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# -*- coding: utf-8 -*-
#
# File: portato/db/__init__.py
# This file is part of the Portato-Project, a graphical portage-frontend.
#
# Copyright (C) 2006-2009 René 'Necoro' Neumann
# This is free software. You may redistribute copies of it under the terms of
# the GNU General Public License version 2.
# There is NO WARRANTY, to the extent permitted by law.
#
# Written by René 'Necoro' Neumann <necoro@necoro.net>
from __future__ import absolute_import
from ..session import Session, SectionDict
from ..helper import debug, warning, error
class UnknownDatabaseTypeError (Exception):
pass
_SESSION = None
types = {
"sql": (_("SQLite"), _("Uses an SQLite-database to store package information.\nMay take longer to generate at the first time, but has advantages if portato is re-started with an unchanged portage tree. Additionally it allows to use fast SQL expressions for fetching the data.")),
"dict": (_("Hashmap"), _("Uses an in-memory hashmap to store package information.\nHas been used since at least version 0.3.3, but all information has to be regenerated on each startup."))
}
def Database(type):
global _SESSION
if _SESSION is None:
_SESSION = Session("db.cfg", name = "DB")
_SESSION.load()
if type == "sql":
debug("Using SQLDatabase")
try:
from .sql import SQLDatabase
except ImportError:
warning(_("Cannot load SQLDatabase."))
_TYPE = "dict"
return Database()
else:
return SQLDatabase(SectionDict(_SESSION, "SQL"))
elif type == "dict":
debug("Using DictDatabase")
from .dict import DictDatabase
return DictDatabase(SectionDict(_SESSION, "dict"))
else:
error(_("Unknown database type: %s"), type)
raise UnknownDatabaseTypeError, "type"
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