Re: [Jython-dev] Problem with method overrides in latest CVS jython?

[<bc...@wo...>]

[Rich Seddon]

>I've been playing with the latest jython from CVS, and I'm having some 
>trouble getting my code to work with it. When I attempt to call a Java method 
>that is overridden in a python class, but not overridden in all intermediate 
>python classes, I get a stack overflow. 
>
>The following test program fails using the latest CVS, but works fine if I 
>pull jython using the "Release_2_1alpha1" tag:
>
>from javax.swing import *
>
>class fooFrame(JFrame):
>    def __init__(self):
>        JFrame.__init__(self)
> 
>class barFrame(fooFrame):
>    def __init__(self):
>        fooFrame.__init__(self)
> 
>    def setSize(self, width, height):
>        fooFrame.setSize(self, width, height)
> 
> 
>if __name__ == "__main__":
>    frm = barFrame()
>    frm.setSize(100,100)
> 
>    frm.show()
>

Thanks for the test program. The bug was introduced as a side effect of
solving the old SubSubDate problem.


http://sourceforge.net/tracker/?group_id=12867&atid=112867&aid=222819&func=detail

Clearly the cure is worse than the disease so I have reverted the
change. Deeper thinking is still needed on this problem. Just
considering the situation where the call of a super method skip one
level. Using the current "super__" naming scheme will never be enough to
handle the JFrame.setSize() call in barFrame.setSize():

from javax.swing import *

class fooFrame(JFrame):
    def __init__(self):
        JFrame.__init__(self)

    def setSize(self, width, height):
        JFrame.setSize(self, width, height)

class barFrame(fooFrame):
    def __init__(self):
        fooFrame.__init__(self)

    def setSize(self, width, height):
        JFrame.setSize(self, width, height)

if __name__ == "__main__" and 1:
    frm = barFrame()
    frm.setSize(100,100)

    frm.show()

regards,
finn