# Copyright (C) 2004 Nicolas Delon <nicolas@prelude-ids.org>
# All Rights Reserved
#
# This file is part of the Prelude program.
#
# 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, 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; see the file COPYING.  If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.


import shelve

MODE_READ =  "r"
MODE_RW =    "w"   
MODE_TRUNC = "n"

class DBM:
    def __init__(self, filename, mode):
        self.db = shelve.open(filename, mode)
        self.retrieved = { }
        for filename in self.db.keys():
            self.retrieved[filename] = False

    def print_(self):
        for filename in self.db.keys():
            print self.db[filename]

    def getRemainings(self):
        return filter(lambda f: not self.retrieved[f], self.db.keys())

    def __setitem__(self, filename, file):
        self.db[filename] = file

    def __getitem__(self, filename):
        self.retrieved[filename] = True
        return self.db[filename]

    def __delitem__(self, filename):
        del self.db[filename]

    def getFiles(self):
        return self.db.keys() # FIXME