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