Re: [Jython-dev] status of a reported bug

[<j.j...@mc...>]

After reading your previous post, I implemented a Java interface via Jython 
and then used it within a Java application without the use of jythonc...I've 
never used this methodology before.  I think this method is cleaner than using 
jythonc because it enforces coding to interfaces and it cuts out the step of 
compiling your jython classes into java code.

However, I think it may be important to carry jythonc forward into future 
releases because there may already be widespread usage of the utility.  It 
would be a pain for products which currently utilize jythonc if they had to 
change their code in order to move forward with future releases of Jython.

This is a great topic for an article in the next distribution of the Jython 
Monthly newsletter.  I am not sure how many people currently code against Java 
interfaces in order to utilize Jython code in Java apps, but it is useful to 
know.  Maybe I'll write a tutorial for this methodology for the next 
distribution.

- Josh


> Speaking of jythonc on the branches, in my dev list spelunking for
> PyXML info last night I noticed a couple comments that made it sound
> like jythonc might be unable to support generators.  A lack of
> generator support is definitely causing every jythonc test to fail on
> the 2.3 branch since they've made their way into the std Python
> library there.  What's the plan for jythonc in the future?
> 
> One of the things I saw mentioned was that rather than having a full
> blown .py -> .java translator like jythonc, we could just have a
> static proxy bytecode creator.  Since having the proxy bytecode in the
> classpath would allow the interpreter to function in a restricted
> classloader enviroment, this would allow jython to run everywhere.  It
> would just remove the ability to have Jython code declare a Java
> calling mechanism with all of the '@sig' business.  I personally
> prefer to declare an interface or class in java and have my jython
> code extend that if I want to call it from java.  It removes the
> complication of having to run jythonc and doesn't force a user to
> learn the new '@sig' declaration.  Do people really like the '@sig'
> feature of jythonc?  Does it allow anything beyond what's possible
> with declaring interfaces in Java?  Not that it matters if jythonc
> can't do generators....
> 
> Just wondering,
> Charlie
> 
> On 8/17/06, Raghuram Devarakonda <ra...@sy...> wrote:
> >
> > Thanks for the info. My initial emphasis will be on 2.1 as that is what
> > we deploy. Once that is done, I can work on other branches.
> >
> > Raghu.
> >
> > Charlie Groves wrote:
> > > The linenumbers  are generated from the f_lineno field in the PyFrame
> > > for each call in a traceback.  I think you could add the line number
> > > from the python file that generated a particular method in the java
> > > code created by jythonc.  Then as the frames are created in calls into
> > > the java, set f_lineno in addition to the stuff that is already filled
> > > in.  This is just conjecture based on some knowledge of the exception
> > > building and a rudimentary understanding of how jythonc works, so take
> > > it with a grain of salt.
> > >
> > > It'd be great to have someone working on jythonc.  It's going to need
> > > to be taught about generators if it's going to work with 2.3, and I
> > > don't think anyone is working on it now.
> > >
> > > Thanks,
> > > Charlie
> > >
> > > On 8/16/06, Raghuram Devarakonda <ra...@sy...> wrote:
> > >>
> > >> Hi,
> > >>
> > >> I submitted this bug quite a while back but it is not assigned to
> > >> anyone. I haven't tried to reproduce the problem with jython 22 but
> > >> there is a comment in the bug report which says the problem remains. I
> > >> would like to take a look but it will be nice if someone can tell me
> > >> whether getting line numbers in this case is feasible. I would also
> > >> appreciate any general remarks about how best to go about the fix.
> > >>
> > >> 
> http://sourceforge.net/tracker/index.php?func=detail&aid=904322&group_id=12867&a
> tid=112867
> > >>
> > >>
> > >> Thanks,
> > >> Raghu.
> > >>
> > >>
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> >
> 
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