--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ztfy/utils/security.py	Sat Jan 10 00:35:35 2009 +0100
@@ -0,0 +1,47 @@
+##############################################################################
+#
+# Copyright (c) 2008 Thierry Florac <tflorac AT ulthar.net>
+# 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.
+#
+##############################################################################
+"""
+
+$Id: $
+"""
+
+__version__   = "$Revision: $"
+__release__   = "$Id: $"
+__docformat__ = "restructuredtext"
+ 
+# import standard packages
+
+# import Zope3 interfaces
+
+# import local interfaces
+
+# import Zope3 packages
+from zope.security.proxy import removeSecurityProxy
+
+# import local packages
+
+
+def unproxied(value):
+    """Remove security proxies from given value ; if value is a list or dict, all elements are unproxied"""
+    if isinstance(value, list):
+        result = []
+        for v in value:
+            result.append(removeSecurityProxy(v))
+    elif isinstance(value, dict):
+        result = value.copy()
+        for v in value:
+            result[v] = removeSecurityProxy(value[v])
+    else:
+        result = removeSecurityProxy(value)
+    return result