[IronPython] ipy support in msxsl:script blocks

Wed Sep 6 22:35:24 CEST 2006

Excellent!  Thanks for the advice, Dino!  I will add this to my priority
list and update accordingly.

In a (somewhat) related note, I have been pulling together a quick demo that
incorporates IronPython, LINQ, and XSLT 2.0 extensions functions to provide
what I believe will prove to be an extremely lethal combination as this demo
develops.  The first part is complete, though a bit rough around the edges.

This builds directly from <
http://www.oreillynet.com/xml/blog/2006/08/solving_some_of_scobles_proble.html>
from
a few weeks back.  The post was an XSLT 2.0 answer to Steve Eichert's
"Solving Scoble's problems ..." <
http://steve.emxsoftware.com/LINQ/Solving+all+Scobles+problems+with+Linq+to+XML>
post
from a few weeks back.  However, this time around I have extended Steve's
original code base <
http://dev.pypod.net/browser/trunk/LINQModules/FeedFilter.cs> to implement a
slight more dynamic approach to the filter settings such that you can add,
subtract, multiply, and/or divide the filter settings using an external XML
file.

I have quite a bit more to add to this, including the mentioned extension
functions for XSLT 2.0.  More updates throughout today and tomorrow, the
result of which will become a new post when complete. However, I'll avoid
flooding the list with each update, and instead point you to the timeline
RSS <
http://dev.pypod.net/timeline?ticket=on&changeset=on&milestone=on&wiki=on&wiki=on&max=50&daysback=90&format=rss>
feed if you have interest in keeping up with the changes.

With this in mind, if any of you have some ideas you would like to throw my
direction, or furthermore would like to view/play with the code base, you
can do so via the PyPod.Net Click-Once app, or checkout the code base from
SVN directly.

The svn repo is located @ http://src.pypod.net/trunk

You can view the code base via the Trac interface @
http://dev.pypod.net/browser/trunk

And, as already mentioned in a separate thread, the PyPod.Net app is located
@,

http://pypod.net/console/index.html

To run the (BIG TIME HACK) test,

>>> import linqtest

(note: Dependent upon your system, you may get a "SystemError: Unable to
connect to the remote server" error at first of which you will then more
than likely be asked for permission for the IP Console to access the
internet)

As pointed out, the above is a quick and dirty hack just to test and make
sure it works properly.  I am in the middle of building a more efficient
caching mechanism such that the XML data for processing can be accessed
once, cached locally, and then used for each subsequent test run unless a
flag is set to access the live stream again.  WIth this in mind, please be
aware that the XML data file that is currently set to be accessed
dynamically with each new run is ~17megs, so it will take a bit before you
see the result of the filtering printed to the console.

I'll update with extended details when it seems appropriate to do so.

Until then, please let me know of any ideas any of you would like to see
developed as part of this code base.  Sample code is all fine and dandy, but
I would rather write something that would be immediatelly useful and
reusable to a broader base of folks than would be your typical sample app if
at all possible.

Best regards,

On 9/6/06, Dino Viehland <dinov at exchange.microsoft.com> wrote:
>
>   The best thing you could do for Saxon.NET right now is to support
> ICustomTypeDescriptor in addition to supporting Reflection.  The one
> downside is that ICustomTypeDescriptor isn't as comprehensive as
> Reflection.Emit – for example it doesn't support calling methods.  But it
> does support getting properties.  So you'll want to back that up w/
> Reflection, and hopefully in time there'll be a solution which will
> encompass all of these.
>
>
>
> *From:* users-bounces at lists.ironpython.com [mailto:
> users-bounces at lists.ironpython.com] *On Behalf Of *M. David Peterson
> *Sent:* Tuesday, September 05, 2006 2:27 PM
> *To:* Discussion of IronPython
> *Subject:* Re: [IronPython] ipy support in msxsl:script blocks
>
>
>
> btw, the newly released docs in regards to develping extension functions
> for Saxon on .NET are located @ http://www.saxonica.com/documentation/extensibility/dotnetextensions.html
>
>
> On 9/5/06, *M. David Peterson* <xmlhacker at gmail.com> wrote:
>
> Worth noting, from my post earlier today (http://www.oreillynet.com/xml/blog/2006/09/mhksaxon_saxon_88basic_and_sch_1.html
> ) regarding the release of Saxon on .NET 8.8,
>
> * in the .NET product, extension functions written in C# or other .NET
>
>  languages can now be invoked
>
>
> While the same is more than likely true in regards to the ability to
> access extension functions written in Python, this is one area I can help
> with more so than anything else as this was a significant area of study and
> development I put into Saxon.NET before handing over the reigns to Dr. Kay
> in February.   In addition, with his guidance, I've since continued forward
> in working on various areas of research and development.  With this in mind,
> in regards to,
>
>
>
> We'll need to work w/ some other teams within the company to make sure we
> can get the right amount of support in the right places to make this all
> come together.  Thanks for bringing this to our attention.
>
>
>
> While for obvious reasons I can't help with the internal System.Xml.Xslcode base, I can help with the
> Saxon.NET code base.  If I can be of help, please let me know :)
>
>
>
>  On 9/5/06, *Dino Viehland* < dinov at exchange.microsoft.com> wrote:
>
> The answer to this appears to be no - The XSL processor uses Reflection to
> try and discover the method to be called.  In IronPython reflection won't
> tell you what methods are available.  We do support the
> ICustomTypeDescriptor interface which is another way to get this information
> (which enables scripting WPF), but unfortunately XSL isn't falling back to
> that.
>
> We'll need to work w/ some other teams within the company to make sure we
> can get the right amount of support in the right places to make this all
> come together.  Thanks for bringing this to our attention.  I'm not going to
> open a bug on this (because it's not necessarily an IP issue) but I believe
> we will be tracking this one (and similar issues) closely.
>
>
> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com]
> On Behalf Of Jesse Wiles
> Sent: Tuesday, September 05, 2006 8:00 AM
> To: Discussion of IronPython
> Subject: [IronPython] ipy support in msxsl:script blocks
>
> Hi,
>
> Can I script XSL extension objects using Iron Python?
>
> Jesse Wiles
> _______________________________________________
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> users at lists.ironpython.com
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>
>
>
>  --
> /M:D
>
> M. David Peterson
> http://mdavid.name | http://www.oreillynet.com/pub/au/2354
>
>
>
>
> --
> /M:D
>
> M. David Peterson
> http://mdavid.name | http://www.oreillynet.com/pub/au/2354
>
> _______________________________________________
> users mailing list
> users at lists.ironpython.com
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>
>
>

-- 
/M:D

M. David Peterson
http://mdavid.name | http://www.oreillynet.com/pub/au/2354
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