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
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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
