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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) 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, with_statement
from threading import RLock
from functools import wraps
from ..helper import error
class UnsupportedSearchTypeError(Exception):
pass
class PkgData (object):
__slots__ = ("cat", "pkg", "inst", "disabled")
def __init__ (self, cat, pkg, inst = False, disabled = False):
self.cat = cat
self.pkg = pkg
self.inst = inst
self.disabled = disabled
def __iter__ (self):
return iter((self.cat, self.pkg, self.inst, self.disabled))
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")
SEARCH_NAME = 1
SEARCH_DESCRIPTION = 2
def __init__ (self):
self._lock = RLock()
self.type = self.SEARCH_NAME
@staticmethod
def lock (f):
@wraps(f)
def wrapper (self, *args, **kwargs):
with self._lock:
r = f(self, *args, **kwargs)
return r
return wrapper
def search_types (self):
"""The types of search supported by the database.
@return: type
@rtype: int"""
raise NotImplentedError
def set_type (self, type):
if type & self.search_types() == 0:
error("Search type %s not supported by database '%s'.", type, self.__class__.__name__)
raise UnsupportedSearchTypeError, type
self._type = type
def get_type (self):
return self._type
type = property(get_type, set_type)
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, showDisabled = False):
"""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
@param showDisabled: should disabled packages be returned
@type showDisabled: 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 disable (self, cpv):
"""Marks the CPV as disabled.
@param cpv: the cpv to mark
"""
raise NotImplentedError
def reload (self, cat = None):
"""Reloads the given category.
@param cat: category
@type cat: string
"""
raise NotImplentedError
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