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188 lines
4.0 KiB
Python
188 lines
4.0 KiB
Python
# Authors:
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# Jason Gerard DeRose <jderose@redhat.com>
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#
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# Copyright (C) 2008 Red Hat
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# see file 'COPYING' for use and warranty information
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; version 2 only
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""
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Base classes for the public plugable.API instance, which the XML-RPC, CLI,
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and UI all use.
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"""
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import re
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import plugable
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import errors
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class opt(plugable.ReadOnly):
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__public__ = frozenset((
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'normalize',
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'validate',
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'default',
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'required',
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'type',
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))
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def normalize(self, value):
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try:
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return self.type(value)
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except (TypeError, ValueError):
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raise errors.NormalizationError(
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self.__class__.__name__, value, self.type
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)
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class cmd(plugable.Plugin):
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__public__ = frozenset((
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'normalize',
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'autofill',
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'__call__',
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'get_doc',
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'opt',
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))
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__opt = None
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def get_doc(self, _):
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"""
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Returns the gettext translated doc-string for this command.
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For example:
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>>> def get_doc(self, _):
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>>> return _('add new user')
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"""
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raise NotImplementedError('%s.get_doc()' % self.name)
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def get_options(self):
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"""
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Returns iterable with opt_proxy objects used to create the opt
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NameSpace when __get_opt() is called.
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"""
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raise NotImplementedError('%s.get_options()' % self.name)
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def __get_opt(self):
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"""
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Returns the NameSpace containing opt_proxy objects.
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"""
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if self.__opt is None:
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self.__opt = plugable.NameSpace(self.get_options())
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return self.__opt
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opt = property(__get_opt)
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def __call__(self, *args, **kw):
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(args, kw) = self.normalize(*args, **kw)
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(args, kw) = self.autofill(*args, **kw)
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self.validate(*args, **kw)
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class obj(plugable.Plugin):
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__public__ = frozenset((
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'mthd',
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'prop',
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))
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__mthd = None
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__prop = None
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def __get_mthd(self):
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return self.__mthd
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mthd = property(__get_mthd)
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def __get_prop(self):
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return self.__prop
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prop = property(__get_prop)
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def finalize(self, api):
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super(obj, self).finalize(api)
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self.__mthd = self.__create_ns('mthd')
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self.__prop = self.__create_ns('prop')
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def __create_ns(self, name):
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return plugable.NameSpace(self.__filter(name))
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def __filter(self, name):
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for i in getattr(self.api, name):
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if i.obj_name == self.name:
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yield i._clone('attr_name')
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class attr(plugable.Plugin):
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__obj = None
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def __init__(self):
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m = re.match('^([a-z]+)_([a-z]+)$', self.__class__.__name__)
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assert m
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self.__obj_name = m.group(1)
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self.__attr_name = m.group(2)
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def __get_obj_name(self):
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return self.__obj_name
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obj_name = property(__get_obj_name)
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def __get_attr_name(self):
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return self.__attr_name
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attr_name = property(__get_attr_name)
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def __get_obj(self):
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"""
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Returns the obj instance this attribute is associated with, or None
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if no association has been set.
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"""
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return self.__obj
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obj = property(__get_obj)
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def finalize(self, api):
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super(attr, self).finalize(api)
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self.__obj = api.obj[self.obj_name]
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class mthd(attr, cmd):
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__public__ = frozenset((
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'obj',
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'obj_name',
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))
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class prop(attr):
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__public__ = frozenset((
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'obj',
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'obj_name',
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))
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def get_doc(self, _):
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return _('prop doc')
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class PublicAPI(plugable.API):
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__max_cmd_len = None
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def __init__(self):
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super(PublicAPI, self).__init__(cmd, obj, mthd, prop)
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def __get_max_cmd_len(self):
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if self.__max_cmd_len is None:
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if not hasattr(self, 'cmd'):
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return None
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max_cmd_len = max(len(str(cmd)) for cmd in self.cmd)
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object.__setattr__(self, '_PublicAPI__max_cmd_len', max_cmd_len)
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return self.__max_cmd_len
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max_cmd_len = property(__get_max_cmd_len)
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