Getting in troubles problems using Xerces 2.4 and Xalan 1.7.

[Francesc Guim Bernat]

Dear Colleagues,
   I'm trying to use Xalan and Xerces together, nevertheless i'm not 
able to run succesfully any of the codes that i've developed. I'm always 
getting and exception when the XalanSourceTreeParserLiaison or 
XercesParserLiaison are used (the exception is not and 
XalanDOMExcpetion, XSLException or DOMExcpetion). Also, when i'm running 
one of samples of the Xalanc source code provided by the library, the 
sample XPathWrapper, an exception is triggered. I don't how to solve 
this problem, i've tried many things but i'm always fail.... actually, 
i'm not too sure of what would be the error... I'm using Xerces 2.4 and 
Xalan 1.7.

Anyone can orient me ? what i'm doing wrong ? I atach my source code at 
the end of this mail.

i will be thankful for any help
cheers,
Francesc
LISTMSG XMLeanDBStatisticMsg::selectMsgs(char* selector)
{
   LISTMSG llista;
   XPathEvaluator::initialize();
   XalanSourceTreeDOMSupport        theDOMSupport;
   this->document->normalize();
   XercesParserLiaison * Liasion = new XercesParserLiaison();        

   XalanDocument* proxyDocument;
   XalanElement* xalContextNode ;
   try
   {
       proxyDocument = Liasion->createDocument(this->document);
       xalContextNode = proxyDocument->getDocumentElement();
   }
   catch(XalanDOMException& error)
   {
       return llista;
   }
   XPathEnvSupportDefault            theEnvSupport;
   XObjectFactoryDefault            theXObjectFactory;
   XPathExecutionContextDefault    theExecutionContext(theEnvSupport, 
theDOMSupport, theXObjectFactory);
   XPathConstructionContextDefault    theXPathConstructionContext;
   XPathFactoryDefault                theXPathFactory;
   XPathProcessorImpl                theXPathProcessor;

   try
   {                       
       XPath* const    xpath = theXPathFactory.create();
       theXPathProcessor.initXPath(*xpath,
                           theXPathConstructionContext,
                           XalanDOMString(selector),
                           ElementPrefixResolverProxy(xalContextNode, 
theEnvSupport, theDOMSupport));

       XObjectPtr xObj = xpath->execute(xalContextNode,
                             ElementPrefixResolverProxy(xalContextNode, 
theEnvSupport, theDOMSupport),
                             theExecutionContext);

       XalanNode* primer;
       DOMNode * actual;
       const NodeRefListBase&    resultat = xObj->nodeset();
       XercesDocumentWrapper * theWrapper = 
Liasion->mapDocumentToWrapper(proxyDocument);

       for(unsigned int i=0;i<resultat.getLength();i++)   
       {
           primer = resultat.item(i);
           //Un cop es te l'element el modifiquem afegint-hi un atribut.
           actual = (DOMElement*)(theWrapper->mapNode(resultat.item(i)));
           //Creem un element del tipus XMLeanDBStatisticMsg i l'afegim 
a la llista
           XMLeanStatisticMsg * nou = new XMLeanStatisticMsg(actual);
           llista.push_back(nou);
       }               
   }
   catch(XalanDOMException& error)
   {
       return llista;
   }
   catch(XSLException& error)
   {
       XalanDOMString er = error.getMessage();
       return llista;
   }
   catch (...)
   {
       return llista;   
   }

   return llista;
}