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                                 Type[] interfaces = type.GetInterfaces();
  50                                 interfacesImplemented = new string[interfaces.Length + 1];
  51                                 for(int n=0; n<interfaces.Length; n++)
  52                                         interfacesImplemented[n] = interfaces[n].AssemblyQualifiedName;
  53                                 interfacesImplemented[interfaces.Length] = type.AssemblyQualifiedName;
  54                         }
  55                         else
  56                         {
  57                                 serverType = type.AssemblyQualifiedName;
  58
  59                                 // base class info
  60
  61                                 int baseCount = 0;
  62                                 Type baseType = type.BaseType;
  63                                 while (baseType != typeof (MarshalByRefObject) && baseType != null)
  64                                 {
  65                                         baseType = baseType.BaseType;
  66                                         baseCount++;
  67                                 }
  68
  69                                 serverHierarchy = new string[baseCount];
  70                                 baseType = type.BaseType;
  71                                 for (int n=0; n<baseCount; n++)
  72                                 {
  73                                         serverHierarchy[n] = baseType.AssemblyQualifiedName;
  74                                         baseType = baseType.BaseType;
  75                                 }
  76
  77                                 // Interfaces info
  78
  79                                 Type[] interfaces = type.GetInterfaces();
  80                                 interfacesImplemented = new string[interfaces.Length];
  81                                 for (int n=0; n<interfaces.Length; n++)
  82                                         interfacesImplemented[n] = interfaces[n].AssemblyQualifiedName;
  83                         }
  84                 }
  85
  86                 public string TypeName
  87                 {
  88                         get { return serverType; }
  89                         set { serverType = value; }
  90                 }
  91
  92                 public bool CanCastTo (Type fromType, object o)
  93                 {
  94                         if (fromType == typeof (object)) return true;
  95                         if (fromType == typeof (MarshalByRefObject)) return true;
  96
  97                         string fromName = fromType.AssemblyQualifiedName;
  98
  99                         // Find the type comparing the name of the type and the name of the assembly,
 100                         // excluding version and other assembly info
 101
 102                         int i = fromName.IndexOf (',');
 103                         if (i != -1) i = fromName.IndexOf (',', i+1);
 104                         if (i != -1) fromName = fromName.Substring (0,i+1);
 105                         else fromName += ",";
 106
 107                         if ( (serverType + ",").StartsWith (fromName)) return true;
 108
 109                         if (serverHierarchy != null)
 110                                 foreach (string basec in serverHierarchy)
 111                                         if ( (basec + ",").StartsWith (fromName)) return true;
 112
 113                         if (interfacesImplemented != null)
 114                                 foreach (string basec in interfacesImplemented)
 115                                         if ( (basec + ",").StartsWith (fromName)) return true;
 116
 117                         return false;
 118                 }
 119         }
 120 }