# -*- coding: utf-8 -*-
"sqlite3 cache"
# Copyright (C) 2013 Team tiramisu (see AUTHORS for all contributors)
#
# 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; either version 2 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 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
#
# ____________________________________________________________
try:
    from cPickle import loads, dumps
except ImportError:
    from pickle import loads, dumps
from ..util import Cache


class Sqlite3DB(Cache):
    __slots__ = tuple()
    def _sqlite_decode_path(self, path):
        if path == '_none':
            return None
        else:
            return path

    def _sqlite_encode_path(self, path):
        if path is None:
            return '_none'
        else:
            return path

    def _sqlite_decode(self, value):
        return loads(value)

    def _sqlite_encode(self, value):
        if isinstance(value, list):
            value = list(value)
        return dumps(value)