[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: Random UUID in pure XSLT?

Subject: Re: Random UUID in pure XSLT?
From: "Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 10 Nov 2020 18:28:20 -0000
Re:  Random UUID in pure XSLT?
I was wondering about this requirement a few days ago, as it happens.

One approach might be to add an extra "method" to the object returned by
fn:random-number-generator.

If you don't like extension functions then an alternative now we have
first-class functions is to construct an XDM function object in the calling
application and pass it in to the stylesheet as a global stylesheet parameter.
The function in this case might be a function that takes a random xs:double
and delivers a random UUID. You could then call this function supplying random
numbers generated using fn:random-number-generator.

To construct your own XDM function object in the calling application,
implement net.sf.saxon.expr.Callable and wrap your implementation in a s9api
XdmFunctionItem.


Michael Kay
Saxonica

> On 10 Nov 2020, at 16:36, Piez, Wendell A. (Fed) wendell.piez@xxxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> XSL Friends b
>
> Today I write from the day job, where I am researching the question of how
can I go about producing random UUIDs, in dozens or hundreds, inside an XSLT
pipeline, without extension functions in Saxon. The Java randomUUID() function
works nicely when itbs available, but I need to distribute the capability
for SaxonHE and eventually SaxonJS.
>
> We do not have an available implementation of RFC 4122 v4 brandom UUIDb
in pure XSLT do we, free to use (and study)? I know the functional nature of
the language makes randomness, um, problematic (when isnbt it?), which
sometimes means workarounds b thatbs all fine. Indeed so would calling out
to a web service if it is known to be reliable. I have thought about handing a
list of UUIDs in at runtime, but as I said, there may sometimes be hundreds
and perhaps thousands, which makes that approach seem a bit scary.
>
> Any thoughts or perspective would be most welcome.
>
> Thanks, Wendell
>
>
>
> XSL-List info and archive
> EasyUnsubscribe (by email)

Current Thread

PURCHASE STYLUS STUDIO ONLINE TODAY!

Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
Email
First Name
Last Name
Company
Subscribe in XML format
RSS 2.0
Atom 0.3
Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.