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-- Ovanes Markarian -----Original Message----- Date: Thu, 17 Nov 2005 10:41:12 +0100 Subject: Applying xPath to Xerces DOMDocument fails From: "[EMAIL PROTECTED]" To: "Mailing List, Xalan-C" Hello, I am relatively new to Xalan and somehow it drives me mad. I need to apply an xPath to the pre-parsed XML document. The document is a Xerces DOMDocument instance. I read some postings on how to do that, but none of them worked. I will try to summerize my efforts below: I saw a post from Joerg Seidler: http://marc.theaimsgroup.com/?l=xalan-c-users&m=108385669500218&w=2 and tried to do it in similar way, but with no luck. My system configuration is: Xerces-C 2.7.0 Xalan-C 1.10 May be I forgot some initialization or anything else. Below are my explanations: 1. Assume that Xerces-C and XPathEvaluator initializations succeeded. And I have successfully parsed an XML document and have a DOMDocument instance pointer to which I need xPath to be applied. xPath expression was successfully tested for this document with XMLSpy and Oxygen XML Editors (internally uses Xerces-J and Xalan-J). And the selection always delivered the desired node. I extensively use namespaces in my document and have my own namespace defined as default namespace. I know that xPath 1.0 does not support default namespaces that's why I also write a prefiexed xPath to the desired element. My code looks as follows: //xtcxsl, xtcxml are defined as follows: /* #ifdef XERCES_CPP_NAMESPACE namespace xtcxml=XERCES_CPP_NAMESPACE; #else #define xtcxml #endif #ifdef XALAN_CPP_NAMESPACE namespace xtcxsl=XALAN_CPP_NAMESPACE; #else #define xtcxsl #endif */ //assume that xPath is defined upon as XMLCh* or char* xtcxsl::XMLSupportInit xmlSupportInit; xtcxsl::XercesDOMSupport dom_support; xtcxsl::XercesParserLiaison parser_liaison(dom_support); parser_liaison.setBuildWrapperNodes(true); parser_liaison.setBuildMaps(true); xtcxsl::XercesDOMWrapperParsedSource xSource(pDoc, parser_liaison, dom_support); //xtcxml::DOMDocument* pDoc is defined upon. xtcxsl::XalanDocument& xeDoc = *xSource.getDocument(); xtcxsl::XalanElement* ns_node = xeDoc.getDocumentElement(); xtcxsl::XPathEvaluator evaluator; xtcxsl::NodeRefList result; //resulting list has no elements evaluator.selectNodeList(result, dom_support, ns_node, xPath, ns_node); //node pointer is NULL xtcxsl::XalanNode* node=evaluator.selectSingleNode(dom_support, ns_node, xPath, ns_node); Using command line sample SimpleXPathAPI with the sampe xml document and xPath returns a valid node. Can someone point me to what is wrong? Many thanks! -- Ovanes Markarian
