[jboss-as7-dev] Validation of XML Parsers / Schemas

[Brian Stansberry]

Can this be done without *requiring* changes to subsystems?

ExtensionParsingContext.setSubsystemXmlMapping(String namespaceUri, 
XMLElementReader<List<ModelNode>> reader) is a stable API that we cannot 
break.

A new method could be added to register a parser that requires a 
ValidatingXmlReader to be passed in, but we can't force subsystems to 
change their impl's

public void readElement(final XMLExtendedStreamReader reader, final 
List<ModelNode> list) throws XMLStreamException

to

public void readElement(final ValidatingXmlReader reader, final 
List<ModelNode> list) throws XMLStreamException

On 9/27/11 11:42 AM, Darran Lofthouse wrote:
> The topic of how to validate the XML parsers or the schemas crops up
> every now and again.
>
> I have been having a couple of ideas of how we could at some point look
> into this: -
>
> http://community.jboss.org/docs/DOC-17243
>
> The proposed idea actually covers two parts: -
>     - A wrapper around the existing API that allows the parsers to just
> request the elements / attributes they require and leave the wrapper to
> handle all the error handling we currently have distributed across the
> parsers.
>
>    - This then allows us during testing to validate that the calls match
> the structure defined in the schema.
>
> I may try prototyping something other the weekend but thought I would
> put this out there and see if anyone has any thoughts / comments.
>
> Regards,
> Darran Lofthouse.
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-- 
Brian Stansberry
Principal Software Engineer
JBoss by Red Hat