Hi Hiranya,
Interestingly, I have found an easy way to validate a Schema
document. We just need to use the JAXP validation API (which will be
visible to the user normally).
Below is a code snippet for this:
SchemaFactory sf = SchemaFactory.newInstance ..
sf.setErrorHandler ..
Schema s = sf.newSchema(new StreamSource(schemapath));
The 'newSchema' call would not succeed if XML Schema has an error.
The XSModel or the Grammar technique you wrote, is a low level API
which is normally used within Xerces.
On Fri, Jun 12, 2009 at 11:49 AM, Mukul Gandhi<gandhi.mu...@gmail.com> wrote:
>> By going through the Xerces samples I came up with the following code to
>> validate an XML schema document.
>>
>> XMLGrammarPreparser preparser = new XMLGrammarPreparser();
>> preparser.registerPreparser(XMLGrammarDescription.XML_SCHEMA, null);
>> preparser.setFeature("http://xml.org/sax/features/namespaces";,
>> true);
>> preparser.setFeature("http://xml.org/sax/features/validation";,
>> true);
>>
>> preparser.setFeature("http://apache.org/xml/features/validation/schema";,
>> true);
>> preparser.setErrorHandler(new MyErrorHandler());
>> Grammar g =
>> preparser.preparseGrammar(XMLGrammarDescription.XML_SCHEMA,
>> new XMLInputSource(null, xsdUrl, null));
>>
>> This seems to be working really well. It even validates any imported schemas
>> etc. All the errors are reported to the registered error handler. WDYT about
>> this approach over the XSModel construction approach?
>
> I think, you can use either of the approaches. The XSModel approach I
> mentioned also validates imported schemas as well.
>
> Infact, the 'loadURI' method I mentioned, builds XSModel from the
> Grammar object (it does something like, ((XSGrammar)
> fSchemaLoader.loadGrammar(new XMLInputSource(null, uri,
> null))).toXSModel().
--
Regards,
Mukul Gandhi
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