PrettyPrinting. Ignoring whitespaces.

Question

Hi 1st Question, be gentle.

I'm trying to use javax.xml.transform.Transformer to format some xml string to be indented / spaceless between the tags. If there are no spaces between the tags, it works ok. If there are it acts weird. I'll post an example. I tried to follow up on the following topic : http://forums.sun.com/thread.jspa?messageID=2054303#2699961. No success.

Code to follow :

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
   factory.setIgnoringElementContentWhitespace(true);
   DocumentBuilder builder = factory.newDocumentBuilder();
   DOMImplementation domImpl = builder.getDOMImplementation();
   DOMImplementationLS ls = (DOMImplementationLS) domImpl.getFeature("LS", "3.0");
   LSInput in = ls.createLSInput();
   in.setByteStream(new ByteArrayInputStream(input.getBytes()));
   LSParser parser = ls.createLSParser(DOMImplementationLS.MODE_SYNCHRONOUS,
     "http://www.w3.org/2001/XMLSchema");
   Document xmlInput = parser.parse(in);

   StringWriter stringWriter = new StringWriter();
   StreamResult xmlOutput = new StreamResult(stringWriter);
   TransformerFactory f = TransformerFactory.newInstance();
   f.setAttribute("indent-number", 2);

   Transformer transformer = f.newTransformer();
   transformer.setOutputProperty(OutputKeys.INDENT, "yes");
   transformer.setOutputProperty(OutputKeys.METHOD, "xml");
   transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
   transformer.transform(new DOMSource(xmlInput), xmlOutput);

If there's no interruption between tags

input : <tag><nested>    hello   </nested></tag>
output : 
<tag>
  <nested>    hello   </nested>
</tag>

If there is :

input : <tag>  <nested>    hello   </nested></tag>
output : 
<tag>  <nested>    hello   </nested>
</tag>

JVM 1.6.

Is something obvious wrong here ?

Answer 1

Fixed using a stylesheet. thanks.