XSLT fails with DOMSource succeeds with StreamSource

Question

I'm trying to use XSLT to convert one XML document to another XML format. My stylesheet works when I use StreamSource for the source XML, but if I use DOMSource it doesn't convert it over instead the resulted XML is the following:
<?xml version="1.0" encoding="UTF-8"?>\n\r\n\r\n\r \n\r\n\r
StreamSource for the XML document works perfectly, and gives me the transformed document. Here is the code I'm using to convert the XML document using XSL.
        DocumentBuilder builder = domFactory.newDocumentBuilder();
        Document doc = builder.parse( policyFile );
        Element root = doc.getDocumentElement();
        String namespace = root.getAttribute("xmlns");
        String schemaVersion = root.getAttribute("schema-version");
        int index = schemaVersion.lastIndexOf(".");
        if( index > 0 ) {
            schemaVersion = schemaVersion.substring( 0, index );
        return convertSource( new DOMSource( doc ), new StreamSource(getConversionFile( namespace, schemaVersion )) );If I change the last time to :
        return convertSource( new StreamSource( policyFile ), new StreamSource(getConversionFile( namespace, schemaVersion )) );It produces the right output. Why is this not working with DOMSource?
Charlie

Answer 1

Here is the definition of convertSource():
private String convertSource( Source source, Source styleSheet ) throws TransformerException {
StringWriter writer = new StringWriter();
getTransformer(styleSheet).transform( source, new StreamResult( writer ) );
return writer.toString();