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
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30 using System;
  31 using System.Collections;
  32 #if NET_2_0
  33 using System.Collections.Generic;
  34 #endif
  35 using System.Collections.Specialized;
  36 using System.IO;
  37 using System.Text;
  38 using System.Xml;
  39 using System.Xml.Schema;
  40 using Mono.Xml;
  41
  42 #if NET_2_0
  43 using ValException = System.Xml.Schema.XmlSchemaValidationException;
  44 #else
  45 using ValException = System.Xml.Schema.XmlSchemaException;
  46 #endif
  47
  48 using QName = System.Xml.XmlQualifiedName;
  49 using ContentProc = System.Xml.Schema.XmlSchemaContentProcessing;
  50 using XsElement = System.Xml.Schema.XmlSchemaElement;
  51 using XsAttribute = System.Xml.Schema.XmlSchemaAttribute;
  52 using ComplexType = System.Xml.Schema.XmlSchemaComplexType;
  53 using SimpleType = System.Xml.Schema.XmlSchemaSimpleType;
  54 using SimpleTypeRest = System.Xml.Schema.XmlSchemaSimpleTypeRestriction;
  55 using SimpleTypeList = System.Xml.Schema.XmlSchemaSimpleTypeList;
  56 using SimpleTypeUnion = System.Xml.Schema.XmlSchemaSimpleTypeUnion;
  57 using XsDatatype = System.Xml.Schema.XmlSchemaDatatype;
  58
  59 namespace Mono.Xml.Schema
  60 {
  61         internal class XsdValidatingReader : XmlReader, IXmlLineInfo, IHasXmlSchemaInfo, IHasXmlParserContext, IXmlNamespaceResolver
  62         {
  63                 static readonly XsAttribute [] emptyAttributeArray =
  64                         new XsAttribute [0];
  65
  66                 XmlReader reader;
  67                 XmlResolver resolver;
  68                 IHasXmlSchemaInfo sourceReaderSchemaInfo;
  69                 IXmlLineInfo readerLineInfo;
  70                 ValidationType validationType;
  71                 XmlSchemaSet schemas = new XmlSchemaSet ();
  72                 bool namespaces = true;
  73
  74 #region ID Constraints
  75                 bool checkIdentity = true;
  76                 XsdIDManager idManager = new XsdIDManager ();
  77 #endregion
  78
  79 #region Key Constraints
  80                 bool checkKeyConstraints = true;
  81                 ArrayList keyTables = new ArrayList ();
  82                 ArrayList currentKeyFieldConsumers;
  83                 ArrayList tmpKeyrefPool;
  84 #endregion
  85                 ArrayList elementQNameStack = new ArrayList ();
  86
  87                 XsdParticleStateManager state = new XsdParticleStateManager ();
  88
  89                 int skipValidationDepth = -1;
  90                 int xsiNilDepth = -1;
  91                 StringBuilder storedCharacters = new StringBuilder ();
  92                 bool shouldValidateCharacters;
  93
  94                 XsAttribute [] defaultAttributes = emptyAttributeArray;
  95                 int currentDefaultAttribute = -1;
  96                 ArrayList defaultAttributesCache = new ArrayList ();
  97                 bool defaultAttributeConsumed;
  98                 object currentAttrType;
  99
 100 #region .ctor
 101                 public XsdValidatingReader (XmlReader reader)
 102                 {
 103                         this.reader = reader;
 104                         readerLineInfo = reader as IXmlLineInfo;
 105                         sourceReaderSchemaInfo = reader as IHasXmlSchemaInfo;
 106                         schemas.ValidationEventHandler += ValidationEventHandler;
 107                 }
 108 #endregion
 109
 110                 public ValidationEventHandler ValidationEventHandler;
 111
 112                 // Private Properties
 113
 114                 private XsdValidationContext Context {
 115                         get { return state.Context; }
 116                 }
 117
 118 #region Key Constraints
 119                 internal ArrayList CurrentKeyFieldConsumers {
 120                         get {
 121                                 if (currentKeyFieldConsumers == null)
 122                                         currentKeyFieldConsumers = new ArrayList ();
 123                                 return currentKeyFieldConsumers;
 124                         }
 125                 }
 126 #endregion
 127
 128                 // Public Non-overrides
 129
 130                 public int XsiNilDepth {
 131                         get { return xsiNilDepth; }
 132                 }
 133
 134                 public bool Namespaces {
 135                         get { return namespaces; }
 136                         set { namespaces = value; }
 137                 }
 138
 139                 // This is required to resolve xsi:schemaLocation
 140                 public XmlResolver XmlResolver {
 141                         set {
 142                                 resolver = value;
 143                         }
 144                 }
 145
 146                 // This should be changed before the first Read() call.
 147                 public XmlSchemaSet Schemas {
 148                         get { return schemas; }
 149                         set {
 150                                 if (ReadState != ReadState.Initial)
 151                                         throw new InvalidOperationException ("Schemas must be set before the first call to Read().");
 152                                 schemas = value;
 153                         }
 154                 }
 155
 156                 public object SchemaType {
 157                         get {
 158                                 if (ReadState != ReadState.Interactive)
 159                                         return null;
 160
 161                                 switch (NodeType) {
 162                                 case XmlNodeType.Element:
 163                                         if (Context.ActualType != null)
 164                                                 return Context.ActualType;
 165                                         else
 166                                                 return SourceReaderSchemaType;
 167                                 case XmlNodeType.Attribute:
 168                                         if (currentAttrType == null) {
 169                                                 ComplexType ct = Context.ActualType as ComplexType;
 170                                                 if (ct != null) {
 171                                                         XsAttribute attdef = ct.AttributeUses [new QName (LocalName, NamespaceURI)] as XsAttribute;
 172                                                         if (attdef != null)
 173                                                                 currentAttrType = attdef.AttributeType;
 174                                                         return currentAttrType;
 175                                                 }
 176                                                 currentAttrType = SourceReaderSchemaType;
 177                                         }
 178                                         return currentAttrType;
 179                                 default:
 180                                         return SourceReaderSchemaType;
 181                                 }
 182                         }
 183                 }
 184
 185                 private object SourceReaderSchemaType {
 186                         get { return this.sourceReaderSchemaInfo != null ? sourceReaderSchemaInfo.SchemaType : null; }
 187                 }
 188
 189                 public ValidationType ValidationType {
 190                         get { return validationType; }
 191                         set {
 192                                 if (ReadState != ReadState.Initial)
 193                                         throw new InvalidOperationException ("ValidationType must be set before reading.");
 194                                 validationType = value;
 195                         }
 196                 }
 197
 198 #if NET_2_0
 199                 IDictionary<string, string>
 200 #else
 201                 IDictionary
 202 #endif
 203                 IXmlNamespaceResolver.GetNamespacesInScope (XmlNamespaceScope scope)
 204                 {
 205                         IXmlNamespaceResolver resolver = reader as IXmlNamespaceResolver;
 206                         if (resolver == null)
 207                                 throw new NotSupportedException ("The input XmlReader does not implement IXmlNamespaceResolver and thus this validating reader cannot collect in-scope namespaces.");
 208                         return resolver.GetNamespacesInScope (scope);
 209                 }
 210
 211                 string IXmlNamespaceResolver.LookupPrefix (string ns)
 212                 {
 213                         IXmlNamespaceResolver resolver = reader as IXmlNamespaceResolver;
 214                         if (resolver == null)
 215                                 throw new NotSupportedException ("The input XmlReader does not implement IXmlNamespaceResolver and thus this validating reader cannot execute namespace prefix lookup.");
 216                         return resolver.LookupPrefix (ns);
 217                 }
 218
 219                 // It is used only for independent XmlReader use, not for XmlValidatingReader.
 220 #if NET_2_0
 221                 [Obsolete]
 222                 public override object ReadTypedValue ()
 223 #else
 224                 public object ReadTypedValue ()
 225 #endif
 226                 {
 227                         object o = XmlSchemaUtil.ReadTypedValue (this,
 228                                 SchemaType, ParserContext.NamespaceManager,
 229                                 storedCharacters);
 230                         storedCharacters.Length = 0;
 231                         return o;
 232                 }
 233
 234                 // Public Overriden Properties
 235
 236                 public override int AttributeCount {
 237                         get {
 238                                 return reader.AttributeCount + defaultAttributes.Length;
 239                         }
 240                 }
 241
 242                 public override string BaseURI {
 243                         get { return reader.BaseURI; }
 244                 }
 245
 246                 // If this class is used to implement XmlValidatingReader,
 247                 // it should be left to DTDValidatingReader. In other cases,
 248                 // it depends on the reader's ability.
 249                 public override bool CanResolveEntity {
 250                         get { return reader.CanResolveEntity; }
 251                 }
 252
 253                 public override int Depth {
 254                         get {
 255                                 if (currentDefaultAttribute < 0)
 256                                         return reader.Depth;
 257                                 if (this.defaultAttributeConsumed)
 258                                         return reader.Depth + 2;
 259                                 return reader.Depth + 1;
 260                         }
 261                 }
 262
 263                 public override bool EOF {
 264                         get { return reader.EOF; }
 265                 }
 266
 267                 public override bool HasValue {
 268                         get {
 269                                 if (currentDefaultAttribute < 0)
 270                                         return reader.HasValue;
 271                                 return true;
 272                         }
 273                 }
 274
 275                 public override bool IsDefault {
 276                         get {
 277                                 if (currentDefaultAttribute < 0)
 278                                         return reader.IsDefault;
 279                                 return true;
 280                         }
 281                 }
 282
 283                 public override bool IsEmptyElement {
 284                         get {
 285                                 if (currentDefaultAttribute < 0)
 286                                         return reader.IsEmptyElement;
 287                                 return false;
 288                         }
 289                 }
 290
 291                 public override string this [int i] {
 292                         get { return GetAttribute (i); }
 293                 }
 294
 295                 public override string this [string name] {
 296                         get { return GetAttribute (name); }
 297                 }
 298
 299                 public override string this [string localName, string ns] {
 300                         get { return GetAttribute (localName, ns); }
 301                 }
 302
 303                 public int LineNumber {
 304                         get { return readerLineInfo != null ? readerLineInfo.LineNumber : 0; }
 305                 }
 306
 307                 public int LinePosition {
 308                         get { return readerLineInfo != null ? readerLineInfo.LinePosition : 0; }
 309                 }
 310
 311                 public override string LocalName {
 312                         get {
 313                                 if (currentDefaultAttribute < 0)
 314                                         return reader.LocalName;
 315                                 if (defaultAttributeConsumed)
 316                                         return String.Empty;
 317                                 return defaultAttributes [currentDefaultAttribute].QualifiedName.Name;
 318                         }
 319                 }
 320
 321                 public override string Name {
 322                         get {
 323                                 if (currentDefaultAttribute < 0)
 324                                         return reader.Name;
 325                                 if (defaultAttributeConsumed)
 326                                         return String.Empty;
 327
 328                                 QName qname = defaultAttributes [currentDefaultAttribute].QualifiedName;
 329                                 string prefix = Prefix;
 330                                 if (prefix == String.Empty)
 331                                         return qname.Name;
 332                                 else
 333                                         return String.Concat (prefix, ":", qname.Name);
 334                         }
 335                 }
 336
 337                 public override string NamespaceURI {
 338                         get {
 339                                 if (currentDefaultAttribute < 0)
 340                                         return reader.NamespaceURI;
 341                                 if (defaultAttributeConsumed)
 342                                         return String.Empty;
 343                                 return defaultAttributes [currentDefaultAttribute].QualifiedName.Namespace;
 344                         }
 345                 }
 346
 347                 public override XmlNameTable NameTable {
 348                         get { return reader.NameTable; }
 349                 }
 350
 351                 public override XmlNodeType NodeType {
 352                         get {
 353                                 if (currentDefaultAttribute < 0)
 354                                         return reader.NodeType;
 355                                 if (defaultAttributeConsumed)
 356                                         return XmlNodeType.Text;
 357                                 return XmlNodeType.Attribute;
 358                         }
 359                 }
 360
 361                 public XmlParserContext ParserContext {
 362                         get { return XmlSchemaUtil.GetParserContext (reader); }
 363                 }
 364
 365                 public override string Prefix {
 366                         get {
 367                                 if (currentDefaultAttribute < 0)
 368                                         return reader.Prefix;
 369                                 if (defaultAttributeConsumed)
 370                                         return String.Empty;
 371                                 QName qname = defaultAttributes [currentDefaultAttribute].QualifiedName;
 372                                 string prefix = this.ParserContext.NamespaceManager.LookupPrefix (qname.Namespace, false);
 373                                 if (prefix == null)
 374                                         return String.Empty;
 375                                 else
 376                                         return prefix;
 377                         }
 378                 }
 379
 380                 public override char QuoteChar {
 381                         get { return reader.QuoteChar; }
 382                 }
 383
 384                 public override ReadState ReadState {
 385                         get { return reader.ReadState; }
 386                 }
 387
 388                 public override string Value {
 389                         get {
 390                                 if (currentDefaultAttribute < 0)
 391                                         return reader.Value;
 392                                 string value = defaultAttributes [currentDefaultAttribute].ValidatedDefaultValue;
 393                                 if (value == null)
 394                                         value = defaultAttributes [currentDefaultAttribute].ValidatedFixedValue;
 395                                 return value;
 396                         }
 397                 }
 398
 399                 public override string XmlLang {
 400                         get {
 401                                 string xmlLang = reader.XmlLang;
 402                                 if (xmlLang != null)
 403                                         return xmlLang;
 404                                 int idx = this.FindDefaultAttribute ("lang", XmlNamespaceManager.XmlnsXml);
 405                                 if (idx < 0)
 406                                         return null;
 407                                 xmlLang = defaultAttributes [idx].ValidatedDefaultValue;
 408                                 if (xmlLang == null)
 409                                         xmlLang = defaultAttributes [idx].ValidatedFixedValue;
 410                                 return xmlLang;
 411                         }
 412                 }
 413
 414                 public override XmlSpace XmlSpace {
 415                         get {
 416                                 XmlSpace space = reader.XmlSpace;
 417                                 if (space != XmlSpace.None)
 418                                         return space;
 419                                 int idx = this.FindDefaultAttribute ("space", XmlNamespaceManager.XmlnsXml);
 420                                 if (idx < 0)
 421                                         return XmlSpace.None;
 422                                 string spaceSpec = defaultAttributes [idx].ValidatedDefaultValue;
 423                                 if (spaceSpec == null)
 424                                         spaceSpec = defaultAttributes [idx].ValidatedFixedValue;
 425                                 return (XmlSpace) Enum.Parse (typeof (XmlSpace), spaceSpec, false);
 426                         }
 427                 }
 428
 429                 // Private Methods
 430
 431                 private void HandleError (string error)
 432                 {
 433                         HandleError (error, null);
 434                 }
 435
 436                 private void HandleError (string error, Exception innerException)
 437                 {
 438                         HandleError (error, innerException, false);
 439                 }
 440
 441                 private void HandleError (string error, Exception innerException, bool isWarning)
 442                 {
 443                         if (ValidationType == ValidationType.None)      // extra quick check
 444                                 return;
 445
 446                         ValException schemaException = new ValException (error,
 447                                         this, this.BaseURI, null, innerException);
 448                         HandleError (schemaException, isWarning);
 449                 }
 450
 451                 private void HandleError (ValException schemaException)
 452                 {
 453                         HandleError (schemaException, false);
 454                 }
 455
 456                 private void HandleError (ValException schemaException, bool isWarning)
 457                 {
 458                         if (ValidationType == ValidationType.None)
 459                                 return;
 460
 461                         ValidationEventArgs e = new ValidationEventArgs (schemaException,
 462                                 schemaException.Message, isWarning ? XmlSeverityType.Warning : XmlSeverityType.Error);
 463
 464                         if (ValidationEventHandler != null)
 465                                 ValidationEventHandler (this, e);
 466
 467                         else if (e.Severity == XmlSeverityType.Error)
 468                                 throw e.Exception;
 469                 }
 470
 471                 private XsElement FindElement (string name, string ns)
 472                 {
 473                         return (XsElement) schemas.GlobalElements [new QName (name, ns)];
 474                 }
 475
 476                 private XmlSchemaType FindType (QName qname)
 477                 {
 478                         return (XmlSchemaType) schemas.GlobalTypes [qname];
 479                 }
 480
 481                 private void ValidateStartElementParticle ()
 482                 {
 483                         if (Context.State == null)
 484                                 return;
 485                         Context.XsiType = null;
 486                         state.CurrentElement = null;
 487                         Context.EvaluateStartElement (reader.LocalName,
 488                                 reader.NamespaceURI);
 489                         if (Context.IsInvalid)
 490                                 HandleError ("Invalid start element: " + reader.NamespaceURI + ":" + reader.LocalName);
 491
 492                         Context.SetElement (state.CurrentElement);
 493                 }
 494
 495                 private void ValidateEndElementParticle ()
 496                 {
 497                         if (Context.State != null) {
 498                                 if (!Context.EvaluateEndElement ()) {
 499                                         HandleError ("Invalid end element: " + reader.Name);
 500                                 }
 501                         }
 502                         state.PopContext ();
 503                 }
 504
 505                 // Utility for missing validation completion related to child items.
 506                 private void ValidateCharacters ()
 507                 {
 508                         if (xsiNilDepth >= 0 && xsiNilDepth < reader.Depth)
 509                                 HandleError ("Element item appeared, while current element context is nil.");
 510
 511                         if (shouldValidateCharacters)
 512                                 storedCharacters.Append (reader.Value);
 513                 }
 514
 515                 // Utility for missing validation completion related to child items.
 516                 private void ValidateEndSimpleContent ()
 517                 {
 518                         if (shouldValidateCharacters)
 519                                 ValidateEndSimpleContentCore ();
 520                         shouldValidateCharacters = false;
 521                         storedCharacters.Length = 0;
 522                 }
 523
 524                 private void ValidateEndSimpleContentCore ()
 525                 {
 526                         if (Context.ActualType == null)
 527                                 return;
 528
 529                         string value = storedCharacters.ToString ();
 530
 531                         if (value.Length == 0) {
 532                                 // 3.3.4 Element Locally Valid (Element) 5.1.2
 533                                 if (Context.Element != null) {
 534                                         if (Context.Element.ValidatedDefaultValue != null)
 535                                                 value = Context.Element.ValidatedDefaultValue;
 536                                 }
 537                         }
 538
 539                         XsDatatype dt = Context.ActualType as XsDatatype;
 540                         SimpleType st = Context.ActualType as SimpleType;
 541                         if (dt == null) {
 542                                 if (st != null) {
 543                                         dt = st.Datatype;
 544                                 } else {
 545                                         ComplexType ct = Context.ActualType as ComplexType;
 546                                         dt = ct.Datatype;
 547                                         switch (ct.ContentType) {
 548                                         case XmlSchemaContentType.ElementOnly:
 549                                         case XmlSchemaContentType.Empty:
 550                                                 if (value.Length > 0)
 551                                                         HandleError ("Character content not allowed.");
 552                                                 break;
 553                                         }
 554                                 }
 555                         }
 556                         if (dt != null) {
 557                                 // 3.3.4 Element Locally Valid (Element) :: 5.2.2.2. Fixed value constraints
 558                                 if (Context.Element != null && Context.Element.ValidatedFixedValue != null)
 559                                         if (value != Context.Element.ValidatedFixedValue)
 560                                                 HandleError ("Fixed value constraint was not satisfied.");
 561                                 AssessStringValid (st, dt, value);
 562                         }
 563
 564 #region Key Constraints
 565                         if (checkKeyConstraints)
 566                                 ValidateSimpleContentIdentity (dt, value);
 567 #endregion
 568
 569                         shouldValidateCharacters = false;
 570                 }
 571
 572                 // 3.14.4 String Valid
 573                 private void AssessStringValid (SimpleType st,
 574                         XsDatatype dt, string value)
 575                 {
 576                         XsDatatype validatedDatatype = dt;
 577                         if (st != null) {
 578                                 string normalized = validatedDatatype.Normalize (value);
 579                                 string [] values;
 580                                 XsDatatype itemDatatype;
 581                                 SimpleType itemSimpleType;
 582                                 switch (st.DerivedBy) {
 583                                 case XmlSchemaDerivationMethod.List:
 584                                         SimpleTypeList listContent = st.Content as SimpleTypeList;
 585                                         values = normalized.Split (XmlChar.WhitespaceChars);
 586                                         itemDatatype = listContent.ValidatedListItemType as XsDatatype;
 587                                         itemSimpleType = listContent.ValidatedListItemType as SimpleType;
 588                                         for (int vi = 0; vi < values.Length; vi++) {
 589                                                 string each = values [vi];
 590                                                 if (each == String.Empty)
 591                                                         continue;
 592                                                 // validate against ValidatedItemType
 593                                                 if (itemDatatype != null) {
 594                                                         try {
 595                                                                 itemDatatype.ParseValue (each, NameTable, ParserContext.NamespaceManager);
 596                                                         } catch (Exception ex) { // FIXME: (wishlist) better exception handling ;-(
 597                                                                 HandleError ("List type value contains one or more invalid values.", ex);
 598                                                                 break;
 599                                                         }
 600                                                 }
 601                                                 else
 602                                                         AssessStringValid (itemSimpleType, itemSimpleType.Datatype, each);
 603                                         }
 604                                         break;
 605                                 case XmlSchemaDerivationMethod.Union:
 606                                         SimpleTypeUnion union = st.Content as SimpleTypeUnion;
 607                                         {
 608                                                 string each = normalized;
 609                                                 // validate against ValidatedItemType
 610                                                 bool passed = false;
 611                                                 foreach (object eachType in union.ValidatedTypes) {
 612                                                         itemDatatype = eachType as XsDatatype;
 613                                                         itemSimpleType = eachType as SimpleType;
 614                                                         if (itemDatatype != null) {
 615                                                                 try {
 616                                                                         itemDatatype.ParseValue (each, NameTable, ParserContext.NamespaceManager);
 617                                                                 } catch (Exception) { // FIXME: (wishlist) better exception handling ;-(
 618                                                                         continue;
 619                                                                 }
 620                                                         }
 621                                                         else {
 622                                                                 try {
 623                                                                         AssessStringValid (itemSimpleType, itemSimpleType.Datatype, each);
 624                                                                 } catch (ValException) {
 625                                                                         continue;
 626                                                                 }
 627                                                         }
 628                                                         passed = true;
 629                                                         break;
 630                                                 }
 631                                                 if (!passed) {
 632                                                         HandleError ("Union type value contains one or more invalid values.");
 633                                                         break;
 634                                                 }
 635                                         }
 636                                         break;
 637                                 case XmlSchemaDerivationMethod.Restriction:
 638                                         SimpleTypeRest str = st.Content as SimpleTypeRest;
 639                                         // facet validation
 640                                         if (str != null) {
 641                                                 /* Don't forget to validate against inherited type's facets
 642                                                  * Could we simplify this by assuming that the basetype will also
 643                                                  * be restriction?
 644                                                  * */
 645                                                  // mmm, will check later.
 646                                                 SimpleType baseType = st.BaseXmlSchemaType as SimpleType;
 647                                                 if (baseType != null) {
 648                                                          AssessStringValid(baseType, dt, normalized);
 649                                                 }
 650                                                 if (!str.ValidateValueWithFacets (normalized, NameTable)) {
 651                                                         HandleError ("Specified value was invalid against the facets.");
 652                                                         break;
 653                                                 }
 654                                         }
 655                                         validatedDatatype = st.Datatype;
 656                                         break;
 657                                 }
 658                         }
 659                         if (validatedDatatype != null) {
 660                                 try {
 661                                         validatedDatatype.ParseValue (value, NameTable, ParserContext.NamespaceManager);
 662                                 } catch (Exception ex) {        // FIXME: (wishlist) It is bad manner ;-(
 663                                         HandleError ("Invalidly typed data was specified.", ex);
 664                                 }
 665                         }
 666                 }
 667
 668                 private object GetXsiType (string name)
 669                 {
 670                         object xsiType = null;
 671                         QName typeQName = QName.Parse (name, this);
 672                         if (typeQName == ComplexType.AnyTypeName)
 673                                 xsiType = ComplexType.AnyType;
 674                         else if (XmlSchemaUtil.IsBuiltInDatatypeName (typeQName))
 675                                 xsiType = XsDatatype.FromName (typeQName);
 676                         else
 677                                 xsiType = FindType (typeQName);
 678                         return xsiType;
 679                 }
 680
 681                 // It is common to ElementLocallyValid::4 and SchemaValidityAssessment::1.2.1.2.4
 682                 private void AssessLocalTypeDerivationOK (object xsiType, object baseType, XmlSchemaDerivationMethod flag)
 683                 {
 684                         XmlSchemaType xsiSchemaType = xsiType as XmlSchemaType;
 685                         ComplexType baseComplexType = baseType as ComplexType;
 686                         ComplexType xsiComplexType = xsiSchemaType as ComplexType;
 687                         if (xsiType != baseType) {
 688                                 // Extracted (not extraneous) check for 3.4.6 TypeDerivationOK.
 689                                 if (baseComplexType != null)
 690                                         flag |= baseComplexType.BlockResolved;
 691                                 if (flag == XmlSchemaDerivationMethod.All) {
 692                                         HandleError ("Prohibited element type substitution.");
 693                                         return;
 694                                 } else if (xsiSchemaType != null && (flag & xsiSchemaType.DerivedBy) != 0) {
 695                                         HandleError ("Prohibited element type substitution.");
 696                                         return;
 697                                 }
 698                         }
 699
 700                         if (xsiComplexType != null)
 701                                 try {
 702                                         xsiComplexType.ValidateTypeDerivationOK (baseType, null, null);
 703                                 } catch (ValException ex) {
 704 //                                      HandleError ("Locally specified schema complex type derivation failed. " + ex.Message, ex);
 705                                         HandleError (ex);
 706                                 }
 707                         else {
 708                                 SimpleType xsiSimpleType = xsiType as SimpleType;
 709                                 if (xsiSimpleType != null) {
 710                                         try {
 711                                                 xsiSimpleType.ValidateTypeDerivationOK (baseType, null, null, true);
 712                                         } catch (ValException ex) {
 713 //                                              HandleError ("Locally specified schema simple type derivation failed. " + ex.Message, ex);
 714                                                 HandleError (ex);
 715                                         }
 716                                 }
 717                                 else if (xsiType is XsDatatype) {
 718                                         // do nothing
 719                                 }
 720                                 else
 721                                         HandleError ("Primitive data type cannot be derived type using xsi:type specification.");
 722                         }
 723                 }
 724
 725                 // Section 3.3.4 of the spec.
 726                 private void AssessStartElementSchemaValidity ()
 727                 {
 728                         // If the reader is inside xsi:nil (and failed
 729                         // on validation), then simply skip its content.
 730                         if (xsiNilDepth >= 0 && xsiNilDepth < reader.Depth)
 731                                 HandleError ("Element item appeared, while current element context is nil.");
 732
 733                         ValidateStartElementParticle ();
 734
 735                         string xsiNilValue = reader.GetAttribute ("nil", XmlSchema.InstanceNamespace);
 736                         if (xsiNilValue != null)
 737                                 xsiNilValue = xsiNilValue.Trim (XmlChar.WhitespaceChars);
 738                         bool isXsiNil = xsiNilValue == "true";
 739                         if (isXsiNil && this.xsiNilDepth < 0)
 740                                 xsiNilDepth = reader.Depth;
 741
 742                         // [Schema Validity Assessment (Element) 1.2]
 743                         // Evaluate "local type definition" from xsi:type.
 744                         // (See spec 3.3.4 Schema Validity Assessment (Element) 1.2.1.2.3.
 745                         // Note that Schema Validity Assessment(Element) 1.2 takes
 746                         // precedence than 1.1 of that.
 747
 748                         string xsiTypeName = reader.GetAttribute ("type", XmlSchema.InstanceNamespace);
 749                         if (xsiTypeName != null) {
 750                                 xsiTypeName = xsiTypeName.Trim (XmlChar.WhitespaceChars);
 751                                 object xsiType = GetXsiType (xsiTypeName);
 752                                 if (xsiType == null)
 753                                         HandleError ("The instance type was not found: " + xsiTypeName + " .");
 754                                 else {
 755                                         XmlSchemaType xsiSchemaType = xsiType as XmlSchemaType;
 756                                         if (xsiSchemaType != null && this.Context.Element != null) {
 757                                                 XmlSchemaType elemBaseType = Context.Element.ElementType as XmlSchemaType;
 758                                                 if (elemBaseType != null && (xsiSchemaType.DerivedBy & elemBaseType.FinalResolved) != 0)
 759                                                         HandleError ("The instance type is prohibited by the type of the context element.");
 760                                                 if (elemBaseType != xsiType && (xsiSchemaType.DerivedBy & this.Context.Element.BlockResolved) != 0)
 761                                                         HandleError ("The instance type is prohibited by the context element.");
 762                                         }
 763                                         ComplexType xsiComplexType = xsiType as ComplexType;
 764                                         if (xsiComplexType != null && xsiComplexType.IsAbstract)
 765                                                 HandleError ("The instance type is abstract: " + xsiTypeName + " .");
 766                                         else {
 767                                                 // If current schema type exists, then this xsi:type must be
 768                                                 // valid extension of that type. See 1.2.1.2.4.
 769                                                 if (Context.Element != null) {
 770                                                         AssessLocalTypeDerivationOK (xsiType, Context.Element.ElementType, Context.Element.BlockResolved);
 771                                                 }
 772                                                 AssessStartElementLocallyValidType (xsiType);   // 1.2.2:
 773                                                 Context.XsiType = xsiType;
 774                                         }
 775                                 }
 776                         }
 777
 778                         // Create Validation Root, if not exist.
 779                         // [Schema Validity Assessment (Element) 1.1]
 780                         if (Context.Element == null) {
 781                                 state.CurrentElement = FindElement (reader.LocalName, reader.NamespaceURI);
 782                                 Context.SetElement (state.CurrentElement);
 783                         }
 784                         if (Context.Element != null) {
 785                                 if (Context.XsiType == null) {
 786                                         AssessElementLocallyValidElement (xsiNilValue); // 1.1.2
 787                                 }
 788                         } else {
 789                                 switch (state.ProcessContents) {
 790                                 case ContentProc.Skip:
 791                                         break;
 792                                 case ContentProc.Lax:
 793                                         break;
 794                                 default:
 795                                         if (xsiTypeName == null &&
 796                                                 (schemas.Contains (reader.NamespaceURI) ||
 797                                                 !schemas.MissedSubComponents (reader.NamespaceURI)))
 798                                                 HandleError ("Element declaration for " + new QName (reader.LocalName, reader.NamespaceURI) + " is missing.");
 799                                         break;
 800                                 }
 801                         }
 802
 803                         state.PushContext ();
 804
 805                         XsdValidationState next = null;
 806                         if (state.ProcessContents == ContentProc.Skip)
 807                                 skipValidationDepth = reader.Depth;
 808                         else {
 809                                 // create child particle state.
 810                                 ComplexType xsComplexType = SchemaType as ComplexType;
 811                                 if (xsComplexType != null)
 812                                         next = state.Create (xsComplexType.ValidatableParticle);
 813                                 else if (state.ProcessContents == ContentProc.Lax)
 814                                         next = state.Create (XmlSchemaAny.AnyTypeContent);
 815                                 else
 816                                         next = state.Create (XmlSchemaParticle.Empty);
 817                         }
 818                         Context.State = next;
 819
 820 #region Key Constraints
 821                         if (checkKeyConstraints) {
 822                                 ValidateKeySelectors ();
 823                                 ValidateKeyFields ();
 824                         }
 825 #endregion
 826
 827                 }
 828
 829                 // 3.3.4 Element Locally Valid (Element)
 830                 private void AssessElementLocallyValidElement (string xsiNilValue)
 831                 {
 832                         XsElement element = Context.Element;
 833                         QName qname = new QName (reader.LocalName, reader.NamespaceURI);
 834                         // 1.
 835                         if (element == null)
 836                                 HandleError ("Element declaration is required for " + qname);
 837                         // 2.
 838                         if (element.ActualIsAbstract)
 839                                 HandleError ("Abstract element declaration was specified for " + qname);
 840                         // 3.1.
 841                         if (!element.ActualIsNillable && xsiNilValue != null)
 842                                 HandleError ("This element declaration is not nillable: " + qname);
 843                         // 3.2.
 844                         // Note that 3.2.1 xsi:nil constraints are to be
 845                         // validated in AssessElementSchemaValidity() and
 846                         // ValidateCharacters().
 847                         else if (xsiNilValue == "true") {
 848                                 if (element.ValidatedFixedValue != null)
 849                                         HandleError ("Schema instance nil was specified, where the element declaration for " + qname + "has fixed value constraints.");
 850                         }
 851                         // 4. xsi:type (it takes precedence than element type)
 852                         string xsiType = reader.GetAttribute ("type", XmlSchema.InstanceNamespace);
 853                         if (xsiType != null) {
 854                                 Context.XsiType = GetXsiType (xsiType);
 855                                 AssessLocalTypeDerivationOK (Context.XsiType, element.ElementType, element.BlockResolved);
 856                         }
 857                         else
 858                                 Context.XsiType = null;
 859
 860                         // 5 Not all things cannot be assessed here.
 861                         // It is common to 5.1 and 5.2
 862                         if (element.ElementType != null)
 863                                 AssessStartElementLocallyValidType (SchemaType);
 864
 865                         // 6. should be out from here.
 866                         // See invokation of AssessStartIdentityConstraints().
 867
 868                         // 7 is going to be validated in Read() (in case of xmlreader's EOF).
 869                 }
 870
 871                 // 3.3.4 Element Locally Valid (Type)
 872                 private void AssessStartElementLocallyValidType (object schemaType)
 873                 {
 874                         if (schemaType == null) {       // 1.
 875                                 HandleError ("Schema type does not exist.");
 876                                 return;
 877                         }
 878                         ComplexType cType = schemaType as ComplexType;
 879                         SimpleType sType = schemaType as SimpleType;
 880                         if (sType != null) {
 881                                 // 3.1.1.
 882                                 while (reader.MoveToNextAttribute ()) {
 883                                         if (reader.NamespaceURI == XmlNamespaceManager.XmlnsXmlns)
 884                                                 continue;
 885                                         if (reader.NamespaceURI != XmlSchema.InstanceNamespace)
 886                                                 HandleError ("Current simple type cannot accept attributes other than schema instance namespace.");
 887                                         switch (reader.LocalName) {
 888                                         case "type":
 889                                         case "nil":
 890                                         case "schemaLocation":
 891                                         case "noNamespaceSchemaLocation":
 892                                                 break;
 893                                         default:
 894                                                 HandleError ("Unknown schema instance namespace attribute: " + reader.LocalName);
 895                                                 break;
 896                                         }
 897                                 }
 898                                 reader.MoveToElement ();
 899                                 // 3.1.2 and 3.1.3 cannot be assessed here.
 900                         } else if (cType != null) {
 901                                 if (cType.IsAbstract) { // 2.
 902                                         HandleError ("Target complex type is abstract.");
 903                                         return;
 904                                 }
 905                                 // 3.2
 906                                 AssessElementLocallyValidComplexType (cType);
 907                         }
 908                 }
 909
 910                 // 3.4.4 Element Locally Valid (Complex Type)
 911                 private void AssessElementLocallyValidComplexType (ComplexType cType)
 912                 {
 913                         // 1.
 914                         if (cType.IsAbstract)
 915                                 HandleError ("Target complex type is abstract.");
 916
 917                         // 2 (xsi:nil and content prohibition)
 918                         // See AssessStartElementSchemaValidity() and ValidateCharacters()
 919
 920                         // 3. attribute uses and
 921                         // 5. wild IDs
 922                         if (reader.MoveToFirstAttribute ()) {
 923                                 do {
 924                                         switch (reader.NamespaceURI) {
 925                                         case"http://www.w3.org/2000/xmlns/":
 926                                         case XmlSchema.InstanceNamespace:
 927                                                 continue;
 928                                         }
 929                                         QName qname = new QName (reader.LocalName, reader.NamespaceURI);
 930                                         // including 3.10.4 Item Valid (Wildcard)
 931                                         XmlSchemaObject attMatch = XmlSchemaUtil.FindAttributeDeclaration (reader.NamespaceURI, schemas, cType, qname);
 932                                         if (attMatch == null)
 933                                                 HandleError ("Attribute declaration was not found for " + qname);
 934                                         XsAttribute attdecl = attMatch as XsAttribute;
 935                                         if (attdecl != null) {
 936                                                 AssessAttributeLocallyValidUse (attdecl);
 937                                                 AssessAttributeLocallyValid (attdecl);
 938                                         } // otherwise anyAttribute or null.
 939                                 } while (reader.MoveToNextAttribute ());
 940                                 reader.MoveToElement ();
 941                         }
 942
 943                         // Collect default attributes.
 944                         // 4.
 945                         foreach (DictionaryEntry entry in cType.AttributeUses) {
 946                                 XsAttribute attr = (XsAttribute) entry.Value;
 947                                 if (reader [attr.QualifiedName.Name, attr.QualifiedName.Namespace] == null) {
 948                                         if (attr.ValidatedUse == XmlSchemaUse.Required &&
 949                                                 attr.ValidatedFixedValue == null)
 950                                                 HandleError ("Required attribute " + attr.QualifiedName + " was not found.");
 951                                         else if (attr.ValidatedDefaultValue != null || attr.ValidatedFixedValue != null)
 952                                                 defaultAttributesCache.Add (attr);
 953                                 }
 954                         }
 955                         if (defaultAttributesCache.Count == 0)
 956                                 defaultAttributes = emptyAttributeArray;
 957                         else
 958                                 defaultAttributes = (XsAttribute [])
 959                                         defaultAttributesCache.ToArray (
 960                                                 typeof (XsAttribute));
 961                         defaultAttributesCache.Clear ();
 962                         // 5. wild IDs was already checked above.
 963                 }
 964
 965                 // 3.2.4 Attribute Locally Valid and 3.4.4
 966                 private void AssessAttributeLocallyValid (XsAttribute attr)
 967                 {
 968                         // 2. - 4.
 969                         if (attr.AttributeType == null)
 970                                 HandleError ("Attribute type is missing for " + attr.QualifiedName);
 971                         XsDatatype dt = attr.AttributeType as XsDatatype;
 972                         if (dt == null)
 973                                 dt = ((SimpleType) attr.AttributeType).Datatype;
 974                         // It is a bit heavy process, so let's omit as long as possible ;-)
 975                         if (dt != SimpleType.AnySimpleType || attr.ValidatedFixedValue != null) {
 976                                 string normalized = dt.Normalize (reader.Value);
 977                                 object parsedValue = null;
 978                                 try {
 979                                         parsedValue = dt.ParseValue (normalized, reader.NameTable, this.ParserContext.NamespaceManager);
 980                                 } catch (Exception ex) { // FIXME: (wishlist) It is bad manner ;-(
 981                                         HandleError ("Attribute value is invalid against its data type " + dt.TokenizedType, ex);
 982                                 }
 983                                 if (attr.ValidatedFixedValue != null && attr.ValidatedFixedValue != normalized) {
 984                                         HandleError ("The value of the attribute " + attr.QualifiedName + " does not match with its fixed value.");
 985                                         parsedValue = dt.ParseValue (attr.ValidatedFixedValue, reader.NameTable, this.ParserContext.NamespaceManager);
 986                                 }
 987 #region ID Constraints
 988                                 if (this.checkIdentity) {
 989                                         string error = idManager.AssessEachAttributeIdentityConstraint (dt, parsedValue, ((QName) elementQNameStack [elementQNameStack.Count - 1]).Name);
 990                                         if (error != null)
 991                                                 HandleError (error);
 992                                 }
 993 #endregion
 994                         }
 995                 }
 996
 997                 private void AssessAttributeLocallyValidUse (XsAttribute attr)
 998                 {
 999                         // This is extra check than spec 3.5.4
1000                         if (attr.ValidatedUse == XmlSchemaUse.Prohibited)
1001                                 HandleError ("Attribute " + attr.QualifiedName + " is prohibited in this context.");
1002                 }
1003
1004                 private void AssessEndElementSchemaValidity ()
1005                 {
1006                         ValidateEndElementParticle ();  // validate against childrens' state.
1007
1008                         ValidateEndSimpleContent ();
1009
1010                         // 3.3.4 Assess ElementLocallyValidElement 5: value constraints.
1011                         // 3.3.4 Assess ElementLocallyValidType 3.1.3. = StringValid(3.14.4)
1012                         // => ValidateEndSimpleContent().
1013
1014 #region Key Constraints
1015                         if (checkKeyConstraints)
1016                                 ValidateEndElementKeyConstraints ();
1017 #endregion
1018
1019                         // Reset xsi:nil, if required.
1020                         if (xsiNilDepth == reader.Depth)
1021                                 xsiNilDepth = -1;
1022                 }
1023
1024 #region Key Constraints
1025                 private void ValidateEndElementKeyConstraints ()
1026                 {
1027                         // Reset Identity constraints.
1028                         for (int i = 0; i < keyTables.Count; i++) {
1029                                 XsdKeyTable seq = this.keyTables [i] as XsdKeyTable;
1030                                 if (seq.StartDepth == reader.Depth) {
1031                                         EndIdentityValidation (seq);
1032                                 } else {
1033                                         for (int k = 0; k < seq.Entries.Count; k++) {
1034                                                 XsdKeyEntry entry = seq.Entries [k] as XsdKeyEntry;
1035                                                 // Remove finished (maybe key not found) entries.
1036                                                 if (entry.StartDepth == reader.Depth) {
1037                                                         if (entry.KeyFound)
1038                                                                 seq.FinishedEntries.Add (entry);
1039                                                         else if (seq.SourceSchemaIdentity is XmlSchemaKey)
1040                                                                 HandleError ("Key sequence is missing.");
1041                                                         seq.Entries.RemoveAt (k);
1042                                                         k--;
1043                                                 }
1044                                                 // Pop validated key depth to find two or more fields.
1045                                                 else {
1046                                                         for (int j = 0; j < entry.KeyFields.Count; j++) {
1047                                                                 XsdKeyEntryField kf = entry.KeyFields [j];
1048                                                                 if (!kf.FieldFound && kf.FieldFoundDepth == reader.Depth) {
1049                                                                         kf.FieldFoundDepth = 0;
1050                                                                         kf.FieldFoundPath = null;
1051                                                                 }
1052                                                         }
1053                                                 }
1054                                         }
1055                                 }
1056                         }
1057                         for (int i = 0; i < keyTables.Count; i++) {
1058                                 XsdKeyTable seq = this.keyTables [i] as XsdKeyTable;
1059                                 if (seq.StartDepth == reader.Depth) {
1060                                         keyTables.RemoveAt (i);
1061                                         i--;
1062                                 }
1063                         }
1064                 }
1065
1066                 // 3.11.4 Identity Constraint Satisfied
1067                 private void ValidateKeySelectors ()
1068                 {
1069                         if (tmpKeyrefPool != null)
1070                                 tmpKeyrefPool.Clear ();
1071                         if (Context.Element != null && Context.Element.Constraints.Count > 0) {
1072                                 // (a) Create new key sequences, if required.
1073                                 for (int i = 0; i < Context.Element.Constraints.Count; i++) {
1074                                         XmlSchemaIdentityConstraint ident = (XmlSchemaIdentityConstraint) Context.Element.Constraints [i];
1075                                         XsdKeyTable seq = CreateNewKeyTable (ident);
1076                                         if (ident is XmlSchemaKeyref) {
1077                                                 if (tmpKeyrefPool == null)
1078                                                         tmpKeyrefPool = new ArrayList ();
1079                                                 tmpKeyrefPool.Add (seq);
1080                                         }
1081                                 }
1082                         }
1083
1084                         // (b) Evaluate current key sequences.
1085                         for (int i = 0; i < keyTables.Count; i++) {
1086                                 XsdKeyTable seq  = (XsdKeyTable) keyTables [i];
1087                                 if (seq.SelectorMatches (this.elementQNameStack, reader.Depth) != null) {
1088                                         // creates and registers new entry.
1089                                         XsdKeyEntry entry = new XsdKeyEntry (seq, reader.Depth, readerLineInfo);
1090                                         seq.Entries.Add (entry);
1091                                 }
1092                         }
1093                 }
1094
1095                 private void ValidateKeyFields ()
1096                 {
1097                         // (c) Evaluate field paths.
1098                         for (int i = 0; i < keyTables.Count; i++) {
1099                                 XsdKeyTable seq  = (XsdKeyTable) keyTables [i];
1100                                 // If possible, create new field entry candidates.
1101                                 for (int j = 0; j < seq.Entries.Count; j++) {
1102                                         try {
1103                                                 ProcessKeyEntry (seq.Entries [j]);
1104                                         } catch (ValException ex) {
1105                                                 HandleError (ex);
1106                                         }
1107                                 }
1108                         }
1109                 }
1110
1111                 private void ProcessKeyEntry (XsdKeyEntry entry)
1112                 {
1113                         bool isNil = XsiNilDepth == Depth;
1114                         entry.ProcessMatch (false, elementQNameStack, this, NameTable, BaseURI, SchemaType, ParserContext.NamespaceManager, readerLineInfo, Depth, null, null, null, isNil, CurrentKeyFieldConsumers);
1115                         if (MoveToFirstAttribute ()) {
1116                                 try {
1117                                         do {
1118                                                 switch (NamespaceURI) {
1119                                                 case XmlNamespaceManager.XmlnsXmlns:
1120                                                 case XmlSchema.InstanceNamespace:
1121                                                         continue;
1122                                                 }
1123                                                 entry.ProcessMatch (true, elementQNameStack, this, NameTable, BaseURI, SchemaType, ParserContext.NamespaceManager, readerLineInfo, Depth, LocalName, NamespaceURI, Value, false, CurrentKeyFieldConsumers);
1124                                         } while (MoveToNextAttribute ());
1125                                 } finally {
1126                                         MoveToElement ();
1127                                 }
1128                         }
1129                 }
1130
1131                 private XsdKeyTable CreateNewKeyTable (XmlSchemaIdentityConstraint ident)
1132                 {
1133                         XsdKeyTable seq = new XsdKeyTable (ident);
1134                         seq.StartDepth = reader.Depth;
1135                         this.keyTables.Add (seq);
1136                         return seq;
1137                 }
1138
1139                 private void ValidateSimpleContentIdentity (
1140                         XmlSchemaDatatype dt, string value)
1141                 {
1142                         // Identity field value
1143                         if (currentKeyFieldConsumers != null) {
1144                                 while (this.currentKeyFieldConsumers.Count > 0) {
1145                                         XsdKeyEntryField field = this.currentKeyFieldConsumers [0] as XsdKeyEntryField;
1146                                         if (field.Identity != null)
1147                                                 HandleError ("Two or more identical field was found. Former value is '" + field.Identity + "' .");
1148                                         object identity = null; // This means empty value
1149                                         if (dt != null) {
1150                                                 try {
1151                                                         identity = dt.ParseValue (value, NameTable, ParserContext.NamespaceManager);
1152                                                 } catch (Exception ex) { // FIXME: (wishlist) This is bad manner ;-(
1153                                                         HandleError ("Identity value is invalid against its data type " + dt.TokenizedType, ex);
1154                                                 }
1155                                         }
1156                                         if (identity == null)
1157                                                 identity = value;
1158
1159                                         if (!field.SetIdentityField (identity, reader.Depth == xsiNilDepth, dt as XsdAnySimpleType, this.Depth, readerLineInfo))
1160                                                 HandleError ("Two or more identical key value was found: '" + value + "' .");
1161                                         this.currentKeyFieldConsumers.RemoveAt (0);
1162                                 }
1163                         }
1164                 }
1165
1166                 private void EndIdentityValidation (XsdKeyTable seq)
1167                 {
1168                         ArrayList errors = null;
1169                         for (int i = 0; i < seq.Entries.Count; i++) {
1170                                 XsdKeyEntry entry = (XsdKeyEntry) seq.Entries [i];
1171                                 if (entry.KeyFound)
1172                                         continue;
1173                                 if (seq.SourceSchemaIdentity is XmlSchemaKey) {
1174                                         if (errors == null)
1175                                                 errors = new ArrayList ();
1176                                         errors.Add ("line " + entry.SelectorLineNumber + "position " + entry.SelectorLinePosition);
1177                                 }
1178                         }
1179                         if (errors != null)
1180                                 HandleError ("Invalid identity constraints were found. Key was not found. "
1181                                         + String.Join (", ", errors.ToArray (typeof (string)) as string []));
1182
1183                         // If it is keyref, then find reference target
1184                         XmlSchemaKeyref xsdKeyref = seq.SourceSchemaIdentity as XmlSchemaKeyref;
1185                         if (xsdKeyref != null)
1186                                 EndKeyrefValidation (seq, xsdKeyref.Target);
1187                 }
1188
1189                 private void EndKeyrefValidation (XsdKeyTable seq, XmlSchemaIdentityConstraint targetIdent)
1190                 {
1191                         for (int i = this.keyTables.Count - 1; i >= 0; i--) {
1192                                 XsdKeyTable target = this.keyTables [i] as XsdKeyTable;
1193                                 if (target.SourceSchemaIdentity != targetIdent)
1194                                         continue;
1195                                 seq.ReferencedKey = target;
1196                                 for (int j = 0; j < seq.FinishedEntries.Count; j++) {
1197                                         XsdKeyEntry entry = (XsdKeyEntry) seq.FinishedEntries [j];
1198                                         for (int k = 0; k < target.FinishedEntries.Count; k++) {
1199                                                 XsdKeyEntry targetEntry = (XsdKeyEntry) target.FinishedEntries [k];
1200                                                 if (entry.CompareIdentity (targetEntry)) {
1201                                                         entry.KeyRefFound = true;
1202                                                         break;
1203                                                 }
1204                                         }
1205                                 }
1206                         }
1207                         if (seq.ReferencedKey == null)
1208                                 HandleError ("Target key was not found.");
1209                         ArrayList errors = null;
1210                         for (int i = 0; i < seq.FinishedEntries.Count; i++) {
1211                                 XsdKeyEntry entry = (XsdKeyEntry) seq.FinishedEntries [i];
1212                                 if (!entry.KeyRefFound) {
1213                                         if (errors == null)
1214                                                 errors = new ArrayList ();
1215                                         errors.Add (" line " + entry.SelectorLineNumber + ", position " + entry.SelectorLinePosition);
1216                                 }
1217                         }
1218                         if (errors != null)
1219                                 HandleError ("Invalid identity constraints were found. Referenced key was not found: "
1220                                         + String.Join (" / ", errors.ToArray (typeof (string)) as string []));
1221                 }
1222 #endregion
1223
1224                 // Overrided Methods
1225
1226                 public override void Close ()
1227                 {
1228                         reader.Close ();
1229                 }
1230
1231                 public override string GetAttribute (int i)
1232                 {
1233                         switch (reader.NodeType) {
1234                         case XmlNodeType.XmlDeclaration:
1235                         case XmlNodeType.DocumentType:
1236                                 return reader.GetAttribute (i);
1237                         }
1238
1239                         if (reader.AttributeCount > i)
1240                                 reader.GetAttribute (i);
1241                         int defIdx = i - reader.AttributeCount;
1242                         if (i < AttributeCount)
1243                                 return defaultAttributes [defIdx].DefaultValue;
1244
1245                         throw new ArgumentOutOfRangeException ("i", i, "Specified attribute index is out of range.");
1246                 }
1247
1248                 public override string GetAttribute (string name)
1249                 {
1250                         switch (reader.NodeType) {
1251                         case XmlNodeType.XmlDeclaration:
1252                         case XmlNodeType.DocumentType:
1253                                 return reader.GetAttribute (name);
1254                         }
1255
1256                         string value = reader.GetAttribute (name);
1257                         if (value != null)
1258                                 return value;
1259
1260                         QName qname = SplitQName (name);
1261                         return GetDefaultAttribute (qname.Name, qname.Namespace);
1262                 }
1263
1264                 private QName SplitQName (string name)
1265                 {
1266                         if (!XmlChar.IsName (name))
1267                                 throw new ArgumentException ("Invalid name was specified.", "name");
1268
1269                         Exception ex = null;
1270                         QName qname = XmlSchemaUtil.ToQName (reader, name, out ex);
1271                         if (ex != null)
1272                                 return QName.Empty;
1273                         else
1274                                 return qname;
1275                 }
1276
1277                 public override string GetAttribute (string localName, string ns)
1278                 {
1279                         switch (reader.NodeType) {
1280                         case XmlNodeType.XmlDeclaration:
1281                         case XmlNodeType.DocumentType:
1282                                 return reader.GetAttribute (localName, ns);
1283                         }
1284
1285                         string value = reader.GetAttribute (localName, ns);
1286                         if (value != null)
1287                                 return value;
1288
1289                         return GetDefaultAttribute (localName, ns);
1290                 }
1291
1292                 private string GetDefaultAttribute (string localName, string ns)
1293                 {
1294                         int idx = this.FindDefaultAttribute (localName, ns);
1295                         if (idx < 0)
1296                                 return null;
1297                         string value = defaultAttributes [idx].ValidatedDefaultValue;
1298                         if (value == null)
1299                                 value = defaultAttributes [idx].ValidatedFixedValue;
1300                         return value;
1301                 }
1302
1303                 private int FindDefaultAttribute (string localName, string ns)
1304                 {
1305                         for (int i = 0; i < this.defaultAttributes.Length; i++) {
1306                                 XsAttribute attr = defaultAttributes [i];
1307                                 if (attr.QualifiedName.Name == localName &&
1308                                         (ns == null || attr.QualifiedName.Namespace == ns))
1309                                         return i;
1310                         }
1311                         return -1;
1312                 }
1313
1314                 public bool HasLineInfo ()
1315                 {
1316                         return readerLineInfo != null && readerLineInfo.HasLineInfo ();
1317                 }
1318
1319                 public override string LookupNamespace (string prefix)
1320                 {
1321                         return reader.LookupNamespace (prefix);
1322                 }
1323
1324                 public override void MoveToAttribute (int i)
1325                 {
1326                         switch (reader.NodeType) {
1327                         case XmlNodeType.XmlDeclaration:
1328                         case XmlNodeType.DocumentType:
1329                                 reader.MoveToAttribute (i);
1330                                 return;
1331                         }
1332
1333                         currentAttrType = null;
1334                         if (i < reader.AttributeCount) {
1335                                 reader.MoveToAttribute (i);
1336                                 this.currentDefaultAttribute = -1;
1337                                 this.defaultAttributeConsumed = false;
1338                         }
1339
1340                         if (i < AttributeCount) {
1341                                 this.currentDefaultAttribute = i - reader.AttributeCount;
1342                                 this.defaultAttributeConsumed = false;
1343                         }
1344                         else
1345                                 throw new ArgumentOutOfRangeException ("i", i, "Attribute index is out of range.");
1346                 }
1347
1348                 public override bool MoveToAttribute (string name)
1349                 {
1350                         switch (reader.NodeType) {
1351                         case XmlNodeType.XmlDeclaration:
1352                         case XmlNodeType.DocumentType:
1353                                 return reader.MoveToAttribute (name);
1354                         }
1355
1356                         currentAttrType = null;
1357                         bool b = reader.MoveToAttribute (name);
1358                         if (b) {
1359                                 this.currentDefaultAttribute = -1;
1360                                 this.defaultAttributeConsumed = false;
1361                                 return true;
1362                         }
1363
1364                         return MoveToDefaultAttribute (name, null);
1365                 }
1366
1367                 public override bool MoveToAttribute (string localName, string ns)
1368                 {
1369                         switch (reader.NodeType) {
1370                         case XmlNodeType.XmlDeclaration:
1371                         case XmlNodeType.DocumentType:
1372                                 return reader.MoveToAttribute (localName, ns);
1373                         }
1374
1375                         currentAttrType = null;
1376                         bool b = reader.MoveToAttribute (localName, ns);
1377                         if (b) {
1378                                 this.currentDefaultAttribute = -1;
1379                                 this.defaultAttributeConsumed = false;
1380                                 return true;
1381                         }
1382
1383                         return MoveToDefaultAttribute (localName, ns);
1384                 }
1385
1386                 private bool MoveToDefaultAttribute (string localName, string ns)
1387                 {
1388                         int idx = this.FindDefaultAttribute (localName, ns);
1389                         if (idx < 0)
1390                                 return false;
1391                         currentDefaultAttribute = idx;
1392                         defaultAttributeConsumed = false;
1393                         return true;
1394                 }
1395
1396                 public override bool MoveToElement ()
1397                 {
1398                         currentDefaultAttribute = -1;
1399                         defaultAttributeConsumed = false;
1400                         currentAttrType = null;
1401                         return reader.MoveToElement ();
1402                 }
1403
1404                 public override bool MoveToFirstAttribute ()
1405                 {
1406                         switch (reader.NodeType) {
1407                         case XmlNodeType.XmlDeclaration:
1408                         case XmlNodeType.DocumentType:
1409                                 return reader.MoveToFirstAttribute ();
1410                         }
1411
1412                         currentAttrType = null;
1413                         if (reader.AttributeCount > 0) {
1414                                 bool b = reader.MoveToFirstAttribute ();
1415                                 if (b) {
1416                                         currentDefaultAttribute = -1;
1417                                         defaultAttributeConsumed = false;
1418                                 }
1419                                 return b;
1420                         }
1421
1422                         if (this.defaultAttributes.Length > 0) {
1423                                 currentDefaultAttribute = 0;
1424                                 defaultAttributeConsumed = false;
1425                                 return true;
1426                         }
1427                         else
1428                                 return false;
1429                 }
1430
1431                 public override bool MoveToNextAttribute ()
1432                 {
1433                         switch (reader.NodeType) {
1434                         case XmlNodeType.XmlDeclaration:
1435                         case XmlNodeType.DocumentType:
1436                                 return reader.MoveToNextAttribute ();
1437                         }
1438
1439                         currentAttrType = null;
1440                         if (currentDefaultAttribute >= 0) {
1441                                 if (defaultAttributes.Length == currentDefaultAttribute + 1)
1442                                         return false;
1443                                 currentDefaultAttribute++;
1444                                 defaultAttributeConsumed = false;
1445                                 return true;
1446                         }
1447
1448                         bool b = reader.MoveToNextAttribute ();
1449                         if (b) {
1450                                 currentDefaultAttribute = -1;
1451                                 defaultAttributeConsumed = false;
1452                                 return true;
1453                         }
1454
1455                         if (defaultAttributes.Length > 0) {
1456                                 currentDefaultAttribute = 0;
1457                                 defaultAttributeConsumed = false;
1458                                 return true;
1459                         }
1460                         else
1461                                 return false;
1462                 }
1463
1464                 private XmlSchema ReadExternalSchema (string uri)
1465                 {
1466                         Uri absUri = resolver.ResolveUri ((BaseURI != "" ? new Uri (BaseURI) : null), uri);
1467                         string absUriString = absUri != null ? absUri.ToString () : String.Empty;
1468                         XmlTextReader xtr = null;
1469                         try {
1470                                 xtr = new XmlTextReader (absUriString,
1471                                         (Stream) resolver.GetEntity (
1472                                                 absUri, null, typeof (Stream)),
1473                                         NameTable);
1474                                 return XmlSchema.Read (
1475                                         xtr, ValidationEventHandler);
1476                         } finally {
1477                                 if (xtr != null)
1478                                         xtr.Close ();
1479                         }
1480                 }
1481
1482                 private void ExamineAdditionalSchema ()
1483                 {
1484                         if (resolver == null)
1485                                 return;
1486                         XmlSchema schema = null;
1487                         string schemaLocation = reader.GetAttribute ("schemaLocation", XmlSchema.InstanceNamespace);
1488                         bool schemaAdded = false;
1489                         if (schemaLocation != null) {
1490                                 string [] tmp = null;
1491                                 try {
1492                                         schemaLocation = XsDatatype.FromName ("token", XmlSchema.Namespace).Normalize (schemaLocation);
1493                                         tmp = schemaLocation.Split (XmlChar.WhitespaceChars);
1494                                 } catch (Exception ex) {
1495                                         if (schemas.Count == 0)
1496                                                 HandleError ("Invalid schemaLocation attribute format.", ex, true);
1497                                         tmp = new string [0];
1498                                 }
1499                                 if (tmp.Length % 2 != 0)
1500                                         if (schemas.Count == 0)
1501                                                 HandleError ("Invalid schemaLocation attribute format.");
1502                                 for (int i = 0; i < tmp.Length; i += 2) {
1503                                         try {
1504                                                 schema = ReadExternalSchema (tmp [i + 1]);
1505                                         } catch (Exception) { // FIXME: (wishlist) It is bad manner ;-(
1506                                                 if (!schemas.Contains (tmp [i]))
1507                                                         HandleError (String.Format ("Could not resolve schema location URI: {0}",
1508                                                                 i + 1 < tmp.Length ? tmp [i + 1] : String.Empty), null, true);
1509                                                 continue;
1510                                         }
1511                                         if (schema.TargetNamespace == null)
1512                                                 schema.TargetNamespace = tmp [i];
1513                                         else if (schema.TargetNamespace != tmp [i])
1514                                                 HandleError ("Specified schema has different target namespace.");
1515                                 }
1516                         }
1517                         if (schema != null) {
1518                                 if (!schemas.Contains (schema.TargetNamespace)) {
1519                                         schemaAdded = true;
1520                                         schemas.Add (schema);
1521                                 }
1522                         }
1523                         schema = null;
1524                         string noNsSchemaLocation = reader.GetAttribute ("noNamespaceSchemaLocation", XmlSchema.InstanceNamespace);
1525                         if (noNsSchemaLocation != null) {
1526                                 try {
1527                                         schema = ReadExternalSchema (noNsSchemaLocation);
1528                                 } catch (Exception) { // FIXME: (wishlist) It is bad manner ;-(
1529                                         if (schemas.Count != 0)
1530                                                 HandleError ("Could not resolve schema location URI: " + noNsSchemaLocation, null, true);
1531                                 }
1532                                 if (schema != null && schema.TargetNamespace != null)
1533                                         HandleError ("Specified schema has different target namespace.");
1534                         }
1535                         if (schema != null) {
1536                                 if (!schemas.Contains (schema.TargetNamespace)) {
1537                                         schemaAdded = true;
1538                                         schemas.Add (schema);
1539                                 }
1540                         }
1541                         // FIXME: should call Reprocess()?
1542                         if (schemaAdded)
1543                                 schemas.Compile ();
1544                 }
1545
1546                 public override bool Read ()
1547                 {
1548                         currentDefaultAttribute = -1;
1549                         defaultAttributeConsumed = false;
1550                         currentAttrType = null;
1551 #region ID Constraints
1552                         if (this.checkIdentity)
1553                                 idManager.OnStartElement ();
1554 #endregion
1555                         defaultAttributes = emptyAttributeArray;
1556
1557                         bool result = reader.Read ();
1558 #region ID Constraints
1559                         // 3.3.4 ElementLocallyValidElement 7 = Root Valid.
1560                         if (!result && this.checkIdentity &&
1561                                 idManager.HasMissingIDReferences ())
1562                                 HandleError ("There are missing ID references: " + idManager.GetMissingIDString ());
1563 #endregion
1564
1565                         // FIXME: schemaLocation could be specified
1566                         // at any Depth.
1567                         if (reader.Depth == 0 &&
1568                                 reader.NodeType == XmlNodeType.Element)
1569                                 ExamineAdditionalSchema ();
1570                         if (schemas.Count == 0)
1571                                 return result;
1572                         if (!schemas.IsCompiled)
1573                                 schemas.Compile ();
1574
1575                         switch (reader.NodeType) {
1576                         case XmlNodeType.Element:
1577 #region Key Constraints
1578                                 if (checkKeyConstraints)
1579                                         this.elementQNameStack.Add (new QName (reader.LocalName, reader.NamespaceURI));
1580 #endregion
1581
1582                                 // If there is no schema information, then no validation is performed.
1583                                 if (skipValidationDepth < 0 || reader.Depth <= skipValidationDepth) {
1584                                         ValidateEndSimpleContent ();
1585                                         AssessStartElementSchemaValidity ();
1586                                 }
1587
1588                                 if (reader.IsEmptyElement)
1589                                         goto case XmlNodeType.EndElement;
1590                                 else
1591                                         shouldValidateCharacters = true;
1592                                 break;
1593                         case XmlNodeType.EndElement:
1594                                 if (reader.Depth == skipValidationDepth)
1595                                         skipValidationDepth = -1;
1596                                 else if (skipValidationDepth < 0 || reader.Depth <= skipValidationDepth)
1597                                         AssessEndElementSchemaValidity ();
1598
1599                                 if (checkKeyConstraints)
1600                                         elementQNameStack.RemoveAt (elementQNameStack.Count - 1);
1601                                 break;
1602
1603                         case XmlNodeType.CDATA:
1604                         case XmlNodeType.SignificantWhitespace:
1605                         case XmlNodeType.Text:
1606                                 // FIXME: does this check make sense?
1607                                 ComplexType ct = Context.ActualType as ComplexType;
1608                                 if (ct != null && storedCharacters.Length > 0) {
1609                                         switch (ct.ContentType) {
1610                                         case XmlSchemaContentType.ElementOnly:
1611                                         case XmlSchemaContentType.Empty:
1612                                                 HandleError ("Not allowed character content was found.");
1613                                                 break;
1614                                         }
1615                                 }
1616
1617                                 ValidateCharacters ();
1618                                 break;
1619                         }
1620
1621                         return result;
1622                 }
1623
1624                 public override bool ReadAttributeValue ()
1625                 {
1626                         if (currentDefaultAttribute < 0)
1627                                 return reader.ReadAttributeValue ();
1628
1629                         if (this.defaultAttributeConsumed)
1630                                 return false;
1631
1632                         defaultAttributeConsumed = true;
1633                         return true;
1634                 }
1635
1636 #if NET_1_0
1637                 public override string ReadInnerXml ()
1638                 {
1639                         // MS.NET 1.0 has a serious bug here. It skips validation.
1640                         return reader.ReadInnerXml ();
1641                 }
1642
1643                 public override string ReadOuterXml ()
1644                 {
1645                         // MS.NET 1.0 has a serious bug here. It skips validation.
1646                         return reader.ReadOuterXml ();
1647                 }
1648 #endif
1649
1650                 // XmlReader.ReadString() should call derived this.Read().
1651                 public override string ReadString ()
1652                 {
1653 #if NET_1_0
1654                         return reader.ReadString ();
1655 #else
1656                         return base.ReadString ();
1657 #endif
1658                 }
1659
1660                 // This class itself does not have this feature.
1661                 public override void ResolveEntity ()
1662                 {
1663                         reader.ResolveEntity ();
1664                 }
1665         }
1666
1667         internal class XsdValidationContext
1668         {
1669                 public XsdValidationContext ()
1670                 {
1671                 }
1672
1673                 // Some of them might be missing (See the spec section 5.3, and also 3.3.4).
1674                 public XsElement Element;
1675                 public object XsiType; // xsi:type
1676                 internal XsdValidationState State;
1677
1678                 // Note that it represents current element's type.
1679                 public object ActualType {
1680                         get {
1681                                 if (XsiType != null)
1682                                         return XsiType;
1683                                 else
1684                                         return Element != null ? Element.ElementType : null;
1685                         }
1686                 }
1687
1688 #if NET_2_0
1689                 public XmlSchemaType ActualSchemaType {
1690                         get {
1691                                 object at = ActualType;
1692                                 if (at == null)
1693                                         return null;
1694                                 XmlSchemaType st = at as XmlSchemaType;
1695                                 if (st == null)
1696                                         st = XmlSchemaType.GetBuiltInSimpleType (
1697                                         ((XmlSchemaDatatype) at).TypeCode);
1698                                 return st;
1699                         }
1700                 }
1701 #endif
1702
1703                 public bool IsInvalid {
1704                         get { return State == XsdValidationState.Invalid; }
1705                 }
1706
1707                 public object Clone ()
1708                 {
1709                         return MemberwiseClone ();
1710                 }
1711
1712                 public void EvaluateStartElement (
1713                         string localName, string ns)
1714                 {
1715                         State = State.EvaluateStartElement (localName, ns);
1716                 }
1717
1718                 public bool EvaluateEndElement ()
1719                 {
1720                         return State.EvaluateEndElement ();
1721                 }
1722
1723                 public void SetElement (XsElement element)
1724                 {
1725                         Element = element;
1726                 }
1727         }
1728
1729         internal class XsdIDManager
1730         {
1731                 public XsdIDManager ()
1732                 {
1733                 }
1734
1735                 Hashtable idList = new Hashtable ();
1736                 ArrayList missingIDReferences;
1737                 string thisElementId;
1738
1739                 private ArrayList MissingIDReferences {
1740                         get {
1741                                 if (missingIDReferences == null)
1742                                         missingIDReferences = new ArrayList ();
1743                                 return missingIDReferences;
1744                         }
1745                 }
1746
1747                 public void OnStartElement ()
1748                 {
1749                         thisElementId = null;
1750                 }
1751
1752                 // 3.4.4-5 wild IDs
1753                 public string AssessEachAttributeIdentityConstraint (
1754                         XsDatatype dt, object parsedValue, string elementName)
1755                 {
1756                         // Validate identity constraints.
1757                         string str = parsedValue as string;
1758                         switch (dt.TokenizedType) {
1759                         case XmlTokenizedType.ID:
1760                                 if (thisElementId != null)
1761                                         return "ID type attribute was already assigned in the containing element.";
1762                                 else
1763                                         thisElementId = str;
1764                                 if (idList.ContainsKey (str))
1765                                         return "Duplicate ID value was found.";
1766                                 else
1767                                         idList.Add (str, elementName);
1768                                 if (MissingIDReferences.Contains (str))
1769                                         MissingIDReferences.Remove (str);
1770                                 break;
1771                         case XmlTokenizedType.IDREF:
1772                                 if (!idList.Contains (str))
1773                                         MissingIDReferences.Add (str);
1774                                 break;
1775                         case XmlTokenizedType.IDREFS:
1776                                 string [] idrefs = (string []) parsedValue;
1777                                 for (int i = 0; i < idrefs.Length; i++) {
1778                                         string id = idrefs [i];
1779                                         if (!idList.Contains (id))
1780                                                 MissingIDReferences.Add (id);
1781                                 }
1782                                 break;
1783                         }
1784                         return null;
1785                 }
1786
1787                 public object FindID (string name)
1788                 {
1789                         return idList [name];
1790                 }
1791
1792                 public bool HasMissingIDReferences ()
1793                 {
1794                         return missingIDReferences != null
1795                                 && missingIDReferences.Count > 0;
1796                 }
1797
1798                 public string GetMissingIDString ()
1799                 {
1800                         return String.Join (" ",
1801                                 MissingIDReferences.ToArray (typeof (string))
1802                                         as string []);
1803                 }
1804         }
1805 }