Assinatura Digital

[Fatal Error] :1:1: Content is not allowed in prolog.
org.xml.sax.SAXParseException: Content is not allowed in prolog.
	at org.apache.xerces.parsers.DOMParser.parse(DOMParser.java:267)
	at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:201)
	at br.com.wg.util.xml.DOMUtil.parser(DOMUtil.java:299)
	at br.com.wg.util.xml.DOMUtil.parseString(DOMUtil.java:263)
	at br.com.wg.util.xml.DOMUtil.parse(DOMUtil.java:231)

private static Document parser(Object obj) 
    		throws ParserConfigurationException, SAXException, IOException {
        Document document = null;
        // Initiate DocumentBuilderFactory
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

        // To get a validating parser
        factory.setValidating(false);
        // Whitespaces are important!
//        factory.setIgnoringElementContentWhitespace(false);
        // To get one that understands namespaces
        factory.setNamespaceAware(true);
        
//        factory.setIgnoringComments(true);

        // Get DocumentBuilder
        DocumentBuilder builder = factory.newDocumentBuilder();
        // Parse and load into memory the Document
        if(obj instanceof File){
            document = builder.parse((File)obj);
        }else if(obj instanceof InputStream){
            document = builder.parse( (InputStream) obj);
        }else if(obj instanceof InputSource){
            document = builder.parse( (InputSource) obj);
        } else if (obj instanceof String) {
        	document = builder.parse(new InputSource(
        			new StringReader((String) obj)));
        }
        return document;
    }

document = builder.parse(new InputSource(
        			new StringReader((String) obj)));

[#document: null]