Xerces 2.6, setIndent(0), 1.4.2 not working. XML always pretty printing

Question

Hello.
I would like to take a string that contains xml and strip out all new lines, whitespace between tags, etc. So basically everything will be on one line.
So I thought one simple way would be to run an XMLSerializer or use a Transformer. However, it's turning out to be a nightmare. I probably could have written a parser already. :)
I've tried all possible combinations of
XMLSerializer
outputFormat.setIndenting(false)
outputFormat.setIndent(0)
outputFormat.setLineWidth(0)
Transformer
transformer.setOutputProperty("indent", "no")
transformer.setOutputProperty("{http://xml.apache.org/xalan}indent-amount", "0");For some reason, my XML is always pretty printed. And I can't figure it why. I was able to get the XMLSerializer version all on one line with an indent of 1, but the minute I switch to 0 it gets pretty printed.
Here's some Transformer code I'm using:
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
Document doc = docBuilder.parse( new InputSource( new StringReader(input)) );                      
DOMSource source = new DOMSource(doc);
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "no");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "0");
transformer.transform(source, new StreamResult(System.out));Output:
<?xml version="1.0" encoding="ISO-8859-1"?>
<trans_data>
  <input_data>
    <cc>1</cc>
  </input_data>
</trans_data>I've tried both 2.6.2 and 2.5.0 of Xerces and my classpath only has XercesImpl.jar and xml-apis.jar in it. I'm using 1.4.2-07.
Thanks,
-- Jason

Answer 1

public class XMLPrinter
     private static final String CLASSNAME = "XMLPrinter(): ";
     public static String print( String input )
        String methodName = "print(): ";
           String output = "";
        try
            DocumentBuilderFactory docBuilderFactory =
                DocumentBuilderFactory.newInstance();
            DocumentBuilder docBuilder =
                docBuilderFactory.newDocumentBuilder();
            Document doc = docBuilder.parse(
                new InputSource( new StringReader(input)) );
            StringWriter stringWriter = new StringWriter();
            OutputFormat format = new OutputFormat( doc );
                                             format.setIndenting( false );
            format.setLineWidth( 0 );
            format.setIndent( 0 );
            XMLSerializer serializer =
               new XMLSerializer( stringWriter, format );
            serializer.serialize(doc);
            output = stringWriter.toString();
        catch (Exception e)
            output = null;
        return output;
     public static void main(String[] args)
        String XML =
        "<xml> <output>junk</output>    <output2>junk2</output2>\r\n<output3>output3</output3>\r\n</xml>\r\n";
        System.out.println(XMLPrinter.print(XML));
     }returns
<?xml version="1.0" encoding="UTF-8"?>
<xml> <output>junk</output>    <output2>junk2</output2> <output3>output3</output3> </xml>Switching to
format.setLineWidth( 0 );
format.setIndenting( true );
format.setIndent( 10 );returns
<?xml version="1.0" encoding="UTF-8"?>
<xml>
          <output>junk</output>
          <output2>junk2</output2>
          <output3>output3</output3>
</xml>