CXF-8966 : Validation of nillable tags fails

[f2par0]

Change xml validation strategy to use the Woodstox validation when reading instead of having a reader and a writer to a nulloutput because this method is not able to handle the xsi:nil=true attributes.

Previous Algorithm :

• Transform the input to a DOMSource Object
• create a XMLReader from this new object and a XMLWriter to a nulloutput
• setup the wookdstock validation on the writer if possible
• Create a filtered Reader to remove external references
• Copy the filterReader to the Null Writer
• if setup fails, use XOP validation

Suggested algorithm :

• create a filtered reader from the input to remove external references
• setup the wookdstock validation on the reader if possible
• call read
• if setup fails, use XOP validation

[reta]

@f2par0 thank you for attempt to fix the issue, I believe the issue is identified here FasterXML/woodstox#179 and it seems like the issue is not within CXF or Woodstox but MSV

[f2par0]

Yes, thanks for finding this issue. So this PR is more a workaround to avoid to call MSV writer.

[reta]

Yes, thanks for finding this issue. So this PR is more a workaround to avoid to call MSV writer.

I would prefer the wait for fix to come from upstream if possible and not merge any workarounds

[ppalaga]

FasterXML/woodstox#179 is a Woodstox issue after all - see FasterXML/woodstox#179 (comment)

[ppalaga]

A fix for FasterXML/woodstox#179 is underway: FasterXML/woodstox#187

[NiasSt90]

Why not change in general the approach to run the validation on reader-side instead of on a (dummy) writer during a additional copy process?

I like the approach of these PR here to change.....

I've tried it by myself here in a similar way.

[ppalaga]

Sorry for the delay, FasterXML/woodstox#187 got stuck due to legal issues with the CLA. I hope those get resolved soonish.