/usr/share/pyshared/zope/securitypolicy/securitymap.py is in python-zope.securitypolicy 3.7.0-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright (c) 2001, 2002 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Generic two-dimensional array type (in context of security)
"""
from persistent import Persistent
from zope.annotation import IAnnotations
from zope.security.management import queryInteraction
class SecurityMap(object):
def __init__(self):
self._clear()
def _clear(self):
self._byrow = {}
self._bycol = {}
def __nonzero__(self):
return bool(self._byrow)
def addCell(self, rowentry, colentry, value):
# setdefault may get expensive if an empty mapping is
# expensive to create, for PersistentDict for instance.
row = self._byrow.get(rowentry)
if row:
if row.get(colentry) is value:
return False
else:
row = self._byrow[rowentry] = {}
col = self._bycol.get(colentry)
if not col:
col = self._bycol[colentry] = {}
row[colentry] = value
col[rowentry] = value
self._invalidated_interaction_cache()
return True
def _invalidated_interaction_cache(self):
# Invalidate this threads interaction cache
interaction = queryInteraction()
if interaction is not None:
try:
invalidate_cache = interaction.invalidate_cache
except AttributeError:
pass
else:
invalidate_cache()
def delCell(self, rowentry, colentry):
row = self._byrow.get(rowentry)
if row and (colentry in row):
del row[colentry]
if not row:
del self._byrow[rowentry]
col = self._bycol[colentry]
del col[rowentry]
if not col:
del self._bycol[colentry]
self._invalidated_interaction_cache()
return True
return False
def queryCell(self, rowentry, colentry, default=None):
row = self._byrow.get(rowentry)
if row:
return row.get(colentry, default)
else:
return default
def getCell(self, rowentry, colentry):
marker = object()
cell = self.queryCell(rowentry, colentry, marker)
if cell is marker:
raise KeyError('Not a valid row and column pair.')
return cell
def getRow(self, rowentry):
row = self._byrow.get(rowentry)
if row:
return row.items()
else:
return []
def getCol(self, colentry):
col = self._bycol.get(colentry)
if col:
return col.items()
else:
return []
def getAllCells(self):
res = []
for r in self._byrow.keys():
for c in self._byrow[r].items():
res.append((r,) + c)
return res
class PersistentSecurityMap(SecurityMap, Persistent):
def addCell(self, rowentry, colentry, value):
if SecurityMap.addCell(self, rowentry, colentry, value):
self._p_changed = 1
def delCell(self, rowentry, colentry):
if SecurityMap.delCell(self, rowentry, colentry):
self._p_changed = 1
class AnnotationSecurityMap(SecurityMap):
def __init__(self, context):
self.__parent__ = context
self._context = context
annotations = IAnnotations(self._context)
map = annotations.get(self.key)
if map is None:
self._byrow = {}
self._bycol = {}
else:
self._byrow = map._byrow
self._bycol = map._bycol
self.map = map
def _changed(self):
map = self.map
if isinstance(map, PersistentSecurityMap):
map._p_changed = 1
else:
map = PersistentSecurityMap()
map._byrow = self._byrow
map._bycol = self._bycol
annotations = IAnnotations(self._context)
annotations[self.key] = map
def addCell(self, rowentry, colentry, value):
if SecurityMap.addCell(self, rowentry, colentry, value):
self._changed()
def delCell(self, rowentry, colentry):
if SecurityMap.delCell(self, rowentry, colentry):
self._changed()
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