XPath with namespaces

[장승필]

Hi, all.

I want to get the special element.

I have that xml file.

-------------------------

<?xml .... ?>

<dsig:Signature xmlns:dsig="http://www.w3.org/2000/09/xmldsig#">

 <dsig:SignedInfo xmlns:dsig="http://www.w3.org/2000/09/xmldsig#">

  ....

</dsig:Signature>

--------------------------

And, I get the 'Signature' element.

So I use the xpath _expression_ like this, "/descendant-or-self::dsig:Signature"

But, My app throws a exception.

 

My code..

---------------------------------------------

char* strSchema = "http://www.w3.org/2000/09/xmldsig# D:\\xmldsig.xsd" ;
DOMParser* parser = new DOMParser;
DOMParser::ValSchemes    valScheme = DOMParser::Val_Always;
bool                     doNamespaces       = true;
bool                     doSchema           = true;
bool                     schemaFullChecking = true;

 

parser->setValidationScheme(valScheme);
parser->setDoNamespaces(doNamespaces);
parser->setDoSchema(doSchema);
parser->setExternalSchemaLocation(strSchema) ;
parser->setValidationSchemaFullChecking(schemaFullChecking);

parser->parse(xmlFile);

DOM_Document doc = parser->getDocument() ;
XercesDOMSupport*  support = new XercesDOMSupport() ;
XercesDOMSupport  theDOMSupport ;
XercesParserLiaison  theLiaison(theDOMSupport) ;

XalanDocument*  theDocument = theLiaison.createDocument(doc) ;

XPathEvaluator theEvaluator;
XalanNode* const theContextNode = theDocument->getDocumentElement() ;
const char* xpathstr = "/descendant-or-self::dsig:Signature" ;

const XObjectPtr result = theEvaluator.evaluate(*support, theContextNode, 

                 XalanDOMString(xpathstr).c_str(), theContextNode) ; // <-- throw exception
        .....................