RE: [xsl] Curious about creating a custom function to java classes pertaining to images

Subject: RE: [xsl] Curious about creating a custom function to java classes pertaining to images
From: "Mario Madunic" <Mario_Madunic@xxxxxxxxxxxx>
Date: Fri, 7 Aug 2009 06:35:06 -0500
Thanks Michael and Wendell for your input.

I'm still a beginner when it comes to Java and was looking at this as part of
a learning process. I like Wendell's method and have been interested in Cocoon
for some time and your method is giving me incentive to look at it and give it
a try also.

Thanks again

Marijan (Mario) Madunic
Publishing Specialist
New Flyer Industries
(204) 934 8815

-----Original Message-----
From: Wendell Piez [mailto:wapiez@xxxxxxxxxxxxxxxx]
Sent: Thursday, August 06, 2009 3:37 PM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: [xsl] Curious about creating a custom function to java classes
pertaining to images


At 09:31 AM 8/6/2009, you wrote:
>Sorry about the foggy subject line and if this
>isnC"b,b"t appropriate for this mailing list.
>Was sitting here thinking about our various
>image needs and was thinking about the
>possibility of creating a custom function that
>calls a Java class. Here is what IC"b,b"m thinking about:
>Parse XML doc (DITA) using XSLT 2 and Saxon.
>Come across a ref to an image (which we
>havenC"b,b"t decided if we create a specialized
>concept to contain all relevant image info or some other method).
>The original images will be SVG more than likely, at the moment they are
>Parse the SVG to create the appropriate file
>type (jpg, gif, wmf, etc, or just plain old SVG)
>for output type, resize (based on conditions),
>place the modified image in the appropriate
>dir/db table. All this using XSLT via either a
>call to Java class or a custom XSLT function calling a Java class.
>IC"b,b"d like this to be part of the XSLT publishing workflow.
>Has anyone done this or see any issues of doing
>this? Just wanted a heads up before going further with this.

This doesn't sound unreasonable.

What I do is quite similar. I use Apache Cocoon,
which allows me to look up and load SVG files,
rasterize them into jpeg or PNG (using Apache
Batik, which comes with Cocoon), and rescale
them, when necessary, while doing so (using XSLT).

The reference to the file is either a direct call
to the server where Cocoon is running, or by
means of a key which is expanded by XSLT into such a link.

Essentially, this does everything you describe,
except I use Cocoon instead of writing the Java
myself, plus it's RESTful, using calls on a
(local) web server instead of extension
functions. You could certainly emulate this
functionality in Java, using components you
either acquired (from Cocoon or elsewhere) or wrote yourself.


Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.      
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
   Mulberry Technologies: A Consultancy Specializing in SGML and XML

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