException, ParserConfigurationException, XPathExpressionException, TransformerException {
    File xmlFile = new File(pomFilePath);
    Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(xmlFile);
    XPath xpath = XPathFactory.newInstance().newXPath();
    NodeList nl = (NodeList) xpath.compile(expression).
            evaluate(doc, XPathConstants.NODESET);

    if (nl != null && nl.getLength() > 0) {
        for (int i = 0; i < nl.getLength(); i++) {
            Node node = nl.item(i);
            node.getParentNode().removeChild(node);
        }

        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        // need to convert to file and then to path to override a problem with spaces
        Result output = new StreamResult(new File(pomFilePath).getPath());
        Source input = new DOMSource(doc);
        transformer.transform(input, output);
    }
}
 

/**
 * Adds the specified element to the XML document and returns the document's contents as a String
 */
public static String addElementAndGetDocumentAsString(Document doc, Element el)
{
	doc.appendChild(el);

	try {
		TransformerFactory tranFactory = TransformerFactory.newInstance();
		Transformer aTransformer = tranFactory.newTransformer();
		Source src = new DOMSource(doc);
		StringWriter writer = new StringWriter();
		Result dest = new StreamResult(writer);
		aTransformer.transform(src, dest);
		String result = writer.getBuffer().toString();
		return result;
	}
	catch (Exception e) {
		throw new ContentReviewProviderException("Failed to transform the XML Document into a String");
	}
}
 

/**
 * @bug 8165116
 * Verifies that redirect works properly when extension function is enabled
 *
 * @param xml the XML source
 * @param xsl the stylesheet that redirect output to a file
 * @param output the output file
 * @param redirect the redirect file
 * @throws Exception if the test fails
 **/
@Test(dataProvider = "redirect")
public void testRedirect(String xml, String xsl, String output, String redirect) throws Exception {

    TransformerFactory tf = TransformerFactory.newInstance();
    tf.setFeature(ORACLE_ENABLE_EXTENSION_FUNCTION, true);
    Transformer t = tf.newTransformer(new StreamSource(new StringReader(xsl)));

    //Transform the xml
    tryRunWithTmpPermission(
            () -> t.transform(new StreamSource(new StringReader(xml)), new StreamResult(new StringWriter())),
            new FilePermission(output, "write"), new FilePermission(redirect, "write"));

    // Verifies that the output is redirected successfully
    String userDir = getSystemProperty("user.dir");
    Path pathOutput = Paths.get(userDir, output);
    Path pathRedirect = Paths.get(userDir, redirect);
    Assert.assertTrue(Files.exists(pathOutput));
    Assert.assertTrue(Files.exists(pathRedirect));
    System.out.println("Output to " + pathOutput + " successful.");
    System.out.println("Redirect to " + pathRedirect + " successful.");
    Files.deleteIfExists(pathOutput);
    Files.deleteIfExists(pathRedirect);
}
 

protected void executeTemplate(String site, String path, OutputStream os) throws UpgradeException {
    if(contentRepository.contentExists(site, path)) {
        try(InputStream templateIs = template.getInputStream()) {
            // Saxon is used to support XSLT 2.0
            Transformer transformer =
                TransformerFactory.newInstance(SAXON_CLASS, null)
                    .newTransformer(new StreamSource(templateIs));
            logger.info("Applying XSLT template {0} to file {1} for site {2}", template, path, site);
            try(InputStream sourceIs = contentRepository.getContent(site, path)) {
                transformer.setParameter(PARAM_KEY_SITE, site);
                transformer.setParameter(PARAM_KEY_VERSION, nextVersion);
                transformer.setURIResolver(getURIResolver(site));
                transformer.transform(new StreamSource(sourceIs), new StreamResult(os));
            }
        } catch (Exception e) {
            throw new UpgradeException("Error processing file", e);
        }
    } else {
        logger.warn("Source file {0} does not exist in site {1}", path, site);
    }
}
 

private String writeDocument(Document d) {
    try {
        DOMSource source = new DOMSource(d);

        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
        transformer.setOutputProperty(OutputKeys.STANDALONE, "yes");
        
        StringWriter writer = new StringWriter();
        StreamResult result = new StreamResult(writer);

        transformer.transform(source, result);

        return writer.toString();
    }
    catch (Exception e) {
        return null;
    }
}
 

/**
 * @param xmlName
 *            the name of XML file
 * @param stylesheetName
 *            the name of style sheet
 * @param outputFile
 *            the name of log file
 * @return boolean
 * @see
 * @since 1.0
 */
public boolean toStyledDocument(final String xmlName,
		final String stylesheetName, final String outputFile) {
	TransformerFactory factory = TransformerFactory.newInstance();
	StreamSource xslStream = new StreamSource(stylesheetName);
	Transformer transformer;
	try {
		transformer = factory.newTransformer(xslStream);
		StreamSource in = new StreamSource(xmlName);
		StreamResult out = new StreamResult(outputFile);
		transformer.transform(in, out);
	} catch (TransformerException e) {
		logger.debug(MessageCatalog._00101_TRANSFORMATION_EXCEPTION);
		e.printStackTrace();
		return false;
	}
	return true;
}
 

/** Transform an xsl-fo StreamSource to the specified output format.
 * @param src The xsl-fo StreamSource instance
 * @param stylesheet Optional stylesheet StreamSource instance
 * @param fop
 */
public static void transform(StreamSource src, StreamSource stylesheet, Fop fop) throws FOPException {
    Result res = new SAXResult(fop.getDefaultHandler());
    try {
        TransformerFactory factory = TransformerFactory.newInstance();
        Transformer transformer;
        if (stylesheet == null) {
            transformer = factory.newTransformer();
        } else {
            transformer = factory.newTransformer(stylesheet);
        }
        transformer.setURIResolver(new LocalResolver(transformer.getURIResolver()));
        transformer.transform(src, res);
    } catch (Exception e) {
        throw new FOPException(e);
    }
}
 

/**
 * Saves the search filters to the specified search filters file.
 * @param filtersFile filters file to save to
 */
private void saveSearchFiltersFile( final File filtersFile ) {
	try {
		final Document document    = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
		final Element  rootElement = document.createElement( "filters" );
		rootElement.setAttribute( "version", "1.0" ); // To keep the possibility for future changes
		
		for ( final SearchFieldGroup searchFieldGroup : searchFieldGroups )
			searchFieldGroup.saveValues( document, rootElement );
		
		document.appendChild( rootElement );
		
		final Transformer transformer = TransformerFactory.newInstance().newTransformer();
		transformer.setOutputProperty( OutputKeys.INDENT, "yes" );
		transformer.transform( new DOMSource( document ), new StreamResult( filtersFile ) );
		
		GuiUtils.showInfoDialog( Language.getText( "module.repSearch.tab.filters.filtersSaved" ) );
	} catch ( final Exception e ) {
		e.printStackTrace();
		GuiUtils.showErrorDialog( Language.getText( "module.repSearch.tab.filters.failedToSaveFilters" ) );
	}
}
 

public static Element convert(Source stsResponse) throws IntegrationModuleException {
   try {
      StringWriter stringWriter = new StringWriter();
      Result result = new StreamResult(stringWriter);
      TransformerFactory factory = TransformerFactory.newInstance();
      Transformer transformer = factory.newTransformer();
      transformer.transform(stsResponse, result);
      String xmlResponse = stringWriter.getBuffer().toString();
      return SAML10Converter.toElement(xmlResponse);
   } catch (TransformerException var6) {
      throw new IntegrationModuleException(var6);
   }
}
 

public static String getJmsDestinations(String confResString)
		throws IOException, DomBuilderException, TransformerException, SAXException {
	URL url = ClassUtils.getResourceURL(IbmMisc.class, GETJMSDEST_XSLT);
	if (url == null) {
		throw new IOException(
				"cannot find resource [" + GETJMSDEST_XSLT + "]");
	}
	Transformer t = XmlUtils.createTransformer(url, 2);
	String jmsDestinations = XmlUtils.transformXml(t, confResString);
	if (LOG.isDebugEnabled()) {
		LOG.debug("jmsDestinations [" + chomp(jmsDestinations, 100, true)
				+ "]");
	}
	return jmsDestinations;
}
 

public static void writeToIndentedXMLFile(String configFile, Document domDocument) throws Exception
{
  DataOutputStream out = new DataOutputStream(new FileOutputStream(configFile));
  TransformerFactory tFactory = TransformerFactory.newInstance();
  Transformer transformer = tFactory.newTransformer();
  DOMSource source = new DOMSource(domDocument);
  StreamResult result = new StreamResult(out);
  transformer.setOutputProperty(OutputKeys.INDENT, "yes");
  transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
  transformer.transform(source, result);
  out.close();
}
 

private static void updateConfig(Path configFile, String name, boolean isExploded) throws Exception {
    FileInputStream fileInputStream = new FileInputStream(configFile.toFile());
    DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();

    Document document = documentBuilder.parse(fileInputStream);
    Element root = document.getDocumentElement();

    NodeList lst = root.getChildNodes();
    for (int i = 0; i < lst.getLength(); i++) {
        Node n = lst.item(i);
        if (n instanceof Element) {
            if (DEPLOYMENTS.equals(n.getNodeName())) {
                throw BootableJarLogger.ROOT_LOGGER.deploymentAlreadyExist();
            }
        }
    }
    Element deployments = document.createElement(DEPLOYMENTS);
    Element deployment = document.createElement(DEPLOYMENT);
    Element content = document.createElement(CONTENT);
    content.setAttribute(SHA1, DEP_1 + DEP_2);
    if (isExploded) {
        content.setAttribute(ARCHIVE, "false");
    }
    deployment.appendChild(content);
    deployment.setAttribute(NAME, name);
    deployment.setAttribute(RUNTIME_NAME, name);
    deployments.appendChild(deployment);

    root.appendChild(deployments);
    Transformer transformer = TransformerFactory.newInstance().newTransformer();
    StreamResult output = new StreamResult(configFile.toFile());
    DOMSource input = new DOMSource(document);

    transformer.transform(input, output);

}
 

/** Transform a XML Document to String */
public static String toString(Document doc) {
	try {
		DOMSource domSource = new DOMSource(doc);
		StringWriter writer = new StringWriter();
		StreamResult result = new StreamResult(writer);
		TransformerFactory tf = TransformerFactory.newInstance();
		Transformer transformer = tf.newTransformer();
		transformer.transform(domSource, result);
		return writer.toString();
	} catch (Exception e) {
		e.printStackTrace();
		return "";
	}
}
 

/**
 * Create a transformer from a stylesheet
 *
 * @param stylesheet Document
 *
 * @return the Transformer
 */
public static Transformer createTransformer(Document stylesheet)
{

  if(log.isDebugEnabled())
  {
    log.debug("createTransformer(Document " + stylesheet + ")");
  }

  Transformer transformer = null;
  TransformerFactory transformerFactory = TransformerFactory.newInstance();
  URIResolver resolver = new URIResolver();
  transformerFactory.setURIResolver(resolver);


  try
  {
    DOMSource source = new DOMSource(stylesheet);
    String systemId = "/xml/xsl/report";
    source.setSystemId(systemId);
    transformer = transformerFactory.newTransformer(source);
  }
  catch(TransformerConfigurationException e)
  {
    log.error(e.getMessage(), e);
  }

  return transformer;
}
 

public final Map<String, String> execute(final ApplyXslTransformationInputs applyXslTransformationInputs)
        throws Exception {
    final Templates template = getTemplate(applyXslTransformationInputs);
    final Transformer xmlTransformer = template.newTransformer();

    final Source source = getSourceStream(applyXslTransformationInputs);
    final Result result = getResultStream(applyXslTransformationInputs);

    xmlTransformer.transform(source, result);
    if (StringUtilities.isEmpty(applyXslTransformationInputs.getOutputFile())) {
        return OutputUtilities.getSuccessResultsMap(((StreamResult) result).getWriter().toString());
    }
    return OutputUtilities.getSuccessResultsMap("Result was written in the output file: " + applyXslTransformationInputs.getOutputFile());
}
 

byte[] getOriginalBytes() throws Exception {
    JAXBSource in = new JAXBSource(CONTEXT, tfd);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    Result out = new StreamResult(baos);
    TransformerFactory factory = tf;
    if (factory == null) {
        factory = TransformerFactory.newInstance();
    }
    Transformer transformer = factory.newTransformer(new StreamSource(getClass().getResourceAsStream(XSLT)));
    transformer.transform(in, out);
    return baos.toByteArray();
}
 

/**
 * javax.xml.transform.sax.TransformerFactory implementation.
 * Process the Source into a Templates object, which is a a compiled
 * representation of the source. Note that this method should not be
 * used with XSLTC, as the time-consuming compilation is done for each
 * and every transformation.
 *
 * @return A Templates object that can be used to create Transformers.
 * @throws TransformerConfigurationException
 */
@Override
public Transformer newTransformer(Source source) throws
    TransformerConfigurationException
{
    final Templates templates = newTemplates(source);
    final Transformer transformer = templates.newTransformer();
    if (_uriResolver != null) {
        transformer.setURIResolver(_uriResolver);
    }
    return(transformer);
}
 

@Override
public void encode(Object object, Type bodyType, RequestTemplate template) {
  if (!(bodyType instanceof Class)) {
    throw new UnsupportedOperationException(
        "SOAP only supports encoding raw types. Found " + bodyType);
  }
  try {
    Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
    Marshaller marshaller = jaxbContextFactory.createMarshaller((Class<?>) bodyType);
    marshaller.marshal(object, document);
    SOAPMessage soapMessage = MessageFactory.newInstance(soapProtocol).createMessage();
    soapMessage.setProperty(SOAPMessage.WRITE_XML_DECLARATION,
        Boolean.toString(writeXmlDeclaration));
    soapMessage.setProperty(SOAPMessage.CHARACTER_SET_ENCODING, charsetEncoding.displayName());
    soapMessage.getSOAPBody().addDocument(document);
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    if (formattedOutput) {
      Transformer t = TransformerFactory.newInstance().newTransformer();
      t.setOutputProperty(OutputKeys.INDENT, "yes");
      t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
      t.transform(new DOMSource(soapMessage.getSOAPPart()), new StreamResult(bos));
    } else {
      soapMessage.writeTo(bos);
    }
    template.body(new String(bos.toByteArray()));
  } catch (SOAPException | JAXBException | ParserConfigurationException | IOException
      | TransformerFactoryConfigurationError | TransformerException e) {
    throw new EncodeException(e.toString(), e);
  }
}
 

DOMSource toDOMSource(Source source) throws Exception {
    if (source instanceof DOMSource) {
        return (DOMSource) source;
    }
    Transformer trans = TransformerFactory.newInstance().newTransformer();
    DOMResult result = new DOMResult();
    trans.transform(source, result);
    trans.transform(new DOMSource(result.getNode()), new StreamResult(System.out));
    return new DOMSource(result.getNode());
}
 

protected byte[] perform(byte[] input) throws Exception {
     DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
     dbf.setNamespaceAware(true);
     Document doc = dbf.newDocumentBuilder().parse(new ByteArrayInputStream(input));

     this.createSignature(doc);

     DOMSource source = new DOMSource(doc);
     ByteArrayOutputStream bos = new ByteArrayOutputStream();
     StreamResult result = new StreamResult(bos);
     TransformerFactory transformerFactory = TransformerFactory.newInstance();
     Transformer transformer = transformerFactory.newTransformer();
     transformer.transform(source, result);
     return bos.toByteArray();
}