mcs/class/corlib/System/UnitySerializationHolder.cs

   1 //
   2 // System.UnitySerializationHolder.cs
   3 //
   4 // Author:
   5 //   Lluis Sanchez Gual (lsg@ctv.es)
   6 //
   7 // (C) 2003 Lluis Sanchez Gual
   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.Reflection;
  34 using System.Runtime.Serialization;
  35
  36 namespace System
  37 {
  38         [Serializable]
  39         internal class UnitySerializationHolder : IObjectReference, ISerializable
  40         {
  41                 string _data;
  42                 UnityType _unityType;
  43                 string _assemblyName;
  44
  45                 // FIXME: there must be other types that use UnitySerializationHolder for
  46                 // serialization, but I don't know yet which ones.
  47
  48                 enum UnityType: byte
  49                 {
  50                         DBNull = 2,
  51                         Type = 4,
  52                         Module = 5,
  53                         Assembly = 6
  54                 }
  55
  56                 UnitySerializationHolder (SerializationInfo info, StreamingContext ctx)
  57                 {
  58                         _data = info.GetString ("Data");
  59                         _unityType = (UnityType) info.GetInt32 ("UnityType");
  60                         _assemblyName = info.GetString ("AssemblyName");
  61                 }
  62
  63                 public static void GetTypeData (Type instance, SerializationInfo info, StreamingContext ctx)
  64                 {
  65                         info.AddValue ("Data", instance.FullName);
  66                         info.AddValue ("UnityType", (int) UnityType.Type);
  67                         info.AddValue ("AssemblyName", instance.Assembly.FullName);
  68                         info.SetType (typeof (UnitySerializationHolder));
  69                 }
  70
  71                 public static void GetDBNullData (DBNull instance, SerializationInfo info, StreamingContext ctx)
  72                 {
  73                         info.AddValue ("Data", null);
  74                         info.AddValue ("UnityType", (int) UnityType.DBNull);
  75                         info.AddValue ("AssemblyName", instance.GetType().Assembly.FullName);
  76                         info.SetType (typeof (UnitySerializationHolder));
  77                 }
  78
  79                 public static void GetAssemblyData (Assembly instance, SerializationInfo info, StreamingContext ctx)
  80                 {
  81                         info.AddValue ("Data", instance.FullName);
  82                         info.AddValue ("UnityType", (int) UnityType.Assembly);
  83                         info.AddValue ("AssemblyName", instance.FullName);
  84                         info.SetType (typeof (UnitySerializationHolder));
  85                 }
  86
  87                 public static void GetModuleData (Module instance, SerializationInfo info, StreamingContext ctx)
  88                 {
  89                         info.AddValue ("Data", instance.ScopeName);
  90                         info.AddValue ("UnityType", (int) UnityType.Module);
  91                         info.AddValue ("AssemblyName", instance.Assembly.FullName);
  92                         info.SetType (typeof (UnitySerializationHolder));
  93                 }
  94
  95                 public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
  96                 {
  97                         // Not needed.
  98                         throw new NotSupportedException();
  99                 }
 100
 101                 public virtual object GetRealObject (StreamingContext context)
 102                 {
 103                         switch (_unityType) {
 104                         case UnityType.Type: {
 105                                 Assembly assembly = Assembly.Load (_assemblyName);
 106                                 return assembly.GetType (_data);
 107                         }
 108                         case UnityType.DBNull:
 109                                 return DBNull.Value;
 110                         case UnityType.Module: {
 111                                 Assembly assembly = Assembly.Load (_assemblyName);
 112                                 return assembly.GetModule (_data);
 113                         }
 114                         case UnityType.Assembly:
 115                                 return Assembly.Load (_data);
 116                         default:
 117                                 throw new NotSupportedException (Locale.GetText
 118                                         ("UnitySerializationHolder does not support this type."));
 119                         }
 120                 }
 121         }
 122 }