mcs/class/corlib/System.Runtime.Serialization.Formatters.Binary/ObjectReader.cs

   1 // ObjectReader.cs\r
   2 //\r
   3 // Author:\r
   4 //   Lluis Sanchez Gual (lluis@ideary.com)\r
   5 //   Patrik Torstensson\r
   6 //\r
   7 // (C) 2003 Lluis Sanchez Gual\r
   8 \r
   9 // FIXME: Implement the missing binary elements\r
  10 \r
  11 using System;\r
  12 using System.Runtime.Serialization;\r
  13 using System.IO;\r
  14 using System.Collections;\r
  15 using System.Reflection;\r
  16 using System.Runtime.Remoting.Messaging;\r
  17 \r
  18 namespace System.Runtime.Serialization.Formatters.Binary\r
  19 {\r
  20         internal class ObjectReader\r
  21         {\r
  22                 BinaryFormatter _formatter;\r
  23                 ISurrogateSelector _surrogateSelector;\r
  24                 StreamingContext _context;\r
  25                 SerializationBinder _binder;\r
  26                 \r
  27 #if NET_1_1\r
  28                 TypeFilterLevel _filterLevel;\r
  29 #endif\r
  30 \r
  31                 ObjectManager _manager;\r
  32                 Hashtable _registeredAssemblies = new Hashtable();\r
  33                 Hashtable _typeMetadataCache = new Hashtable();\r
  34 \r
  35                 object _lastObject = null;\r
  36                 long _lastObjectID = 0;\r
  37                 long _rootObjectID = 0;\r
  38 \r
  39                 class TypeMetadata\r
  40                 {\r
  41                         public Type Type;\r
  42                         public Type[] MemberTypes;\r
  43                         public string[] MemberNames;\r
  44                         public MemberInfo[] MemberInfos;\r
  45                         public int FieldCount;\r
  46                         public bool NeedsSerializationInfo;\r
  47                 }\r
  48 \r
  49                 class ArrayNullFiller\r
  50                 {\r
  51                         public ArrayNullFiller(int count) { NullCount = count; }\r
  52                         public int NullCount;\r
  53                 }\r
  54 \r
  55                 public ObjectReader (BinaryFormatter formatter)\r
  56                 {\r
  57                         _formatter = formatter;\r
  58                         _surrogateSelector = formatter.SurrogateSelector;\r
  59                         _context = formatter.Context;\r
  60                         _binder = formatter.Binder;\r
  61                         _manager = new ObjectManager (_surrogateSelector, _context);\r
  62                         \r
  63 #if NET_1_1\r
  64                         _filterLevel = formatter.FilterLevel;\r
  65 #endif\r
  66                 }\r
  67 \r
  68                 public void ReadObjectGraph (BinaryReader reader, bool readHeaders, out object result, out Header[] headers)\r
  69                 {\r
  70                         headers = null;\r
  71 \r
  72                         // Reads the objects. The first object in the stream is the\r
  73                         // root object.\r
  74 \r
  75                         while (ReadNextObject (reader))\r
  76                         {\r
  77                                 if (readHeaders && (headers == null))\r
  78                                         headers = (Header[])CurrentObject;\r
  79                                 else\r
  80                                         if (_rootObjectID == 0) _rootObjectID = _lastObjectID;\r
  81                         }\r
  82 \r
  83                         result = _manager.GetObject (_rootObjectID);\r
  84                 }\r
  85 \r
  86                 public bool ReadNextObject (BinaryReader reader)\r
  87                 {\r
  88                         BinaryElement element = (BinaryElement)reader.ReadByte ();\r
  89                         if (element == BinaryElement.End)\r
  90                         {\r
  91                                 _manager.DoFixups();\r
  92 \r
  93                                 _manager.RaiseDeserializationEvent();\r
  94                                 return false;\r
  95                         }\r
  96 \r
  97                         SerializationInfo info;\r
  98                         long objectId;\r
  99 \r
 100                         ReadObject (element, reader, out objectId, out _lastObject, out info);\r
 101 \r
 102                         if (objectId != 0) {\r
 103                                 RegisterObject (objectId, _lastObject, info, 0, null, null);\r
 104                                 _lastObjectID = objectId;               \r
 105                         }\r
 106         \r
 107                         return true;\r
 108                 }\r
 109 \r
 110                 public object CurrentObject\r
 111                 {\r
 112                         get { return _lastObject; }\r
 113                 }\r
 114 \r
 115                 // Reads an object from the stream. The object is registered in the ObjectManager.\r
 116                 // The result can be either the object instance\r
 117                 // or the id of the object (when what is found in the stream is an object reference).\r
 118                 // If an object instance is read, the objectId is set to 0.\r
 119                 \r
 120                 private void ReadObject (BinaryElement element, BinaryReader reader, out long objectId, out object value, out SerializationInfo info)\r
 121                 {\r
 122                         switch (element)\r
 123                         {\r
 124                                 case BinaryElement.RefTypeObject:\r
 125                                         ReadRefTypeObjectInstance (reader, out objectId, out value, out info);\r
 126                                         break;\r
 127 \r
 128                                 case BinaryElement.RuntimeObject:\r
 129                                         ReadObjectInstance (reader, true, out objectId, out value, out info);\r
 130                                         break;\r
 131 \r
 132                                 case BinaryElement.ExternalObject:\r
 133                                         ReadObjectInstance (reader, false, out objectId, out value, out info);\r
 134                                         break;\r
 135 \r
 136                                 case BinaryElement.String:\r
 137                                         info = null;\r
 138                                         ReadStringIntance (reader, out objectId, out value);\r
 139                                         break;\r
 140 \r
 141                                 case BinaryElement.GenericArray:\r
 142                                         info = null;\r
 143                                         ReadGenericArray (reader, out objectId, out value);\r
 144                                         break;\r
 145 \r
 146 \r
 147                                 case BinaryElement.BoxedPrimitiveTypeValue:\r
 148                                         value = ReadBoxedPrimitiveTypeValue (reader);\r
 149                                         objectId = 0;\r
 150                                         info = null;\r
 151                                         break;\r
 152 \r
 153                                 case BinaryElement.NullValue:\r
 154                                         value = null;\r
 155                                         objectId = 0;\r
 156                                         info = null;\r
 157                                         break;\r
 158 \r
 159                                 case BinaryElement.Assembly:\r
 160                                         ReadAssembly (reader);\r
 161                                         ReadObject ((BinaryElement)reader.ReadByte (), reader, out objectId, out value, out info);\r
 162                                         break;\r
 163 \r
 164                                 case BinaryElement.ArrayFiller8b:\r
 165                                         value = new ArrayNullFiller(reader.ReadByte());\r
 166                                         objectId = 0;\r
 167                                         info = null;\r
 168                                         break;\r
 169 \r
 170                                 case BinaryElement.ArrayFiller32b:\r
 171                                         value = new ArrayNullFiller(reader.ReadInt32());\r
 172                                         objectId = 0;\r
 173                                         info = null;\r
 174                                         break;\r
 175 \r
 176                                 case BinaryElement.ArrayOfPrimitiveType:\r
 177                                         ReadArrayOfPrimitiveType (reader, out objectId, out value);\r
 178                                         info = null;\r
 179                                         break;\r
 180 \r
 181                                 case BinaryElement.ArrayOfObject:\r
 182                                         ReadArrayOfObject (reader, out objectId, out value);\r
 183                                         info = null;\r
 184                                         break;\r
 185 \r
 186                                 case BinaryElement.ArrayOfString:\r
 187                                         ReadArrayOfString (reader, out objectId, out value);\r
 188                                         info = null;\r
 189                                         break;\r
 190 \r
 191                                 default:\r
 192                                         throw new SerializationException ("Unexpected binary element: " + (int)element);\r
 193                         }\r
 194                 }\r
 195 \r
 196                 private void ReadAssembly (BinaryReader reader)\r
 197                 {\r
 198                         long id = (long) reader.ReadUInt32 ();\r
 199                         string assemblyName = reader.ReadString ();\r
 200                         _registeredAssemblies [id] = assemblyName;\r
 201                 }\r
 202 \r
 203                 private void ReadObjectInstance (BinaryReader reader, bool isRuntimeObject, out long objectId, out object value, out SerializationInfo info)\r
 204                 {\r
 205                         objectId = (long) reader.ReadUInt32 ();\r
 206 \r
 207                         TypeMetadata metadata = ReadTypeMetadata (reader, isRuntimeObject);\r
 208                         ReadObjectContent (reader, metadata, objectId, out value, out info);\r
 209                 }\r
 210 \r
 211                 private void ReadRefTypeObjectInstance (BinaryReader reader, out long objectId, out object value, out SerializationInfo info)\r
 212                 {\r
 213                         objectId = (long) reader.ReadUInt32 ();\r
 214                         long refTypeObjectId = (long) reader.ReadUInt32 ();\r
 215 \r
 216                         // Gets the type of the referred object and its metadata\r
 217 \r
 218                         object refObj = _manager.GetObject (refTypeObjectId);\r
 219                         if (refObj == null) throw new SerializationException ("Invalid binary format");\r
 220                         TypeMetadata metadata = (TypeMetadata)_typeMetadataCache [refObj.GetType()];\r
 221 \r
 222                         ReadObjectContent (reader, metadata, objectId, out value, out info);\r
 223                 }\r
 224 \r
 225                 private void ReadObjectContent (BinaryReader reader, TypeMetadata metadata, long objectId, out object objectInstance, out SerializationInfo info)\r
 226                 {\r
 227 #if NET_1_1\r
 228                         if (_filterLevel == TypeFilterLevel.Low)\r
 229                                 objectInstance = FormatterServices.GetSafeUninitializedObject (metadata.Type);\r
 230                         else\r
 231 #endif\r
 232                                 objectInstance = FormatterServices.GetUninitializedObject (metadata.Type);\r
 233                                 \r
 234                         info = metadata.NeedsSerializationInfo ? new SerializationInfo(metadata.Type, new FormatterConverter()) : null;\r
 235 \r
 236                         if (metadata.MemberNames != null)\r
 237                                 for (int n=0; n<metadata.FieldCount; n++)\r
 238                                         ReadValue (reader, objectInstance, objectId, info, metadata.MemberTypes[n], metadata.MemberNames[n], null, null);\r
 239                         else\r
 240                                 for (int n=0; n<metadata.FieldCount; n++)\r
 241                                         ReadValue (reader, objectInstance, objectId, info, metadata.MemberTypes[n], metadata.MemberInfos[n].Name, metadata.MemberInfos[n], null);\r
 242                 }\r
 243 \r
 244                 private void RegisterObject (long objectId, object objectInstance, SerializationInfo info, long parentObjectId, MemberInfo parentObjectMemeber, int[] indices)\r
 245                 {\r
 246                         if (parentObjectId == 0) indices = null;\r
 247 \r
 248                         if (!objectInstance.GetType().IsValueType || parentObjectId == 0)\r
 249                                 _manager.RegisterObject (objectInstance, objectId, info, 0, null, null);\r
 250                         else\r
 251                         {\r
 252                                 if (indices != null) indices = (int[])indices.Clone();\r
 253                                 _manager.RegisterObject (objectInstance, objectId, info, parentObjectId, parentObjectMemeber, indices);\r
 254                         }\r
 255                 }\r
 256 \r
 257                 private void ReadStringIntance (BinaryReader reader, out long objectId, out object value)\r
 258                 {\r
 259                         objectId = (long) reader.ReadUInt32 ();\r
 260                         value = reader.ReadString ();\r
 261                 }\r
 262 \r
 263                 private void ReadGenericArray (BinaryReader reader, out long objectId, out object val)\r
 264                 {\r
 265                         objectId = (long) reader.ReadUInt32 ();\r
 266                         ArrayStructure structure = (ArrayStructure) reader.ReadByte();\r
 267 \r
 268                         int rank = reader.ReadInt32();\r
 269 \r
 270                         bool emptyDim = false;\r
 271                         int[] lengths = new int[rank];\r
 272                         for (int n=0; n<rank; n++)\r
 273                         {\r
 274                                 lengths[n] = reader.ReadInt32();\r
 275                                 if (lengths[n] == 0) emptyDim = true;\r
 276                         }\r
 277 \r
 278                         TypeTag code = (TypeTag) reader.ReadByte ();\r
 279                         Type elementType = ReadType (reader, code);\r
 280 \r
 281                         Array array = Array.CreateInstance (elementType, lengths);\r
 282 \r
 283                         if (emptyDim) \r
 284                         { \r
 285                                 val = array;\r
 286                                 return;\r
 287                         }\r
 288 \r
 289                         int[] indices = new int[rank];\r
 290 \r
 291                         // Initialize indexes\r
 292                         for (int dim = rank-1; dim >= 0; dim--)\r
 293                                 indices[dim] = array.GetLowerBound (dim);\r
 294 \r
 295                         bool end = false;\r
 296                         while (!end)\r
 297                         {\r
 298                                 ReadValue (reader, array, objectId, null, elementType, null, null, indices);\r
 299 \r
 300                                 for (int dim = array.Rank-1; dim >= 0; dim--)\r
 301                                 {\r
 302                                         indices[dim]++;\r
 303                                         if (indices[dim] > array.GetUpperBound (dim))\r
 304                                         {\r
 305                                                 if (dim > 0) \r
 306                                                 {\r
 307                                                         indices[dim] = array.GetLowerBound (dim);\r
 308                                                         continue;       // Increment the next dimension's index\r
 309                                                 }\r
 310                                                 end = true;     // That was the last dimension. Finished.\r
 311                                         }\r
 312                                         break;\r
 313                                 }\r
 314                         }\r
 315                         val = array;\r
 316                 }\r
 317 \r
 318                 private object ReadBoxedPrimitiveTypeValue (BinaryReader reader)\r
 319                 {\r
 320                         Type type = ReadType (reader, TypeTag.PrimitiveType);\r
 321                         return ReadPrimitiveTypeValue (reader, type);\r
 322                 }\r
 323 \r
 324                 private void ReadArrayOfPrimitiveType (BinaryReader reader, out long objectId, out object val)\r
 325                 {\r
 326                         objectId = (long) reader.ReadUInt32 ();\r
 327                         int length = reader.ReadInt32 ();\r
 328                         Type elementType = ReadType (reader, TypeTag.PrimitiveType);\r
 329 \r
 330                         Array array = Array.CreateInstance (elementType, length);\r
 331                         for (int n = 0; n < length; n++)\r
 332                                 array.SetValue (ReadPrimitiveTypeValue (reader, elementType), n);\r
 333 \r
 334                         val = array;\r
 335                 }\r
 336 \r
 337                 private void ReadArrayOfObject (BinaryReader reader, out long objectId, out object array)\r
 338                 {\r
 339                         ReadSimpleArray (reader, typeof (object), out objectId, out array);\r
 340                 }\r
 341                 \r
 342                 private void ReadArrayOfString (BinaryReader reader, out long objectId, out object array)\r
 343                 {\r
 344                         ReadSimpleArray (reader, typeof (string), out objectId, out array);\r
 345                 }\r
 346 \r
 347                 private void ReadSimpleArray (BinaryReader reader, Type elementType, out long objectId, out object val)\r
 348                 {\r
 349                         objectId = (long) reader.ReadUInt32 ();\r
 350                         int length = reader.ReadInt32 ();\r
 351                         int[] indices = new int[1];\r
 352 \r
 353                         Array array = Array.CreateInstance (elementType, length);\r
 354                         for (int n = 0; n < length; n++)\r
 355                         {\r
 356                                 indices[0] = n;\r
 357                                 ReadValue (reader, array, objectId, null, elementType, null, null, indices);\r
 358                                 n = indices[0];\r
 359                         }\r
 360                         val = array;\r
 361                 }\r
 362 \r
 363                 private TypeMetadata ReadTypeMetadata (BinaryReader reader, bool isRuntimeObject)\r
 364                 {\r
 365                         TypeMetadata metadata = new TypeMetadata();\r
 366 \r
 367                         string className = reader.ReadString ();\r
 368                         int fieldCount = reader.ReadInt32 ();\r
 369 \r
 370                         Type[] types = new Type[fieldCount];\r
 371                         string[] names = new string[fieldCount];\r
 372 \r
 373                         TypeTag[] codes = new TypeTag[fieldCount];\r
 374 \r
 375                         for (int n=0; n<fieldCount; n++)\r
 376                                 names [n] = reader.ReadString ();\r
 377 \r
 378                         for (int n=0; n<fieldCount; n++)\r
 379                                 codes [n] = (TypeTag) reader.ReadByte ();\r
 380 \r
 381                         for (int n=0; n<fieldCount; n++)\r
 382                                 types [n] = ReadType (reader, codes[n]);\r
 383 \r
 384                         // Gets the type\r
 385 \r
 386                         if (!isRuntimeObject) \r
 387                         {\r
 388                                 long assemblyId = (long)reader.ReadUInt32();\r
 389                                 metadata.Type = GetDeserializationType (assemblyId, className);\r
 390                         }\r
 391                         else\r
 392                                 metadata.Type = Type.GetType (className, true);\r
 393 \r
 394                         metadata.MemberTypes = types;\r
 395                         metadata.MemberNames = names;\r
 396                         metadata.FieldCount = names.Length;\r
 397 \r
 398                         // Now check if this objects needs a SerializationInfo struct for deserialziation.\r
 399                         // SerializationInfo is needed if the object has to be deserialized using\r
 400                         // a serialization surrogate, or if it implements ISerializable.\r
 401 \r
 402                         if (_surrogateSelector != null)\r
 403                         {\r
 404                                 // check if the surrogate selector handles objects of the given type. \r
 405                                 ISurrogateSelector selector;\r
 406                                 ISerializationSurrogate surrogate = _surrogateSelector.GetSurrogate (metadata.Type, _context, out selector);\r
 407                                 metadata.NeedsSerializationInfo = (surrogate != null);\r
 408                         }\r
 409 \r
 410                         if (!metadata.NeedsSerializationInfo)\r
 411                         {\r
 412                                 // Check if the object is marked with the Serializable attribute\r
 413 \r
 414                                 if (!metadata.Type.IsSerializable)\r
 415                                         throw new SerializationException("Serializable objects must be marked with the Serializable attribute");\r
 416 \r
 417                                 metadata.NeedsSerializationInfo = (metadata.Type.GetInterface ("ISerializable") != null);\r
 418                                 if (!metadata.NeedsSerializationInfo)\r
 419                                 {\r
 420                                         metadata.MemberInfos = new MemberInfo [fieldCount];\r
 421                                         for (int n=0; n<fieldCount; n++)\r
 422                                         {\r
 423                                                 MemberInfo[] members = metadata.Type.GetMember (names[n], MemberTypes.Field | MemberTypes.Property, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);\r
 424                                                 if (members.Length > 1) throw new SerializationException ("There are two public members named \"" + names[n] + "\" in the class hirearchy of " + metadata.Type.FullName);\r
 425                                                 if (members.Length == 0) throw new SerializationException ("Field \"" + names[n] + "\" not found in class " + metadata.Type.FullName);\r
 426                                                 metadata.MemberInfos [n] = members[0];\r
 427                                         }\r
 428                                         metadata.MemberNames = null;    // Info now in MemberInfos\r
 429                                 }\r
 430                         }\r
 431 \r
 432                         // Registers the type's metadata so it can be reused later if\r
 433                         // a RefTypeObject element is found\r
 434 \r
 435                         if (!_typeMetadataCache.ContainsKey (metadata.Type))\r
 436                                 _typeMetadataCache [metadata.Type] = metadata;\r
 437 \r
 438                         return metadata;\r
 439                 }\r
 440 \r
 441 \r
 442                 private void ReadValue (BinaryReader reader, object parentObject, long parentObjectId, SerializationInfo info, Type valueType, string fieldName, MemberInfo memberInfo, int[] indices)\r
 443                 {\r
 444                         // Reads a value from the stream and assigns it to the member of an object\r
 445 \r
 446                         object val;\r
 447 \r
 448                         if (BinaryCommon.IsPrimitive (valueType))\r
 449                         {\r
 450                                 val = ReadPrimitiveTypeValue (reader, valueType);\r
 451                                 SetObjectValue (parentObject, fieldName, memberInfo, info, val, valueType, indices);\r
 452                                 return;\r
 453                         }\r
 454 \r
 455                         // Gets the object\r
 456 \r
 457                         BinaryElement element = (BinaryElement)reader.ReadByte ();\r
 458 \r
 459                         if (element == BinaryElement.ObjectReference)\r
 460                         {\r
 461                                 // Just read the id of the referred object and record a fixup\r
 462                                 long childObjectId = (long) reader.ReadUInt32();\r
 463                                 RecordFixup (parentObjectId, childObjectId, parentObject, info, fieldName, memberInfo, indices);\r
 464                                 return;\r
 465                         }\r
 466 \r
 467                         long objectId;\r
 468                         SerializationInfo objectInfo;\r
 469 \r
 470                         ReadObject (element, reader, out objectId, out val, out objectInfo);\r
 471 \r
 472                         // There are two cases where the object cannot be assigned to the parent\r
 473                         // and a fixup must be used:\r
 474                         //  1) When what has been read is not an object, but an id of an object that\r
 475                         //     has not been read yet (an object reference). This is managed in the\r
 476                         //     previous block of code.\r
 477                         //  2) When the read object is a value type object. Value type fields hold\r
 478                         //     copies of objects, not references. Thus, if the value object that\r
 479                         //     has been read has pending fixups, those fixups would be made to the\r
 480                         //     boxed copy in the ObjectManager, and not in the required object instance\r
 481 \r
 482                         // First of all register the fixup, and then the object. ObjectManager is more\r
 483                         // efficient if done in this order\r
 484 \r
 485                         bool hasFixup = false;\r
 486                         if (objectId != 0)\r
 487                         {\r
 488                                 if (val.GetType().IsValueType)\r
 489                                 {\r
 490                                         RecordFixup (parentObjectId, objectId, parentObject, info, fieldName, memberInfo, indices);\r
 491                                         hasFixup = true;\r
 492                                 }\r
 493 \r
 494                                 // Register the value\r
 495 \r
 496                                 if (info == null && !(parentObject is Array))\r
 497                                         RegisterObject (objectId, val, objectInfo, parentObjectId, memberInfo, null);\r
 498                                 else\r
 499                                         RegisterObject (objectId, val, objectInfo, parentObjectId, null, indices);\r
 500                         }\r
 501                         // Assign the value to the parent object, unless there is a fixup\r
 502                         \r
 503                         if (!hasFixup) \r
 504                                 SetObjectValue (parentObject, fieldName, memberInfo, info, val, valueType, indices);\r
 505                 }\r
 506 \r
 507                 private void SetObjectValue (object parentObject, string fieldName, MemberInfo memberInfo, SerializationInfo info, object value, Type valueType, int[] indices)\r
 508                 {\r
 509                         if (value is IObjectReference)\r
 510                                 value = ((IObjectReference)value).GetRealObject (_context);\r
 511 \r
 512                         if (parentObject is Array) \r
 513                         {\r
 514                                 if (value is ArrayNullFiller) \r
 515                                 {\r
 516                                         // It must be a single dimension array of objects.\r
 517                                         // Just increase the index. Elements are null by default.\r
 518                                         int count = ((ArrayNullFiller)value).NullCount;\r
 519                                         indices[0] += count - 1;\r
 520                                 }\r
 521                                 else\r
 522                                         ((Array)parentObject).SetValue (value, indices);\r
 523                         }\r
 524                         else if (info != null) {\r
 525                                 info.AddValue (fieldName, value, valueType);\r
 526                         }\r
 527                         else {\r
 528                                 if (memberInfo is FieldInfo)\r
 529                                         ((FieldInfo)memberInfo).SetValue (parentObject, value);\r
 530                                 else\r
 531                                         ((PropertyInfo)memberInfo).SetValue (parentObject, value, null);\r
 532                         }\r
 533                 }\r
 534 \r
 535                 private void RecordFixup (long parentObjectId, long childObjectId, object parentObject, SerializationInfo info, string fieldName, MemberInfo memberInfo, int[] indices)\r
 536                 {\r
 537                         if (info != null) {\r
 538                                 _manager.RecordDelayedFixup (parentObjectId, fieldName, childObjectId);\r
 539                         }\r
 540                         else if (parentObject is Array) {\r
 541                                 if (indices.Length == 1)\r
 542                                         _manager.RecordArrayElementFixup (parentObjectId, indices[0], childObjectId);\r
 543                                 else\r
 544                                         _manager.RecordArrayElementFixup (parentObjectId, (int[])indices.Clone(), childObjectId);\r
 545                         }\r
 546                         else {\r
 547                                 _manager.RecordFixup (parentObjectId, memberInfo, childObjectId);\r
 548                         }\r
 549                 }\r
 550 \r
 551                 private Type GetDeserializationType (long assemblyId, string className)\r
 552                 {\r
 553                         string assemblyName = (string)_registeredAssemblies[assemblyId];\r
 554 \r
 555                         if (_binder == null)\r
 556                         {\r
 557                                 Assembly assembly = Assembly.Load (assemblyName);\r
 558                                 return assembly.GetType (className, true);\r
 559                         }\r
 560                         else\r
 561                                 return _binder.BindToType (assemblyName, className);\r
 562                 }\r
 563 \r
 564                 public Type ReadType (BinaryReader reader, TypeTag code)\r
 565                 {\r
 566                         switch (code)\r
 567                         {\r
 568                                 case TypeTag.PrimitiveType:\r
 569                                         return BinaryCommon.GetTypeFromCode (reader.ReadByte());\r
 570 \r
 571                                 case TypeTag.String:\r
 572                                         return typeof(string);\r
 573 \r
 574                                 case TypeTag.ObjectType:\r
 575                                         return typeof(object);\r
 576 \r
 577                                 case TypeTag.RuntimeType:\r
 578                                 {\r
 579                                         string name = reader.ReadString ();\r
 580                                         return Type.GetType (name, true);\r
 581                                 }\r
 582 \r
 583                                 case TypeTag.GenericType:\r
 584                                 {\r
 585                                         string name = reader.ReadString ();\r
 586                                         long asmid = (long) reader.ReadUInt32();\r
 587                                         return GetDeserializationType (asmid, name);\r
 588                                 }\r
 589 \r
 590                                 case TypeTag.ArrayOfObject:\r
 591                                         return typeof(object[]);\r
 592 \r
 593                                 case TypeTag.ArrayOfString:\r
 594                                         return typeof(string[]);\r
 595 \r
 596                                 case TypeTag.ArrayOfPrimitiveType:\r
 597                                         Type elementType = BinaryCommon.GetTypeFromCode (reader.ReadByte());\r
 598                                         return Type.GetType(elementType.FullName + "[]");\r
 599 \r
 600                                 default:\r
 601                                         throw new NotSupportedException ("Unknow type tag");\r
 602                         }\r
 603                 }\r
 604                 \r
 605                 public static object ReadPrimitiveTypeValue (BinaryReader reader, Type type)\r
 606                 {\r
 607                         if (type == null) return null;\r
 608 \r
 609                         switch (Type.GetTypeCode (type))\r
 610                         {\r
 611                                 case TypeCode.Boolean:\r
 612                                         return reader.ReadBoolean();\r
 613 \r
 614                                 case TypeCode.Byte:\r
 615                                         return reader.ReadByte();\r
 616 \r
 617                                 case TypeCode.Char:\r
 618                                         return reader.ReadChar();\r
 619 \r
 620                                 case TypeCode.DateTime: \r
 621                                         return new DateTime (reader.ReadInt64());\r
 622 \r
 623                                 case TypeCode.Decimal:\r
 624                                         return reader.ReadDecimal();\r
 625 \r
 626                                 case TypeCode.Double:\r
 627                                         return reader.ReadDouble();\r
 628 \r
 629                                 case TypeCode.Int16:\r
 630                                         return reader.ReadInt16();\r
 631 \r
 632                                 case TypeCode.Int32:\r
 633                                         return reader.ReadInt32();\r
 634 \r
 635                                 case TypeCode.Int64:\r
 636                                         return reader.ReadInt64();\r
 637 \r
 638                                 case TypeCode.SByte:\r
 639                                         return reader.ReadSByte();\r
 640 \r
 641                                 case TypeCode.Single:\r
 642                                         return reader.ReadSingle();\r
 643 \r
 644                                 case TypeCode.UInt16:\r
 645                                         return reader.ReadUInt16();\r
 646 \r
 647                                 case TypeCode.UInt32:\r
 648                                         return reader.ReadUInt32();\r
 649 \r
 650                                 case TypeCode.UInt64:\r
 651                                         return reader.ReadUInt64();\r
 652 \r
 653                                 case TypeCode.String:\r
 654                                         return reader.ReadString();\r
 655 \r
 656                                 default:\r
 657                                         if (type == typeof(TimeSpan))\r
 658                                                 return new TimeSpan (reader.ReadInt64 ());\r
 659                                         else\r
 660                                                 throw new NotSupportedException ("Unsupported primitive type: " + type.FullName);\r
 661                         }\r
 662                 }\r
 663         }\r
 664 }