Bug #4121
closed
UnsupportedOperationException when writing to DOMResult
Applies to branch:
9.9, trunk
Fix Committed on Branch:
9.9, trunk
Fixed in Maintenance Release:
Description
A transformer with a DOMResult may fail with an UnsupportedOperationException.
The attached test works OK with Saxon-HE 9.8, but fails with 9.9.0.1 and 9.9.1.1.
The actual exception is:
java.lang.UnsupportedOperationException
at net.sf.saxon.event.Receiver.append(Receiver.java:232)
at net.sf.saxon.event.RegularSequenceChecker.append(RegularSequenceChecker.java:153)
at net.sf.saxon.event.ProxyReceiver.append(ProxyReceiver.java:234)
at net.sf.saxon.event.ComplexContentOutputter.append(ComplexContentOutputter.java:611)
at net.sf.saxon.expr.Expression.lambda$process$0(Expression.java:941)
at net.sf.saxon.om.SequenceIterator.forEachOrFail(SequenceIterator.java:128)
at net.sf.saxon.expr.Expression.process(Expression.java:941)
at net.sf.saxon.expr.instruct.TemplateRule.applyLeavingTail(TemplateRule.java:354)
at net.sf.saxon.trans.Mode.applyTemplates(Mode.java:519)
at net.sf.saxon.trans.XsltController.applyTemplates(XsltController.java:733)
at net.sf.saxon.s9api.AbstractXsltTransformer.applyTemplatesToSource(AbstractXsltTransformer.java:347)
at net.sf.saxon.s9api.XsltTransformer.transform(XsltTransformer.java:338)
at net.sf.saxon.jaxp.TransformerImpl.transform(TransformerImpl.java:71)
at TestResults.testDomResult(TestResults.java:68)
Files
- Status changed from New to In Progress
- Assignee set to Michael Kay
- Priority changed from Low to Normal
There were substantial changes in 9.9 to the interface between the Transformer and the Destination, prompted by the need to implement "sequence normalization" on the destination side (the main driver here was the introduction of the JSON and Adaptive output methods). The destination is now expected to handle any "regular sequence" which may include composed nodes as well as decomposed events, and it seems that the DomDestination is not doing this; it should insert a SequenceNormalizer into the pipeline but this is not happening, and as a result if composed nodes are sent across the interface they are rejected.
Incidentally it seems that we do have a RegularSequenceChecker in the pipeline in 9.9.1.1 as issued. The idea was that this would only be included when needed for debugging, but it probably does no harm. Its sole function is to verify that the protocol between transformer and destination is being properly adhered to.
In DOMDestination.getReceiver(), changing
return domWriter;
to
return params.makeSequenceNormalizer(domWriter);
makes the test pass. Need to regression test. JUnit test case added as DomTest.testBug4121().
- Category set to JAXP Java API
- Status changed from In Progress to Resolved
- Applies to branch trunk added
- Fix Committed on Branch 9.9, trunk added
Thank you for fixing this so quickly! It works fine now.
Just to let you know, we ran into the same issue on Saxon-HE 9.9.1.1N (.NET), with a very similar stack trace.
With the snippet posted above, we can work around this using
public class TextWriterDestination2 : TextWriterDestination
{
public TextWriterDestination2(XmlWriter writer) : base(writer)
{
}
public override Receiver getReceiver(PipelineConfiguration pipe, SerializationProperties value2)
{
return value2.makeSequenceNormalizer(base.getReceiver(pipe, value2));
}
}
instead of using the built-in TextWriterDestination when serializing into a XmlWriter (such as one returned by XDocument.CreateWriter())
I've raised the new problem as bug #4166.
- Status changed from Resolved to Closed
- % Done changed from 0 to 100
- Fixed in Maintenance Release 9.9.1.2 added
Bug issue fixed in the Saxon 9.9.1.2 maintenance release.
Please register to edit this issue
Also available in: Atom
PDF
.