We always use the JAI that is installed in the ext directory. Where
is this code being called from? Every plugin that uses JAI must add
the line:
Eclipse-BuddyPolicy: ext
In your manifest.mf file.
This states that the extensions in the JVM's lib/ext directory will
be available on the classpath of that plugin. It could be that the
method you are using is getting the File from the wrong classloader
(the lib one perhaps).
If you can give me some details about what you're doing I might be
able to come up with a better answer.
Jesse
On Apr 4, 2007, at 6:28 AM, Andrea Antonello wrote:
Hi folks, I have (once again) a problem with jai:
java.lang.ClassCastException:
com.sun.media.jai.imageioimpl.ImageReadWriteSpi
at
javax.media.jai.OperationRegistry.registerServices
(OperationRegistry.java:2047)
at
javax.media.jai.ThreadSafeOperationRegistry.registerServices
(ThreadSafeOperationRegistry.java:612)
at
javax.media.jai.OperationRegistry.initializeRegistry
(OperationRegistry.java:365)
at javax.media.jai.JAI.<clinit>(JAI.java:560)
So what is the best practice?
The best practice is the harder to attain. You should have the JAI
jars
installed directly into your JDK, and don't have them anywhere in the
classpath. Otherwise you're bound to issues as soon as a damned
classloader does not play exactly by the Sun rules. Sigh...
Yes, but that gives me big troubles when I have to export a product. I
usually somehow have some reference in it and when not it fails
because
there is some dependency. I agree with the fact that this is a problem
of mine and that I should know a bit better how exactly to do a clean
and proper export of an eclipse product, but things would be much
easier
if the lars could be put in the classpath and the .so in the
library path :)
The issue is that JAI is packaged as an extension, and it's sealed.
We still haven't tried hacking the official jars and remove the
sealing
markers, but that would be an interesting test too (that is, to
check if
this way JAI can be handled both in the JDK/JRE and in the
classpath).
Oh, that is something I didn't know, the sealing thing I mean. I
remember there was also a download version for classpath use. Hmmm...
I'll have to check.
Thanks for the informations,
Ciao
Andrea
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel
_______________________________________________
User-friendly Desktop Internet GIS (uDig)
http://udig.refractions.net
http://lists.refractions.net/mailman/listinfo/udig-devel
