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# dfresize.py
# DeviceFormat resizing classes.
#
# Copyright (C) 2015  Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties 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., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#
# Red Hat Author(s): Anne Mulhern <amulhern@redhat.com>

import abc

from six import add_metaclass

from . import task


@add_metaclass(abc.ABCMeta)
class DFResizeTask(task.Task):
    """ The abstract properties that any resize task must have. """

    unit = abc.abstractproperty(doc="Resize unit.")


class UnimplementedDFResize(task.UnimplementedTask, DFResizeTask):

    def __init__(self, a_df):
        """ Initializer.

            :param DeviceFormat a_df: a device format object
        """
        self.df = a_df

    @property
    def unit(self):
        raise NotImplementedError()