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Zope: zope.security/trunk/src/zope/security/protectclass.py
##############################################################################
#
# 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.
#
##############################################################################
"""Make assertions about permissions needed to access class instances
attributes
"""
from zope.security.checker import defineChecker, getCheckerForInstancesOf
from zope.security.checker import Checker, CheckerPublic
def protectName(class_, name, permission):
"""Set a permission on a particular name."""
checker = getCheckerForInstancesOf(class_)
if checker is None:
checker = Checker({}, {})
defineChecker(class_, checker)
if permission == 'zope.Public':
# Translate public permission to CheckerPublic
permission = CheckerPublic
# We know a dictionary was used because we set it
protections = checker.get_permissions
protections[name] = permission
def protectSetAttribute(class_, name, permission):
"""Set a permission on a particular name."""
checker = getCheckerForInstancesOf(class_)
if checker is None:
checker = Checker({}, {})
defineChecker(class_, checker)
if permission == 'zope.Public':
# Translate public permission to CheckerPublic
permission = CheckerPublic
# We know a dictionary was used because we set it
# Note however, that if a checker was created manually
# and the caller used say NamesChecker or MultiChecker,
# then set_permissions may be None here as Checker
# defaults a missing set_permissions parameter to None.
# Jim says this doensn't happens with the C version of the
# checkers because they use a 'shared dummy dict'.
protections = checker.set_permissions
protections[name] = permission
def protectLikeUnto(class_, like_unto):
"""Use the protections from like_unto for class_"""
unto_checker = getCheckerForInstancesOf(like_unto)
if unto_checker is None:
return
# We know a dictionary was used because we set it
# Note however, that if a checker was created manually
# and the caller used say NamesChecker or MultiChecker,
# then set_permissions may be None here as Checker
# defaults a missing set_permissions parameter to None.
# Jim says this doensn't happens with the C version of the
# checkers because they use a 'shared dummy dict'.
unto_get_protections = unto_checker.get_permissions
unto_set_protections = unto_checker.set_permissions
checker = getCheckerForInstancesOf(class_)
if checker is None:
checker = Checker({}, {})
defineChecker(class_, checker)
get_protections = checker.get_permissions
for name in unto_get_protections:
get_protections[name] = unto_get_protections[name]
set_protections = checker.set_permissions
for name in unto_set_protections:
set_protections[name] = unto_set_protections[name]
