Re: [xml] Clone the reader?

[Daniel Veillard <veillard redhat com>]

On Wed, Feb 10, 2010 at 04:58:05PM +0100, Csaba Raduly wrote:
> Hi,
> I'm using the xmlreader interface to parse a document defined by a
> schema. When there is a node defined by a union
>
> <xsd:simpleType name="MyUnion3">
>   <xsd:union memberTypes="xsd:string xsd:boolean xsd:decimal xsd:time
> xsd:float xsd:double">
>   </xsd:union>
> </xsd:simpleType>
>
> processing is supposed to try all alternatives (try to decode it as a
> string, then as a boolean, etc) until one is successful. However, this
> would require the reader to back up each time, which doesn't appear to
> be possible. Is there a way to implement this, perhaps by cloning the
> parser at that point for each alternative ?

  The reader is somehow a wrapper around a parser, and a parser can't be
"cloned". But in your case I really don't see why you would need to
roll back in parsing...that's not needed just check the value. Though I
really don't see how you're gonna be able to desambiguate between
options for example xsd:float and xsd:double ... That schemas makes no
sense to me...

Daniel

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