Examples of javax.xml.transform.Transformer

javax.xml.transform.Transformer
An instance of this abstract class can transform a source tree into a result tree.
An instance of this class can be obtained with the {@link TransformerFactory#newTransformer TransformerFactory.newTransformer}method. This instance may then be used to process XML from a variety of sources and write the transformation output to a variety of sinks.

An object of this class may not be used in multiple threads running concurrently. Different Transformers may be used concurrently by different threads.

A Transformer may be used multiple times. Parameters and output properties are preserved across transformations.
@author Jeff Suttor @version $Revision: 226183 $, $Date: 2005-04-08 06:39:14 -0400 (Fri, 08 Apr 2005) $

    public SAXSource invoke(SAXSource request) {
        SAXSource response = new SAXSource();
        try {
            
            DOMResult domResult = new DOMResult();
            Transformer transformer = TransformerFactory.newInstance().newTransformer();
            transformer.transform(request, domResult);
            Node n = domResult.getNode().getFirstChild();


            while (n.getNodeType() != Node.ELEMENT_NODE) {
                n = n.getNextSibling();
            }

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    public StreamSource invoke(StreamSource request) {
        StreamSource response = new StreamSource();
        try {
            DOMResult domResult = new DOMResult();
            Transformer transformer = TransformerFactory.newInstance().newTransformer();
            transformer.transform(request, domResult);
            Node n = domResult.getNode().getFirstChild();


            while (n.getNodeType() != Node.ELEMENT_NODE) {
                n = n.getNextSibling();
            }

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            StreamSource xml = new StreamSource( xmlstream );


            /* Transform */
            StreamResult output = new StreamResult( response.getWriter(  ) );
            Transformer  transformer = factory.newTransformer( xsl );
            Map          params = getXslParameters( request, response );
            if ( params != null )
            {
                Iterator it = params.keySet(  ).iterator(  );
                while ( it.hasNext(  ) )
                {
                    String key = ( String ) it.next(  );
                    transformer.setParameter( key, params.get( key ) );
                }
            }


            transformer.transform( xml, output );
        }
        catch ( TransformerConfigurationException t )
        {
            throw new PortletException( t );
        }

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          * this causes problems;
          * so we convert the stylesheet to byte[] and use this as input stream
          */
         {
            ByteArrayOutputStream os = new ByteArrayOutputStream();
            Transformer transformer = tFactory.newTransformer();
            DOMSource source = new DOMSource(_xsltElement);
            StreamResult result = new StreamResult(os);


            transformer.transform(source, result);


            stylesheet =
               new StreamSource(new ByteArrayInputStream(os.toByteArray()));
         }


         Transformer transformer = tFactory.newTransformer(stylesheet);
         if (baos==null) {
               ByteArrayOutputStream baos1 = new ByteArrayOutputStream();
               StreamResult outputTarget = new StreamResult(baos1);
               transformer.transform(xmlSource, outputTarget);
               return new XMLSignatureInput(baos1.toByteArray());


         }
         StreamResult outputTarget = new StreamResult(baos);


         transformer.transform(xmlSource, outputTarget);         
         XMLSignatureInput output=new XMLSignatureInput((byte[])null);
         output.setOutputStream(baos);
         return output;
      } catch (XMLSecurityException ex) {
         Object exArgs[] = { ex.getMessage() };

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        StringWriter stringWriter = new StringWriter();
        StreamResult streamResult = new StreamResult(stringWriter);


        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer;
        try {
            transformer = transformerFactory.newTransformer();
        } catch (TransformerConfigurationException e) {
            throw new IllegalStateException("Unable to get a new transformer", e);
        }


        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");


        // transform OUTPUT
        try {
            transformer.transform(new DOMSource(document), streamResult);
        } catch (TransformerException e) {
            throw new IllegalStateException("Unable to transform the document", e);
        }


        return stringWriter.toString();

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    // Once again we are using a factory of some sort,
    // this time for getting a Transformer instance,
    // which we use to output the XML
    TransformerFactory transformerFactory = TransformerFactory
        .newInstance();
    Transformer transformer = transformerFactory.newTransformer();


    // Indenting the XML
    transformer.setOutputProperty(OutputKeys.INDENT, "yes");


    // The actual output to a file goes here
    transformer.transform(source, result);


    return true;
  }

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              String msg = Utils.messages.createMessage(
                  MsgKey.ER_ENCODING_NOT_SUPPORTED,new Object[]{ encoding });
              try 
              {
                // Prepare to issue the warning message
                Transformer tran = super.getTransformer();
                if (tran != null) {
                  ErrorListener errHandler = tran.getErrorListener();
                  // Issue the warning message
                  if (null != errHandler && m_sourceLocator != null)
                    errHandler.warning(new TransformerException(msg, m_sourceLocator));
                  else
                    System.out.println(msg);

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    public static void printDocument(Document document, String fname){
        try{


            TransformerFactory tf = TransformerFactory.newInstance();
            Transformer transformer = tf.newTransformer();
            DOMSource source = new DOMSource(document);
            StreamResult result;


            if (fname == null)
                result = new StreamResult(System.out);
            else
                result = new StreamResult(new FileWriter(fname));


            transformer.transform(source, result);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }

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  public String toString() {
    StringWriter sresult = new StringWriter();
       try {
           DOMSource source = new DOMSource(getDOMrepresentation());
           StreamResult result = new StreamResult(sresult);
           Transformer trans = TransformerFactory.newInstance().newTransformer();
           trans.setOutputProperty(OutputKeys.INDENT, "yes");
           trans.transform(source, result);
          }
          catch (Exception e) {
            throw new Error(e);
          }
        return sresult.toString();

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  public String toString() {
    StringWriter sresult = new StringWriter();
       try {
           DOMSource source = new DOMSource(getDOMrepresentation());
           StreamResult result = new StreamResult(sresult);
           Transformer trans = TransformerFactory.newInstance().newTransformer();
           trans.setOutputProperty(OutputKeys.INDENT, "yes");
           trans.transform(source, result);
          }
          catch (Exception e) {
            throw new Error(e);
          }
        return sresult.toString();

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