For some reason this does not look quite right. I believe that arguments to Xerces API calls besides filenames are supposed to be UTF16.
You better check the API documentation to be sure: http://xml.apache.org/xerces-c/apiDocs/index.html Maybe do a Google query against it with the 'site:' operator. Here's a function that will help you out with this if you need UTF16: // widen function // Converts ASCII std::string to XMLCh array. // NOTE: Caller must delete XMLCh array when finished with it. XMLCh* widen(const std::string& src) { // Allocate buffer. XMLCh* dest = new XMLCh[src.length() + 1]; // Copy from string to buffer. std::string::size_type i; for (i=0; i < src.length(); ++i) dest[i]=(XMLCh)src[i]; // Add NULL byte. dest[i+1]=0; // Return const pointer to array. return dest; } I used it to convert some US-ASCII strings to UTF16 in some cases where stuff was going wrong for me. HTH! Matt -----Original Message----- From: Gierschner, Frank [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 18, 2005 8:46 AM To: [email protected] Subject: Failure to assign/relate an in-memory schema to an in-memory xml Hi all. I have some experience with XML in general but I am new to Xerces, so please provide some hints. I wish to schema-validate an in-memory xml-string, coming in from a CORBA client, against an in-memory schema. But the parser (DOMBuilder) does not seem to associate the xml-data with the provided schema. I provide both from within MemBufInputSource and I am unaware of the real functionalty of the so-called 'fake system id'(argument 3: bufId) and if it has something to do with the failure. I even considered to write the schema temporarily to a xsd-file, build a DOM from the incoming xml-string, adding a schemaLocation attribute to the still unvalidated DOM, serializing this DOM into a new string and the reparsing and validating against the xsd-file but that seems error-prone, cumbersome and does not work yet, too. I provided some test results I encountered when dealing with files and the interesting part of the code below. I would appreciate your help. Thanks in advance. Frank Gierschner // small excerpt on dealing with files now In order to get track of the problem I modified the SCMPrint example around line 335 to be: <code> parser->loadGrammar(xsdFile, Grammar::SchemaGrammarType, true); if (handler.getSawErrors()) { handler.resetErrors(); } else { parsedOneSchemaOkay = true; } parser->parse(xmlFile); // NEW </code> where xmlFile denotes a file which is a XML-Document having a schemaLocation attribute directing to xsdFile. If in this case xmlFile contains an invalid document the previously applied ErrorHandler will see fatal errors - that is correct. But when I remove the schemaLocation attribute from xmlFile the same procedure results in errors like 'unknown element ...' which reveal that xml-data and schema seem to be unrelated. I guess the latter is the same problem occuring with the above stated in-memory procedure. // end of excerpt The interesting part of the code I use for the in-memory variant looks somewhat like the following: <code> // the in memory schema static const char gMySchema[] = "<?xml version=\"1.0\" encoding=\"utf-8\" ?> \ <xs:schema xmlns:xs=\"http://www.w3.org/2001/XMLSchema\"; targetNamespace=\"urn:rtc:tgam:MNCfgTmpl\" \ elementFormDefault=\"qualified\" attributeFormDefault=\"unqualified\"> \ <xs:element name=\"root\"> \ <xs:complexType> \ <xs:sequence> \ <xs:element name=\"FirstElement\" type=\"xs:string\" /> \ <xs:element name=\"SecondElement\" minOccurs=\"0\" type=\"xs:string\" /> \ <xs:element name=\"ShirdElement\" type=\"xs:string\" /> \ </xs:sequence> \ </xs:complexType> \ </xs:element> \ </xs:schema> \ "; ... -- omitted other stuff -- static DOMBuilder * getDOMBuilder(MyDOMErrorHandler *& myErrorHandler, const char pSchema2use[], Grammar *& grammar) { DOMImplementation *impl = DOMImplementationRegistry::getDOMImplementation(L"LS"); DOMBuilder* theBuilder = ((DOMImplementationLS*)impl)->createDOMBuilder(DOMImplementationLS::MODE_SYN CHRONOUS, L"http://www.w3.org/2001/XMLSchema";); if (theBuilder->canSetFeature(XMLUni::fgDOMNamespaces, true)) theBuilder->setFeature(XMLUni::fgDOMNamespaces, true); if (theBuilder->canSetFeature(XMLUni::fgDOMValidation, true)) theBuilder->setFeature(XMLUni::fgDOMValidation, true); if (theBuilder->canSetFeature(XMLUni::fgDOMDatatypeNormalization, true)) theBuilder->setFeature(XMLUni::fgDOMDatatypeNormalization, true); if (theBuilder->canSetFeature(XMLUni::fgXercesSchemaFullChecking, true)) theBuilder->setFeature(XMLUni::fgXercesSchemaFullChecking, true); myErrorHandler = new MyDOMErrorHandler(); theBuilder->setErrorHandler(myErrorHandler); if (pSchema2use) { grammar = NULL; MemBufInputSource *myXSDInputSource = new MemBufInputSource((const XMLByte *const)gMySchema, (unsigned int) strlen(gMySchema), L"http://www.w3.org/2001/XMLSchema";, false); // unaware about functionality of argument 3 Wrapper4InputSource wrapper(myXSDInputSource); // will adopt myXSDInputSource grammar = theBuilder->loadGrammar(wrapper, Grammar::SchemaGrammarType); } return theBuilder; } ... -- omitted other stuff -- static int buildDOMDocument(const XMLByte* const buf, const unsigned int uiSize, DOMDocument* &doc) { DOMBuilder* theBuilder = NULL; MyDOMErrorHandler* myErrorHandler = NULL; Grammar *grammar = NULL; theBuilder = getDOMBuilder(myErrorHandler, gMySchema, grammar); // see above MemBufInputSource *myInputSource = new MemBufInputSource(buf, uiSize, L"TEST", false); // unaware about functionality of argument 3 Wrapper4InputSource wrapper(myInputSource); // will adopt myInputSource int retVal = -1; try { DOMDocument* newDoc = theBuilder->parse(wrapper); retVal = (myErrorHandler->sawFatals() ? -9 : (myErrorHandler->sawErrors() ? -5 : 0)); if (newDoc) doc = (DOMDocument*) newDoc->cloneNode(true); } catch (const XMLException& toCatch) { cout << "Exception message is: \n" << X2c(toCatch.getMessage()) << "\n"; } catch (const DOMException& toCatch) { cout << "Exception message is: \n" << X2c(toCatch.msg) << "\n"; } catch (...) { cout << "Unexpected Exception \n" ; } theBuilder->release(); delete myErrorHandler; return retVal; } // the in-memory xml created previously via ... ... DOMImplementation* impl = DOMImplementationRegistry::getDOMImplementation(L"Range"); DOMDocumentType* doctyp= 0; // impl->createDocumentType(L"root", NULL, L"TEST"); DOMDocument* doc = impl->createDocument(L"urn:rtc:tgam:MNCfgTmpl", L"root", doctyp); doc->setEncoding(L"UTF-8"); // doc->setDocumentURI(L"http://www.w3.org/2001/XMLSchema-instance";);// xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; ??? DOMElement* root = doc->getDocumentElement(); ... // ... and generated via serialization by DOMWriter::writeNode() from this DOMDocument (from an example) looks like this <?xml version="1.0" encoding="UTF-8" standalone="no" ?> <root xmlns="urn:rtc:tgam:MNCfgTmpl"> <FirstElement>aTextNode</FirstElement> <ThirdElement>aTextNode2</ThirdElement> </root> </code> ___________________________________________________________________ The information contained in this message and any attachment may be proprietary, confidential, and privileged or subject to the work product doctrine and thus protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. 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