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