Hi, i'm a newbie on xerces, but very interested in the com wrapper. i
made some experiments with it and found out that it is problematic to
use with vbscript in that away, that it rejects byref parameters.
for instance:
dim strXML
strXML = "test.xml"
dim xmlDoc
set xmlDoc = CreateObject( "Xerces.DOMDocument" )
if xmlDoc.load( strXML ) then
...
end if
This fails for Xerces because strXML is passed as VT_VARIANT|VT_BYREF
and not as VT_BSTR. To make it running it must be ensured to pass the
parameters ByValue, for instance:
if xmlDoc( ( strXML ) ) then ...
or
if xmlDoc( CStr( strXML ) ) then ...
This behaviour makes it impossible to simply replace MSXML by Xerces. So
my question is: Shouldn't we enhance the com wrapper to accept
VT_VARIANT|BYREF arguments ? to the load function, for instance, could
be added something like:
if( V_VT( &xmlSource ) == ( VT_VARIANT | VT_BYREF ) )
{
variant_t vtString( &xmlSource );
m_FileName = vtString.operator _bstr_t();
if( 0 == m_FileName.length() )
return E_INVALIDARG;
// see if the file is relative path
if (!PathIsURL(m_FileName) &&
PathIsRelative(m_FileName)) {
// try appending baseurl if exists
_bstr_t baseURL;
if (S_OK == GetBaseURL(baseURL)) {
// change any backslashes to slashes
LPTSTR loc =
_tcschr(m_FileName,_T('\\'));
while (loc != NULL) {
*loc = _T('/');
loc =
_tcschr(m_FileName,_T('\\'));
}
m_FileName = baseURL + _T("/") +
m_FileName;
}
}
}
Another question i have is why the resolveExternals property is
disabled. As far as i can see in the DOMCount project, Xerces should
support this feature.
Regards,
Dr. Olaf Groeger
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