Java to Python translation

[Bertrand Geston]

"Bertrand Geston" <bergeston at yahoo.fr> wrote in message
news:a8hop5$rq6ba$1 at ID-135695.news.dfncis.de...
>
> "Andrew McNamara" <andrewm at object-craft.com.au> wrote in message
> news:mailman.1017831968.9815.python-list at python.org...
> > >> > I need to translate a (rather voluminous 100MB) java program to
> > >> > python. After a few searches on google, apparently the best tools
> > >> > for this task are Lex-Yacc (Flex-Bison on linux). While I am
working
> > >> > on the Lex-YACC HOWTO, I would be very interested in hearing of
> > >> > others' successful experiences/feedback at this. Any pointers of
> > >> > interest would similarily be appreciated.
> > [...]
> > >I think for a project like that, even a success would be disastrous.
> > [...]
> >
> > Indeed.
> >
> > But I bet a complete re-write in python would less than 10MB, and take
> > less than a tenth of the time of the original project... 8-)
> >
> > The suggestion of using Jython would be good one - subsystems can be
> > rewritten and tested as time and resources allow.
> >
>
> To translate Java to Python (no idea if it is worthy in this case, but in
a
> more general perpective, this is a problem that makes sense IMHO) , I
wonder
> about this intermediate solution:
> 1. use a parser/generator to translate the Java code to Jython code (with
> eventually some generated 'util' Java classes for the calls to the JDK
> packages and other libraries)
By this I mean Jython classes that are Java specific. The purpose is to
isolate the Jython code that is not Python compliant. The rest of the code
should be Python portable code.

> 2. translate manually the Jython code to Python code if is is really
worthy.
>
> My guess is that step 2 could be a lot simpler to achieve than the whole
> translation and that step 1 can be done automatically (even if the
> development of the generator requires some investment that could be shared
> in an open source project) because :
> - Java and Python are not so far in their concepts,
> - Python is more dynamic than Java and I suppose that this makes it
simpler
> than the opposite (Jython)
> - part of the effort could help anyway (classes to manage the java method
> overridde in Python, ...)
>
> I have no experience in such area, any comments are welcome.
>
>
>
> > --
> > Andrew McNamara, Senior Developer, Object Craft
> > http://www.object-craft.com.au/
> >
>
>