mcs/class/System.XML/Mono.Xml.Schema/XsdValidatingReader.cs

   1 //
   2 // Mono.Xml.Schema.XsdValidatingReader.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto (ginga@kit.hi-ho.ne.jp)
   6 //
   7 //      (C)2003 Atsushi Enomoto
   8 //
   9 // Note:
  10 //
  11 // This class doesn't support set_XmlResolver, since it isn't common to XmlReader interface.
  12 // Try to set that of xml reader which is used to construct this object.
  13 //
  14 using System;
  15 using System.Collections;
  16 using System.Collections.Specialized;
  17 using System.Text;
  18 using System.Xml;
  19 using System.Xml.Schema;
  20 using Mono.Xml;
  21
  22 namespace Mono.Xml.Schema
  23 {
  24         internal class XsdValidatingReader : XmlReader, IXmlLineInfo, IHasXmlSchemaInfo, IHasXmlParserContext
  25         {
  26                 static char [] wsChars = new char [] {' ', '\t', '\n', '\r'};
  27
  28                 XmlReader reader;
  29                 XmlValidatingReader xvReader;
  30                 XmlResolver resolver;
  31                 IHasXmlSchemaInfo sourceReaderSchemaInfo;
  32                 IXmlLineInfo readerLineInfo;
  33                 bool laxElementValidation = true;
  34                 bool reportNoValidationError;
  35                 XmlSchemaCollection schemas = new XmlSchemaCollection ();
  36                 bool namespaces = true;
  37
  38                 Hashtable idList = new Hashtable ();
  39                 ArrayList missingIDReferences = new ArrayList ();
  40                 string thisElementId;
  41
  42                 ArrayList keyTables = new ArrayList ();
  43                 ArrayList currentKeyFieldConsumers = new ArrayList ();
  44
  45                 XsdValidationStateManager stateManager = new XsdValidationStateManager ();
  46                 XsdValidationContext context = new XsdValidationContext ();
  47                 XsdValidationState childParticleState;
  48
  49                 int xsiNilDepth = -1;
  50                 StringBuilder storedCharacters = new StringBuilder ();
  51                 bool shouldValidateCharacters;
  52                 int skipValidationDepth = -1;
  53
  54                 XmlSchemaAttribute [] defaultAttributes = new XmlSchemaAttribute [0];
  55                 int currentDefaultAttribute = -1;
  56                 XmlQualifiedName currentQName;
  57
  58                 ArrayList elementQNameStack = new ArrayList ();
  59                 bool popContext;
  60
  61                 // Property Cache.
  62                 int nonDefaultAttributeCount;
  63                 bool defaultAttributeConsumed;
  64
  65                 // Validation engine cached object
  66                 ArrayList defaultAttributesCache = new ArrayList ();
  67                 ArrayList tmpKeyrefPool = new ArrayList ();
  68
  69 #region .ctor
  70                 public XsdValidatingReader (XmlReader reader)
  71                         : this (reader, null)
  72                 {
  73                 }
  74
  75                 public XsdValidatingReader (XmlReader reader, XmlReader validatingReader)
  76                 {
  77                         this.reader = reader;
  78                         xvReader = validatingReader as XmlValidatingReader;
  79                         if (xvReader != null) {
  80                                 if (xvReader.ValidationType == ValidationType.None)
  81                                         reportNoValidationError = true;
  82                         }
  83                         readerLineInfo = reader as IXmlLineInfo;
  84                         sourceReaderSchemaInfo = reader as IHasXmlSchemaInfo;
  85                 }
  86 #endregion
  87                 // Provate Properties
  88                 private XmlQualifiedName CurrentQName {
  89                         get {
  90                                 if (currentQName == null)
  91                                         currentQName = new XmlQualifiedName (LocalName, NamespaceURI);
  92                                 return currentQName;
  93                         }
  94                 }
  95
  96                 internal ArrayList CurrentKeyFieldConsumers {
  97                         get { return currentKeyFieldConsumers; }
  98                 }
  99
 100                 // Public Non-overrides
 101
 102                 public int XsiNilDepth {
 103                         get { return xsiNilDepth; }
 104                 }
 105
 106                 public bool Namespaces {
 107                         get { return namespaces; }
 108                         set { namespaces = value; }
 109                 }
 110
 111                 public XmlReader Reader {
 112                         get { return reader; }
 113                 }
 114
 115                 // This is required to resolve xsi:schemaLocation
 116                 public XmlResolver XmlResolver {
 117                         set {
 118                                 resolver = value;
 119                         }
 120                 }
 121
 122                 // This should be changed before the first Read() call.
 123                 public XmlSchemaCollection Schemas {
 124                         get { return schemas; }
 125                 }
 126
 127                 public object SchemaType {
 128                         get {
 129                                 if (ReadState != ReadState.Interactive)
 130                                         return null;
 131
 132                                 switch (NodeType) {
 133                                 case XmlNodeType.Element:
 134                                         if (context.ActualType != null)
 135                                                 return context.ActualType;
 136                                         else if (context.Element != null)
 137                                                 return context.Element.ElementType;
 138                                         else
 139                                                 return SourceReaderSchemaType;
 140                                 case XmlNodeType.Attribute:
 141                                         XmlSchemaComplexType ct = context.ActualType as XmlSchemaComplexType;
 142                                         if (ct != null) {
 143                                                 XmlSchemaAttribute attdef = ct.AttributeUses [CurrentQName] as XmlSchemaAttribute;
 144                                                 if (attdef != null)
 145                                                         return attdef.AttributeType;
 146                                         }
 147                                         return SourceReaderSchemaType;
 148                                 default:
 149                                         return SourceReaderSchemaType;
 150                                 }
 151                         }
 152                 }
 153
 154                 private object SourceReaderSchemaType {
 155                         get { return this.sourceReaderSchemaInfo != null ? sourceReaderSchemaInfo.SchemaType : null; }
 156                 }
 157
 158                 // This property is never used in Mono.
 159                 public ValidationType ValidationType {
 160                         get {
 161                                 if (reportNoValidationError)
 162                                         return ValidationType.None;
 163                                 else
 164                                         return ValidationType.Schema;
 165                         }
 166                 }
 167
 168                 // It is used only for independent XmlReader use, not for XmlValidatingReader.
 169                 public object ReadTypedValue ()
 170                 {
 171                         XmlSchemaDatatype dt = SchemaType as XmlSchemaDatatype;
 172                         XmlSchemaSimpleType st = SchemaType as XmlSchemaSimpleType;
 173                         if (st != null)
 174                                 dt = st.Datatype;
 175                         if (dt == null)
 176                                 return null;
 177
 178                         switch (NodeType) {
 179                         case XmlNodeType.Element:
 180                                 if (IsEmptyElement)
 181                                         return null;
 182
 183                                 storedCharacters.Length = 0;
 184                                 bool loop = true;
 185                                 do {
 186                                         Read ();
 187                                         switch (NodeType) {
 188                                         case XmlNodeType.SignificantWhitespace:
 189                                         case XmlNodeType.Text:
 190                                         case XmlNodeType.CDATA:
 191                                                 storedCharacters.Append (Value);
 192                                                 break;
 193                                         case XmlNodeType.Comment:
 194                                                 break;
 195                                         default:
 196                                                 loop = false;
 197                                                 break;
 198                                         }
 199                                 } while (loop && !EOF);
 200                                 return dt.ParseValue (storedCharacters.ToString (), NameTable, ParserContext.NamespaceManager);
 201                         case XmlNodeType.Attribute:
 202                                 return dt.ParseValue (Value, NameTable, ParserContext.NamespaceManager);
 203                         }
 204                         return null;
 205                 }
 206
 207                 /*
 208                 public ValueType ReadTypedValueType ()
 209                 {
 210                         XmlSchemaDatatype dt = SchemaType as XmlSchemaDatatype;
 211                         XmlSchemaSimpleType st = SchemaType as XmlSchemaSimpleType;
 212                         if (st != null)
 213                                 dt = st.Datatype;
 214                         if (dt == null)
 215                                 return null;
 216
 217                         switch (NodeType) {
 218                         case XmlNodeType.Element:
 219                                 if (IsEmptyElement)
 220                                         return null;
 221
 222                                 storedCharacters.Length = 0;
 223                                 bool loop = true;
 224                                 do {
 225                                         Read ();
 226                                         switch (NodeType) {
 227                                         case XmlNodeType.SignificantWhitespace:
 228                                         case XmlNodeType.Text:
 229                                         case XmlNodeType.CDATA:
 230                                                 storedCharacters.Append (Value);
 231                                                 break;
 232                                         case XmlNodeType.Comment:
 233                                                 break;
 234                                         default:
 235                                                 loop = false;
 236                                                 break;
 237                                         }
 238                                 } while (loop && !EOF);
 239                                 return dt.ParseValueType (storedCharacters.ToString (), NameTable, ParserContext.NamespaceManager);
 240                         case XmlNodeType.Attribute:
 241                                 return dt.ParseValueType (Value, NameTable, ParserContext.NamespaceManager);
 242                         }
 243                         return null;
 244                 }
 245                 */
 246
 247                 public ValidationEventHandler ValidationEventHandler;
 248
 249                 // Public Overrided Properties
 250
 251                 public override int AttributeCount {
 252                         get {
 253                                 /*
 254                                 if (NodeType == XmlNodeType.Element)
 255                                         return attributeCount;
 256                                 else if (IsDefault)
 257                                         return 0;
 258                                 else
 259                                         return reader.AttributeCount;
 260                                 */
 261                                 return nonDefaultAttributeCount + defaultAttributes.Length;
 262                         }
 263                 }
 264
 265                 public override string BaseURI {
 266                         get { return reader.BaseURI; }
 267                 }
 268
 269                 // If this class is used to implement XmlValidatingReader,
 270                 // it should be left to DTDValidatingReader. In other cases,
 271                 // it depends on the reader's ability.
 272                 public override bool CanResolveEntity {
 273                         get { return reader.CanResolveEntity; }
 274                 }
 275
 276                 public override int Depth {
 277                         get {
 278                                 if (currentDefaultAttribute < 0)
 279                                         return reader.Depth;
 280                                 if (this.defaultAttributeConsumed)
 281                                         return reader.Depth + 2;
 282                                 return reader.Depth + 1;
 283                         }
 284                 }
 285
 286                 public override bool EOF {
 287                         get { return reader.EOF; }
 288                 }
 289
 290                 public override bool HasValue {
 291                         get {
 292                                 if (currentDefaultAttribute < 0)
 293                                         return reader.HasValue;
 294                                 return true;
 295                         }
 296                 }
 297
 298                 public override bool IsDefault {
 299                         get {
 300                                 if (currentDefaultAttribute < 0)
 301                                         return reader.IsDefault;
 302                                 return true;
 303                         }
 304                 }
 305
 306                 public override bool IsEmptyElement {
 307                         get {
 308                                 if (currentDefaultAttribute < 0)
 309                                         return reader.IsEmptyElement;
 310                                 return false;
 311                         }
 312                 }
 313
 314                 public override string this [int i] {
 315                         get { return GetAttribute (i); }
 316                 }
 317
 318                 public override string this [string name] {
 319                         get { return GetAttribute (name); }
 320                 }
 321
 322                 public override string this [string localName, string ns] {
 323                         get { return GetAttribute (localName, ns); }
 324                 }
 325
 326                 int IXmlLineInfo.LineNumber {
 327                         get { return readerLineInfo != null ? readerLineInfo.LineNumber : 0; }
 328                 }
 329
 330                 int IXmlLineInfo.LinePosition {
 331                         get { return readerLineInfo != null ? readerLineInfo.LinePosition : 0; }
 332                 }
 333
 334                 public override string LocalName {
 335                         get {
 336                                 if (currentDefaultAttribute < 0)
 337                                         return reader.LocalName;
 338                                 if (defaultAttributeConsumed)
 339                                         return String.Empty;
 340                                 return defaultAttributes [currentDefaultAttribute].QualifiedName.Name;
 341                         }
 342                 }
 343
 344                 public override string Name {
 345                         get {
 346                                 if (currentDefaultAttribute < 0)
 347                                         return reader.Name;
 348                                 if (defaultAttributeConsumed)
 349                                         return String.Empty;
 350
 351                                 XmlQualifiedName qname = defaultAttributes [currentDefaultAttribute].QualifiedName;
 352                                 string prefix = Prefix;
 353                                 if (prefix == String.Empty)
 354                                         return qname.Name;
 355                                 else
 356                                         return String.Concat (prefix, ":", qname.Name);
 357                         }
 358                 }
 359
 360                 public override string NamespaceURI {
 361                         get {
 362                                 if (currentDefaultAttribute < 0)
 363                                         return reader.NamespaceURI;
 364                                 if (defaultAttributeConsumed)
 365                                         return String.Empty;
 366                                 return defaultAttributes [currentDefaultAttribute].QualifiedName.Namespace;
 367                         }
 368                 }
 369
 370                 public override XmlNameTable NameTable {
 371                         get { return reader.NameTable; }
 372                 }
 373
 374                 public override XmlNodeType NodeType {
 375                         get {
 376                                 if (currentDefaultAttribute < 0)
 377                                         return reader.NodeType;
 378                                 if (defaultAttributeConsumed)
 379                                         return XmlNodeType.Text;
 380                                 return XmlNodeType.Attribute;
 381                         }
 382                 }
 383
 384                 public XmlParserContext ParserContext {
 385                         get { return XmlSchemaUtil.GetParserContext (reader); }
 386                 }
 387
 388                 public override string Prefix {
 389                         get {
 390                                 if (currentDefaultAttribute < 0)
 391                                         return reader.Prefix;
 392                                 if (defaultAttributeConsumed)
 393                                         return String.Empty;
 394                                 XmlQualifiedName qname = defaultAttributes [currentDefaultAttribute].QualifiedName;
 395                                 string prefix = this.ParserContext.NamespaceManager.LookupPrefix (qname.Namespace, false);
 396                                 if (prefix == null)
 397                                         return String.Empty;
 398                                 else
 399                                         return prefix;
 400                         }
 401                 }
 402
 403                 public override char QuoteChar {
 404                         get { return reader.QuoteChar; }
 405                 }
 406
 407                 public override ReadState ReadState {
 408                         get { return reader.ReadState; }
 409                 }
 410
 411                 public override string Value {
 412                         get {
 413                                 if (currentDefaultAttribute < 0)
 414                                         return reader.Value;
 415                                 string value = defaultAttributes [currentDefaultAttribute].ValidatedDefaultValue;
 416                                 if (value == null)
 417                                         value = defaultAttributes [currentDefaultAttribute].ValidatedFixedValue;
 418                                 return value;
 419                         }
 420                 }
 421
 422                 XmlQualifiedName qnameXmlLang = new XmlQualifiedName ("lang", XmlNamespaceManager.XmlnsXml);
 423
 424                 public override string XmlLang {
 425                         get {
 426                                 string xmlLang = reader.XmlLang;
 427                                 if (xmlLang != null)
 428                                         return xmlLang;
 429                                 int idx = this.FindDefaultAttribute ("lang", XmlNamespaceManager.XmlnsXml);
 430                                 if (idx < 0)
 431                                         return null;
 432                                 xmlLang = defaultAttributes [idx].ValidatedDefaultValue;
 433                                 if (xmlLang == null)
 434                                         xmlLang = defaultAttributes [idx].ValidatedFixedValue;
 435                                 return xmlLang;
 436                         }
 437                 }
 438
 439                 public override XmlSpace XmlSpace {
 440                         get {
 441                                 XmlSpace space = reader.XmlSpace;
 442                                 if (space != XmlSpace.None)
 443                                         return space;
 444                                 int idx = this.FindDefaultAttribute ("space", XmlNamespaceManager.XmlnsXml);
 445                                 if (idx < 0)
 446                                         return XmlSpace.None;
 447                                 string spaceSpec = defaultAttributes [idx].ValidatedDefaultValue;
 448                                 if (spaceSpec == null)
 449                                         spaceSpec = defaultAttributes [idx].ValidatedFixedValue;
 450                                 return (XmlSpace) Enum.Parse (typeof (XmlSpace), spaceSpec, false);
 451                         }
 452                 }
 453
 454                 // Private Methods
 455
 456                 private XmlQualifiedName QualifyName (string name)
 457                 {
 458                         int colonAt = name.IndexOf (':');
 459                         if (colonAt < 0)
 460                                 return new XmlQualifiedName (name, null);
 461                         else
 462                                 return new XmlQualifiedName (name.Substring (colonAt + 1),
 463                                         LookupNamespace (name.Substring (0, colonAt)));
 464                 }
 465
 466                 private void HandleError (string error)
 467                 {
 468                         HandleError (error, null);
 469                 }
 470
 471                 private void HandleError (string error, Exception innerException)
 472                 {
 473                         HandleError (error, innerException, false);
 474                 }
 475
 476                 private void HandleError (string error, Exception innerException, bool isWarning)
 477                 {
 478                         if (reportNoValidationError)    // extra quick check
 479                                 return;
 480
 481                         XmlSchemaException schemaException = new XmlSchemaException (error,
 482                                         this, this.BaseURI, null, innerException);
 483                         HandleError (schemaException, isWarning);
 484                 }
 485
 486                 private void HandleError (XmlSchemaException schemaException)
 487                 {
 488                         HandleError (schemaException, false);
 489                 }
 490
 491                 private void HandleError (XmlSchemaException schemaException, bool isWarning)
 492                 {
 493                         if (reportNoValidationError)
 494                                 return;
 495
 496                         ValidationEventArgs e = new ValidationEventArgs (schemaException,
 497                                 schemaException.Message, isWarning ? XmlSeverityType.Warning : XmlSeverityType.Error);
 498
 499                         if (this.ValidationEventHandler != null)
 500                                 this.ValidationEventHandler (this, e);
 501                         else if (xvReader != null)
 502                                 xvReader.OnValidationEvent (this, e);
 503                         else if (e.Severity == XmlSeverityType.Error)
 504 #if NON_MONO_ENV
 505                                 this.xvReader.OnValidationEvent (this, e);
 506 #else
 507                                 throw e.Exception;
 508 #endif
 509                 }
 510
 511                 private XmlSchemaElement FindElement (string name, string ns)
 512                 {
 513                         foreach (XmlSchema target in schemas) {
 514                                 XmlSchema matches = target.Schemas [ns];
 515                                 if (matches != null) {
 516                                         XmlSchemaElement result = target.Elements [new XmlQualifiedName (name, ns)] as XmlSchemaElement;
 517                                         if (result != null)
 518                                                 return result;
 519                                 }
 520                         }
 521                         return null;
 522                 }
 523
 524                 private XmlSchemaType FindType (XmlQualifiedName qname)
 525                 {
 526                         foreach (XmlSchema target in schemas) {
 527                                 XmlSchemaType type = target.SchemaTypes [qname] as XmlSchemaType;
 528                                 if (type != null)
 529                                         return type;
 530                         }
 531                         return null;
 532                 }
 533
 534                 private void ValidateStartElementParticle ()
 535                 {
 536                         stateManager.CurrentElement = null;
 537                         context.ParticleState = context.ParticleState.EvaluateStartElement (reader.LocalName, reader.NamespaceURI);
 538                         if (context.ParticleState == XsdValidationState.Invalid)
 539                                 HandleError ("Invalid start element: " + reader.NamespaceURI + ":" + reader.LocalName);
 540
 541                         context.Element = stateManager.CurrentElement;
 542                         if (context.Element != null)
 543                                 context.SchemaType = context.Element.ElementType;
 544                 }
 545
 546                 private void ValidateEndElementParticle ()
 547                 {
 548                         if (childParticleState != null) {
 549                                 if (!childParticleState.EvaluateEndElement ()) {
 550                                         HandleError ("Invalid end element: " + reader.Name);
 551                                 }
 552                         }
 553                         context.PopScope (reader.Depth);
 554                 }
 555
 556                 // Utility for missing validation completion related to child items.
 557                 private void ValidateCharacters ()
 558                 {
 559                         if (xsiNilDepth >= 0 && xsiNilDepth < reader.Depth)
 560                                 HandleError ("Element item appeared, while current element context is nil.");
 561
 562                         storedCharacters.Append (reader.Value);
 563                 }
 564
 565                 // Utility for missing validation completion related to child items.
 566                 private void ValidateEndCharacters ()
 567                 {
 568                         if (context.ActualType == null)
 569                                 return;
 570
 571                         string value = storedCharacters.ToString ();
 572
 573                         if (storedCharacters.Length == 0) {
 574                                 // 3.3.4 Element Locally Valid (Element) 5.1.2
 575                                 if (context.Element != null) {
 576                                         if (context.Element.ValidatedDefaultValue != null)
 577                                                 value = context.Element.ValidatedDefaultValue;
 578                                 }
 579                         }
 580
 581                         XmlSchemaDatatype dt = context.ActualType as XmlSchemaDatatype;
 582                         XmlSchemaSimpleType st = context.ActualType as XmlSchemaSimpleType;
 583                         if (dt == null) {
 584                                 if (st != null) {
 585                                         dt = st.Datatype;
 586                                 } else {
 587                                         XmlSchemaComplexType ct = context.ActualType as XmlSchemaComplexType;
 588                                         dt = ct.Datatype;
 589                                         switch (ct.ContentType) {
 590                                         case XmlSchemaContentType.ElementOnly:
 591                                         case XmlSchemaContentType.Empty:
 592                                                 if (storedCharacters.Length > 0)
 593                                                         HandleError ("Character content not allowed.");
 594                                                 break;
 595                                         }
 596                                 }
 597                         }
 598                         if (dt != null) {
 599                                 // 3.3.4 Element Locally Valid (Element) :: 5.2.2.2. Fixed value constraints
 600                                 if (context.Element != null && context.Element.ValidatedFixedValue != null)
 601                                         if (value != context.Element.ValidatedFixedValue)
 602                                                 HandleError ("Fixed value constraint was not satisfied.");
 603                                 AssessStringValid (st, dt, value);
 604                         }
 605
 606                         // Identity field value
 607                         while (this.currentKeyFieldConsumers.Count > 0) {
 608                                 XsdKeyEntryField field = this.currentKeyFieldConsumers [0] as XsdKeyEntryField;
 609                                 if (field.Identity != null)
 610                                         HandleError ("Two or more identical field was found. Former value is '" + field.Identity + "' .");
 611                                 object identity = null; // This means empty value
 612                                 if (dt != null) {
 613                                         try {
 614                                                 identity = dt.ParseValue (value, NameTable, ParserContext.NamespaceManager);
 615                                         } catch (Exception ex) { // FIXME: (wishlist) This is bad manner ;-(
 616                                                 HandleError ("Identity value is invalid against its data type " + dt.TokenizedType, ex);
 617                                         }
 618                                 }
 619                                 if (identity == null)
 620                                         identity = value;
 621
 622                                 if (!field.SetIdentityField (identity, reader.Depth == xsiNilDepth, dt as XsdAnySimpleType, this))
 623                                         HandleError ("Two or more identical key value was found: '" + value + "' .");
 624                                 this.currentKeyFieldConsumers.RemoveAt (0);
 625                         }
 626
 627                         shouldValidateCharacters = false;
 628                 }
 629
 630                 // 3.14.4 String Valid
 631                 private void AssessStringValid (XmlSchemaSimpleType st,
 632                         XmlSchemaDatatype dt, string value)
 633                 {
 634                         XmlSchemaDatatype validatedDatatype = dt;
 635                         if (st != null) {
 636                                 string normalized = validatedDatatype.Normalize (value);
 637                                 string [] values;
 638                                 XmlSchemaDatatype itemDatatype;
 639                                 XmlSchemaSimpleType itemSimpleType;
 640                                 switch (st.DerivedBy) {
 641                                 case XmlSchemaDerivationMethod.List:
 642                                         XmlSchemaSimpleTypeList listContent = st.Content as XmlSchemaSimpleTypeList;
 643                                         values = normalized.Split (wsChars);
 644                                         itemDatatype = listContent.ValidatedListItemType as XmlSchemaDatatype;
 645                                         itemSimpleType = listContent.ValidatedListItemType as XmlSchemaSimpleType;
 646                                         for (int vi = 0; vi < values.Length; vi++) {
 647                                                 string each = values [vi];
 648                                                 if (each == String.Empty)
 649                                                         continue;
 650                                                 // validate against ValidatedItemType
 651                                                 if (itemDatatype != null) {
 652                                                         try {
 653                                                                 itemDatatype.ParseValue (each, NameTable, ParserContext.NamespaceManager);
 654                                                         } catch (Exception ex) { // FIXME: (wishlist) better exception handling ;-(
 655                                                                 HandleError ("List type value contains one or more invalid values.", ex);
 656                                                                 break;
 657                                                         }
 658                                                 }
 659                                                 else
 660                                                         AssessStringValid (itemSimpleType, itemSimpleType.Datatype, each);
 661                                         }
 662                                         break;
 663                                 case XmlSchemaDerivationMethod.Union:
 664                                         XmlSchemaSimpleTypeUnion union = st.Content as XmlSchemaSimpleTypeUnion;
 665                                         {
 666                                                 string each = normalized;
 667                                                 // validate against ValidatedItemType
 668                                                 bool passed = false;
 669                                                 foreach (object eachType in union.ValidatedTypes) {
 670                                                         itemDatatype = eachType as XmlSchemaDatatype;
 671                                                         itemSimpleType = eachType as XmlSchemaSimpleType;
 672                                                         if (itemDatatype != null) {
 673                                                                 try {
 674                                                                         itemDatatype.ParseValue (each, NameTable, ParserContext.NamespaceManager);
 675                                                                 } catch (Exception) { // FIXME: (wishlist) better exception handling ;-(
 676                                                                         continue;
 677                                                                 }
 678                                                         }
 679                                                         else {
 680                                                                 try {
 681                                                                         AssessStringValid (itemSimpleType, itemSimpleType.Datatype, each);
 682                                                                 } catch (XmlSchemaException) {
 683                                                                         continue;
 684                                                                 }
 685                                                         }
 686                                                         passed = true;
 687                                                         break;
 688                                                 }
 689                                                 if (!passed) {
 690                                                         HandleError ("Union type value contains one or more invalid values.");
 691                                                         break;
 692                                                 }
 693                                         }
 694                                         break;
 695                                 case XmlSchemaDerivationMethod.Restriction:
 696                                         XmlSchemaSimpleTypeRestriction str = st.Content as XmlSchemaSimpleTypeRestriction;
 697                                         // facet validation
 698                                         if (str != null) {
 699                                                 /* Don't forget to validate against inherited type's facets
 700                                                  * Could we simplify this by assuming that the basetype will also
 701                                                  * be restriction?
 702                                                  * */
 703                                                  // mmm, will check later.
 704                                                 XmlSchemaSimpleType baseType = st.BaseXmlSchemaType as XmlSchemaSimpleType;
 705                                                 if (baseType != null) {
 706                                                          AssessStringValid(baseType, dt, normalized);
 707                                                 }
 708                                                 if (!str.ValidateValueWithFacets (normalized, NameTable)) {
 709                                                         HandleError ("Specified value was invalid against the facets.");
 710                                                         break;
 711                                                 }
 712                                         }
 713                                         validatedDatatype = st.Datatype;
 714                                         break;
 715                                 }
 716                         }
 717                         if (validatedDatatype != null) {
 718                                 try {
 719                                         validatedDatatype.ParseValue (value, NameTable, ParserContext.NamespaceManager);
 720                                 } catch (Exception ex) {        // FIXME: (wishlist) It is bad manner ;-(
 721                                         HandleError ("Invalidly typed data was specified.", ex);
 722                                 }
 723                         }
 724                 }
 725
 726                 private object GetLocalTypeDefinition (string name)
 727                 {
 728                         object xsiType = null;
 729                         XmlQualifiedName typeQName = QualifyName (name);
 730                         if (typeQName == XmlSchemaComplexType.AnyTypeName)
 731                                 xsiType = XmlSchemaComplexType.AnyType;
 732                         else if (XmlSchemaUtil.IsBuiltInDatatypeName (typeQName))
 733                                 xsiType = XmlSchemaDatatype.FromName (typeQName);
 734                         else
 735                                 xsiType = FindType (typeQName);
 736                         return xsiType;
 737                 }
 738
 739                 // It is common to ElementLocallyValid::4 and SchemaValidityAssessment::1.2.1.2.4
 740                 private void AssessLocalTypeDerivationOK (object xsiType, object baseType, XmlSchemaDerivationMethod flag)
 741                 {
 742                         XmlSchemaType xsiSchemaType = xsiType as XmlSchemaType;
 743                         XmlSchemaComplexType baseComplexType = baseType as XmlSchemaComplexType;
 744                         XmlSchemaComplexType xsiComplexType = xsiSchemaType as XmlSchemaComplexType;
 745                         if (xsiType != baseType) {
 746                                 // Extracted (not extraneous) check for 3.4.6 TypeDerivationOK.
 747                                 if (baseComplexType != null)
 748                                         flag |= baseComplexType.BlockResolved;
 749                                 if (flag == XmlSchemaDerivationMethod.All) {
 750                                         HandleError ("Prohibited element type substitution.");
 751                                         return;
 752                                 } else if (xsiSchemaType != null && (flag & xsiSchemaType.DerivedBy) != 0) {
 753                                         HandleError ("Prohibited element type substitution.");
 754                                         return;
 755                                 }
 756                         }
 757
 758                         if (xsiComplexType != null)
 759                                 try {
 760                                         xsiComplexType.ValidateTypeDerivationOK (baseType, null, null);
 761                                 } catch (XmlSchemaException ex) {
 762 //                                      HandleError ("Locally specified schema complex type derivation failed. " + ex.Message, ex);
 763                                         HandleError (ex);
 764                                 }
 765                         else {
 766                                 XmlSchemaSimpleType xsiSimpleType = xsiType as XmlSchemaSimpleType;
 767                                 if (xsiSimpleType != null) {
 768                                         try {
 769                                                 xsiSimpleType.ValidateTypeDerivationOK (baseType, null, null, true);
 770                                         } catch (XmlSchemaException ex) {
 771 //                                              HandleError ("Locally specified schema simple type derivation failed. " + ex.Message, ex);
 772                                                 HandleError (ex);
 773                                         }
 774                                 }
 775                                 else if (xsiType is XmlSchemaDatatype) {
 776                                         // do nothing
 777                                 }
 778                                 else
 779                                         HandleError ("Primitive data type cannot be derived type using xsi:type specification.");
 780                         }
 781                 }
 782
 783                 // Section 3.3.4 of the spec.
 784                 private void AssessStartElementSchemaValidity ()
 785                 {
 786                         // If the reader is inside xsi:nil (and failed on validation),
 787                         // then simply skip its content.
 788                         if (xsiNilDepth >= 0 && xsiNilDepth < reader.Depth)
 789                                 HandleError ("Element item appeared, while current element context is nil.");
 790
 791                         context.Load (reader.Depth);
 792                         if (childParticleState != null) {
 793                                 context.ParticleState = childParticleState;
 794                                 childParticleState = null;
 795                         }
 796
 797                         // If validation state exists, then first assess particle validity.
 798                         context.SchemaType = null;
 799                         if (context.ParticleState != null) {
 800                                 ValidateStartElementParticle ();
 801                         }
 802
 803                         string xsiNilValue = reader.GetAttribute ("nil", XmlSchema.InstanceNamespace);
 804                         if (xsiNilValue != null)
 805                                 xsiNilValue = xsiNilValue.Trim (XmlChar.WhitespaceChars);
 806                         bool isXsiNil = xsiNilValue == "true";
 807                         if (isXsiNil && this.xsiNilDepth < 0)
 808                                 xsiNilDepth = reader.Depth;
 809
 810                         // [Schema Validity Assessment (Element) 1.2]
 811                         // Evaluate "local type definition" from xsi:type.
 812                         // (See spec 3.3.4 Schema Validity Assessment (Element) 1.2.1.2.3.
 813                         // Note that Schema Validity Assessment(Element) 1.2 takes
 814                         // precedence than 1.1 of that.
 815
 816                         string xsiTypeName = reader.GetAttribute ("type", XmlSchema.InstanceNamespace);
 817                         if (xsiTypeName != null) {
 818                                 xsiTypeName = xsiTypeName.Trim (XmlChar.WhitespaceChars);
 819                                 object xsiType = GetLocalTypeDefinition (xsiTypeName);
 820                                 if (xsiType == null)
 821                                         HandleError ("The instance type was not found: " + xsiTypeName + " .");
 822                                 else {
 823                                         XmlSchemaType xsiSchemaType = xsiType as XmlSchemaType;
 824                                         if (xsiSchemaType != null && this.context.Element != null) {
 825                                                 XmlSchemaType elemBaseType = context.Element.ElementType as XmlSchemaType;
 826                                                 if (elemBaseType != null && (xsiSchemaType.DerivedBy & elemBaseType.FinalResolved) != 0)
 827                                                         HandleError ("The instance type is prohibited by the type of the context element.");
 828                                                 if (elemBaseType != xsiType && (xsiSchemaType.DerivedBy & this.context.Element.BlockResolved) != 0)
 829                                                         HandleError ("The instance type is prohibited by the context element.");
 830                                         }
 831                                         XmlSchemaComplexType xsiComplexType = xsiType as XmlSchemaComplexType;
 832                                         if (xsiComplexType != null && xsiComplexType.IsAbstract)
 833                                                 HandleError ("The instance type is abstract: " + xsiTypeName + " .");
 834                                         else {
 835                                                 // If current schema type exists, then this xsi:type must be
 836                                                 // valid extension of that type. See 1.2.1.2.4.
 837                                                 if (context.Element != null) {
 838                                                         AssessLocalTypeDerivationOK (xsiType, context.Element.ElementType, context.Element.BlockResolved);
 839                                                 }
 840                                                 AssessStartElementLocallyValidType (xsiType);   // 1.2.2:
 841                                                 context.LocalTypeDefinition = xsiType;
 842                                         }
 843                                 }
 844                         }
 845                         else
 846                                 context.LocalTypeDefinition = null;
 847
 848                         // Create Validation Root, if not exist.
 849                         // [Schema Validity Assessment (Element) 1.1]
 850                         if (context.Element == null)
 851                                 context.Element = FindElement (reader.LocalName, reader.NamespaceURI);
 852                         if (context.Element != null) {
 853                                 if (xsiTypeName == null) {
 854                                         context.SchemaType = context.Element.ElementType;
 855                                         AssessElementLocallyValidElement (context.Element, xsiNilValue);        // 1.1.2
 856                                 }
 857                         } else {
 858                                 XmlSchema schema;
 859                                 switch (stateManager.ProcessContents) {
 860                                 case XmlSchemaContentProcessing.Skip:
 861                                         break;
 862                                 case XmlSchemaContentProcessing.Lax:
 863                                         /*
 864                                         schema = schemas [reader.NamespaceURI];
 865                                         if (schema != null && !schema.missedSubComponents)
 866                                                 HandleError ("Element declaration for " + reader.LocalName + " is missing.");
 867                                         */
 868                                         break;
 869                                 default:
 870                                         schema = schemas [reader.NamespaceURI];
 871                                         if (xsiTypeName == null && (schema == null || !schema.missedSubComponents))
 872                                                 HandleError ("Element declaration for " + reader.LocalName + " is missing.");
 873                                         break;
 874                                 }
 875                         }
 876
 877                         if (stateManager.ProcessContents == XmlSchemaContentProcessing.Skip)
 878                                 skipValidationDepth = reader.Depth;
 879
 880                         // Finally, create child particle state.
 881                         XmlSchemaComplexType xsComplexType = SchemaType as XmlSchemaComplexType;
 882                         if (xsComplexType != null)
 883                                 childParticleState = stateManager.Create (xsComplexType.ValidatableParticle);
 884                         else if (stateManager.ProcessContents == XmlSchemaContentProcessing.Lax)
 885                                 childParticleState = stateManager.Create (XmlSchemaAny.AnyTypeContent);
 886                         else
 887                                 childParticleState = stateManager.Create (XmlSchemaParticle.Empty);
 888
 889                         AssessStartIdentityConstraints ();
 890
 891                         context.PushScope (reader.Depth);
 892                 }
 893
 894                 // 3.3.4 Element Locally Valid (Element)
 895                 private void AssessElementLocallyValidElement (XmlSchemaElement element, string xsiNilValue)
 896                 {
 897                         XmlQualifiedName qname = new XmlQualifiedName (reader.LocalName, reader.NamespaceURI);
 898                         // 1.
 899                         if (element == null)
 900                                 HandleError ("Element declaration is required for " + qname);
 901                         // 2.
 902                         if (element.ActualIsAbstract)
 903                                 HandleError ("Abstract element declaration was specified for " + qname);
 904                         // 3.1.
 905                         if (!element.ActualIsNillable && xsiNilValue != null)
 906                                 HandleError ("This element declaration is not nillable: " + qname);
 907                         // 3.2.
 908                         // Note that 3.2.1 xsi:nil constraints are to be validated in
 909                         else if (xsiNilValue == "true") {
 910                                 // AssessElementSchemaValidity() and ValidateCharacters()
 911
 912                                 if (element.ValidatedFixedValue != null)
 913                                         HandleError ("Schema instance nil was specified, where the element declaration for " + qname + "has fixed value constraints.");
 914                         }
 915                         // 4.
 916                         string xsiType = reader.GetAttribute ("type", XmlSchema.InstanceNamespace);
 917                         if (xsiType != null) {
 918                                 context.LocalTypeDefinition = GetLocalTypeDefinition (xsiType);
 919                                 AssessLocalTypeDerivationOK (context.LocalTypeDefinition, element.ElementType, element.BlockResolved);
 920                         }
 921                         else
 922                                 context.LocalTypeDefinition = null;
 923
 924                         // 5 Not all things cannot be assessed here.
 925                         // It is common to 5.1 and 5.2
 926                         if (element.ElementType != null)
 927                                 AssessStartElementLocallyValidType (SchemaType);
 928
 929                         // 6. should be out from here.
 930                         // See invokation of AssessStartIdentityConstraints().
 931
 932                         // 7 is going to be validated in Read() (in case of xmlreader's EOF).
 933                 }
 934
 935                 // 3.3.4 Element Locally Valid (Type)
 936                 private void AssessStartElementLocallyValidType (object schemaType)
 937                 {
 938                         if (schemaType == null) {       // 1.
 939                                 HandleError ("Schema type does not exist.");
 940                                 return;
 941                         }
 942                         XmlSchemaComplexType cType = schemaType as XmlSchemaComplexType;
 943                         XmlSchemaSimpleType sType = schemaType as XmlSchemaSimpleType;
 944                         if (sType != null) {
 945                                 // 3.1.1.
 946                                 while (reader.MoveToNextAttribute ()) {
 947                                         if (reader.NamespaceURI == XmlNamespaceManager.XmlnsXmlns)
 948                                                 continue;
 949                                         if (reader.NamespaceURI != XmlSchema.InstanceNamespace)
 950                                                 HandleError ("Current simple type cannot accept attributes other than schema instance namespace.");
 951                                         switch (reader.LocalName) {
 952                                         case "type":
 953                                         case "nil":
 954                                         case "schemaLocation":
 955                                         case "noNamespaceSchemaLocation":
 956                                                 break;
 957                                         default:
 958                                                 HandleError ("Unknown schema instance namespace attribute: " + reader.LocalName);
 959                                                 break;
 960                                         }
 961                                 }
 962                                 reader.MoveToElement ();
 963                                 // 3.1.2 and 3.1.3 cannot be assessed here.
 964                         } else if (cType != null) {
 965                                 if (cType.IsAbstract) { // 2.
 966                                         HandleError ("Target complex type is abstract.");
 967                                         return;
 968                                 }
 969                                 // 3.2
 970                                 AssessElementLocallyValidComplexType (cType);
 971                         }
 972                 }
 973
 974                 // 3.4.4 Element Locally Valid (Complex Type)
 975                 private void AssessElementLocallyValidComplexType (XmlSchemaComplexType cType)
 976                 {
 977                         // 1.
 978                         if (cType.IsAbstract)
 979                                 HandleError ("Target complex type is abstract.");
 980
 981                         // 2 (xsi:nil and content prohibition)
 982                         // See AssessStartElementSchemaValidity() and ValidateCharacters()
 983
 984                         string elementNs = reader.NamespaceURI;
 985                         // 3. attribute uses and
 986                         // 5. wild IDs
 987                         while (reader.MoveToNextAttribute ()) {
 988                                 if (reader.NamespaceURI == "http://www.w3.org/2000/xmlns/")
 989                                         continue;
 990                                 else if (reader.NamespaceURI == XmlSchema.InstanceNamespace)
 991                                         continue;
 992                                 XmlQualifiedName qname = new XmlQualifiedName (reader.LocalName, reader.NamespaceURI);
 993                                 object attMatch = FindAttributeDeclaration (cType, qname, elementNs);
 994                                 if (attMatch == null)
 995                                         HandleError ("Attribute declaration was not found for " + qname);
 996                                 else {
 997                                         XmlSchemaAttribute attdecl = attMatch as XmlSchemaAttribute;
 998                                         if (attdecl == null) { // i.e. anyAttribute
 999                                                 XmlSchemaAnyAttribute anyAttrMatch = attMatch as XmlSchemaAnyAttribute;
1000                                         } else {
1001                                                 AssessAttributeLocallyValidUse (attdecl);
1002                                                 AssessAttributeLocallyValid (attdecl, true);
1003                                         }
1004                                 }
1005                         }
1006                         reader.MoveToElement ();
1007
1008                         // Collect default attributes.
1009                         // 4.
1010                         foreach (DictionaryEntry entry in cType.AttributeUses) {
1011                                 XmlSchemaAttribute attr = (XmlSchemaAttribute) entry.Value;
1012                                 if (reader [attr.QualifiedName.Name, attr.QualifiedName.Namespace] == null) {
1013                                         if (attr.ValidatedUse == XmlSchemaUse.Required &&
1014                                                 attr.ValidatedFixedValue == null)
1015                                                 HandleError ("Required attribute " + attr.QualifiedName + " was not found.");
1016                                         else if (attr.ValidatedDefaultValue != null)
1017                                                 defaultAttributesCache.Add (attr);
1018                                         else if (attr.ValidatedFixedValue != null)
1019                                                 defaultAttributesCache.Add (attr);
1020                                 }
1021                         }
1022                         defaultAttributes = (XmlSchemaAttribute [])
1023                                 defaultAttributesCache.ToArray (typeof (XmlSchemaAttribute));
1024                         context.DefaultAttributes = defaultAttributes;
1025                         defaultAttributesCache.Clear ();
1026                         // 5. wild IDs was already checked above.
1027                 }
1028
1029                 // Spec 3.10.4 Item Valid (Wildcard)
1030                 private bool AttributeWildcardItemValid (XmlSchemaAnyAttribute anyAttr, XmlQualifiedName qname)
1031                 {
1032                         if (anyAttr.HasValueAny)
1033                                 return true;
1034                         if (anyAttr.HasValueOther && (anyAttr.TargetNamespace == "" || reader.NamespaceURI != anyAttr.TargetNamespace))
1035                                 return true;
1036                         if (anyAttr.HasValueTargetNamespace && reader.NamespaceURI == anyAttr.TargetNamespace)
1037                                 return true;
1038                         if (anyAttr.HasValueLocal && reader.NamespaceURI == "")
1039                                 return true;
1040                         for (int i = 0; i < anyAttr.ResolvedNamespaces.Count; i++)
1041                                 if (anyAttr.ResolvedNamespaces [i] == reader.NamespaceURI)
1042                                         return true;
1043                         return false;
1044                 }
1045
1046                 private XmlSchemaObject FindAttributeDeclaration (XmlSchemaComplexType cType,
1047                         XmlQualifiedName qname, string elementNs)
1048                 {
1049                         XmlSchemaObject result = cType.AttributeUses [qname];
1050                         if (result != null)
1051                                 return result;
1052                         if (cType.AttributeWildcard == null)
1053                                 return null;
1054
1055                         if (!AttributeWildcardItemValid (cType.AttributeWildcard, qname))
1056                                 return null;
1057
1058                         if (cType.AttributeWildcard.ResolvedProcessContents == XmlSchemaContentProcessing.Skip)
1059                                 return cType.AttributeWildcard;
1060                         foreach (XmlSchema schema in schemas) {
1061                                 foreach (DictionaryEntry entry in schema.Attributes) {
1062                                         XmlSchemaAttribute attr = (XmlSchemaAttribute) entry.Value;
1063                                         if (attr.QualifiedName == qname)
1064                                                 return attr;
1065                                 }
1066                         }
1067                         if (cType.AttributeWildcard.ResolvedProcessContents == XmlSchemaContentProcessing.Lax)
1068                                 return cType.AttributeWildcard;
1069                         else
1070                                 return null;
1071                 }
1072
1073                 // 3.2.4 Attribute Locally Valid and 3.4.4 - 5.wildIDs
1074                 private void AssessAttributeLocallyValid (XmlSchemaAttribute attr, bool checkWildIDs)
1075                 {
1076                         // 1.
1077                         switch (reader.NamespaceURI) {
1078                         case XmlNamespaceManager.XmlnsXml:
1079                         case XmlNamespaceManager.XmlnsXmlns:
1080                         case XmlSchema.InstanceNamespace:
1081                                 break;
1082                         }
1083                         // 2. - 4.
1084                         if (attr.AttributeType == null)
1085                                 HandleError ("Attribute type is missing for " + attr.QualifiedName);
1086                         XmlSchemaDatatype dt = attr.AttributeType as XmlSchemaDatatype;
1087                         if (dt == null)
1088                                 dt = ((XmlSchemaSimpleType) attr.AttributeType).Datatype;
1089                         // It is a bit heavy process, so let's omit as long as possible ;-)
1090                         if (dt != XmlSchemaSimpleType.AnySimpleType || attr.ValidatedFixedValue != null) {
1091                                 string normalized = dt.Normalize (reader.Value);
1092                                 object parsedValue = null;
1093                                 try {
1094                                         parsedValue = dt.ParseValue (normalized, reader.NameTable, this.ParserContext.NamespaceManager);
1095                                 } catch (Exception ex) { // FIXME: (wishlist) It is bad manner ;-(
1096                                         HandleError ("Attribute value is invalid against its data type " + dt.TokenizedType, ex);
1097                                 }
1098                                 if (attr.ValidatedFixedValue != null && attr.ValidatedFixedValue != normalized)
1099                                         HandleError ("The value of the attribute " + attr.QualifiedName + " does not match with its fixed value.");
1100                                 if (checkWildIDs)
1101                                         AssessEachAttributeIdentityConstraint (dt, normalized, parsedValue);
1102                         }
1103                 }
1104
1105                 private void AssessEachAttributeIdentityConstraint (XmlSchemaDatatype dt,
1106                         string normalized, object parsedValue)
1107                 {
1108                         // Get normalized value and (if required) parsedValue if missing.
1109                         switch (dt.TokenizedType) {
1110                         case XmlTokenizedType.IDREFS:
1111                                 if (normalized == null)
1112                                         normalized = dt.Normalize (reader.Value);
1113                                 if (parsedValue == null)
1114                                         parsedValue = dt.ParseValue (normalized, reader.NameTable, ParserContext.NamespaceManager);
1115                                 break;
1116                         case XmlTokenizedType.ID:
1117                         case XmlTokenizedType.IDREF:
1118                                 if (normalized == null)
1119                                         normalized = dt.Normalize (reader.Value);
1120                                 break;
1121                         }
1122
1123                         // Validate identity constraints.
1124                         switch (dt.TokenizedType) {
1125                         case XmlTokenizedType.ID:
1126                                 if (thisElementId != null)
1127                                         HandleError ("ID type attribute was already assigned in the containing element.");
1128                                 thisElementId = normalized;
1129                                 if (idList.Contains (normalized))
1130                                         HandleError ("Duplicate ID value was found.");
1131                                 else
1132                                         idList.Add (normalized, normalized);
1133                                 break;
1134                         case XmlTokenizedType.IDREF:
1135                                 if (missingIDReferences.Contains (normalized))
1136                                         missingIDReferences.Remove (normalized);
1137                                 else
1138                                         missingIDReferences.Add (normalized);
1139                                 break;
1140                         case XmlTokenizedType.IDREFS:
1141                                 string [] idrefs = (string []) parsedValue;
1142                                 for (int i = 0; i < idrefs.Length; i++) {
1143                                         string id = idrefs [i];
1144                                         if (missingIDReferences.Contains (id))
1145                                                 missingIDReferences.Remove (id);
1146                                         else
1147                                                 missingIDReferences.Add (id);
1148                                 }
1149                                 break;
1150                         }
1151                 }
1152
1153                 private void AssessAttributeLocallyValidUse (XmlSchemaAttribute attr)
1154                 {
1155                         // This is extra check than spec 3.5.4
1156                         if (attr.ValidatedUse == XmlSchemaUse.Prohibited)
1157                                 HandleError ("Attribute " + attr.QualifiedName + " is prohibited in this context.");
1158                 }
1159
1160                 private void AssessEndElementSchemaValidity ()
1161                 {
1162                         if (childParticleState == null)
1163                                 childParticleState = context.ParticleState;
1164                         ValidateEndElementParticle ();  // validate against childrens' state.
1165
1166                         if (shouldValidateCharacters) {
1167                                 ValidateEndCharacters ();
1168                                 shouldValidateCharacters = false;
1169                         }
1170
1171                         // 3.3.4 Assess ElementLocallyValidElement 5: value constraints.
1172                         // 3.3.4 Assess ElementLocallyValidType 3.1.3. = StringValid(3.14.4)
1173                         // => ValidateEndCharacters().
1174
1175                         // Reset Identity constraints.
1176                         for (int i = 0; i < keyTables.Count; i++) {
1177                                 XsdKeyTable keyTable = this.keyTables [i] as XsdKeyTable;
1178                                 if (keyTable.StartDepth == reader.Depth) {
1179                                         EndIdentityValidation (keyTable);
1180                                 } else {
1181                                         for (int k = 0; k < keyTable.Entries.Count; k++) {
1182                                                 XsdKeyEntry entry = keyTable.Entries [k] as XsdKeyEntry;
1183                                                 // Remove finished (maybe key not found) entries.
1184                                                 if (entry.StartDepth == reader.Depth) {
1185                                                         if (entry.KeyFound)
1186                                                                 keyTable.FinishedEntries.Add (entry);
1187                                                         else if (entry.KeySequence.SourceSchemaIdentity is XmlSchemaKey)
1188                                                                 HandleError ("Key sequence is missing.");
1189                                                         keyTable.Entries.RemoveAt (k);
1190                                                         k--;
1191                                                 }
1192                                                 // Pop validated key depth to find two or more fields.
1193                                                 else {
1194                                                         for (int j = 0; j < entry.KeyFields.Count; j++) {
1195                                                                 XsdKeyEntryField kf = entry.KeyFields [j];
1196                                                                 if (!kf.FieldFound && kf.FieldFoundDepth == reader.Depth) {
1197                                                                         kf.FieldFoundDepth = 0;
1198                                                                         kf.FieldFoundPath = null;
1199                                                                 }
1200                                                         }
1201                                                 }
1202                                         }
1203                                 }
1204                         }
1205                         for (int i = 0; i < keyTables.Count; i++) {
1206                                 XsdKeyTable keyseq = this.keyTables [i] as XsdKeyTable;
1207                                 if (keyseq.StartDepth == reader.Depth) {
1208                                         keyTables.RemoveAt (i);
1209                                         i--;
1210                                 }
1211                         }
1212
1213                         // Reset xsi:nil, if required.
1214                         if (xsiNilDepth == reader.Depth)
1215                                 xsiNilDepth = -1;
1216                 }
1217
1218                 // 3.11.4 Identity Constraint Satisfied
1219                 private void AssessStartIdentityConstraints ()
1220                 {
1221                         tmpKeyrefPool.Clear ();
1222                         if (context.Element != null && context.Element.Constraints.Count > 0) {
1223                                 // (a) Create new key sequences, if required.
1224                                 for (int i = 0; i < context.Element.Constraints.Count; i++) {
1225                                         XmlSchemaIdentityConstraint ident = (XmlSchemaIdentityConstraint) context.Element.Constraints [i];
1226                                         XsdKeyTable seq = CreateNewKeyTable (ident);
1227                                         if (ident is XmlSchemaKeyref)
1228                                                 tmpKeyrefPool.Add (seq);
1229                                 }
1230                         }
1231
1232                         // (b) Evaluate current key sequences.
1233                         for (int i = 0; i < keyTables.Count; i++) {
1234                                 XsdKeyTable seq  = (XsdKeyTable) keyTables [i];
1235                                 if (seq.SelectorMatches (this.elementQNameStack, reader) != null) {
1236                                         // creates and registers new entry.
1237                                         XsdKeyEntry entry = new XsdKeyEntry (seq, reader);
1238                                         seq.Entries.Add (entry);
1239                                 }
1240                         }
1241
1242                         // (c) Evaluate field paths.
1243                         for (int i = 0; i < keyTables.Count; i++) {
1244                                 XsdKeyTable seq  = (XsdKeyTable) keyTables [i];
1245                                 // If possible, create new field entry candidates.
1246                                 for (int j = 0; j < seq.Entries.Count; j++) {
1247                                         XsdKeyEntry entry = seq.Entries [j] as XsdKeyEntry;
1248                                         try {
1249                                                 entry.FieldMatches (this.elementQNameStack, this);
1250                                         } catch (Exception ex) { // FIXME: (wishlist) It is bad manner ;-(
1251                                                 HandleError ("Identity field value is invalid against its data type.", ex);
1252                                         }
1253                                 }
1254                         }
1255                 }
1256
1257                 private XsdKeyTable CreateNewKeyTable (XmlSchemaIdentityConstraint ident)
1258                 {
1259                         XsdKeyTable seq = new XsdKeyTable (ident, this);
1260                         seq.StartDepth = reader.Depth;
1261                         XmlSchemaKeyref keyref = ident as XmlSchemaKeyref;
1262                         this.keyTables.Add (seq);
1263                         return seq;
1264                 }
1265
1266                 private void EndIdentityValidation (XsdKeyTable seq)
1267                 {
1268                         ArrayList errors = new ArrayList ();
1269                         for (int i = 0; i < seq.Entries.Count; i++) {
1270                                 XsdKeyEntry entry = (XsdKeyEntry) seq.Entries [i];
1271                                 if (entry.KeyFound)
1272                                         continue;
1273                                 if (seq.SourceSchemaIdentity is XmlSchemaKey)
1274                                         errors.Add ("line " + entry.SelectorLineNumber + "position " + entry.SelectorLinePosition);
1275                         }
1276                         if (errors.Count > 0)
1277                                 HandleError ("Invalid identity constraints were found. Key was not found. "
1278                                         + String.Join (", ", errors.ToArray (typeof (string)) as string []));
1279
1280                         errors.Clear ();
1281                         // Find reference target
1282                         XmlSchemaKeyref xsdKeyref = seq.SourceSchemaIdentity as XmlSchemaKeyref;
1283                         if (xsdKeyref != null) {
1284                                 for (int i = this.keyTables.Count - 1; i >= 0; i--) {
1285                                         XsdKeyTable target = this.keyTables [i] as XsdKeyTable;
1286                                         if (target.SourceSchemaIdentity == xsdKeyref.Target) {
1287                                                 seq.ReferencedKey = target;
1288                                                 for (int j = 0; j < seq.FinishedEntries.Count; j++) {
1289                                                         XsdKeyEntry entry = (XsdKeyEntry) seq.FinishedEntries [j];
1290                                                         for (int k = 0; k < target.FinishedEntries.Count; k++) {
1291                                                                 XsdKeyEntry targetEntry = (XsdKeyEntry) target.FinishedEntries [k];
1292                                                                 if (entry.CompareIdentity (targetEntry)) {
1293                                                                         entry.KeyRefFound = true;
1294                                                                         break;
1295                                                                 }
1296                                                         }
1297                                                 }
1298                                         }
1299                                 }
1300                                 if (seq.ReferencedKey == null)
1301                                         HandleError ("Target key was not found.");
1302                                 for (int i = 0; i < seq.FinishedEntries.Count; i++) {
1303                                         XsdKeyEntry entry = (XsdKeyEntry) seq.FinishedEntries [i];
1304                                         if (!entry.KeyRefFound)
1305                                                 errors.Add (" line " + entry.SelectorLineNumber + ", position " + entry.SelectorLinePosition);
1306                                 }
1307                                 if (errors.Count > 0)
1308                                         HandleError ("Invalid identity constraints were found. Referenced key was not found: "
1309                                                 + String.Join (" / ", errors.ToArray (typeof (string)) as string []));
1310                         }
1311                 }
1312
1313                 // Overrided Methods
1314
1315                 public override void Close ()
1316                 {
1317                         reader.Close ();
1318                 }
1319
1320                 public override string GetAttribute (int i)
1321                 {
1322                         switch (reader.NodeType) {
1323                         case XmlNodeType.XmlDeclaration:
1324                         case XmlNodeType.DocumentType:
1325                                 return reader.GetAttribute (i);
1326                         }
1327
1328                         if (reader.AttributeCount > i)
1329                                 reader.GetAttribute (i);
1330                         int defIdx = i - nonDefaultAttributeCount;
1331                         if (i < AttributeCount)
1332                                 return defaultAttributes [defIdx].DefaultValue;
1333
1334                         throw new ArgumentOutOfRangeException ("i", i, "Specified attribute index is out of range.");
1335                 }
1336
1337                 public override string GetAttribute (string name)
1338                 {
1339                         switch (reader.NodeType) {
1340                         case XmlNodeType.XmlDeclaration:
1341                         case XmlNodeType.DocumentType:
1342                                 return reader.GetAttribute (name);
1343                         }
1344
1345                         string value = reader.GetAttribute (name);
1346                         if (value != null)
1347                                 return value;
1348
1349                         XmlQualifiedName qname = SplitQName (name);
1350                         return GetDefaultAttribute (qname.Name, qname.Namespace);
1351                 }
1352
1353                 private XmlQualifiedName SplitQName (string name)
1354                 {
1355                         if (!XmlChar.IsName (name))
1356                                 throw new ArgumentException ("Invalid name was specified.", "name");
1357
1358                         Exception ex = null;
1359                         XmlQualifiedName qname = XmlSchemaUtil.ToQName (reader, name, out ex);
1360                         if (ex != null)
1361                                 return XmlQualifiedName.Empty;
1362                         else
1363                                 return qname;
1364                 }
1365
1366                 public override string GetAttribute (string localName, string ns)
1367                 {
1368                         switch (reader.NodeType) {
1369                         case XmlNodeType.XmlDeclaration:
1370                         case XmlNodeType.DocumentType:
1371                                 return reader.GetAttribute (localName, ns);
1372                         }
1373
1374                         string value = reader.GetAttribute (localName, ns);
1375                         if (value != null)
1376                                 return value;
1377
1378                         return GetDefaultAttribute (localName, ns);
1379                 }
1380
1381                 private string GetDefaultAttribute (string localName, string ns)
1382                 {
1383                         int idx = this.FindDefaultAttribute (localName, ns);
1384                         if (idx < 0)
1385                                 return null;
1386                         string value = defaultAttributes [idx].ValidatedDefaultValue;
1387                         if (value == null)
1388                                 value = defaultAttributes [idx].ValidatedFixedValue;
1389                         return value;
1390                 }
1391
1392                 private int FindDefaultAttribute (string localName, string ns)
1393                 {
1394                         for (int i = 0; i < this.defaultAttributes.Length; i++) {
1395                                 XmlSchemaAttribute attr = defaultAttributes [i];
1396                                 if (attr.QualifiedName.Name == localName &&
1397                                         (ns == null || attr.QualifiedName.Namespace == ns))
1398                                         return i;
1399                         }
1400                         return -1;
1401                 }
1402
1403                 bool IXmlLineInfo.HasLineInfo ()
1404                 {
1405                         return readerLineInfo != null && readerLineInfo.HasLineInfo ();
1406                 }
1407
1408                 public override string LookupNamespace (string prefix)
1409                 {
1410                         return reader.LookupNamespace (prefix);
1411                 }
1412
1413                 public override void MoveToAttribute (int i)
1414                 {
1415                         switch (reader.NodeType) {
1416                         case XmlNodeType.XmlDeclaration:
1417                         case XmlNodeType.DocumentType:
1418                                 reader.MoveToAttribute (i);
1419                                 return;
1420                         }
1421
1422                         currentQName = null;
1423                         if (i < this.nonDefaultAttributeCount) {
1424                                 reader.MoveToAttribute (i);
1425                                 this.currentDefaultAttribute = -1;
1426                                 this.defaultAttributeConsumed = false;
1427                         }
1428
1429                         if (i < AttributeCount) {
1430                                 this.currentDefaultAttribute = i - nonDefaultAttributeCount;
1431                                 this.defaultAttributeConsumed = false;
1432                         }
1433                         else
1434                                 throw new ArgumentOutOfRangeException ("i", i, "Attribute index is out of range.");
1435                 }
1436
1437                 public override bool MoveToAttribute (string name)
1438                 {
1439                         switch (reader.NodeType) {
1440                         case XmlNodeType.XmlDeclaration:
1441                         case XmlNodeType.DocumentType:
1442                                 return reader.MoveToAttribute (name);
1443                         }
1444
1445                         currentQName = null;
1446                         bool b = reader.MoveToAttribute (name);
1447                         if (b) {
1448                                 this.currentDefaultAttribute = -1;
1449                                 this.defaultAttributeConsumed = false;
1450                                 return true;
1451                         }
1452
1453                         return MoveToDefaultAttribute (name, null);
1454                 }
1455
1456                 public override bool MoveToAttribute (string localName, string ns)
1457                 {
1458                         switch (reader.NodeType) {
1459                         case XmlNodeType.XmlDeclaration:
1460                         case XmlNodeType.DocumentType:
1461                                 return reader.MoveToAttribute (localName, ns);
1462                         }
1463
1464                         currentQName = null;
1465                         bool b = reader.MoveToAttribute (localName, ns);
1466                         if (b) {
1467                                 this.currentDefaultAttribute = -1;
1468                                 this.defaultAttributeConsumed = false;
1469                                 return true;
1470                         }
1471
1472                         return MoveToDefaultAttribute (localName, ns);
1473                 }
1474
1475                 private bool MoveToDefaultAttribute (string localName, string ns)
1476                 {
1477                         int idx = this.FindDefaultAttribute (localName, ns);
1478                         if (idx < 0)
1479                                 return false;
1480                         currentDefaultAttribute = idx;
1481                         defaultAttributeConsumed = false;
1482                         return true;
1483                 }
1484
1485                 public override bool MoveToElement ()
1486                 {
1487                         currentDefaultAttribute = -1;
1488                         defaultAttributeConsumed = false;
1489                         currentQName = null;
1490                         return reader.MoveToElement ();
1491                 }
1492
1493                 public override bool MoveToFirstAttribute ()
1494                 {
1495                         switch (reader.NodeType) {
1496                         case XmlNodeType.XmlDeclaration:
1497                         case XmlNodeType.DocumentType:
1498                                 return reader.MoveToFirstAttribute ();
1499                         }
1500
1501                         currentQName = null;
1502                         if (this.nonDefaultAttributeCount > 0) {
1503                                 bool b = reader.MoveToFirstAttribute ();
1504                                 if (b) {
1505                                         currentDefaultAttribute = -1;
1506                                         defaultAttributeConsumed = false;
1507                                 }
1508                                 return b;
1509                         }
1510
1511                         if (this.defaultAttributes.Length > 0) {
1512                                 currentDefaultAttribute = 0;
1513                                 defaultAttributeConsumed = false;
1514                                 return true;
1515                         }
1516                         else
1517                                 return false;
1518                 }
1519
1520                 public override bool MoveToNextAttribute ()
1521                 {
1522                         switch (reader.NodeType) {
1523                         case XmlNodeType.XmlDeclaration:
1524                         case XmlNodeType.DocumentType:
1525                                 return reader.MoveToNextAttribute ();
1526                         }
1527
1528                         currentQName = null;
1529                         if (currentDefaultAttribute >= 0) {
1530                                 if (defaultAttributes.Length == currentDefaultAttribute + 1)
1531                                         return false;
1532                                 currentDefaultAttribute++;
1533                                 defaultAttributeConsumed = false;
1534                                 return true;
1535                         }
1536
1537                         bool b = reader.MoveToNextAttribute ();
1538                         if (b) {
1539                                 currentDefaultAttribute = -1;
1540                                 defaultAttributeConsumed = false;
1541                                 return true;
1542                         }
1543
1544                         if (defaultAttributes.Length > 0) {
1545                                 currentDefaultAttribute = 0;
1546                                 defaultAttributeConsumed = false;
1547                                 return true;
1548                         }
1549                         else
1550                                 return false;
1551                 }
1552
1553                 private void ExamineAdditionalSchema ()
1554                 {
1555                         XmlSchema schema = null;
1556                         string schemaLocation = reader.GetAttribute ("schemaLocation", XmlSchema.InstanceNamespace);
1557                         if (schemaLocation != null) {
1558                                 string [] tmp = null;
1559                                 try {
1560                                         schemaLocation = XmlSchemaDatatype.FromName ("token").Normalize (schemaLocation);
1561                                         tmp = schemaLocation.Split (XmlChar.WhitespaceChars);
1562                                 } catch (Exception ex) {
1563                                         HandleError ("Invalid schemaLocation attribute format.", ex, true);
1564                                         tmp = new string [0];
1565                                 }
1566                                 if (tmp.Length % 2 != 0)
1567                                         HandleError ("Invalid schemaLocation attribute format.");
1568                                 for (int i = 0; i < tmp.Length; i += 2) {
1569                                         Uri absUri = null;
1570                                         try {
1571                                                 absUri = new Uri ((this.BaseURI != "" ? new Uri (BaseURI) : null), tmp [i + 1]);
1572                                                 XmlTextReader xtr = new XmlTextReader (absUri.ToString ());
1573                                                 schema = XmlSchema.Read (xtr, null);
1574                                         } catch (Exception) { // FIXME: (wishlist) It is bad manner ;-(
1575                                                 HandleError ("Could not resolve schema location URI: " + absUri, null, true);\r
1576                                                 continue;
1577                                         }
1578                                         if (schema.TargetNamespace == null)
1579                                                 schema.TargetNamespace = tmp [i];
1580                                         else if (schema.TargetNamespace != tmp [i])
1581                                                 HandleError ("Specified schema has different target namespace.");
1582                                 }
1583                         }
1584                         if (schema != null) {
1585                                 try {
1586                                         schemas.Add (schema, resolver);
1587                                 } catch (XmlSchemaException ex) {
1588                                         HandleError (ex);
1589                                 }
1590                         }
1591                         schema = null;
1592                         string noNsSchemaLocation = reader.GetAttribute ("noNamespaceSchemaLocation", XmlSchema.InstanceNamespace);
1593                         if (noNsSchemaLocation != null) {
1594                                 Uri absUri = null;
1595                                 try {
1596                                         absUri = new Uri ((this.BaseURI != "" ? new Uri (BaseURI) : null), noNsSchemaLocation);
1597                                         XmlTextReader xtr = new XmlTextReader (absUri.ToString ());
1598                                         schema = XmlSchema.Read (xtr, null);
1599                                 } catch (Exception) { // FIXME: (wishlist) It is bad manner ;-(
1600                                         HandleError ("Could not resolve schema location URI: " + absUri, null, true);\r
1601                                 }
1602                                 if (schema != null && schema.TargetNamespace != null)
1603                                         HandleError ("Specified schema has different target namespace.");
1604                         }
1605                         if (schema != null) {
1606                                 try {
1607                                         schema.Compile (ValidationEventHandler, resolver);
1608                                         schemas.Add (schema);
1609                                 } catch (XmlSchemaException ex) {
1610                                         HandleError (ex);
1611                                 }
1612                         }
1613                 }
1614
1615                 public override bool Read ()
1616                 {
1617                         nonDefaultAttributeCount = 0;
1618                         currentDefaultAttribute = -1;
1619                         defaultAttributeConsumed = false;
1620                         currentQName = null;
1621                         thisElementId = null;
1622                         defaultAttributes = new XmlSchemaAttribute [0];
1623                         if (popContext) {
1624                                 elementQNameStack.RemoveAt (elementQNameStack.Count - 1);
1625                                 popContext = false;
1626                         }
1627
1628                         bool result = reader.Read ();
1629                         // 3.3.4 ElementLocallyValidElement 7 = Root Valid.
1630                         if (!result && missingIDReferences.Count > 0)
1631                                 HandleError ("There are missing ID references: " +
1632                                         String.Join (" ",
1633                                         this.missingIDReferences.ToArray (typeof (string)) as string []));
1634
1635                         switch (reader.NodeType) {
1636                         case XmlNodeType.XmlDeclaration:
1637                                 this.nonDefaultAttributeCount = reader.AttributeCount;
1638                                 break;
1639                         case XmlNodeType.Element:
1640                                 nonDefaultAttributeCount = reader.AttributeCount;
1641
1642                                 if (reader.Depth == 0)
1643                                         ExamineAdditionalSchema ();
1644
1645                                 this.elementQNameStack.Add (new XmlQualifiedName (reader.LocalName, reader.NamespaceURI));
1646
1647                                 // If there is no schema information, then no validation is performed.
1648                                 if (schemas.Count == 0)
1649                                         break;
1650
1651                                 if (skipValidationDepth < 0 || reader.Depth <= skipValidationDepth) {
1652                                         if (shouldValidateCharacters) {
1653                                                 ValidateEndCharacters ();
1654                                                 shouldValidateCharacters = false;
1655                                         }
1656                                         AssessStartElementSchemaValidity ();
1657                                         storedCharacters.Length = 0;
1658                                 } else {
1659                                         context.Clear ();
1660                                 }
1661
1662                                 if (reader.IsEmptyElement)
1663                                         goto case XmlNodeType.EndElement;
1664                                 else
1665                                         shouldValidateCharacters = true;
1666                                 break;
1667                         case XmlNodeType.EndElement:
1668                                 if (reader.Depth == skipValidationDepth) {
1669                                         skipValidationDepth = -1;
1670                                         context.Clear ();
1671                                 }
1672                                 else
1673                                         AssessEndElementSchemaValidity ();
1674
1675                                 storedCharacters.Length = 0;
1676                                 childParticleState = null;
1677                                 popContext = true;
1678                                 break;
1679
1680                         case XmlNodeType.CDATA:
1681                         case XmlNodeType.SignificantWhitespace:
1682                         case XmlNodeType.Text:
1683                                 XmlSchemaComplexType ct = context.ActualType as XmlSchemaComplexType;
1684                                 if (ct != null && storedCharacters.Length > 0) {
1685                                         switch (ct.ContentType) {
1686                                         case XmlSchemaContentType.ElementOnly:
1687                                         case XmlSchemaContentType.Empty:
1688                                                 HandleError ("Not allowed character content was found.");
1689                                                 break;
1690                                         }
1691                                 }
1692
1693                                 ValidateCharacters ();
1694                                 break;
1695                         }
1696
1697                         return result;
1698                 }
1699
1700                 public override bool ReadAttributeValue ()
1701                 {
1702                         if (currentDefaultAttribute < 0)
1703                                 return reader.ReadAttributeValue ();
1704
1705                         if (this.defaultAttributeConsumed)
1706                                 return false;
1707
1708                         defaultAttributeConsumed = true;
1709                         return true;
1710                 }
1711
1712 #if NET_1_0
1713                 public override string ReadInnerXml ()
1714                 {
1715                         // MS.NET 1.0 has a serious bug here. It skips validation.
1716                         return reader.ReadInnerXml ();
1717                 }
1718
1719                 public override string ReadOuterXml ()
1720                 {
1721                         // MS.NET 1.0 has a serious bug here. It skips validation.
1722                         return reader.ReadOuterXml ();
1723                 }
1724 #endif
1725
1726                 // XmlReader.ReadString() should call derived this.Read().
1727                 public override string ReadString ()
1728                 {
1729 #if NET_1_0
1730                         return reader.ReadString ();
1731 #else
1732                         return base.ReadString ();
1733 #endif
1734                 }
1735
1736                 // This class itself does not have this feature.
1737                 public override void ResolveEntity ()
1738                 {
1739                         reader.ResolveEntity ();
1740                 }
1741
1742                 internal class XsdValidationContext
1743                 {
1744                         Hashtable contextStack;
1745
1746                         public XsdValidationContext ()
1747                         {
1748                                 contextStack = new Hashtable ();
1749                         }
1750
1751                         // Some of them might be missing (See the spec section 5.3, and also 3.3.4).
1752                         public XmlSchemaElement Element;
1753                         public XsdValidationState ParticleState;
1754                         public XmlSchemaAttribute [] DefaultAttributes;
1755
1756                         // Some of them might be missing (See the spec section 5.3).
1757                         public object SchemaType;
1758
1759                         public object LocalTypeDefinition;
1760
1761                         public object ActualType {
1762                                 get {
1763                                         if (LocalTypeDefinition != null)
1764                                                 return LocalTypeDefinition;
1765                                         else
1766                                                 return SchemaType;
1767                                 }
1768                         }
1769
1770                         public void Clear ()
1771                         {
1772                                 Element = null;
1773                                 SchemaType = null;
1774                                 ParticleState = null;
1775                                 LocalTypeDefinition = null;
1776                         }
1777
1778                         public void PushScope (int depth)
1779                         {
1780                                 contextStack [depth] = this.MemberwiseClone ();
1781                         }
1782
1783                         public void PopScope (int depth)
1784                         {
1785                                 Load (depth);
1786                                 contextStack.Remove (depth + 1);
1787                         }
1788
1789                         public void Load (int depth)
1790                         {
1791                                 Clear ();
1792                                 XsdValidationContext restored = (XsdValidationContext) contextStack [depth];
1793                                 if (restored != null) {
1794                                         this.Element = restored.Element;
1795                                         this.ParticleState = restored.ParticleState;
1796                                         this.SchemaType = restored.SchemaType;
1797                                         this.LocalTypeDefinition = restored.LocalTypeDefinition;
1798                                 }
1799                         }
1800                 }
1801
1802                 /*
1803                 internal class XsdValidityState
1804                 {
1805                         ArrayList currentParticles = new ArrayList ();
1806                         ArrayList occured = new ArrayList ();
1807                         Hashtable xsAllConsumed = new Hashtable ();
1808                         XmlSchemaParticle parciele;
1809                         int particleDepth;
1810
1811                         public XsdValidityState (XmlSchemaParticle particle)
1812                         {
1813                                 this.parciele = particle;
1814                                 currentParticles.Add (particle);
1815                         }
1816
1817                 }
1818                 */
1819         }
1820
1821 }