bug with reflection

I was trying to get jython to do some simple reflection, but it
sometimes failes with a type error.  Here is the code:

import sys
import java

if __name__ == '__main__':
    arg = sys.argv[1]
    c = java.lang.Class.forName(arg)
    interfaces = c.getInterfaces()
    for i in interfaces:
        print "interface: ", i.getName()

The script takes a java class as an agument and is supposed to print
all the interfaces the class implements.  It works sometimes but fails
others:

% jython bug.py java.util.HashMap
interface:  java.util.Map
interface:  java.lang.Cloneable
interface:  java.io.Serializable

% jython bug.py java.security.Identity
interface: Traceback (innermost last):
  File "bug.py", line 9, in ?
TypeError: getName(): expected 1 args; got 0

The object c is an instance of org.python.core.PyJavaClass in every
case.  Any idea why this doen not work? I'm running on solaris 2.8,
with Jython 2.1 on java1.4.0 (JIT: null).

Thanks,
Curt






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