//
// System.Security.Policy.PermissionRequestEvidence.cs
//
// Authors:
//      Nick Drochak (ndrochak@gol.com)
//	Sebastien Pouliot  <sebastien@ximian.com>
//
// (C) 2003 Nick Drochak
// Copyright (C) 2004-2005 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.Runtime.InteropServices;

namespace System.Security.Policy {

	[Serializable]
	[ComVisible (true)]
	public sealed class PermissionRequestEvidence :
		EvidenceBase,
		IBuiltInEvidence {

		private PermissionSet requested, optional, denied;

		public PermissionRequestEvidence (PermissionSet request, PermissionSet optional, PermissionSet denied) 
		{
			if (request != null)
				this.requested = new PermissionSet (request);
			if (optional != null)
				this.optional = new PermissionSet (optional);
			if (denied != null)
				this.denied = new PermissionSet (denied);
		}

		public PermissionSet DeniedPermissions {
			get { return denied; }
		}

		public PermissionSet OptionalPermissions {
			get { return optional; }
		}

		public PermissionSet RequestedPermissions {
			get { return requested; }
		}

		public PermissionRequestEvidence Copy ()
		{
			return new PermissionRequestEvidence (requested, optional, denied);
		}

		public override string ToString () 
		{
			SecurityElement se = new SecurityElement ("System.Security.Policy.PermissionRequestEvidence");
			se.AddAttribute ("version", "1");

			if (requested != null) {
				SecurityElement requestElement = new SecurityElement ("Request");
				requestElement.AddChild (requested.ToXml ());
				se.AddChild (requestElement);
			}
			if (optional != null) {
				SecurityElement optionalElement = new SecurityElement ("Optional");
				optionalElement.AddChild (optional.ToXml ());
				se.AddChild (optionalElement);
			}
			if (denied != null) {
				SecurityElement deniedElement = new SecurityElement ("Denied");
				deniedElement.AddChild (denied.ToXml ());
				se.AddChild (deniedElement);
			}
			return se.ToString ();
		}

		// interface IBuiltInEvidence

		int IBuiltInEvidence.GetRequiredSize (bool verbose) 
		{
			int size = verbose ? 3 : 1;
			if (requested != null) {
				int r = requested.ToXml ().ToString ().Length + (verbose ? 5 : 0);
				size += r;
			}
			if (optional != null) {
				int o = optional.ToXml ().ToString ().Length + (verbose ? 5 : 0);
				size += o;
			}
			if (denied != null) {
				int d = denied.ToXml ().ToString ().Length + (verbose ? 5 : 0);
				size += d;
			}
			return size;
		}

		[MonoTODO ("IBuiltInEvidence")]
		int IBuiltInEvidence.InitFromBuffer (char [] buffer, int position) 
		{
			return 0;
		}

		[MonoTODO ("IBuiltInEvidence")]
		int IBuiltInEvidence.OutputToBuffer (char [] buffer, int position, bool verbose) 
		{
			return 0;
		}
	}
}
