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

   1 // ObjectWriter.cs\r
   2 //\r
   3 // Author:\r
   4 //   Lluis Sanchez Gual (lluis@ideary.com)\r
   5 //\r
   6 // (C) 2003 Lluis Sanchez Gual\r
   7 \r
   8 using System;\r
   9 using System.IO;\r
  10 using System.Collections;\r
  11 using System.Runtime.Serialization;\r
  12 using System.Runtime.Remoting.Messaging;\r
  13 using System.Reflection;\r
  14 using System.Globalization;\r
  15 \r
  16 namespace System.Runtime.Serialization.Formatters.Binary\r
  17 {\r
  18         abstract class TypeMetadata\r
  19         {\r
  20                 public TypeMetadata (Type instanceType)\r
  21                 {\r
  22                         InstanceType = instanceType;\r
  23                         TypeAssembly = instanceType.Assembly;\r
  24                 }\r
  25                 \r
  26                 public Assembly TypeAssembly;\r
  27                 public Type InstanceType;\r
  28                 \r
  29                 public abstract void WriteAssemblies (ObjectWriter ow, BinaryWriter writer);\r
  30                 public abstract void WriteTypeData (ObjectWriter ow, BinaryWriter writer);\r
  31                 public abstract void WriteObjectData (ObjectWriter ow, BinaryWriter writer, object data);\r
  32                 \r
  33                 public virtual bool IsCompatible (TypeMetadata other)\r
  34                 {\r
  35                         return true;\r
  36                 }\r
  37         }\r
  38         \r
  39         class SerializableTypeMetadata: TypeMetadata\r
  40         {\r
  41                 Type[] types;\r
  42                 string[] names;\r
  43                 \r
  44                 public SerializableTypeMetadata (Type itype, SerializationInfo info): base (itype)\r
  45                 {\r
  46                         types = new Type [info.MemberCount];\r
  47                         names = new string [info.MemberCount];\r
  48 \r
  49                         SerializationInfoEnumerator e = info.GetEnumerator ();\r
  50 \r
  51                         int n = 0;\r
  52                         while (e.MoveNext ())\r
  53                         {\r
  54                                 types[n] = e.ObjectType;\r
  55                                 names[n] = e.Name;\r
  56                                 n++;\r
  57                         }\r
  58 \r
  59                         if (info.FullTypeName != InstanceType.FullName || info.AssemblyName != TypeAssembly.FullName) \r
  60                         {\r
  61                                 TypeAssembly = Assembly.Load (info.AssemblyName);\r
  62                                 InstanceType = TypeAssembly.GetType (info.FullTypeName);\r
  63                         }\r
  64                 }\r
  65                 \r
  66                 public override bool IsCompatible (TypeMetadata other)\r
  67                 {\r
  68                         if (!(other is SerializableTypeMetadata)) return false;\r
  69                         \r
  70                         SerializableTypeMetadata tm = (SerializableTypeMetadata)other;\r
  71                         if (types.Length != tm.types.Length) return false;\r
  72                         if (TypeAssembly != tm.TypeAssembly) return false;\r
  73                         if (InstanceType != tm.InstanceType) return false;\r
  74                         for (int n=0; n<types.Length; n++)\r
  75                         {\r
  76                                 if (types[n] != tm.types[n]) return false;\r
  77                                 if (names[n] != tm.names[n]) return false;\r
  78                         }\r
  79                         return true;\r
  80                 }\r
  81                 \r
  82                 public override void WriteAssemblies (ObjectWriter ow, BinaryWriter writer)\r
  83                 {\r
  84                         foreach (Type mtype in types)\r
  85                         {\r
  86                                 Type type = mtype;\r
  87                                 while (type.IsArray) \r
  88                                         type = type.GetElementType();\r
  89                                         \r
  90                                 ow.WriteAssembly (writer, type.Assembly);\r
  91                         }\r
  92                 }\r
  93                 \r
  94                 public override void WriteTypeData (ObjectWriter ow, BinaryWriter writer)\r
  95                 {\r
  96                         writer.Write (types.Length);\r
  97 \r
  98                         // Names of fields\r
  99                         foreach (string name in names)\r
 100                                 writer.Write (name);\r
 101 \r
 102                         // Types of fields\r
 103                         foreach (Type type in types)\r
 104                                 ObjectWriter.WriteTypeCode (writer, type);\r
 105 \r
 106                         // Type specs of fields\r
 107                         foreach (Type type in types)\r
 108                                 ow.WriteTypeSpec (writer, type);\r
 109                 }\r
 110                 \r
 111                 public override void WriteObjectData (ObjectWriter ow, BinaryWriter writer, object data)\r
 112                 {\r
 113                         SerializationInfo info = (SerializationInfo) data;\r
 114                         SerializationInfoEnumerator e = info.GetEnumerator ();\r
 115 \r
 116                         while (e.MoveNext ())\r
 117                                 ow.WriteValue (writer, e.ObjectType, e.Value);\r
 118                 }\r
 119         }\r
 120         \r
 121         class MemberTypeMetadata: TypeMetadata\r
 122         {\r
 123                 MemberInfo[] members;\r
 124                 \r
 125                 public MemberTypeMetadata (Type type, StreamingContext context): base (type)\r
 126                 {\r
 127                         members = FormatterServices.GetSerializableMembers (type, context);\r
 128                 }\r
 129 \r
 130                 public override void WriteAssemblies (ObjectWriter ow, BinaryWriter writer)\r
 131                 {\r
 132                         foreach (FieldInfo field in members)\r
 133                         {\r
 134                                 Type type = field.FieldType;\r
 135                                 while (type.IsArray) \r
 136                                         type = type.GetElementType();\r
 137                                         \r
 138                                 ow.WriteAssembly (writer, type.Assembly);\r
 139                         }\r
 140                 }\r
 141                 \r
 142                 public override void WriteTypeData (ObjectWriter ow, BinaryWriter writer)\r
 143                 {\r
 144                         writer.Write (members.Length);\r
 145 \r
 146                         // Names of fields\r
 147                         foreach (FieldInfo field in members) {\r
 148                                 if (field.DeclaringType == InstanceType)\r
 149                                         writer.Write (field.Name);\r
 150                                 else\r
 151                                         writer.Write (field.DeclaringType.Name + "+" + field.Name);\r
 152                         }\r
 153 \r
 154                         // Types of fields\r
 155                         foreach (FieldInfo field in members)\r
 156                                 ObjectWriter.WriteTypeCode (writer, field.FieldType);\r
 157 \r
 158                         // Type specs of fields\r
 159                         foreach (FieldInfo field in members)\r
 160                                 ow.WriteTypeSpec (writer, field.FieldType);\r
 161                 }\r
 162                 \r
 163                 public override void WriteObjectData (ObjectWriter ow, BinaryWriter writer, object data)\r
 164                 {\r
 165                         object[] values = FormatterServices.GetObjectData (data, members);\r
 166                         for (int n=0; n<values.Length; n++)\r
 167                                 ow.WriteValue (writer, ((FieldInfo)members[n]).FieldType, values[n]);\r
 168                 }\r
 169         }\r
 170         \r
 171         internal class ObjectWriter\r
 172         {\r
 173                 ObjectIDGenerator _idGenerator = new ObjectIDGenerator();\r
 174                 Hashtable _cachedMetadata = new Hashtable();\r
 175                 Queue _pendingObjects = new Queue();\r
 176                 Hashtable _assemblyCache = new Hashtable();\r
 177                 \r
 178                 // Type metadata that can be shared with all serializers\r
 179                 static Hashtable _cachedTypes = new Hashtable();\r
 180 \r
 181                 internal static Assembly CorlibAssembly = typeof(string).Assembly;\r
 182 \r
 183                 ISurrogateSelector _surrogateSelector;\r
 184                 StreamingContext _context;\r
 185                 FormatterAssemblyStyle _assemblyFormat;\r
 186                 \r
 187                 class MetadataReference\r
 188                 {\r
 189                         public TypeMetadata Metadata;\r
 190                         public long ObjectID;\r
 191                         \r
 192                         public MetadataReference (TypeMetadata metadata, long id)\r
 193                         {\r
 194                                 Metadata = metadata;\r
 195                                 ObjectID = id;\r
 196                         }\r
 197                 }\r
 198                 \r
 199                 public ObjectWriter (ISurrogateSelector surrogateSelector, StreamingContext context, FormatterAssemblyStyle assemblyFormat)\r
 200                 {\r
 201                         _surrogateSelector = surrogateSelector;\r
 202                         _context = context;\r
 203                         _assemblyFormat = assemblyFormat;\r
 204                 }\r
 205 \r
 206                 public void WriteObjectGraph (BinaryWriter writer, object obj, Header[] headers)\r
 207                 {\r
 208                         _pendingObjects.Clear();\r
 209                         if (headers != null) QueueObject (headers);\r
 210                         QueueObject (obj);\r
 211                         WriteQueuedObjects (writer);\r
 212                         WriteSerializationEnd (writer);\r
 213                 }\r
 214 \r
 215                 public void QueueObject (object obj)\r
 216                 {\r
 217                         _pendingObjects.Enqueue (obj);\r
 218                 }\r
 219 \r
 220                 public void WriteQueuedObjects (BinaryWriter writer)\r
 221                 {\r
 222 \r
 223                         while (_pendingObjects.Count > 0)\r
 224                                 WriteObjectInstance (writer, _pendingObjects.Dequeue(), false);\r
 225                 }\r
 226 \r
 227                 public void WriteObjectInstance (BinaryWriter writer, object obj, bool isValueObject)\r
 228                 {\r
 229                         bool firstTime;\r
 230                         long id;\r
 231 \r
 232                         // If the object is a value type (not boxed) then there is no need\r
 233                         // to register it in the id generator, because it won't have other\r
 234                         // references to it\r
 235 \r
 236                         if (isValueObject) id = _idGenerator.NextId;\r
 237                         else id = _idGenerator.GetId (obj, out firstTime);\r
 238 \r
 239                         if (obj is string) {\r
 240                                 WriteString (writer, id, (string)obj);\r
 241                         }\r
 242                         else if (obj is Array) {\r
 243                                 WriteArray (writer, id, (Array)obj);\r
 244                         }\r
 245                         else\r
 246                                 WriteObject (writer, id, obj);\r
 247                 }\r
 248 \r
 249                 public static void WriteSerializationEnd (BinaryWriter writer)\r
 250                 {\r
 251                         writer.Write ((byte) BinaryElement.End);\r
 252                 }\r
 253 \r
 254                 private void WriteObject (BinaryWriter writer, long id, object obj)\r
 255                 {\r
 256                         object data;\r
 257                         TypeMetadata metadata;\r
 258 \r
 259                         GetObjectData (obj, out metadata, out data);\r
 260                         MetadataReference metadataReference = (MetadataReference)_cachedMetadata [metadata.InstanceType];\r
 261 \r
 262                         if (metadataReference != null && metadata.IsCompatible (metadataReference.Metadata))\r
 263                         {\r
 264                                 // An object of the same type has already been serialized\r
 265                                 // It is not necessary to write again type metadata\r
 266 \r
 267                                 writer.Write ((byte) BinaryElement.RefTypeObject);\r
 268                                 writer.Write ((int)id);\r
 269 \r
 270                                 writer.Write ((int)metadataReference.ObjectID);\r
 271                                 metadata.WriteObjectData (this, writer, data);\r
 272                                 return;\r
 273                         }\r
 274 \r
 275                         if (metadataReference == null)\r
 276                         {\r
 277                                 metadataReference = new MetadataReference (metadata, id);\r
 278                                 _cachedMetadata [metadata.InstanceType] = metadataReference;\r
 279                         }\r
 280 \r
 281                         BinaryElement objectTag;\r
 282 \r
 283                         int assemblyId;\r
 284                         if (metadata.TypeAssembly == CorlibAssembly)\r
 285                         {\r
 286                                 // A corlib type\r
 287                                 objectTag = BinaryElement.RuntimeObject;\r
 288                                 assemblyId = -1;\r
 289                         }\r
 290                         else\r
 291                         {\r
 292                                 objectTag = BinaryElement.ExternalObject;\r
 293                                 assemblyId = WriteAssembly (writer, metadata.TypeAssembly);\r
 294                         }\r
 295 \r
 296                         // Registers the assemblies needed for each field\r
 297                         // If there are assemblies that where not registered before this object,\r
 298                         // write them now\r
 299 \r
 300                         metadata.WriteAssemblies (this, writer);\r
 301 \r
 302                         // Writes the object\r
 303 \r
 304                         writer.Write ((byte) objectTag);\r
 305                         writer.Write ((int)id);\r
 306                         writer.Write (metadata.InstanceType.FullName);\r
 307                         \r
 308                         metadata.WriteTypeData (this, writer);\r
 309                         if (assemblyId != -1) writer.Write (assemblyId);\r
 310                         \r
 311                         metadata.WriteObjectData (this, writer, data);\r
 312                 }\r
 313 \r
 314                 private void GetObjectData (object obj, out TypeMetadata metadata, out object data)\r
 315                 {\r
 316                         Type instanceType = obj.GetType();\r
 317 \r
 318                         // Check if the formatter has a surrogate selector \96 if it does, \r
 319                         // check if the surrogate selector handles objects of the given type. \r
 320 \r
 321                         if (_surrogateSelector != null)\r
 322                         {\r
 323                                 ISurrogateSelector selector;\r
 324                                 ISerializationSurrogate surrogate = _surrogateSelector.GetSurrogate (instanceType, _context, out selector);\r
 325                                 if (surrogate != null)\r
 326                                 {\r
 327                                         SerializationInfo info = new SerializationInfo (instanceType, new FormatterConverter ());\r
 328                                         surrogate.GetObjectData (obj, info, _context);\r
 329                                         metadata = new SerializableTypeMetadata (instanceType, info);\r
 330                                         data = info;\r
 331                                         return;\r
 332                                 }\r
 333                         }\r
 334 \r
 335                         // Check if the object is marked with the Serializable attribute\r
 336 \r
 337                         if (!instanceType.IsSerializable)\r
 338                                 throw new SerializationException ("Type " + instanceType +\r
 339                                                                   " is not marked as Serializable " + \r
 340                                                                   "and does not implement ISerializable.");\r
 341 \r
 342                         ISerializable ser = obj as ISerializable;\r
 343 \r
 344                         if (ser != null) \r
 345                         {\r
 346                                 SerializationInfo info = new SerializationInfo (instanceType, new FormatterConverter ());\r
 347                                 ser.GetObjectData (info, _context);\r
 348                                 metadata = new SerializableTypeMetadata (instanceType, info);\r
 349                                 data = info;\r
 350                         } \r
 351                         else \r
 352                         {\r
 353                                 data = obj;\r
 354                                 if (_context.Context != null)\r
 355                                 {\r
 356                                         // Don't cache metadata info when the Context property is not null sice\r
 357                                         // we can't control the number of possible contexts in this case\r
 358                                         metadata = new MemberTypeMetadata (instanceType, _context);\r
 359                                         return;\r
 360                                 }\r
 361                                 \r
 362                                 metadata = null;\r
 363                                 lock (_cachedTypes)\r
 364                                 {\r
 365                                         Hashtable typesTable = (Hashtable) _cachedTypes [_context.State];\r
 366                                         if (typesTable != null)\r
 367                                         {\r
 368                                                 metadata = (TypeMetadata) typesTable [instanceType];\r
 369                                                 if (metadata == null) \r
 370                                                 {\r
 371                                                         metadata = CreateMemberTypeMetadata (instanceType);\r
 372                                                         typesTable [instanceType] = metadata;\r
 373                                                 }\r
 374                                         }\r
 375                                         else\r
 376                                         {\r
 377                                                 metadata = CreateMemberTypeMetadata (instanceType);\r
 378                                                 typesTable = new Hashtable ();\r
 379                                                 typesTable [instanceType] = metadata;\r
 380                                                 _cachedTypes [_context.State] = typesTable;\r
 381                                         }\r
 382                                 }\r
 383                         }\r
 384                 }\r
 385                 \r
 386                 TypeMetadata CreateMemberTypeMetadata (Type type)\r
 387                 {\r
 388                         if (!BinaryCommon.UseReflectionSerialization) {\r
 389                                 Type metaType = CodeGenerator.GenerateMetadataType (type, _context);\r
 390                                 return (TypeMetadata) Activator.CreateInstance (metaType);\r
 391                         }\r
 392                         else\r
 393                                 return new MemberTypeMetadata (type, _context);\r
 394                 }\r
 395 \r
 396                 private void WriteArray (BinaryWriter writer, long id, Array array)\r
 397                 {\r
 398                         // There are 4 ways of serializing arrays:\r
 399                         // The element GenericArray (7) can be used for all arrays.\r
 400                         // The element ArrayOfPrimitiveType (15) can be used for single-dimensional\r
 401                         // arrays of primitive types\r
 402                         // The element ArrayOfObject (16) can be used for single-dimensional Object arrays\r
 403                         // The element ArrayOfString (17) can be used for single-dimensional string arrays\r
 404 \r
 405                         Type elementType = array.GetType().GetElementType();\r
 406 \r
 407                         if (elementType == typeof (object) && array.Rank == 1) {\r
 408                                 WriteObjectArray (writer, id, array);\r
 409                         }\r
 410                         else if (elementType == typeof (string) && array.Rank == 1) {\r
 411                                 WriteStringArray (writer, id, array);\r
 412                         }\r
 413                         else if (BinaryCommon.IsPrimitive(elementType) && array.Rank == 1) {\r
 414                                 WritePrimitiveTypeArray (writer, id, array);\r
 415                         }\r
 416                         else\r
 417                                 WriteGenericArray (writer, id, array);\r
 418                 }\r
 419 \r
 420                 private void WriteGenericArray (BinaryWriter writer, long id, Array array)\r
 421                 {\r
 422                         Type elementType = array.GetType().GetElementType();\r
 423 \r
 424                         // Registers and writes the assembly of the array element type if needed\r
 425 \r
 426                         if (!elementType.IsArray)\r
 427                                 WriteAssembly (writer, elementType.Assembly);\r
 428 \r
 429                         // Writes the array\r
 430 \r
 431                         writer.Write ((byte) BinaryElement.GenericArray);\r
 432                         writer.Write ((int)id);\r
 433                         \r
 434                         // Write the structure of the array\r
 435 \r
 436                         if (elementType.IsArray) \r
 437                                 writer.Write ((byte) ArrayStructure.Jagged);\r
 438                         else if (array.Rank == 1)\r
 439                                 writer.Write ((byte) ArrayStructure.SingleDimensional);\r
 440                         else\r
 441                                 writer.Write ((byte) ArrayStructure.MultiDimensional);\r
 442 \r
 443                         // Write the number of dimensions and the length\r
 444                         // of each dimension\r
 445 \r
 446                         writer.Write (array.Rank);\r
 447                         for (int n=0; n<array.Rank; n++)\r
 448                                 writer.Write (array.GetUpperBound (n) + 1);\r
 449 \r
 450                         // Writes the type\r
 451                         WriteTypeCode (writer, elementType);\r
 452                         WriteTypeSpec (writer, elementType);\r
 453 \r
 454                         // Writes the values. For single-dimension array, a special tag is used\r
 455                         // to represent multiple consecutive null values. I don't know why this\r
 456                         // optimization is not used for multidimensional arrays.\r
 457 \r
 458                         if (array.Rank == 1 && !elementType.IsValueType)\r
 459                         {\r
 460                                 WriteSingleDimensionArrayElements (writer, array, elementType);\r
 461                         }\r
 462                         else\r
 463                         {\r
 464                                 foreach (object item in array)\r
 465                                         WriteValue (writer, elementType, item);\r
 466                         }\r
 467                 }\r
 468 \r
 469                 private void WriteObjectArray (BinaryWriter writer, long id, Array array)\r
 470                 {\r
 471                         writer.Write ((byte) BinaryElement.ArrayOfObject);\r
 472                         writer.Write ((int)id);\r
 473                         writer.Write (array.Length);    // Single dimension. Just write the length\r
 474                         WriteSingleDimensionArrayElements (writer, array, typeof (object));\r
 475                 }\r
 476 \r
 477                 private void WriteStringArray (BinaryWriter writer, long id, Array array)\r
 478                 {\r
 479                         writer.Write ((byte) BinaryElement.ArrayOfString);\r
 480                         writer.Write ((int)id);\r
 481                         writer.Write (array.Length);    // Single dimension. Just write the length\r
 482                         WriteSingleDimensionArrayElements (writer, array, typeof (string));\r
 483                 }\r
 484 \r
 485                 private void WritePrimitiveTypeArray (BinaryWriter writer, long id, Array array)\r
 486                 {\r
 487                         writer.Write ((byte) BinaryElement.ArrayOfPrimitiveType);\r
 488                         writer.Write ((int)id);\r
 489                         writer.Write (array.Length);    // Single dimension. Just write the length\r
 490 \r
 491                         Type elementType = array.GetType().GetElementType();\r
 492                         WriteTypeSpec (writer, elementType);\r
 493 \r
 494                         switch (Type.GetTypeCode (elementType))\r
 495                         {\r
 496                                 case TypeCode.Boolean:\r
 497                                         foreach (bool item in (bool[]) array)\r
 498                                                 writer.Write (item);\r
 499                                         break;\r
 500 \r
 501                                 case TypeCode.Byte:\r
 502                                         writer.Write ((byte[]) array);\r
 503                                         break;\r
 504 \r
 505                                 case TypeCode.Char:\r
 506                                         foreach (char item in (char[]) array)\r
 507                                                 writer.Write (item);\r
 508                                         break;\r
 509 \r
 510                                 case TypeCode.DateTime: \r
 511                                         foreach (DateTime item in (DateTime[]) array)\r
 512                                                 writer.Write (item.Ticks);\r
 513                                         break;\r
 514 \r
 515                                 case TypeCode.Decimal:\r
 516                                         foreach (decimal item in (decimal[]) array)\r
 517                                                 writer.Write (item);\r
 518                                         break;\r
 519 \r
 520                                 case TypeCode.Double:\r
 521                                         foreach (double item in (double[]) array)\r
 522                                                 writer.Write (item);\r
 523                                         break;\r
 524 \r
 525                                 case TypeCode.Int16:\r
 526                                         foreach (short item in (short[]) array)\r
 527                                                 writer.Write (item);\r
 528                                         break;\r
 529 \r
 530                                 case TypeCode.Int32:\r
 531                                         foreach (int item in (int[]) array)\r
 532                                                 writer.Write (item);\r
 533                                         break;\r
 534 \r
 535                                 case TypeCode.Int64:\r
 536                                         foreach (long item in (long[]) array)\r
 537                                                 writer.Write (item);\r
 538                                         break;\r
 539 \r
 540                                 case TypeCode.SByte:\r
 541                                         foreach (sbyte item in (sbyte[]) array)\r
 542                                                 writer.Write (item);\r
 543                                         break;\r
 544 \r
 545                                 case TypeCode.Single:\r
 546                                         foreach (float item in (float[]) array)\r
 547                                                 writer.Write (item);\r
 548                                         break;\r
 549 \r
 550                                 case TypeCode.UInt16:\r
 551                                         foreach (ushort item in (ushort[]) array)\r
 552                                                 writer.Write (item);\r
 553                                         break;\r
 554 \r
 555                                 case TypeCode.UInt32:\r
 556                                         foreach (uint item in (uint[]) array)\r
 557                                                 writer.Write (item);\r
 558                                         break;\r
 559 \r
 560                                 case TypeCode.UInt64:\r
 561                                         foreach (ulong item in (ulong[]) array)\r
 562                                                 writer.Write (item);\r
 563                                         break;\r
 564 \r
 565                                 case TypeCode.String:\r
 566                                         foreach (string item in (string[]) array)\r
 567                                                 writer.Write (item);\r
 568                                         break;\r
 569 \r
 570                                 default:\r
 571                                         if (elementType == typeof (TimeSpan)) {\r
 572                                                 foreach (TimeSpan item in (TimeSpan[]) array)\r
 573                                                         writer.Write (item.Ticks);\r
 574                                         }\r
 575                                         else\r
 576                                                 throw new NotSupportedException ("Unsupported primitive type: " + elementType.FullName);\r
 577                                         break;\r
 578                         }                       \r
 579                 }\r
 580 \r
 581                 private void WriteSingleDimensionArrayElements (BinaryWriter writer, Array array, Type elementType)\r
 582                 {\r
 583                         int numNulls = 0;\r
 584                         foreach (object val in array)\r
 585                         {\r
 586                                 if (val != null && numNulls > 0)\r
 587                                 {\r
 588                                         WriteNullFiller (writer, numNulls);\r
 589                                         WriteValue (writer, elementType, val);\r
 590                                         numNulls = 0;\r
 591                                 }\r
 592                                 else if (val == null)\r
 593                                         numNulls++;\r
 594                                 else\r
 595                                         WriteValue (writer, elementType, val);\r
 596                         }\r
 597                         if (numNulls > 0)\r
 598                                 WriteNullFiller (writer, numNulls);\r
 599                 }\r
 600 \r
 601                 private void WriteNullFiller (BinaryWriter writer, int numNulls)\r
 602                 {\r
 603                         if (numNulls == 1) {\r
 604                                 writer.Write ((byte) BinaryElement.NullValue);\r
 605                         }\r
 606                         else if (numNulls == 2) {\r
 607                                 writer.Write ((byte) BinaryElement.NullValue);\r
 608                                 writer.Write ((byte) BinaryElement.NullValue);\r
 609                         }\r
 610                         else if (numNulls <= byte.MaxValue) {\r
 611                                 writer.Write ((byte) BinaryElement.ArrayFiller8b);\r
 612                                 writer.Write ((byte) numNulls);\r
 613                         }\r
 614                         else {\r
 615                                 writer.Write ((byte) BinaryElement.ArrayFiller32b);\r
 616                                 writer.Write (numNulls);\r
 617                         }\r
 618                 }\r
 619 \r
 620                 private void WriteObjectReference (BinaryWriter writer, long id)\r
 621                 {\r
 622 \r
 623                         writer.Write ((byte) BinaryElement.ObjectReference);\r
 624                         writer.Write ((int)id);\r
 625                 }\r
 626 \r
 627                 public void WriteValue (BinaryWriter writer, Type valueType, object val)\r
 628                 {\r
 629                         if (val == null) \r
 630                         {\r
 631                                 writer.Write ((byte) BinaryElement.NullValue);\r
 632                         }\r
 633                         else if (BinaryCommon.IsPrimitive(val.GetType()))\r
 634                         {\r
 635                                 if (!BinaryCommon.IsPrimitive(valueType))\r
 636                                 {\r
 637                                         // It is a boxed primitive type value\r
 638                                         writer.Write ((byte) BinaryElement.BoxedPrimitiveTypeValue);\r
 639                                         WriteTypeSpec (writer, val.GetType());\r
 640                                 }\r
 641                                 WritePrimitiveValue (writer, val);\r
 642                         }\r
 643                         else if (valueType.IsValueType)\r
 644                         {\r
 645                                 // Value types are written embedded in the containing object\r
 646                                 WriteObjectInstance (writer, val, true);\r
 647                         }\r
 648                         else if (val is string)\r
 649                         {\r
 650                                 // Strings are written embedded, unless already registered\r
 651                                 bool firstTime;\r
 652                                 long id = _idGenerator.GetId (val, out firstTime);\r
 653 \r
 654                                 if (firstTime) WriteObjectInstance (writer, val, false);\r
 655                                 else WriteObjectReference (writer, id);\r
 656                         }                       \r
 657                         else\r
 658                         {\r
 659                                 // It is a reference type. Write a forward reference and queue the\r
 660                                 // object to the pending object list (unless already written).\r
 661 \r
 662                                 bool firstTime;\r
 663                                 long id = _idGenerator.GetId (val, out firstTime);\r
 664 \r
 665                                 if (firstTime) _pendingObjects.Enqueue (val);\r
 666                                 WriteObjectReference (writer, id);\r
 667                         }\r
 668                 }\r
 669                 \r
 670                 private void WriteString (BinaryWriter writer, long id, string str)\r
 671                 {\r
 672                         writer.Write ((byte) BinaryElement.String);\r
 673                         writer.Write ((int)id);\r
 674                         writer.Write (str);\r
 675                 }\r
 676 \r
 677                 public int WriteAssembly (BinaryWriter writer, Assembly assembly)\r
 678                 {\r
 679                         if (assembly == ObjectWriter.CorlibAssembly) return -1;\r
 680                         \r
 681                         bool firstTime;\r
 682                         int id = RegisterAssembly (assembly, out firstTime);\r
 683                         if (!firstTime) return id;\r
 684                                         \r
 685                         writer.Write ((byte) BinaryElement.Assembly);\r
 686                         writer.Write (id);\r
 687                         if (_assemblyFormat == FormatterAssemblyStyle.Full)\r
 688                                 writer.Write (assembly.GetName ().FullName);\r
 689                         else\r
 690                                 writer.Write (assembly.GetName ().Name);\r
 691                                 \r
 692                         return id;\r
 693                 }\r
 694 \r
 695                 public int GetAssemblyId (Assembly assembly)\r
 696                 {\r
 697                         return (int)_assemblyCache[assembly];\r
 698                 }\r
 699 \r
 700                 private int RegisterAssembly (Assembly assembly, out bool firstTime)\r
 701                 {\r
 702                         if (_assemblyCache.ContainsKey (assembly))\r
 703                         {\r
 704                                 firstTime = false;\r
 705                                 return (int)_assemblyCache[assembly];\r
 706                         }\r
 707                         else\r
 708                         {\r
 709                                 int id = (int)_idGenerator.GetId (0, out firstTime);\r
 710                                 _assemblyCache.Add (assembly, id);\r
 711                                 return id;\r
 712                         }\r
 713                 }\r
 714 \r
 715                 public static void WritePrimitiveValue (BinaryWriter writer, object value)\r
 716                 {\r
 717                         Type type = value.GetType();\r
 718 \r
 719                         switch (Type.GetTypeCode (type))\r
 720                         {\r
 721                                 case TypeCode.Boolean:\r
 722                                         writer.Write ((bool)value);\r
 723                                         break;\r
 724 \r
 725                                 case TypeCode.Byte:\r
 726                                         writer.Write ((byte) value);\r
 727                                         break;\r
 728 \r
 729                                 case TypeCode.Char:\r
 730                                         writer.Write ((char) value);\r
 731                                         break;\r
 732 \r
 733                                 case TypeCode.DateTime: \r
 734                                         writer.Write ( ((DateTime)value).Ticks);\r
 735                                         break;\r
 736 \r
 737                                 case TypeCode.Decimal:\r
 738                                         writer.Write (((decimal) value).ToString (CultureInfo.InvariantCulture));\r
 739                                         break;\r
 740 \r
 741                                 case TypeCode.Double:\r
 742                                         writer.Write ((double) value);\r
 743                                         break;\r
 744 \r
 745                                 case TypeCode.Int16:\r
 746                                         writer.Write ((short) value);\r
 747                                         break;\r
 748 \r
 749                                 case TypeCode.Int32:\r
 750                                         writer.Write ((int) value);\r
 751                                         break;\r
 752 \r
 753                                 case TypeCode.Int64:\r
 754                                         writer.Write ((long) value);\r
 755                                         break;\r
 756 \r
 757                                 case TypeCode.SByte:\r
 758                                         writer.Write ((sbyte) value);\r
 759                                         break;\r
 760 \r
 761                                 case TypeCode.Single:\r
 762                                         writer.Write ((float) value);\r
 763                                         break;\r
 764 \r
 765                                 case TypeCode.UInt16:\r
 766                                         writer.Write ((ushort) value);\r
 767                                         break;\r
 768 \r
 769                                 case TypeCode.UInt32:\r
 770                                         writer.Write ((uint) value);\r
 771                                         break;\r
 772 \r
 773                                 case TypeCode.UInt64:\r
 774                                         writer.Write ((ulong) value);\r
 775                                         break;\r
 776 \r
 777                                 case TypeCode.String:\r
 778                                         writer.Write ((string) value);\r
 779                                         break;\r
 780 \r
 781                                 default:\r
 782                                         if (type == typeof (TimeSpan))\r
 783                                                 writer.Write (((TimeSpan)value).Ticks);\r
 784                                         else\r
 785                                                 throw new NotSupportedException ("Unsupported primitive type: " + value.GetType().FullName);\r
 786                                         break;\r
 787                         }\r
 788                 }\r
 789 \r
 790                 public static void WriteTypeCode (BinaryWriter writer, Type type)\r
 791                 {\r
 792                         writer.Write ((byte) GetTypeTag (type));\r
 793                 }\r
 794 \r
 795                 public static TypeTag GetTypeTag (Type type)\r
 796                 {\r
 797                         if (type == typeof (string)) {\r
 798                                 return TypeTag.String;\r
 799                         }\r
 800                         else if (BinaryCommon.IsPrimitive (type)) {\r
 801                                 return TypeTag.PrimitiveType;\r
 802                         }\r
 803                         else if (type == typeof (object)) {\r
 804                                 return TypeTag.ObjectType;\r
 805                         }\r
 806                         else if (type.IsArray && type.GetArrayRank() == 1 && type.GetElementType() == typeof (object)) {\r
 807                                 return TypeTag.ArrayOfObject; \r
 808                         }\r
 809                         else if (type.IsArray && type.GetArrayRank() == 1 && type.GetElementType() == typeof (string)){\r
 810                                 return TypeTag.ArrayOfString;\r
 811                         }\r
 812                         else if (type.IsArray && type.GetArrayRank() == 1 && BinaryCommon.IsPrimitive(type.GetElementType())) {\r
 813                                 return TypeTag.ArrayOfPrimitiveType;\r
 814                         }\r
 815                         else if (type.Assembly == CorlibAssembly) {\r
 816                                 return TypeTag.RuntimeType;\r
 817                         }\r
 818                         else\r
 819                                 return TypeTag.GenericType;\r
 820                 }\r
 821 \r
 822                 public void WriteTypeSpec (BinaryWriter writer, Type type)\r
 823                 {\r
 824                         // WARNING Keep in sync with EmitWriteTypeSpec\r
 825                         \r
 826                         switch (GetTypeTag (type))\r
 827                         {\r
 828                                 case TypeTag.PrimitiveType:\r
 829                                         writer.Write (BinaryCommon.GetTypeCode (type));\r
 830                                         break;\r
 831 \r
 832                                 case TypeTag.RuntimeType:\r
 833                                         writer.Write (type.FullName);\r
 834                                         break;\r
 835 \r
 836                                 case TypeTag.GenericType:\r
 837                                         writer.Write (type.FullName);\r
 838                                         writer.Write ((int)GetAssemblyId (type.Assembly));\r
 839                                         break;\r
 840 \r
 841                                 case TypeTag.ArrayOfPrimitiveType:\r
 842                                         writer.Write (BinaryCommon.GetTypeCode (type.GetElementType()));\r
 843                                         break;\r
 844 \r
 845                                 default:\r
 846                                         // Type spec not needed\r
 847                                         break;\r
 848                         }\r
 849                 }\r
 850         }\r
 851 }\r