[Jython-dev] Fwd: [Jython-users] Auto getter/setter generation?

[Owen D. <ow...@ba...>]

It occurs to me that I should have had this discussion here in 
jython-dev.  Basically I'm interested in automatically generated 
getter/setter methods.  Looking at Jython's sophisticated property 
handling, I hoped it would somehow handle get/set calls from Java 
classes.

Begin forwarded message:

> From: Owen Densmore <ow...@ba...>
> Date: December 4, 2004 10:53:13 AM MST
> To: jyt...@li..., Jeff Emanuel 
> <jem...@fr...>
> Subject: Re: [Jython-users] Auto getter/setter generation?
>
> 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