RE: XMLFilter in a URIResolver

When you supply a SAXSource to Saxon, Saxon sets the properties of the
XMLReader supplied with the SAXSource to make sure that it is reporting
namespaces in the way that Saxon requires. Specifically it does:

     	parser.setFeature("http://xml.org/sax/features/namespaces",
true);
 
parser.setFeature("http://xml.org/sax/features/namespace-prefixes",
false);

A SAX2 parser is expected to recognize these properties; if it responds
to these requests with an exception, Saxon complains with the error
message that you saw.

Your XMLFilter is pretending to be a SAX2 parser, so it must support
these methods properly.

Michael Kay


> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Andrew Welch
> Sent: 11 September 2003 14:03
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: RE:  XMLFilter in a URIResolver
> 
> 
> > Create a SAXSource, whose InputSource is the actual XML file, and
> whose
> > XMLReader is the XMLFilter. Return the SAXSource as the 
> result of the 
> > URIResolver.
> > 
> > (untested)
> 
> Thanks Mike,
> 
> I now get the error,
> 
> Warning: The SAX2 parser does not support a required namespace feature
> 
> Which I guess is related to the XMLFilter, which looks like:
> 
> public void startElement(String namespaceURI, String 
> localName, String qualifiedName, Attributes atts) throws 
> SAXException {
> 
>  AttributesImpl newAttributes = new AttributesImpl(atts);  
> newAttributes.addAttribute("", "elementID", "elementID", "",
> counter+"");
>  atts = newAttributes;
>  counter++;
>         
>  super.startElement(namespaceURI, localName, qualifiedName, atts); }
> 
> This method simply adds @elementID to each element.
> 
> 
> The code that calls this (in the resolver) is:
> 
> SAXSource s = new SAXSource();
> s.setInputSource(new InputSource(is));
> s.setXMLReader(addElementIdToXML);   
> return s;
> 
> I'm using Saxon 7.6.5a and crimson.  Do I need to set the 
> XMLReader on the XMLFilter??  Or am I missing the point?  
> When I do set it, the XMLFilter seems to be ignored.  When 
> its not set, I get the error. Surely I need to set it...
> 
> Still confused,
> 
> andrew
> 
> 
> 
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> 


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