RE: problem with absolute paths when writing XML using Xerces 3.0.1

[John Lilley]

I don't know about the absolute path, but you need to delete/release resources 
in the opposite order that they were created.
john

-----Original Message-----
From: Dave Cavell [mailto:penguin.pi...@googlemail.com] 
Sent: Wednesday, May 26, 2010 4:09 AM
To: c-users@xerces.apache.org
Subject: problem with absolute paths when writing XML using Xerces 3.0.1

Hi, never used a mailing list before, so i hope i am doing it correctly. I
have the following function i wrote to create an XML file using Xerces
3.0.1, if i call this function with a filePath of "foo.xml" or "../foo.xml"
it works great, but if i pass in "c:/foo.xml" then i get an exception on
this line:

XMLFormatTarget *formatTarget = new LocalFileFormatTarget(
targetPath);

can someone explain why my code works for relative paths, but not absolute
paths please? many thanks.


const int ABSOLUTE_PATH_FILENAME_PREFIX_SIZE = 9;

void OutputXML(xercesc::DOMDocument* pmyDOMDocument, std::string filePath)
{
    //Return the first registered implementation that has the desired
features. In this case, we are after a DOM implementation that has the LS
feature... or Load/Save.
    DOMImplementation *implementation =
DOMImplementationRegistry::getDOMImplementation(L"LS");

    // Create a DOMLSSerializer which is used to serialize a DOM tree into
an XML document.
    DOMLSSerializer *serializer =
((DOMImplementationLS*)implementation)->createLSSerializer();

    // Make the output more human readable by inserting line feeds.
    if
(serializer->getDomConfig()->canSetParameter(XMLUni::fgDOMWRTFormatPrettyPrint,
true))

serializer->getDomConfig()->setParameter(XMLUni::fgDOMWRTFormatPrettyPrint,
true);

    // The end-of-line sequence of characters to be used in the XML being
written out.
    serializer->setNewLine(XMLString::transcode("\r\n"));

    // Convert the path into Xerces compatible XMLCh*.
    XMLCh *tempFilePath = XMLString::transcode(filePath.c_str());

    // Calculate the length of the string.
    const int pathLen = XMLString::stringLen(tempFilePath);

    // Allocate memory for a Xerces string sufficent to hold the path.
    XMLCh *targetPath =
(XMLCh*)XMLPlatformUtils::fgMemoryManager->allocate((pathLen +
ABSOLUTE_PATH_FILENAME_PREFIX_SIZE) * sizeof(XMLCh));

    // Fixes a platform dependent absolute path filename to standard URI
form.
    XMLString::fixURI(tempFilePath, targetPath);

    // Specify the target for the XML output.
    XMLFormatTarget *formatTarget = new LocalFileFormatTarget(targetPath);
    //XMLFormatTarget *myFormTarget = new StdOutFormatTarget();

    // Create a new empty output destination object.
    DOMLSOutput *output =
((DOMImplementationLS*)implementation)->createLSOutput();

    // Set the stream to our target.
    output->setByteStream(formatTarget);

    // Write the serialized output to the destination.
    serializer->write(pmyDOMDocument, output);

    // Cleanup.
    serializer->release();
    XMLString::release(&tempFilePath);
    delete formatTarget;
    output->release();
}