96 lines
3.2 KiB
C#
96 lines
3.2 KiB
C#
//
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// System.Security.PermissionBuilder.cs
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//
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// Author:
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// Sebastien Pouliot <sebastien@ximian.com>
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//
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// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Security.Permissions;
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namespace System.Security {
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internal static class PermissionBuilder {
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private static object[] psNone = new object [1] { PermissionState.None };
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// can be used to create an empty or an unrestricted permission from any valid type
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static public IPermission Create (string fullname, PermissionState state)
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{
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if (fullname == null)
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throw new ArgumentNullException ("fullname");
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SecurityElement se = new SecurityElement ("IPermission");
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se.AddAttribute ("class", fullname);
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se.AddAttribute ("version", "1");
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if (state == PermissionState.Unrestricted)
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se.AddAttribute ("Unrestricted", "true");
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return CreatePermission (fullname, se);
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}
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static public IPermission Create (SecurityElement se)
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{
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if (se == null)
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throw new ArgumentNullException ("se");
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string className = se.Attribute ("class");
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if ((className == null) || (className.Length == 0))
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throw new ArgumentException ("class");
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return CreatePermission (className, se);
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}
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// to use in case where the "class" attribute isn't a fully qualified class name
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static public IPermission Create (string fullname, SecurityElement se)
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{
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if (fullname == null)
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throw new ArgumentNullException ("fullname");
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if (se == null)
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throw new ArgumentNullException ("se");
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return CreatePermission (fullname, se);
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}
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static public IPermission Create (Type type)
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{
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// note: unification is handled in lower levels
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// http://blogs.msdn.com/shawnfa/archive/2004/08/05/209320.aspx
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return (IPermission) Activator.CreateInstance (type, psNone);
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}
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// internal stuff
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internal static IPermission CreatePermission (string fullname, SecurityElement se)
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{
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Type classType = Type.GetType (fullname);
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if (classType == null) {
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string msg = Locale.GetText ("Can't create an instance of permission class {0}.");
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throw new TypeLoadException (String.Format (msg, fullname));
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}
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IPermission p = Create (classType);
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p.FromXml (se);
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return p;
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}
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}
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}
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