Jeff Emanuel wrote:

>  I understand now.  I'm curious. In (P|J)ython classes are dynamic, and 
>  so are types.  Java
>  class signatures are static.  How would you know to generate 
>  getFoo/setFoo methods for
>  a Jython class?  How would you know what type to use for the 
>  argument/return value in
>  the generated getFoo/setFoo methods?  I can imagine some syntax that 
>  would allow a
>  compiler to generate methods, but it wouldn't be Python.   I'm not 
>  familiar with the workings
>  of jythonc to know whether you could somehow pre-process your Jython 
>  classes to
>  automatically generate the get/set methods with signature comments 
>  before jythonc compiles
>  them.

You would need to build this on top of @sig like functionality
in the interpreter.


>  
>  
>  
>  Owen Densmore wrote:
>  
> > Hi Jeff, thanks.  This is a good summary of the cleaner Jython way to 
> > get/set "properties" .. which are basically instance variables from 
> > the Java point of view.
> >
> > But my interest was sorta the reverse: how to make Jython classes use 
> > its nifty properties facility to implement the Java getter/setter 
> > protocol automatically.   (This is only necessary if your Jython 
> > instances are being used by Java frameworks which expect the get/set 
> > style.  I have this a LOT!)
> >
> > In other words, I'd like to avoid building get/set methods in my 
> > Jython class instances which are being used by a Java program as a 
> > "bean".  For this to work, there would have to be something that 
> > automatically built get/set methods for classes (as Groovy does), or 
> > there would have to be a run-time mechanism that sees a getFoo/setFoo 
> > call and converts it to a simpler property usage.
> >
> > The whole point is this: Java is way, way too verbose.  Groovy and a 
> > few other scripting systems are trying to reduce this to make Java and 
> > its platform independence more approachable by more people.  Jython 
> > does this, with the benefit of the rich Python tradition and well 
> > crafted language.  Getter/setters are part of the verbosity, Groovy 
> > manages this, thus the natural question: how would Jython deal with 
> > removing this "noise".
> >
> > Possibly the error handlers could do this?  Or we could invent a new 
> > function called "create_get_set_methods"?
> >
> > Owen
> >
> > On Dec 4, 2004, at 9:55 AM, Jeff Emanuel wrote:
> >
> >>
> >> http://www.jython.org/docs/properties.html
> >> See jython source org/python/core/PyJavaClass.java
> >>
> >>
> >> Owen Densmore wrote:
> >>
> >>> I'm using Jython within a Java framework which uses bean 
> >>> getter/setters.  Thus when I build a class in Jython to be used by 
> >>> this framework, I need to build getter/setter methods in the Jython 
> >>> class.
> >>>
> >>> My question is: is there a way to have Jython auto-generate these?  
> >>> Groovy, for example, intercepts getter/setters from Java and 
> >>> automatically converts them to property/attribute requests.  I 
> >>> presume because Jython has foo.var abbreviations, it might somehow 
> >>> do a similar thing, removing the need for the annoying getter/setter 
> >>> hand-made code.
> >>>
> >>> Owen
> >>
> >>
> >
>  
>  
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