FW: NEWBIE: trying to retrieve node value from xml string in mem

[Williams Roger <RW...@OLDMUTUAL.com>]

I have two problems

First: When I try to execute the parse member function by passing it a
memory buffer, The DOM_Node I get is NULL. But when I pass it a file with
the exact same contects of the memory buffer. I get a Node.

Second: When I do get a DOM_Node that is not null, I cannot get the value of
the element. by using the member function getNodeValue. However, I do get
the  Node Name by using the member function getNodeName, which is
successfull.

I am new to XML , and i am trying to check randomly(not sequentially) if a
particular tag exists, and if it exist, to extract its value. And I want to
do this by parsing not from a file , but from memory(ie, I am getting a
char* as input).

Can anybody assist/help me

here is what I tried(win32 console app):

#include <stdlib.h>
#include <string.h>
#include <iostream.h>
#include <stdio.h>
#include <afx.h>
#include <parsers/SAXParser.hpp>
#include <framework/MemBufInputSource.hpp>
#include <util/PlatformUtils.hpp> 
#include <parsers/DOMParser.hpp> 
#include <dom/DOM_NodeList.hpp>
#include <dom/DOM_Node.hpp> 

int main() {
	char*  gXMLInMemBuf =
	"<locprop>\n\tlocation property
1\n\b</locprop>\n<updprop>\n\t\bupdate property\n\b</updprop>\n";

/*"<locprop>\n\
	location property 1\n\
</locprop>\n\
<updprop>\n\
	update property\n\
</updprop>\n\
";
*/	printf("\n%s\n",gXMLInMemBuf);	
static const char*  gMemBufId = "prodInfo";

	try
    {
         XMLPlatformUtils::Initialize();
    }
    catch (const XMLException& toCatch)
    {
         cerr << "Error during initialization! Message:\n"
		
              << /*StrX*/(toCatch.getMessage()) << endl;
         return 1;
    }

	//MemBufInputSource* memBufIS;
	const XMLByte* pXmlByte=NULL;
	pXmlByte = (const XMLByte*) gXMLInMemBuf;
	MemBufInputSource * memBufIS;
	try {
		
		memBufIS = new MemBufInputSource
		(
			(const XMLByte*)gXMLInMemBuf
			, sizeof(gXMLInMemBuf)
			, gMemBufId
			, false
		);
	}	
	catch (const XMLException& pE) {
		printf("\nexcpetion\n");
	}

	/*DOMParser parser;
	parser.parse(*memBufIS);
	DOM_Document DomDoc = parser.getDocument();
	DOM_NodeList List;
	List = DomDoc.getElementsByTagName("*");
	int n=0;
	DOM_Node Node = List.item(n);
	if (Node==NULL) 
		return 0;
	DOMString dstrVal = Node.getNodeValue();
	
	char* strVal=dstrVal.transcode();
	cout<<"\nVal:\t"<<strVal<<"\n";
	//parser.~DOMParser;
	*/
	try {
		DOMParser *pParser=NULL;
		pParser = new DOMParser;
		//pParser->parse(*memBufIS);
		pParser->parse("c:/myxml.xml");
		DOM_Document *pDomDoc=NULL;
		pDomDoc = new DOM_Document(pParser->getDocument());
		DOM_NodeList *pNodeList=NULL;
		pNodeList = new
DOM_NodeList(pDomDoc->getElementsByTagName("*")); 
		//DOM_Node *pNode=NULL;
		//pNode = new DOM_Node(pNodeList->item(0));
		DOM_Node Node = pNodeList->item(0);
		if(Node==NULL)
			return 0;
		unsigned int ln = 0;
		ln = pNodeList->getLength();
		short NodeType = 0;
		NodeType = Node.getNodeType();
		DOMString dsVal=Node.getNodeName(); //when replacing
getNodeName with getNodevalue, dsVal is NULL
		char *szVal = dsVal.transcode();
		cout<<"\n"<<szVal<<"\n";
	}
	catch(XMLException *pE) {
		pE->getMessage();
	}
	
	//I also further catches here for the Dom classes

	return 0;
}
 

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