# authentic2 - versatile identity manager
# Copyright (C) 2010-2019 Entr'ouvert
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import abc


class BaseAttributeSource(metaclass=abc.ABCMeta):
    """
    Base class for attribute sources
    """

    @abc.abstractmethod
    def get_instances(self, ctx):
        pass

    @abc.abstractmethod
    def get_attribute_names(self, instance, ctx):
        pass

    @abc.abstractmethod
    def get_attributes(self, instance, ctx):
        pass

    @abc.abstractmethod
    def get_dependencies(self, instance, ctx):
        pass
