Issues with DOMWriter::writeToString

["Pranav, Savkur" <Pr...@siemens.com>]

Hello,
	We're using the writeToString API of DOMWriter to get back the
XML String when a root node is given.
Following is a code snippet:

ReadXMLNode(const XERCES_CPP_NAMESPACE::DOMNode *const p_pDOMNode)
{
	TRACE_INFO("Entering XH_DOMTreeHelper::ReadXMLNode()");

	SIFRetCode sifRetCode = ERR_FAILURE;

	CString strRetVal;
	
	//Validate the input parameters
	if(0 == p_pDOMNode)
	{
		TRACE_ERROR("ERROR: Given Node is NULL,hence
ERR_INCORRECT_PARAMS is returned",ERR_INCORRECT_PARAMS);
		TRACE_INFO("Leaving XH_DOMTreeHelper::SaveXMLNode()");
		return ERR_INCORRECT_PARAMS;
	}

	bool bIsFormatPrettyPrintNeeded = true;
	XERCES_CPP_NAMESPACE::DOMWriter         *pSerializer = 0;
	try
	{
		// get a serializer, an instance of DOMWriter		
		XMLCh tempStr[100];
		XERCES_CPP_NAMESPACE::XMLString::transcode("LS",
tempStr, 99);

		XERCES_CPP_NAMESPACE::DOMImplementation *impl          =
XERCES_CPP_NAMESPACE::DOMImplementationRegistry::getDOMImplementation(te
mpStr);

		pSerializer =
((XERCES_CPP_NAMESPACE::DOMImplementationLS*)impl)->createDOMWriter();


		if(0 == pSerializer)
		{
			TRACE_ERROR("ERROR: Internal DOM Error. -
createDOMWriter failed",ERR_DOM_OPERATION_FAILED);
			TRACE_INFO("Leaving
XH_DOMTreeHelper::ReadXMLNode()");
			return ERR_DOM_OPERATION_FAILED;
		}	
		strRetVal = pSerializer->writeToString(*p_pDOMNode);
		delete pSerializer;
		pSerializer = 0;
	}

	catch (XERCES_CPP_NAMESPACE::XMLException& e)
	{
		TRACE_INFO("Caught an exception in
XH_DOMTreeHelper::ReadXMLNode()");
		CString cstrTraceMsg;
		cstrTraceMsg.Format(_T("ERROR: Internal DOM Error - An
error occurred during creation of output transcoder. Exception code: %d
Msg is : %s"), e.getCode(),e.getMessage());		
	
TRACE_ERROR(CLString(cstrTraceMsg),ERR_DOM_OPERATION_FAILED);

		delete pSerializer;
		pSerializer = 0;	

		sifRetCode = ERR_DOM_OPERATION_FAILED;
	}
	catch(...)
	{
		TRACE_INFO("Caught an exception in
XH_DOMTreeHelper::ReadXMLNode()");

		delete pSerializer;
		pSerializer = 0;
	
		sifRetCode = ERR_DOM_OPERATION_FAILED;
	}	
	TRACE_INFO("Leaving XH_DOMTreeHelper::ReadXMLNode()");
	return strRetVal;
}

Is this code correct?Must the memory allocated to the tempstr in :
"XMLCh tempStr[100];" be increased if the string to be returned is a
longer string?
Are the getDOMImplementation,createDOMWriter and writeToString methods
threadsafe?

Pls reply.

Regards,
Pranav



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