mcs/class/corlib/System.Security.Policy/ZoneMembershipCondition.cs

   1 //
   2 // System.Security.Policy.ZoneMembershipCondition.cs
   3 //
   4 // Author:
   5 //   Duncan Mak (duncan@ximian.com)
   6 //
   7 // (C) 2003, Ximian Inc.
   8 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System;
  31 using System.Globalization;
  32
  33 namespace System.Security.Policy {
  34
  35         [Serializable]
  36         public sealed class ZoneMembershipCondition
  37                 : IMembershipCondition, ISecurityEncodable, ISecurityPolicyEncodable, IConstantMembershipCondition
  38         {
  39                 SecurityZone zone;
  40
  41                 // so System.Activator.CreateInstance can create an instance...
  42                 internal ZoneMembershipCondition ()
  43                 {
  44                 }
  45
  46                 public ZoneMembershipCondition (SecurityZone zone)
  47                 {
  48                         this.zone = zone;
  49                 }
  50
  51                 public SecurityZone SecurityZone {
  52                         set { zone = value; }
  53                         get { return zone; }
  54                 }
  55
  56                 public bool Check (Evidence evidence)
  57                 {
  58                         if (evidence == null)
  59                                 return false;
  60
  61                         foreach (object o in evidence) {
  62                                 if (o is Zone) {
  63                                         Zone z = (o as Zone);
  64                                         if (z.SecurityZone == zone)
  65                                                 return true;
  66                                 }
  67                         }
  68                         return false;
  69                 }
  70
  71                 public IMembershipCondition Copy ()
  72                 {
  73                         return new ZoneMembershipCondition (zone);
  74                 }
  75
  76                 public override bool Equals (Object o)
  77                 {
  78                         if (o is ZoneMembershipCondition == false)
  79                                 return false;
  80                         else
  81                                 return ((ZoneMembershipCondition) o).SecurityZone == zone;
  82                 }
  83
  84                 public void FromXml (SecurityElement element)
  85                 {
  86                         FromXml (element, null);
  87                 }
  88
  89                 public void FromXml (SecurityElement element, PolicyLevel level)
  90                 {
  91                         if (element == null)
  92                                 throw new ArgumentNullException (
  93                                         Locale.GetText ("The argument is null."));
  94
  95                         if (element.Attribute ("version") != "1")
  96                                 throw new ArgumentException (
  97                                         Locale.GetText ("The argument is invalid."));
  98
  99                         zone = (SecurityZone) Enum.Parse (
 100                                 typeof (SecurityZone), element.Attribute ("Zone"));
 101                 }
 102
 103                 public override int GetHashCode ()
 104                 {
 105                         return zone.GetHashCode ();
 106                 }
 107
 108                 public override string ToString ()
 109                 {
 110                         return "Zone - " + zone;
 111                 }
 112
 113                 public SecurityElement ToXml ()
 114                 {
 115                         return ToXml (null);
 116                 }
 117
 118                 public SecurityElement ToXml (PolicyLevel level)
 119                 {
 120                         SecurityElement element = new SecurityElement ("IMembershipCondition");
 121                         element.AddAttribute ("version", "1");
 122
 123                         element.AddAttribute ("Zone", zone.ToString ());
 124
 125                         return element;
 126                 }
 127         }
 128 }