mcs/class/corlib/System.Security.Permissions/IsolatedStoragePermission.cs

   1 //
   2 // System.Security.Permissions.IsolatedStoragePermission.cs
   3 //
   4 // Piers Haken <piersh@friskit.com>
   5 //
   6 // (C) 2002 Ximian, Inc.                        http://www.ximian.com
   7 //
   8
   9 //
  10 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System;
  33 using System.Globalization;
  34 using System.Security.Permissions;
  35
  36 namespace System.Security.Permissions
  37 {
  38         [Serializable]
  39         public abstract class IsolatedStoragePermission : CodeAccessPermission, IUnrestrictedPermission
  40         {
  41                 internal long m_userQuota;
  42                 internal long m_machineQuota;
  43                 internal long m_expirationDays;
  44                 internal bool m_permanentData;
  45                 internal IsolatedStorageContainment m_allowed;
  46
  47                 public IsolatedStoragePermission (PermissionState state)
  48                 {
  49                         if (state == PermissionState.None)
  50                         {
  51                                 m_userQuota = 0;
  52                                 m_machineQuota = 0;
  53                                 m_expirationDays = 0;
  54                                 m_permanentData = false;
  55                                 m_allowed = IsolatedStorageContainment.None;
  56                         }
  57                         else if (state == PermissionState.Unrestricted)
  58                         {
  59                                 m_userQuota = Int64.MaxValue;
  60                                 m_machineQuota = Int64.MaxValue;
  61                                 m_expirationDays = Int64.MaxValue ;
  62                                 m_permanentData = true;
  63                                 m_allowed = IsolatedStorageContainment.UnrestrictedIsolatedStorage;
  64                         }
  65                         else
  66                         {
  67                                 throw new ArgumentException("Invalid Permission state");
  68                         }
  69                 }
  70
  71                 public long UserQuota
  72                 {
  73                         set { m_userQuota = value; }
  74                         get { return m_userQuota; }
  75                 }
  76
  77
  78                 public IsolatedStorageContainment UsageAllowed
  79                 {
  80                         set { m_allowed = value; }
  81                         get { return m_allowed; }
  82                 }
  83
  84
  85                 public bool IsUnrestricted ()
  86                 {
  87                         return IsolatedStorageContainment.UnrestrictedIsolatedStorage == m_allowed;
  88                 }
  89
  90                 public override SecurityElement ToXml ()
  91                 {
  92                         SecurityElement e = new SecurityElement ("IPermission");
  93                         e.AddAttribute ("class", GetType ().AssemblyQualifiedName);
  94                         e.AddAttribute ("version", "1");
  95
  96                         if (m_allowed == IsolatedStorageContainment.UnrestrictedIsolatedStorage)
  97                                 e.AddAttribute ("Unrestricted", "true");
  98
  99                         else if (m_allowed == IsolatedStorageContainment.None)
 100                                 e.AddAttribute ("Allowed", "None");
 101
 102                         return e;
 103                 }
 104
 105
 106                 public override void FromXml (SecurityElement esd)
 107                 {
 108                         if (esd == null)
 109                                 throw new ArgumentNullException (
 110                                         Locale.GetText ("The argument is null."));
 111
 112                         if (esd.Attribute ("class") != GetType ().AssemblyQualifiedName)
 113                                 throw new ArgumentException (
 114                                         Locale.GetText ("The argument is not valid"));
 115
 116                         if (esd.Attribute ("version") != "1")
 117                                 throw new ArgumentException (
 118                                         Locale.GetText ("The argument is not valid"));
 119
 120                         if (esd.Attribute ("Unrestricted") == "true")
 121                                 m_allowed = IsolatedStorageContainment.UnrestrictedIsolatedStorage;
 122
 123                         else if (esd.Attribute ("Allowed") == "None")
 124                                 m_allowed = IsolatedStorageContainment.None;
 125                 }
 126         }
 127 }
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