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# Authors:
# Jason Gerard DeRose <jderose@redhat.com>
#
# Copyright (C) 2008 Red Hat
# see file 'COPYING' for use and warranty information
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2 only
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
Base classes in for plug-in architecture and generative API.
"""
from exceptions import NameSpaceError
class Command(object):
def normalize(self, kw):
raise NotImplementedError
def validate(self, kw):
raise NotImplementedError
def execute(self, kw):
raise NotImplementedError
def __call__(self, **kw):
kw = self.normalize(kw)
invalid = self.validate(kw)
if invalid:
return invalid
return self.execute(kw)
class Argument(object):
pass
class NameSpace(object):
def __init__(self, kw):
assert isinstance(kw, dict)
self.__kw = dict(kw)
for (key, value) in self.__kw.items():
assert not key.startswith('_')
setattr(self, key, value)
self.__keys = sorted(self.__kw)
def __getitem__(self, key):
return self.__kw[key]
def __iter__(self):
for key in self.__keys:
yield key
class API(object):
def __init__(self):
self.__c = object()
self.__o = object()
def __get_c(self):
return self.__c
c = property(__get_c)
def __get_o(self):
return self.__o
o = property(__get_o)
def register_command(self, name, callback, override=False):
pass
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