Can I extend Java class to my own python implementing class

[neroliang]

PyLucene Homepage:
pylucene.osafoundation.org

1.Quotas from PyLucene:

"""
Technically, the PyLucene programmer is not providing an 'extension'
but a Python implementation of a set of methods encapsulated by a
Python class whose instances are wrapped by the Java proxies provided
by PyLucene.
----http://svn.nuxeo.org/pub/vendor/PyLucene/tags/1.9rc1-1/README

"""
To me, it almost means that I can't simply extend Java class, in my own Python implementation, such as FunnyTokenizer(PyLucene.CharTokenizer).

2.Testcase

Thanks to the link offered as http://svn.osafoundation.org/pylucen...ordAnalyzer.py
I try a testcase as follows:

#-------------------tester.py------------------
from PyLucene import StringReader
from PyLucene import CharTokenizer
 
class SimpleKeywordAnalyzer(object):
    def tokenStream(self, fieldName, reader):
        class charTokenizer(object):
            def isTokenChar(self, c):
                return True
 
        return CharTokenizer(charTokenizer(), reader)
 
if __name__ == '__main__':
    ca = SimpleKeywordAnalyzer()
    strs = ca.tokenStream(' ', StringReader('bonne nuit Francais'))
    print 'Merci'
    for each in strs:
        print each.termText(), each.type()
#-------------------------------------------------------------

Simple as it is, however, it roughly didn't work out.

Message:
TrackBack:
File 'tester.py', line 21, in <module>
    strs = ca.tokenStream(' ', StringReader('bonne nuit Francais'))
File 'tester.py', line 16, in <module>
    return CharTokenizer(charTokenizer(), reader)
NotImplementedError:('instantiating java class', <type 'PyLuceneCharTokenizer'>
 

-----------------------------------------------
BTW:Environment:
Python 2.5.1,
PyLucene 2.0.0-3,
i686-pc-linux-gnu
Thread model: posix
gcj-3.4.6