class/System.XML/System.Xml.Serialization/XmlSerializationWriterInterpreter.cs

   1 //
   2 // XmlSerializationWriterInterpreter.cs:
   3 //
   4 // Author:
   5 //   Lluis Sanchez Gual (lluis@ximian.com)
   6 //
   7 // (C) 2002, 2003 Ximian, Inc.  http://www.ximian.com
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32 using System.Text;
  33 using System.Collections;
  34 using System.Reflection;
  35 using System.Xml.Schema;
  36
  37 namespace System.Xml.Serialization
  38 {
  39         internal class XmlSerializationWriterInterpreter: XmlSerializationWriter
  40         {
  41                 XmlMapping _typeMap;
  42                 SerializationFormat _format;
  43                 const string xmlNamespace = "http://www.w3.org/2000/xmlns/";
  44
  45                 public XmlSerializationWriterInterpreter (XmlMapping typeMap)
  46                 {
  47                         _typeMap = typeMap;
  48                         _format = typeMap.Format;
  49                 }
  50
  51                 protected override void InitCallbacks ()
  52                 {
  53                         ArrayList maps = _typeMap.RelatedMaps;
  54                         if (maps != null)
  55                         {
  56                                 foreach (XmlTypeMapping map in maps)  {
  57                                         CallbackInfo info = new CallbackInfo (this, map);
  58                                         if (map.TypeData.SchemaType == SchemaTypes.Enum) AddWriteCallback(map.TypeData.Type, map.XmlType, map.Namespace, new XmlSerializationWriteCallback (info.WriteEnum));
  59                                         else AddWriteCallback(map.TypeData.Type, map.XmlType, map.Namespace, new XmlSerializationWriteCallback (info.WriteObject));
  60                                 }
  61                         }
  62                 }
  63
  64                 public void WriteRoot (object ob)
  65                 {
  66                         WriteStartDocument ();
  67
  68                         if (_typeMap is XmlTypeMapping)
  69                         {
  70                                 XmlTypeMapping mp = (XmlTypeMapping) _typeMap;
  71                                 if (mp.TypeData.SchemaType == SchemaTypes.Class || mp.TypeData.SchemaType == SchemaTypes.Array)
  72                                         TopLevelElement ();
  73
  74                                 if (_format == SerializationFormat.Literal)
  75                                         WriteObject (mp, ob, mp.ElementName, mp.Namespace, true, false, true);
  76                                 else
  77                                         WritePotentiallyReferencingElement (mp.ElementName, mp.Namespace, ob, mp.TypeData.Type, true, false);
  78                         }
  79                         else if (ob is object[])
  80                                 WriteMessage ((XmlMembersMapping)_typeMap, (object[]) ob);
  81                         else
  82                                 throw CreateUnknownTypeException (ob);
  83
  84                         WriteReferencedElements ();
  85                 }
  86
  87                 protected XmlTypeMapping GetTypeMap (Type type)
  88                 {
  89                         ArrayList maps = _typeMap.RelatedMaps;
  90                         if (maps != null)
  91                         {
  92                                 foreach (XmlTypeMapping map in maps)
  93                                         if (map.TypeData.Type == type) return map;
  94                         }
  95                         throw new InvalidOperationException ("Type " + type + " not mapped");
  96                 }
  97
  98                 protected virtual void WriteObject (XmlTypeMapping typeMap, object ob, string element, string namesp, bool isNullable, bool needType, bool writeWrappingElem)
  99                 {
 100                         if (ob == null)
 101                         {
 102                                 if (isNullable)
 103                                 {
 104                                         if (_format == SerializationFormat.Literal) WriteNullTagLiteral(element, namesp);
 105                                         else WriteNullTagEncoded (element, namesp);
 106                                 }
 107                                 return;
 108                         }
 109
 110                         if (ob is XmlNode)
 111                         {
 112                                 if (_format == SerializationFormat.Literal) WriteElementLiteral((XmlNode)ob, "", "", true, false);
 113                                 else WriteElementEncoded((XmlNode)ob, "", "", true, false);
 114                                 return;
 115                         }
 116
 117                         if (typeMap.TypeData.SchemaType == SchemaTypes.XmlSerializable)
 118                         {
 119                                 WriteSerializable ((IXmlSerializable)ob, element, namesp, isNullable);
 120                                 return;
 121                         }
 122
 123                         XmlTypeMapping map = typeMap.GetRealTypeMap (ob.GetType());
 124
 125                         if (map == null)
 126                         {
 127                                 // bug #81539
 128                                 if (ob.GetType ().IsArray && typeof (XmlNode).IsAssignableFrom (ob.GetType ().GetElementType ())) {
 129                                         Writer.WriteStartElement (element, namesp);
 130                                         foreach (XmlNode node in (IEnumerable) ob)
 131                                                 node.WriteTo (Writer);
 132                                         Writer.WriteEndElement ();
 133                                 }
 134                                 else
 135                                         WriteTypedPrimitive (element, namesp, ob, true);
 136                                 return;
 137                         }
 138
 139                         if (writeWrappingElem)
 140                         {
 141                                 if (map != typeMap || _format == SerializationFormat.Encoded) needType = true;
 142                                 WriteStartElement (element, namesp, ob);
 143                         }
 144
 145                         if (needType)
 146                                 WriteXsiType(map.XmlType, map.XmlTypeNamespace);
 147
 148                         switch (map.TypeData.SchemaType)
 149                         {
 150                                 case SchemaTypes.Class: WriteObjectElement (map, ob, element, namesp); break;
 151                                 case SchemaTypes.Array: WriteListElement (map, ob, element, namesp); break;
 152                                 case SchemaTypes.Primitive: WritePrimitiveElement (map, ob, element, namesp); break;
 153                                 case SchemaTypes.Enum: WriteEnumElement (map, ob, element, namesp); break;
 154                         }
 155
 156                         if (writeWrappingElem)
 157                                 WriteEndElement (ob);
 158                 }
 159
 160                 protected virtual void WriteMessage (XmlMembersMapping membersMap, object[] parameters)
 161                 {
 162                         if (membersMap.HasWrapperElement) {
 163                                 TopLevelElement ();
 164                                 WriteStartElement(membersMap.ElementName, membersMap.Namespace, (_format == SerializationFormat.Encoded));
 165
 166                                 if (Writer.LookupPrefix (XmlSchema.Namespace) == null)
 167                                         WriteAttribute ("xmlns","xsd",XmlSchema.Namespace,XmlSchema.Namespace);
 168
 169                                 if (Writer.LookupPrefix (XmlSchema.InstanceNamespace) == null)
 170                                         WriteAttribute ("xmlns","xsi",XmlSchema.InstanceNamespace,XmlSchema.InstanceNamespace);
 171                         }
 172
 173                         WriteMembers ((ClassMap)membersMap.ObjectMap, parameters, true);
 174
 175                         if (membersMap.HasWrapperElement)
 176                                 WriteEndElement();
 177                 }
 178
 179                 protected virtual void WriteObjectElement (XmlTypeMapping typeMap, object ob, string element, string namesp)
 180                 {
 181                         ClassMap map = (ClassMap)typeMap.ObjectMap;
 182                         if (map.NamespaceDeclarations != null)
 183                                 WriteNamespaceDeclarations ((XmlSerializerNamespaces) map.NamespaceDeclarations.GetValue (ob));
 184
 185                         WriteObjectElementAttributes (typeMap, ob);
 186                         WriteObjectElementElements (typeMap, ob);
 187                 }
 188
 189                 protected virtual void WriteObjectElementAttributes (XmlTypeMapping typeMap, object ob)
 190                 {
 191                         ClassMap map = (ClassMap)typeMap.ObjectMap;
 192                         WriteAttributeMembers (map, ob, false);
 193                 }
 194
 195                 protected virtual void WriteObjectElementElements (XmlTypeMapping typeMap, object ob)
 196                 {
 197                         ClassMap map = (ClassMap)typeMap.ObjectMap;
 198                         WriteElementMembers (map, ob, false);
 199                 }
 200
 201                 void WriteMembers (ClassMap map, object ob, bool isValueList)
 202                 {
 203                         WriteAttributeMembers (map, ob, isValueList);
 204                         WriteElementMembers (map, ob, isValueList);
 205                 }
 206
 207                 void WriteAttributeMembers (ClassMap map, object ob, bool isValueList)
 208                 {
 209                         // Write attributes
 210
 211                         XmlTypeMapMember anyAttrMember = map.DefaultAnyAttributeMember;
 212                         if (anyAttrMember != null && MemberHasValue (anyAttrMember, ob, isValueList))
 213                         {
 214                                 ICollection extraAtts = (ICollection) GetMemberValue (anyAttrMember, ob, isValueList);
 215                                 if (extraAtts != null)
 216                                 {
 217                                         foreach (XmlAttribute attr in extraAtts)
 218                                                 if (attr.NamespaceURI != xmlNamespace)
 219                                                         WriteXmlAttribute (attr, ob);
 220                                 }
 221                         }
 222
 223                         ICollection attributes = map.AttributeMembers;
 224                         if (attributes != null)
 225                         {
 226                                 foreach (XmlTypeMapMemberAttribute attr in attributes) {
 227                                         if (MemberHasValue (attr, ob, isValueList))
 228                                                 WriteAttribute (attr.AttributeName, attr.Namespace, GetStringValue (attr.MappedType, attr.TypeData, GetMemberValue (attr, ob, isValueList)));
 229                                 }
 230                         }
 231                 }
 232
 233                 void WriteElementMembers (ClassMap map, object ob, bool isValueList)
 234                 {
 235                         ICollection members = map.ElementMembers;
 236                         if (members != null)
 237                         {
 238                                 foreach (XmlTypeMapMemberElement member in members)
 239                                 {
 240                                         if (!MemberHasValue (member, ob, isValueList)) continue;
 241                                         object memberValue = GetMemberValue (member, ob, isValueList);
 242                                         Type memType = member.GetType();
 243
 244                                         if (memType == typeof(XmlTypeMapMemberList))
 245                                         {
 246                                                 WriteMemberElement ((XmlTypeMapElementInfo) member.ElementInfo[0], memberValue);
 247                                         }
 248                                         else if (memType == typeof(XmlTypeMapMemberFlatList))
 249                                         {
 250                                                 if (memberValue != null)
 251                                                         WriteListContent (ob, member.TypeData, ((XmlTypeMapMemberFlatList)member).ListMap, memberValue, null);
 252                                         }
 253                                         else if (memType == typeof(XmlTypeMapMemberAnyElement))
 254                                         {
 255                                                 if (memberValue != null)
 256                                                         WriteAnyElementContent ((XmlTypeMapMemberAnyElement)member, memberValue);
 257                                         }
 258                                         else if (memType == typeof(XmlTypeMapMemberAnyAttribute))
 259                                         {
 260                                                 // Ignore
 261                                         }
 262                                         else if (memType == typeof(XmlTypeMapMemberElement))
 263                                         {
 264                                                 XmlTypeMapElementInfo elem = member.FindElement (ob, memberValue);
 265                                                 WriteMemberElement (elem, memberValue);
 266                                         }
 267                                         else
 268                                                 throw new InvalidOperationException ("Unknown member type");
 269                                 }
 270                         }
 271                 }
 272
 273                 object GetMemberValue (XmlTypeMapMember member, object ob, bool isValueList)
 274                 {
 275                         if (isValueList) return ((object[])ob)[member.GlobalIndex];
 276                         else return member.GetValue (ob);
 277                 }
 278
 279                 bool MemberHasValue (XmlTypeMapMember member, object ob, bool isValueList)
 280                 {
 281                         if (isValueList) {
 282                                 return member.GlobalIndex < ((object[])ob).Length;
 283                         }
 284                         else if (member.DefaultValue != System.DBNull.Value) {
 285                                 object val = GetMemberValue (member, ob, isValueList);
 286                                 if (val == null && member.DefaultValue == null) return false;
 287                                 if (val != null && val.GetType().IsEnum)
 288                                 {
 289                                         if (val.Equals (member.DefaultValue)) return false;
 290                                         Type t = Enum.GetUnderlyingType(val.GetType());
 291                                         val = Convert.ChangeType (val, t);
 292                                 }
 293                                 if (val != null && val.Equals (member.DefaultValue)) return false;
 294                         }
 295                         else if (member.IsOptionalValueType)
 296                                 return member.GetValueSpecified (ob);
 297
 298                         return true;
 299                 }
 300
 301                 void WriteMemberElement (XmlTypeMapElementInfo elem, object memberValue)
 302                 {
 303                         switch (elem.TypeData.SchemaType)
 304                         {
 305                                 case SchemaTypes.XmlNode:
 306                                         string elemName = elem.WrappedElement ? elem.ElementName : "";
 307                                         if (_format == SerializationFormat.Literal) WriteElementLiteral(((XmlNode)memberValue), elemName, elem.Namespace, elem.IsNullable, false);
 308                                         else WriteElementEncoded(((XmlNode)memberValue), elemName, elem.Namespace, elem.IsNullable, false);
 309                                         break;
 310
 311                                 case SchemaTypes.Enum:
 312                                 case SchemaTypes.Primitive:
 313                                         if (_format == SerializationFormat.Literal)
 314                                                 WritePrimitiveValueLiteral (memberValue, elem.ElementName, elem.Namespace, elem.MappedType, elem.TypeData, elem.WrappedElement, elem.IsNullable);
 315                                         else
 316                                                 WritePrimitiveValueEncoded (memberValue, elem.ElementName, elem.Namespace, new XmlQualifiedName (elem.DataTypeName, elem.DataTypeNamespace), elem.MappedType, elem.TypeData, elem.WrappedElement, elem.IsNullable);
 317                                         break;
 318
 319                                 case SchemaTypes.Array:
 320                                         if (memberValue == null) {
 321                                                 if (!elem.IsNullable) return;
 322                                                 if (_format == SerializationFormat.Literal) WriteNullTagLiteral (elem.ElementName, elem.Namespace);
 323                                                 else WriteNullTagEncoded (elem.ElementName, elem.Namespace);
 324                                         }
 325                                         else if (elem.MappedType.MultiReferenceType)
 326                                                 WriteReferencingElement (elem.ElementName, elem.Namespace, memberValue, elem.IsNullable);
 327                                         else {
 328                                                 WriteStartElement(elem.ElementName, elem.Namespace, memberValue);
 329                                                 WriteListContent (null, elem.TypeData, (ListMap) elem.MappedType.ObjectMap, memberValue, null);
 330                                                 WriteEndElement (memberValue);
 331                                         }
 332                                         break;
 333
 334                                 case SchemaTypes.Class:
 335                                         if (elem.MappedType.MultiReferenceType) {
 336                                                 if (elem.MappedType.TypeData.Type == typeof(object))
 337                                                         WritePotentiallyReferencingElement (elem.ElementName, elem.Namespace, memberValue, null, false, elem.IsNullable);
 338                                                 else
 339                                                         WriteReferencingElement (elem.ElementName, elem.Namespace, memberValue, elem.IsNullable);
 340                                         }
 341                                         else WriteObject (elem.MappedType, memberValue, elem.ElementName, elem.Namespace, elem.IsNullable, false, true);
 342                                         break;
 343
 344                                 case SchemaTypes.XmlSerializable:
 345                                         // bug #419973
 346                                         if (!elem.MappedType.TypeData.Type.IsInstanceOfType (memberValue))
 347                                                 memberValue = ImplicitConvert (memberValue, elem.MappedType.TypeData.Type);
 348                                         WriteSerializable ((IXmlSerializable) memberValue, elem.ElementName, elem.Namespace, elem.IsNullable);
 349                                         break;
 350
 351                                 default:
 352                                         throw new NotSupportedException ("Invalid value type");
 353                         }
 354                 }
 355
 356                 object ImplicitConvert (object obj, Type type)
 357                 {
 358                         if (obj == null)
 359                                 return null;
 360                         for (Type t = type; t != typeof (object); t = t.BaseType) {
 361                                 MethodInfo mi = t.GetMethod ("op_Implicit", new Type [] {t});
 362                                 if (mi != null && mi.ReturnType.IsAssignableFrom (obj.GetType ()))
 363                                         return mi.Invoke (null, new object [] {obj});
 364                         }
 365
 366                         for (Type t = obj.GetType (); t != typeof (object); t = t.BaseType) {
 367                                 MethodInfo mi = t.GetMethod ("op_Implicit", new Type [] {t});
 368                                 if (mi != null && mi.ReturnType == type)
 369                                         return mi.Invoke (null, new object [] {obj});
 370                         }
 371                         return obj;
 372                 }
 373
 374                 void WritePrimitiveValueLiteral (object memberValue, string name, string ns, XmlTypeMapping mappedType, TypeData typeData, bool wrapped, bool isNullable)
 375                 {
 376                         if (!wrapped) {
 377                                 WriteValue (GetStringValue (mappedType, typeData, memberValue));
 378                         }
 379                         else if (isNullable) {
 380                                 if (typeData.Type == typeof(XmlQualifiedName)) WriteNullableQualifiedNameLiteral (name, ns, (XmlQualifiedName)memberValue);
 381                                 else WriteNullableStringLiteral (name, ns, GetStringValue (mappedType, typeData, memberValue));
 382                         }
 383                         else {
 384                                 if (typeData.Type == typeof(XmlQualifiedName)) WriteElementQualifiedName (name, ns, (XmlQualifiedName)memberValue);
 385                                 else WriteElementString (name, ns, GetStringValue (mappedType, typeData, memberValue));
 386                         }
 387                 }
 388
 389                 void WritePrimitiveValueEncoded (object memberValue, string name, string ns, XmlQualifiedName xsiType, XmlTypeMapping mappedType, TypeData typeData, bool wrapped, bool isNullable)
 390                 {
 391                         if (!wrapped) {
 392                                 WriteValue (GetStringValue (mappedType, typeData, memberValue));
 393                         }
 394                         else if (isNullable) {
 395                                 if (typeData.Type == typeof(XmlQualifiedName)) WriteNullableQualifiedNameEncoded (name, ns, (XmlQualifiedName)memberValue, xsiType);
 396                                 else WriteNullableStringEncoded (name, ns, GetStringValue (mappedType, typeData, memberValue), xsiType);
 397                         }
 398                         else {
 399                                 if (typeData.Type == typeof(XmlQualifiedName)) WriteElementQualifiedName (name, ns, (XmlQualifiedName)memberValue, xsiType);
 400                                 else WriteElementString (name, ns, GetStringValue (mappedType, typeData, memberValue), xsiType);
 401                         }
 402                 }
 403
 404                 protected virtual void WriteListElement (XmlTypeMapping typeMap, object ob, string element, string namesp)
 405                 {
 406                         if (_format == SerializationFormat.Encoded)
 407                         {
 408                                 string n, ns;
 409                                 int itemCount = GetListCount (typeMap.TypeData, ob);
 410                                 ((ListMap) typeMap.ObjectMap).GetArrayType (itemCount, out n, out ns);
 411                                 string arrayType = (ns != string.Empty) ? FromXmlQualifiedName (new XmlQualifiedName(n,ns)) : n;
 412                                 WriteAttribute ("arrayType", XmlSerializer.EncodingNamespace, arrayType);
 413                         }
 414                         WriteListContent (null, typeMap.TypeData, (ListMap) typeMap.ObjectMap, ob, null);
 415                 }
 416
 417                 void WriteListContent (object container, TypeData listType, ListMap map, object ob, StringBuilder targetString)
 418                 {
 419                         if (listType.Type.IsArray)
 420                         {
 421                                 Array array = (Array)ob;
 422                                 for (int n=0; n<array.Length; n++)
 423                                 {
 424                                         object item = array.GetValue (n);
 425                                         XmlTypeMapElementInfo info = map.FindElement (container, n, item);
 426                                         if (info != null && targetString == null) WriteMemberElement (info, item);
 427                                         else if (info != null && targetString != null) targetString.Append (GetStringValue (info.MappedType, info.TypeData, item)).Append (" ");
 428                                         else if (item != null) throw CreateUnknownTypeException (item);
 429                                 }
 430                         }
 431                         else if (ob is ICollection)
 432                         {
 433                                 int count = (int) ob.GetType().GetProperty ("Count").GetValue(ob,null);
 434                                 PropertyInfo itemProp = TypeData.GetIndexerProperty (listType.Type);
 435                                 object[] index = new object[1];
 436                                 for (int n=0; n<count; n++)
 437                                 {
 438                                         index[0] = n;
 439                                         object item = itemProp.GetValue (ob, index);
 440                                         XmlTypeMapElementInfo info = map.FindElement (container, n, item);
 441                                         if (info != null && targetString == null) WriteMemberElement (info, item);
 442                                         else if (info != null && targetString != null) targetString.Append (GetStringValue (info.MappedType, info.TypeData, item)).Append (" ");
 443                                         else if (item != null) throw CreateUnknownTypeException (item);
 444                                 }
 445                         }
 446                         else if (ob is IEnumerable)
 447                         {
 448                                 IEnumerable e = (IEnumerable)ob;
 449                                 foreach (object item in e)
 450                                 {
 451                                         XmlTypeMapElementInfo info = map.FindElement (container, -1, item);
 452                                         if (info != null && targetString == null) WriteMemberElement (info, item);
 453                                         else if (info != null && targetString != null) targetString.Append (GetStringValue (info.MappedType, info.TypeData, item)).Append (" ");
 454                                         else if (item != null) throw CreateUnknownTypeException (item);
 455                                 }
 456                         }
 457                         else
 458                                 throw new Exception ("Unsupported collection type");
 459                 }
 460
 461                 int GetListCount (TypeData listType, object ob)
 462                 {
 463                         if (listType.Type.IsArray)
 464                                 return ((Array)ob).Length;
 465                         else
 466                                 return (int) listType.Type.GetProperty ("Count").GetValue(ob,null);
 467                 }
 468
 469                 void WriteAnyElementContent (XmlTypeMapMemberAnyElement member, object memberValue)
 470                 {
 471                         if (member.TypeData.Type == typeof (XmlElement)) {
 472                                 memberValue = new object[] { memberValue };
 473                         }
 474
 475                         Array elems = (Array) memberValue;
 476                         foreach (var elem_ in elems)
 477                         {
 478                                 XmlNode elem = elem_ as XmlNode;
 479                                 if (elem == null)
 480                                         throw new InvalidOperationException (String.Format ("XmlAnyElementAttribute can only be applied to members of type XmlElement, XmlElement[] or XmlNode[]. The target object is {0}", elem_ != null ? elem_.GetType () : null));
 481                                 if (elem is XmlElement)
 482                                 {
 483                                         if (member.IsElementDefined (elem.Name, elem.NamespaceURI))
 484                                         {
 485                                                 if (_format == SerializationFormat.Literal) WriteElementLiteral (elem, "", "", false, true);
 486                                                 else WriteElementEncoded (elem, "", "", false, true);
 487                                         }
 488                                         else
 489                                                 throw CreateUnknownAnyElementException (elem.Name, elem.NamespaceURI);
 490                                 }
 491                                 else
 492                                         elem.WriteTo (Writer);
 493                         }
 494                 }
 495
 496                 protected virtual void WritePrimitiveElement (XmlTypeMapping typeMap, object ob, string element, string namesp)
 497                 {
 498                         Writer.WriteString (GetStringValue (typeMap, typeMap.TypeData, ob));
 499                 }
 500
 501                 protected virtual void WriteEnumElement (XmlTypeMapping typeMap, object ob, string element, string namesp)
 502                 {
 503                         Writer.WriteString (GetEnumXmlValue (typeMap, ob));
 504                 }
 505
 506                 string GetStringValue (XmlTypeMapping typeMap, TypeData type, object value)
 507                 {
 508                         if (type.SchemaType == SchemaTypes.Array) {
 509                                 if (value == null) return null;
 510                                 StringBuilder sb = new StringBuilder ();
 511                                 WriteListContent (null, typeMap.TypeData, (ListMap)typeMap.ObjectMap, value, sb);
 512                                 return sb.ToString ().Trim ();
 513                         }
 514                         else if (type.SchemaType == SchemaTypes.Enum)
 515                                 return GetEnumXmlValue (typeMap, value);
 516                         else if (type.Type == typeof (XmlQualifiedName))
 517                                 return FromXmlQualifiedName ((XmlQualifiedName)value);
 518                         else if (value == null)
 519                                 return null;
 520                         else
 521                                 return XmlCustomFormatter.ToXmlString (type, value);
 522                 }
 523
 524                 string GetEnumXmlValue (XmlTypeMapping typeMap, object ob)
 525                 {
 526                         if (ob == null)
 527                                 return null;
 528                         EnumMap map = (EnumMap)typeMap.ObjectMap;
 529                         return map.GetXmlName (typeMap.TypeFullName, ob);
 530                 }
 531
 532                 class CallbackInfo
 533                 {
 534                         XmlSerializationWriterInterpreter _swi;
 535                         XmlTypeMapping _typeMap;
 536
 537                         public CallbackInfo (XmlSerializationWriterInterpreter swi, XmlTypeMapping typeMap)
 538                         {
 539                                 _swi = swi;
 540                                 _typeMap = typeMap;
 541                         }
 542
 543                         internal void WriteObject (object ob)
 544                         {
 545                                 _swi.WriteObject (_typeMap, ob, _typeMap.ElementName, _typeMap.Namespace, false, false, false);
 546                         }
 547
 548                         internal void WriteEnum (object ob)
 549                         {
 550                                 _swi.WriteObject (_typeMap, ob, _typeMap.ElementName, _typeMap.Namespace, false, true, false);
 551                         }
 552                 }
 553
 554         }
 555 }