XercesC setting output to UTF-8

Question

I'm using XercesC Lib to create a serialization of my data. How can I set it to UTF-8? It is always generated with UTF-16 and I can't find a way to change that.

xercesc::DOMImplementation *gRegistry = xercesc::DOMImplementationRegistry::getDOMImplementation(X("Core"));
xercesc::DOMDocument *doc = gRegistry->createDocument(
        0,                      // root element namespace URI.
        X(oDocumentName.c_str()),       // root element name
        0);                 // document type object (DTD).
doc->setXmlStandalone(true);
... prepare the document ...
serializer = ((xercesc::DOMImplementationLS *)gRegistry)->createLSSerializer();
serializer->setNewLine(xercesc::XMLString::transcode("\n"));

XMLCh *xmlresult = serializer->writeToString(doc);
char *temp = xercesc::XMLString::transcode(xmlresult);
std::string result(temp);

xercesc::XMLString::release(&temp);
xercesc::XMLString::release(&xmlresult);
doc->release();
serializer->release();
getStream() << result.c_str();

When I deserialize with JAXB on the Java side, I always get a content is not allowed in prolog and so far this is the only difference I can see in the XML. When I try to locally deserialze in JAXB it works. When I take my XercesC XML I get this error. When I try to format it in Notepad++ with the XML plugin it also says that there is an error, but doesn't tell me any details.

I'm not sure, but perhaps you should build XercesC with ICU lib. See instructions for trans-coder options here http://xerces.apache.org/xerces-c/build-3.html — Sergei Nikulov, Jun 23 '13 at 16:16

score 3 · Accepted Answer · answered Jun 23 '13 at 16:16

3

Check the usage of DOMLSOutput, that should give you exactly what you want. I.e. you create a DOMLSOutput object to which you write (instead of using DOMLSSerializer::writeToString).

answered Jun 23 '13 at 16:16

Robert

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29
47

Yes, I'm currently looking into this. According to this doc http://www.ibm.com/developerworks/library/x-serial.html, the serializer can only do UTF-16. I'm trying to implement the `MemBufFormatTarget` but I don't know how to serialize the document with that. – Devolus Jun 23 '13 at 16:40
Pretty much you'd create a `MemBufFormatTarget` and hook it up to the `DOMLSOutput`, then after that you do `DOMLSSerializer::write` to the `DOMLSOutput` object (with DOMNode being the root element of the document). Then you call `MemBufFormatTarget::getRawBuffer` and use `TranscodeFromStr` to get your XMLCh string. – Robert Jun 23 '13 at 17:00
Thanks. That `TranscodeFromStr` was the missing bit. It works now. :) – Devolus Jun 23 '13 at 17:50

XercesC setting output to UTF-8

1 Answers1