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https://issues.apache.org/jira/browse/XERCESJ-1391?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mukul Gandhi updated XERCESJ-1391:
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Attachment: (was: test.xml)
> XML Schema 1.1, inheritable attributes implementation
> -----------------------------------------------------
>
> Key: XERCESJ-1391
> URL: https://issues.apache.org/jira/browse/XERCESJ-1391
> Project: Xerces2-J
> Issue Type: New Feature
> Components: XML Schema 1.1 Structures
> Affects Versions: 2.9.1
> Reporter: Mukul Gandhi
> Assignee: Khaled Noaman
> Attachments: inhr_attr_patch.txt, test.xsd
>
>
> Hi all,
> I have written an implementation, for XML Schema 1.1 inheritable
> attributes. I am creating this JIRA issue for inheritable
> attributes, with a patch.
> I think, that a review of these changes would be good before we commit these
> changes to SVN server. This will help to ensure the correctness of
> implementation, and better quality of the code.
> I request, that this JIRA issue be assigned to the appropriate reviewer.
> Below are some implementation details, and a bit of design thinking I have in
> mind, for inherited attributes implementation.
> This patch has all the implementation for attribute traversal changes, and
> also some changes in XMLSchemaValidator.java
> (which are currently not finalized, but I plan to use these changes in CTA
> and assertions enhancements, for inheritable
> attributes).
> I am also attaching a dummy XML and XSD files, which I used to verify the
> attribute traversal changes. The attached XML is
> valid, for the given XSD, using the current XML Schema 1.1 code in SVN, plus
> this patch that I have written.
> As mentioned above, apart from attribute traversal changes (which are working
> fine, and tested at my end), the following code has been written in
> XMLSchemaValidator.java, which I plan to use to enhance CTA and assertions
> implementation, for inherited attributes:
> I have written a new method, saveInheritableAttributes(..) in
> XMLSchemaValidator.java, which I am invoking from,
> handleStartElement method.
> [1] CTA (conditional type assignment) changes
> I plan to enhance CTA implementation as following, to be able to use
> inherited attributes:
> In XMLSchemaValidator.java, I plan to modify the code fragment for CTA (the
> fragment, //process type alternatives). I'll add
> inherited attributes from the list, fInheritableAttrMap (using the element
> level information, which is the key to this map
> object) to the "attributes (of type XMLAttributes)" list.
> Rest of the code for CTA will remain same. The statement,
> if (test != null && test.evaluateTest(element, attributes)) {
> would use the new list of attributes (attributes, which are physically
> present on this element, plus the inherited attributes).
> After the CTA processing is complete (i.e after a type from CTA is assigned
> to the element), I'll remove the inherited
> attributes from the "attributes" list, so the original set of attributes is
> used by code after CTA processing.
> I think, these are all the changes that are required to enhance CTA
> implementation, to be able to use inherited attributes.
> [2] Assertion enhancements
> I plan to enhance assertions implementation as following, to be able to use
> inherited attributes:
> In the, handleStartElement method, I'll pass the inherited attributes as well
> to the assertions interface.
> To do this, I think following:
> addAssertsForEvaluation(element, attributes);
> would change to something like,
> addAssertsForEvaluation(element, attributes, inheritedattributes);
> In XMLAssertPsychopathImpl.java, I'll add the inherited attributes as well in
> the XDM tree to all descendant elements.
> I think, these changes would be sufficient, to implement inherited
> attributes, on assertions.
> I have just outlined the logic to enhance CTA and assertions, for inherited
> attributes. The final code, might look a bit
> different, than the specifics I have mentioned here.
> I would be thankful, if you could send me the feedback to this patch, and
> confirmation (and feedback) that CTA and assertions design changes, look ok.
> After I recieve the feedback to this patch, and to CTA and assertions design
> changes, I'll do the suggested modifications.
> I would appreciate, feedback from any member of the xerces-dev community, as
> well.
> Regards,
> Mukul
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