Re: problem with WFXMLScanner

[John Merrells]

This is a bug in the 2.5 release code. DB XML users are advised
to use the 2.4 code, or if they feel brave to pull the sources directly
from CVS.

John

On 14 Jul 2004, at 19:01, Jesse Pelton wrote:

That doesn't look like the current code. What version of Xerces are you
using? What platform and compiler?

-----Original Message-----
From: Joshua Theman [mailto:[EMAIL PROTECTED]
Sent: Wednesday, July 14, 2004 1:56 PM
To: [EMAIL PROTECTED]
Subject: problem with WFXMLScanner

I hope this list is an appropriate place to ask this question; I've
spent quite a bit of time grepping and reading the source, and I think
this is my best bet.

I'm trying to use the xerces-c library through the Sleepycat DB XML
software package, and I consistently have an exception thrown from the
following line in the WFXMLScanner class:

// check for duplicate namespace attributes:
// by checking for qualified names with the same local part and with
prefixes
// which have been bound to namespace names that are identical.
XMLAttr* loopAttr;
XMLAttr* curAtt;
for (unsigned int attrIndex=0; attrIndex < attCount-1; attrIndex++)
{
loopAttr = fAttrList->elementAt(attrIndex);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
for (unsigned int curAttrIndex = attrIndex+1; curAttrIndex <
attCount; curAttrIndex++) {
curAtt = fAttrList->elementAt(curAttrIndex);
if (curAtt->getURIId() == loopAttr->getURIId() &&
XMLString::equals(curAtt->getName(),
loopAttr->getName())) {
emitError
(
XMLErrs::AttrAlreadyUsedInSTag
, curAtt->getName()
, elemDecl->getFullName()
);
}
}
}

This is from the scanStartTagNS method in the WFXMLScanner.cpp file. The
method
fAttrList->elementAt is throwing an ArrayIndexOutofBoundsException. I
realize this has to do with
software besides simply xerces, but just from looking over this method's
code, it doesn't look like it should ever throw an exception right here,
regardless of how badly deformed the XML file is. I've run a few
different test programs, and all of them have the same result: I simply
can't call the putDocument method without generating an exception. Here
is one small test program that reproduced the error for me:

#include "dbxml/DbXml.hpp"
#include "db_cxx.h"
using namespace DbXml;

int main()
{
    XmlContainer container(NULL, "test.dbxml");
    container.open(NULL, DB_CREATE);

    XmlDocument document;
    document.setContent("<testing><a><b><c></c></b></a></testing>");

    try {
        container.putDocument(NULL, document);
    }
    catch (std::exception &e) {
        std::cerr << e.what() << std::endl;
    }

    return 0;
}

Here is the output:

$ ./add_doc
Error: XML Indexer: Fatal parse error in document '', line 1, char 10.
Parser Error Message: An
exception occurred! Type:ArrayIndexOutofBoundsException, Message:The
passed index is past the end of the vector

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