Re: [Objectscript-users] using mountJarFile

[Lysander D. <sa...@sb...>]

Thanks for the quick response.

Since that doesn't modify the classpath for
the classloader, is there an accepted way
to set up a new classloader with a classpath
defined at runtime.  As quick hack, I've
compiled the AntClassloader2
and was able to load a class from a runtime-defined
classpath in plain java.  If that is acceptable within
objectscript,
how would it be possible to make the JavaPackage
object aware of the AntClasloader2 ?

Thanks again,
Lysander



--- Rob Clark <ro...@ti...> wrote:

> A couple things...
> 
> first, mounting it just makes it available within
> the abstract  
> filesystem.  So you could then, for example, use
> pkg.fs.File() to  
> access files within the jar (ie
> "/jar/xstream-SNAPSHOT/foo/bar.os").   
> And of course if you have script files within the
> jar, they could be  
> imported or accessed thru pkg.  But it does not add
> the jar to the  
> classpath.  (Although I think this could be
> implemented, and it is an  
> interesting idea... I'll have to look into it.)
> 
> second, you will probably need to use
> pkg.system.declareJavaPackage()  
> for any java package that is first accessed from the
> script  
> environment, otherwise the JavaPackage object has no
> way to know that  
> the package actually exists, and so it will throw a 
> 
> NoSuchMemberException.
> 
> 
> 
> On Oct 6, 2005, at 6:10 PM, Lysander David wrote:
> 
> > Hi,
> >
> > How does one use pkg.system.mountJarFile  ?
> >
> > I am attempting to instantiate an object of
> > class com.thoughtworks.xstream.XStream.
> > The class exists in this jar:
> >
> > xstream-SNAPSHOT.jar
> >
> > When I execute these commands:
> >
> > import "reflection.os";
> > var file = new pkg.fs.File (
> "xstream-SNAPSHOT.jar" );
> > pkg.system.mountJarFile     ( file );
> > var com = new JavaPackage ("com" );
> > var x = new com.thoughtworks.xstream.XStream();
> >
> >
> > I get this error:
> >
> > oscript.exceptions.PackagedScriptObjectException:
> > NoSuchMemberException: no such member:
> JavaPackage:
> > thoughtworks
> >
> >
> > What must be done to mount xstream-SNAPSHOT.jar
> > and instantiate com.thoughtworks.xstream.XStream ?
> >
> > Thanks
> >
> 
> -- Rob
> 
> ____________________
> CONTACT INFORMATION:
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> IM:   rob@sandjabber
> 
> 
> 
>