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https://issues.apache.org/jira/browse/XERCESJ-1365?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mukul Gandhi updated XERCESJ-1365:
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Attachment: assert patch_21.04.09.txt
assertions xpath2 impl src_21.04.09.zip
I am providing a fix to the issue, mentioned in comment 1 related to XPath 2.0
evaluation with psychopath processor.
Now it's possible to have the context of XPath 2.0 evaluation, as the top most
element (as required in the XML Schema 1.1 spec).
I have created a new class, PsychopathNodeEvaluator.java to support this (I
thank Ken Cai for suggesting a solution for this). The class,
XMLAssertPsychopathImpl.java is also modified as well.
No other files in the patch are modified. I am providing all the latest files
again along with the latest patch diff file.
Now I am happy with the assertion code we have written, so far.
I would be waiting for the feedback from the Xerces team, about this patch.
Regards,
Mukul
> assertions XPath 2.0 patch
> --------------------------
>
> Key: XERCESJ-1365
> URL: https://issues.apache.org/jira/browse/XERCESJ-1365
> Project: Xerces2-J
> Issue Type: Improvement
> Components: XML Schema 1.1 Structures
> Affects Versions: 2.9.1
> Environment: JRE 1.5.x
> Reporter: Mukul Gandhi
> Assignee: Khaled Noaman
> Attachments: assert patch_21.04.09.txt, assertions test cases.zip,
> assertions xpath2 impl src_21.04.09.zip, XMLSchema11Test.java
>
>
> I am pleased to provide a patch with almost complete implementation of XML
> Schema 1.1 assertions. Some things might have been overlooked (though not
> anything major it seems to me), and I am continuing finding and correcting
> any known issues.
> This JIRA issue provides a complete implementation of XML Schema 1.1
> assertions, in combination with the current code in SVN.
> This JIRA issue supersedes the issue,
> https://issues.apache.org/jira/browse/XERCESJ-1363. Kindly abort/cancel the
> issue XERCESJ-1363 and review this one instead.
> I am providing all the necessary files for review that affect assertions (the
> files for the issue, XERCESJ-1363 are also available in this JIRA issue).
> This code submission provides XPath 2.0 interface with the Psychopath
> processor. Psychopath processor is presently not 100% compliant to the XPath
> 2.0 spec. It's capabilities and limitations are mentioned in the document,
> http://psychopath.sourceforge.net/report.pdf. Kindly be aware, that failure
> to evaluate some legal XPath 2.0 expressions, would most likely be because of
> limitations of Psychopath.
> There is another issue I am aware of with the current assertions code I am
> submitting.
> For e.g., if there is assertions declaration like following:
> <xs:element name="A">
> <xs:complexType>
> <xs:sequence>
> <!-- something -->
> </xs:sequence>
> <xs:assert test="exists(@x)" />
> </xs:complexType>
> </xs:element>
> The <xs:assert above would test if there is an attribute 'x' on the element
> 'A'. If attribute 'x' is actually present on element 'A', the above assertion
> should evaluate to true (this is I think, what the XML Schema 1.1 spec says).
> But with the Psychopath processor, I am facing a problem, that I have to
> write the above assertion as following, to work correctly:
> <xs:assert test="exists(root/@x)" /> or perhaps, <xs:assert
> test="exists(*/@x)" />
> For the above Schema example, a DOM is being built whose root element is 'A'.
> The Psychopath processor assumes a context node as / (i.e., the XPath 2.0
> document node) while evaluating XPath expressions (when it is supplied with a
> DOM). So at present with Psychopath processor, one must descend one step
> extra while writing XPath expressions.
> I am working on this issue, and would post a fix, when I find a solution.
> I would provide some test cases as well after some time.
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