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