# Copyright 2015 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2


class DummyTree:
    """
    Most internal code only accesses the "dbapi" attribute of the
    binarytree, portagetree, and vartree classes. DummyTree is useful
    in cases where alternative dbapi implementations (or wrappers that
    modify or extend behavior of existing dbapi implementations) are
    needed, since it allows these implementations to be exposed through
    an interface which is minimally compatible with the *tree classes.
    """

    __slots__ = ("dbapi",)

    def __init__(self, dbapi):
        self.dbapi = dbapi