Re: [xml] Why structured error callback registered on sax handler be called to raise schema validation error?

[Daniel Veillard <veillard redhat com>]

On Fri, Oct 24, 2008 at 01:18:28PM +0530, Rabi Narayan Sahoo wrote:
> Hi
> 
> We use xmlSchemaValidateStream() function to validate an input based on a
> flow of SAX event from the parser.
> 
> When some validation error occurs, to raise that error subsequently
> __xmlRaiseError() is called by the libxml.
> 
> But for the schema validation error the structured error callback registered
> on the sax handler
> 
> is not called because of the following piece of code in __xmlRaiseError ()
> controlling the call
> 
> if ((domain == XML_FROM_PARSER) || (domain == XML_FROM_HTML) ||
> 
>         (domain == XML_FROM_DTD) || (domain == XML_FROM_NAMESPACE) ||
> 
>        (domain == XML_FROM_IO) || (domain == XML_FROM_VALID)) {
> 
>        ctxt = (xmlParserCtxtPtr) ctx;
> 
>        if ((schannel == NULL) && (ctxt != NULL) && (ctxt->sax != NULL) &&
> 
>            (ctxt->sax->initialized == XML_SAX2_MAGIC))
> 
>            schannel = ctxt->sax->serror;
> 
>     }
> 
>     
> 
> For a schema validation error this domain is XML_FROM_SCHEMASV. 
> 
> My question is why for the schema validation errors we can't call the
> structured error callback registered on the SAX Handler?

  That looks like an oversight. What happens if you patch that code to
allow that domain ? if that works send a patch,

  thanks,

Daniel

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