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 //
   9
  10 using System;
  11 using System.Globalization;
  12
  13 namespace System.Security.Policy {
  14
  15         public sealed class ZoneMembershipCondition
  16                 : IMembershipCondition, ISecurityEncodable, ISecurityPolicyEncodable, IConstantMembershipCondition
  17         {
  18                 SecurityZone zone;
  19
  20                 public ZoneMembershipCondition (SecurityZone zone)
  21                 {
  22                         this.zone = zone;
  23                 }
  24
  25                 public SecurityZone SecurityZone {
  26                         set { zone = value; }
  27                         get { return zone; }
  28                 }
  29
  30                 public bool Check (Evidence evidence)
  31                 {
  32                         if (evidence == null)
  33                                 return false;
  34
  35                         foreach (object o in evidence) {
  36                                 if (o is Zone) {
  37                                         Zone z = (o as Zone);
  38                                         if (z.SecurityZone == zone)
  39                                                 return true;
  40                                 }
  41                         }
  42                         return false;
  43                 }
  44
  45                 public IMembershipCondition Copy ()
  46                 {
  47                         return new ZoneMembershipCondition (zone);
  48                 }
  49
  50                 public override bool Equals (Object o)
  51                 {
  52                         if (o is ZoneMembershipCondition == false)
  53                                 return false;
  54                         else
  55                                 return ((ZoneMembershipCondition) o).SecurityZone == zone;
  56                 }
  57
  58                 public void FromXml (SecurityElement element)
  59                 {
  60                         FromXml (element, null);
  61                 }
  62
  63                 public void FromXml (SecurityElement element, PolicyLevel level)
  64                 {
  65                         if (element == null)
  66                                 throw new ArgumentNullException (
  67                                         Locale.GetText ("The argument is null."));
  68
  69                         if (element.Attribute ("class") != GetType ().AssemblyQualifiedName)
  70                                 throw new ArgumentException (
  71                                         Locale.GetText ("The argument is invalid."));
  72
  73                         if (element.Attribute ("version") != "1")
  74                                 throw new ArgumentException (
  75                                         Locale.GetText ("The argument is invalid."));
  76
  77                         zone = (SecurityZone) Enum.Parse (
  78                                 typeof (SecurityZone), element.Attribute ("Zone"));
  79                 }
  80
  81                 public override int GetHashCode ()
  82                 {
  83                         return zone.GetHashCode ();
  84                 }
  85
  86                 public override string ToString ()
  87                 {
  88                         return "Zone - " + zone;
  89                 }
  90
  91                 public SecurityElement ToXml ()
  92                 {
  93                         return ToXml (null);
  94                 }
  95
  96                 public SecurityElement ToXml (PolicyLevel level)
  97                 {
  98                         SecurityElement element = new SecurityElement ("IMembershipCondition");
  99                         element.AddAttribute ("version", "1");
 100
 101                         element.AddAttribute ("Zone", zone.ToString ());
 102
 103                         return element;
 104                 }
 105         }
 106 }