mcs/class/corlib/System.Runtime.Remoting/TypeInfo.cs

   1 //
   2 // System.Runtime.Remoting.TypeInfo.cs
   3 //
   4 // Author: Lluis Sanchez Gual (lluis@ideary.com)
   5 //
   6 // (C) 2003, Lluis Sanchez Gual
   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
  34 namespace System.Runtime.Remoting
  35 {
  36         [Serializable]
  37         internal class TypeInfo : IRemotingTypeInfo
  38         {
  39                 string serverType;
  40                 string[] serverHierarchy;
  41                 string[] interfacesImplemented;
  42
  43                 public TypeInfo(Type type)
  44                 {
  45                         if (type.IsInterface)
  46                         {
  47                                 serverType = typeof (MarshalByRefObject).AssemblyQualifiedName;
  48                                 serverHierarchy = new string[0];
  49                                 interfacesImplemented = new string[] { type.AssemblyQualifiedName };
  50                         }
  51                         else
  52                         {
  53                                 serverType = type.AssemblyQualifiedName;
  54
  55                                 // base class info
  56
  57                                 int baseCount = 0;
  58                                 Type baseType = type.BaseType;
  59                                 while (baseType != typeof (MarshalByRefObject) && baseType != typeof(object))
  60                                 {
  61                                         baseType = baseType.BaseType;
  62                                         baseCount++;
  63                                 }
  64
  65                                 serverHierarchy = new string[baseCount];
  66                                 baseType = type.BaseType;
  67                                 for (int n=0; n<baseCount; n++)
  68                                 {
  69                                         serverHierarchy[n] = baseType.AssemblyQualifiedName;
  70                                         baseType = baseType.BaseType;
  71                                 }
  72
  73                                 // Interfaces info
  74
  75                                 Type[] interfaces = type.GetInterfaces();
  76                                 interfacesImplemented = new string[interfaces.Length];
  77                                 for (int n=0; n<interfaces.Length; n++)
  78                                         interfacesImplemented[n] = interfaces[n].AssemblyQualifiedName;
  79                         }
  80                 }
  81
  82                 public string TypeName
  83                 {
  84                         get { return serverType; }
  85                         set { serverType = value; }
  86                 }
  87
  88                 public bool CanCastTo (Type fromType, object o)
  89                 {
  90                         if (fromType == typeof (object)) return true;
  91                         if (fromType == typeof (MarshalByRefObject)) return true;
  92
  93                         string fromName = fromType.AssemblyQualifiedName;
  94
  95                         // Find the type comparing the name of the type and the name of the assembly,
  96                         // excluding version and other assembly info
  97
  98                         int i = fromName.IndexOf (',');
  99                         if (i != -1) i = fromName.IndexOf (',', i+1);
 100                         if (i != -1) fromName = fromName.Substring (0,i+1);
 101                         else fromName += ",";
 102
 103                         if ( (serverType + ",").StartsWith (fromName)) return true;
 104
 105                         if (serverHierarchy != null)
 106                                 foreach (string basec in serverHierarchy)
 107                                         if ( (basec + ",").StartsWith (fromName)) return true;
 108
 109                         if (interfacesImplemented != null)
 110                                 foreach (string basec in interfacesImplemented)
 111                                         if ( (basec + ",").StartsWith (fromName)) return true;
 112
 113                         return false;
 114                 }
 115         }
 116 }