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

   1 //
   2 // System.Security.Policy.MembershipConditionHelper.cs
   3 //
   4 // Authors:
   5 //      Ajay kumar Dwivedi (adwiv@yahoo.com)
   6 //      Jackson Harper (jackson@ximian.com)
   7 //      Sebastien Pouliot  <sebastien@ximian.com>
   8 //
   9 // (C) 2002 Jackson Harper, All rights reserved
  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 namespace System.Security.Policy {
  33
  34         internal sealed class MembershipConditionHelper {
  35
  36                 private static readonly string XmlTag = "IMembershipCondition";
  37
  38
  39                 internal static int CheckSecurityElement (SecurityElement se, string parameterName, int minimumVersion, int maximumVersion)
  40                 {
  41                         if (se == null)
  42                                 throw new ArgumentNullException (parameterName);
  43
  44                         // Tag is case-sensitive
  45                         if (se.Tag != XmlTag) {
  46                                 string msg = String.Format (Locale.GetText ("Invalid tag {0}, expected {1}."), se.Tag, XmlTag);
  47                                 throw new ArgumentException (msg, parameterName);
  48                         }
  49
  50                         // Note: we do not care about the class attribute at
  51                         // this stage (in fact we don't even if the class
  52                         // attribute is present or not). Anyway the object has
  53                         // already be created, with success, if we're loading it
  54
  55                         // we assume minimum version if no version number is supplied
  56                         int version = minimumVersion;
  57                         string v = se.Attribute ("version");
  58                         if (v != null) {
  59                                 try {
  60                                         version = Int32.Parse (v);
  61                                 }
  62                                 catch (Exception e) {
  63                                         string msg = Locale.GetText ("Couldn't parse version from '{0}'.");
  64                                         msg = String.Format (msg, v);
  65                                         throw new ArgumentException (msg, parameterName, e);
  66                                 }
  67                         }
  68
  69 /*                      if ((version < minimumVersion) || (version > maximumVersion)) {
  70                                 string msg = Locale.GetText ("Unknown version '{0}', expected versions between ['{1}','{2}'].");
  71                                 msg = String.Format (msg, version, minimumVersion, maximumVersion);
  72                                 throw new ArgumentException (msg, parameterName);
  73                         }*/
  74                         return version;
  75                 }
  76
  77                 // snippet moved from FileIOPermission (nickd) to be reused in all derived classes
  78                 internal static SecurityElement Element (Type type, int version)
  79                 {
  80                         SecurityElement se = new SecurityElement (XmlTag);
  81                         se.AddAttribute ("class", type.FullName + ", " + type.Assembly.ToString ().Replace ('\"', '\''));
  82                         se.AddAttribute ("version", version.ToString ());
  83                         return se;
  84                 }
  85         }
  86 }