Hi Michael,

Please disconsider my first email in this thread.
I was thinking about implement StAX. However, this project is nothing to do with this.

I have read the tutorial [1] and the ideas got more clear for me:
In fact, what is proposed is to accomplish the XLS Transformation by receiving a StAXSource and sending the result trough a StAXResult.

The approach you have proposed in your last message is now clear for me: I have to iterate over the StAXSource by using an XMLEventReader / XMLStreamReader and translate these events to SAX ones.

I just have to check how to apply this approach into the code.


I know the implementation is based on the interfaces defined by JAXP. However, for run the samples as well as the tests I will write, we are gonna need an implementation. By default, Xalan uses Xerces. The question is: does Xerces support StAX?


[1] http://tutorials.jenkov.com/java-xml/index.html

2013/6/25 Samuel Medeiros <ccc.samuel@gmail.com>
Hi Michael,

Thanks for this information.
I am gonna study exactly how to apply this approach into the source code.

If I have questions, I will let you know.


2013/6/24 Michael Glavassevich <mrglavas@ca.ibm.com>
Hi Samuel,

One approach you could take for StAXSource would be to write a StAX to SAX
converter. This would take an XMLStreamReader / XMLEventReader as input
and generate SAX events on to a ContentHandler. You could wire that to the
TemplatesHandler (org.apache.xalan.processor.StylesheetHandler) allowing
you to reuse the existing components for building the Templates object.

Thanks for the update.

Michael Glavassevich
XML Technologies and WAS Development
IBM Toronto Lab
E-mail: mrglavas@ca.ibm.com
E-mail: mrglavas@apache.org

Samuel Medeiros <ccc.samuel@gmail.com> wrote on 06/23/2013 04:30:38 PM:

> Hi Michael,
> I have read the documentation available at the Xalan's website and
> also its pointers to XSL/XSLT, XPath and JAXP. I have also run some
> samples and did some tracing by adding some prints into the code.
> It's quite clear for me how the things work, but I am not
> familiarized enough with the code.
> According to [1], the javax.xml.transform.stax was added to support
> StAX. This package consists of the interfaces: TemplatesHandler
> and TransformerHandler; and classes: StAXResult and StAXSource.
> Also, the packages javax.xml.stream, javax.xml.stream.events and
> javax.xml.stream.util were added to support StAX. In addition, the
> class Validator have also to accept StAXSource.
> For me, to add StAX support, it would be just implement the
> interfaces provided by these packages and plug them into the
> existent code. For example, in the
> org.apache.xalan.processor.TransformerFactoryImpl's method
> newTemplates(Source source), I would add a condition to test if the
> source is a StAX one and then create the correct TemplatesHandler
> instance, that will create the Templates object.
> I don't know exactly how prepared is Xalan to receive these changes.
> I need help to understand the project's structure. Then I will be
> able to do the work of the 2 next weeks (as provided in the plan):
> define precisely the changes I will do.
> Sincerely,
> Samuel
> [1] http://docs.oracle.com/javase/6/docs/technotes/guides/xml/jaxp/
> ReleaseNotes_160.html

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