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ReaderGroups.py
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ReaderGroups.py
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"""ReaderGroups manages smart card reader in groups.
__author__ = "gemalto http:https://www.gemalto.com"
Copyright 2001-2012 gemalto
Author: Jean-Daniel Aussel, mailto:[email protected]
This file is part of pyscard.
pyscard is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
pyscard is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with pyscard; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
"""
from smartcard.Exceptions import SmartcardException
from smartcard.ulist import ulist
class BadReaderGroupException(SmartcardException):
"""Raised when trying to add an invalid reader group."""
def __init__(self):
SmartcardException.__init__(self, 'Invalid reader group')
class DeleteSCardDefaultReaderGroupException(SmartcardException):
"""Raised when trying to delete SCard$DefaultReaders reader group."""
def __init__(self):
SmartcardException.__init__(
self, 'SCard$DefaultReaders cannot be deleted')
class innerreadergroups(ulist):
"""Smartcard readers groups private class.
The readergroups singleton manages the creation of the unique
instance of this class.
"""
def __init__(self, initlist=None):
"""Retrieve and store list of reader groups"""
if None == initlist:
initlist = self.getreadergroups()
if None != initlist:
ulist.__init__(self, initlist)
self.unremovablegroups = []
def __onadditem__(self, item):
"""Called when a reader group is added."""
self.addreadergroup(item)
def __onremoveitem__(self, item):
"""Called when a reader group is added."""
self.removereadergroup(item)
def __iter__(self):
return ulist.__iter__(self)
#
# abstract methods implemented in subclasses
#
def getreadergroups(self):
"""Returns the list of smartcard reader groups."""
return []
def addreadergroup(self, newgroup):
"""Add a reader group"""
if not isinstance(newgroup, type("")):
raise BadReaderGroupException
self += newgroup
def removereadergroup(self, group):
"""Remove a reader group"""
if not isinstance(group, type("")):
raise BadReaderGroupException
self.remove(group)
def addreadertogroup(self, readername, groupname):
"""Add a reader to a reader group"""
pass
def removereaderfromgroup(self, readername, groupname):
"""Remove a reader from a reader group"""
pass
class readergroups(object):
"""ReadersGroups organizes smart card reader as groups."""
"""The single instance of __readergroups"""
instance = None
innerclazz = innerreadergroups
def __init__(self, initlist=None):
"""Create a single instance of innerreadergroups on first call"""
if None == readergroups.instance:
readergroups.instance = self.innerclazz(initlist)
"""All operators redirected to inner class."""
def __getattr__(self, name):
return getattr(self.instance, name)
if __name__ == '__main__':
print readergroups()