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Bug #1675

closed

Transforming parentless element on .NET

Added by Michael Kay over 11 years ago. Updated about 11 years ago.

Status:
Closed
Priority:
Normal
Assignee:
O'Neil Delpratt
Category:
.NET API
Sprint/Milestone:
-
Start date:
2013-01-08
Due date:
% Done:

100%

Estimated time:
Legacy ID:
Applies to branch:
Fix Committed on Branch:
Fixed in Maintenance Release:
Platforms:

Description

From Max Toro on the Saxon help list:

I'm using Saxon-HE 9.4.0.6 for .NET

I'm having trouble with a transformation that uses a root element node

(doesn't have a parent document node) as initial context node. I get a

NullReferenceException on Saxon.Api.XsltTransformer.Run(XmlDestination

destination), looking with reflector I suspect the issue might be with

one of these lines:

DocumentInfo doc = this.initialContextNode.getDocumentRoot();

        this.controller.registerDocument(doc, (doc.getBaseURI() ==

null) ? null : new DocumentURI(doc.getBaseURI()));

I think it's trying to get the root node as a document node, which it

isn't. This element node is constructed in an XSLT transformation,

passed as argument to an integrated extension function which uses it

as initial context node in a new transformation, which is the one that

fails.

Besides the NullReferenceException, does XSLT allow you to start a

transformation with a parentless element?

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 #1

Updated by Michael Kay over 11 years ago

My response: Yes, the specification allows a parentless element to be supplied as the

initial context node, and it's an oversight in the implementation (and

the test cases) that this isn't working. We'll treat it as a bug.

Note: I've checked that this works on Java (with an amended version of the unit test TestQueryToTransform. We need a similar test on .NET.

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 #2

Updated by O'Neil Delpratt over 11 years ago

  • Status changed from New to In Progress

So far I have managed to reproduce the exception with a test case. Currently investigating.

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 #3

Updated by O'Neil Delpratt over 11 years ago

  • Status changed from In Progress to Resolved

A parentless element returns null on a getDocumentRoot() call, therefore I have added a conditional statement to the code in question: @this.controller.registerDocument(doc, (doc.getBaseURI() == null) ? null : new DocumentURI(doc.getBaseURI()));@, which prevents the NullReferenceException from being thrown.

Bug fixed and committed to subversion. Thanks to Max for the pointer.

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 #4

Updated by O'Neil Delpratt about 11 years ago

  • Status changed from Resolved to Closed
  • % Done changed from 0 to 100
  • Fixed in version set to 9.4.0.7

Bug closed. Fixed in Saxon maintenance release 9.4.0.7

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