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# -*- coding: utf-8 -*-
#
# File: portato/db/database.py
# This file is part of the Portato-Project, a graphical portage-frontend.
#
# Copyright (C) 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, with_statement
from threading import RLock
from functools import wraps
class PkgData (object):
__slots__ = ("cat", "pkg", "inst")
def __init__ (self, cat, pkg, inst):
self.cat = cat
self.pkg = pkg
self.inst = inst
def __iter__ (self):
return iter((self.cat, self.pkg, self.inst))
def __cmp__ (self, other):
return cmp(self.pkg.lower(), other.pkg.lower())
def __repr__ (self):
return "<Package (%(cat)s, %(pkg)s, %(inst)s)>" % {"cat" : self.cat, "pkg" : self.pkg, "inst" : self.inst}
class Database (object):
ALL = _("ALL")
def __init__ (self):
self._lock = RLock()
@staticmethod
def lock (f):
@wraps(f)
def wrapper (self, *args, **kwargs):
with self._lock:
r = f(self, *args, **kwargs)
return r
return wrapper
def populate (self, category = None):
"""Populates the database.
@param category: An optional category - so only packages of this category are inserted.
@type category: string
"""
raise NotImplentedError
def get_cat (self, cat = None, byName = True):
"""Returns the packages in the category.
@param cat: category to return the packages from; if None it defaults to C{ALL}
@type cat: string
@param byName: selects whether to return the list sorted by name or by installation
@type byName: boolean
@return: an iterator over the packages
@rtype: L{PkgData}<iterator>
"""
raise NotImplentedError
def get_categories (self, installed = False):
"""Returns all categories.
@param installed: Only return these with at least one installed package.
@type installed: boolean
@returns: the list of categories
@rtype: string<iterator>
"""
raise NotImplentedError
def reload (self, cat = None):
"""Reloads the given category.
@param cat: category
@type cat: string
"""
raise NotImplentedError
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