[antlr-interest] Re: StringTemplate issue

[birmanstefan]

    Let's say you jar "org/antlr/codegen", including also the 
directory "org/antlr/codegen/templates" with all the templates 
(preserving the dir structure as it is on your harddisk). Then it 
issues messages like: "Can't load ... as resource" and "Can't load 
template...". It seems that it doesn't find the templates using 
classLoader stuff. You may try it on your application.
   I post "test4tp.jar", including an ant build script, in order to 
reproduce the case.

Cheers, 
      Stefan.

--- In antlr-interest at yahoogroups.com, Terence Parr <parrt at c...> 
wrote:
> 
> On Jun 21, 2004, at 3:03 AM, birmanstefan wrote:
> 
> > Hello Ter,
> >
> >     I used a jarred app, which includes a library of templates, 
and
> > run in a "Can't load template" error. It seems that it tries to 
load
> > template from an illegal path. I put a testcase in group's files
> > directory called test4tp.jar (includes all you need to reproduce 
the
> > issue).
> >
> >     The fix was to create a group without a root directory and 
include
> > all the templates in the root of the jar. The bad thing is that it
> > doesn't preserve the hierarchy in jar file and have to modify in
> > original code (=> two versions : for jarred and un-jarred app).
> >
> >     I took a look in the  StringTemplateGroup.loadTemplate() and
I 
saw
> > that it uses some classLoader stuff to load the template. 
Enlarging
> > this mechanism in order to be able to load templates from dir
> > structure in a jar file (JAR URL) should fix the issue. I'm not 
very
> > familiar with this mechanism, so I must ask : am I looking in the
> > wrong direction?
> 
> Hmm...for the code generator I'm working on now, I use "fully 
> qualified" template names like "org/antlr/codegen/templates/foo" 
which 
> it loads from the classpath.  I do this rather than paths under a 
> rootDir as I don't know where the app will be unjar'd or used.  Are 
you 
> saying that Java's jar mechanism doesn't duplicate this when the
dir 
is 
> jar'd up?  Ack!  If so, I'll have to dig into and figure out what 
do.
> 
> >     On the other hand, are there any news on StringTemplates 2.0?
> 
> It's totally great!  Still haven't done the manual, but I'm testing 
out 
> the features now for the ANTLR 3.0 code generator.  StringTemplate 
for 
> code gen is amazingly fabulous! (er...if I do say so myself).  I 
expect 
> to get that out in July.  Want a pre-release copy?  Send me email 
> directly. :)
> 
> Ter
> --
> CS Professor & Grad Director, University of San Francisco
> Creator, ANTLR Parser Generator, http://www.antlr.org
> Cofounder, http://www.jguru.com
> Cofounder, http://www.knowspam.net enjoy email again!
> Cofounder, http://www.peerscope.com pure link sharing



 
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