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