Re: [Jython-users] Newbie question

[James H. <jh...@pa...>]

Thank you for the clear explanation... I'll look forward to the new version!

James

At 6/18/2001 06:22 PM +0000, Finn Bock wrote:
>On Fri, 15 Jun 2001 16:28:33 -0600, you wrote:
>
> >Hi,
> >
> >So far I think Jython is pretty cool... but I've got a problem/question...
> >
> >First off, here's my sample code:
> >
> >...
> >
> >My problem is that I really need the method
> >
> >   void setAttribute(String key, Object attr)
> >
> >to be this:
> >
> >   void setAttribute(String key, Serializable attr)
>
>Jython-2.0 did not handle Serializable argument very well. This have
>been fixed in jython-2.1a1 where your example works.
>
> >Can someone explain this to me?
>
>When the python code
>
>   theMap.setAttribute("crapKey", "crapVal")
>
>is executed jython is faced with a choice. Should it insert the the
>PyString instance that wraps "crapVal" or should it unwrap the string
>and insert the java.lang.String instance. If the method signature uses
>Object, jython always unwraps, which is why that works in you example.
>If the method signature used Serializable, Jython-2.0 would check and
>see that PyString implement Serializable (it does) and pass over the
>PyString wrapper. In Jython-2.1a1, a Serializable signature will cause
>unwrapping of string, ints, longs, floats, classes and instances.
>
>regards,
>finn