Java XSLT notes

Satya - Thursday, August 25, 2005 5:54:04 PM

Getting a transform factory

TransformerFactory tf = TransformerFactory.newInstance();

This is the entry point for getting an xslt "Transformer" object to do a transform.

Satya - Thursday, August 25, 2005 5:59:29 PM

A taste of getting a transformer object

Transformer t 
  = tf.newTransformer(
       new StreamSource(
             new StringReader(xsltString)));

Satya - Thursday, August 25, 2005 6:01:01 PM

Three kinds of sources

DOMSource
SAXSource
StreamSource 

Satya - Thursday, August 25, 2005 6:03:03 PM

Possible streamsources

File
InputStream
Reader
a string representing a URL 

Notice a string is not a stream source directly. If you do pass a string it will be thought of as a url and a url look up will be done

Satya - Thursday, August 25, 2005 6:04:45 PM

Getting a stream source out of a string

new StreamSource(new StringReader(yourstring));

Notice StringBufferInputStream is deprecated.

Satya - Friday, August 26, 2005 10:04:40 AM

Putting it all together: Transforming an xml string

   public static void transform(String xmlString, 
                     String xsltString, 
                     Writer outputWriter)
   throws TransformException
   {
      try
     {
         TransformerFactory tf = TransformerFactory.newInstance();
       
         Transformer t = tf.newTransformer(
             new StreamSource(
               new StringReader(xsltString)));
         
         t.transform(new StreamSource( 
                   new StringReader(xmlString)),
                     new StreamResult(outputWriter));
     }
      catch(TransformerConfigurationException x)
     {
         throw new TransformException("Error:xslt not properly configured.",x);
     }
      catch(TransformerException x)
     {
         throw new TransformException("Error:xslt transformation error.",x);
     }
   }