[Jython-bugs] [ jython-Bugs-406193 ] stack overflow when delegating

[<no...@so...>]

Bugs item #406193, was opened at 2001-03-05 20:16
You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=112867&aid=406193&group_id=12867

Category: Core
>Group: Fixed in 2.1a2
Status: Closed
Resolution: Fixed
Priority: 5
Submitted By: brian zimmer (bzimmer)
Assigned to: Finn Bock (bckfnn)
Summary: stack overflow when delegating

Initial Comment:
There appears to be a problem with PyReflectedFunction
when a Python class is an implementation of a Java
interface and delegates to a Java implementation of
that interface.

The primary problem is overloaded methods on the
interface, such as the ISimple.get() methods.

Look at classes t and u.  Both do as expected.  t is
not the interface, so it's marginally useful.  u
implements the interface but needs to handle the get()
methods in order for it to work properly.  v is what I
want, but it ends up blowing the stack.  Should this
work?  I think yes, but can't figure out how to patch it.


Run the code to get the full affect:

import Simple, ISimple

class t:
	def __init__(self, s):
		self.s = s

	def __getattr__(self, name):
		return getattr(self.s, name)

class u(ISimple):
	def __init__(self, s):
		self.s = s

	def get(self, i=None):
		if i:
			return self.s.get(i)
		else:
			return self.s.get()

class v(ISimple):
	def __init__(self, s):
		self.s = s

	def __getattr__(self, name):
		return getattr(self.s, name)

def main():
	print "using Simple"

	y = Simple()
	print y
	print y.get()
	print y.get(2)
	print y.get()
	print y.get(0)

	print "using t"

	y = t(Simple())
	print y
	print y.get()
	print y.get(2)
	print y.get()
	print y.get(0)

	print "using u"

	y = u(Simple())
	print y
	print y.get()
	print y.get(2)
	print y.get()
	print y.get(0)

	print "using v"

	y = v(Simple())
	print y
	print y.get()
	print y.get(2)
	print y.get()
	print y.get(0)

if __name__ == '__main__':
	main()


----------------------------------------------------------------------

Comment By: Finn Bock (bckfnn)
Date: 2001-03-22 12:52

Message:
Logged In: YES 
user_id=4201

Fixed in:

PyClass.java: 2.23;
ProxyMaker.java: 2.12;
JavaMaker.java: 2.10;
ObjectFactory.py: 2.7;
compile.py: 2.17;
proxies.py: 2.10;

----------------------------------------------------------------------

Comment By: Nobody/Anonymous (nobody)
Date: 2001-03-06 10:38

Message:
Logged In: NO 

Please look at the attached jar for all the source.

----------------------------------------------------------------------

You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=112867&aid=406193&group_id=12867