summaryrefslogtreecommitdiffstats
path: root/src/xmlpatterns/schema/qxsdvalidatinginstancereader.cpp
blob: 7552c410cdcd41f44ec99a760d4f3c182f60f968 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
/****************************************************************************
**
** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtXmlPatterns of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qxsdvalidatinginstancereader_p.h"

#include "qabstractdatetime_p.h"
#include "qacceltreeresourceloader_p.h"
#include "qbase64binary_p.h"
#include "qboolean_p.h"
#include "qcommonnamespaces_p.h"
#include "qderivedinteger_p.h"
#include "qduration_p.h"
#include "qgenericstaticcontext_p.h"
#include "qhexbinary_p.h"
#include "qnamespaceresolver_p.h"
#include "qpatternplatform_p.h"
#include "qqnamevalue_p.h"
#include "qsourcelocationreflection_p.h"
#include "qvaluefactory_p.h"
#include "qxmlnamepool.h"
#include "qxmlquery_p.h"
#include "qxmlschema_p.h"
#include "qxsdschemahelper_p.h"
#include "qxsdschemamerger_p.h"
#include "qxsdstatemachine_p.h"
#include "qxsdstatemachinebuilder_p.h"
#include "qxsdtypechecker_p.h"

#include "qxsdschemadebugger_p.h"

#include <QtCore/QFile>
#include <QtXmlPatterns/QXmlQuery>
#include <QtXmlPatterns/QXmlResultItems>

QT_BEGIN_NAMESPACE

using namespace QPatternist;

namespace QPatternist
{
    template <>
    template <>
    bool XsdStateMachine<XsdTerm::Ptr>::inputEqualsTransition<QXmlName>(QXmlName name, XsdTerm::Ptr term) const
    {
        if (term->isElement()) {
            return (XsdElement::Ptr(term)->name(m_namePool) == name);
        } else if (term->isWildcard()) {
            // wildcards using XsdWildcard::absentNamespace, so we have to fix that here
            if (name.namespaceURI() == StandardNamespaces::empty) {
                name.setNamespaceURI(m_namePool->allocateNamespace(XsdWildcard::absentNamespace()));
            }

            return XsdSchemaHelper::wildcardAllowsExpandedName(name, XsdWildcard::Ptr(term), m_namePool);
        }

        return false;
    }
}

XsdValidatingInstanceReader::XsdValidatingInstanceReader(XsdValidatedXmlNodeModel *model, const QUrl &documentUri, const XsdSchemaContext::Ptr &context)
    : XsdInstanceReader(model, context)
    , m_model(model)
    , m_namePool(m_context->namePool())
    , m_xsiNilName(m_namePool->allocateQName(CommonNamespaces::XSI, QLatin1String("nil")))
    , m_xsiTypeName(m_namePool->allocateQName(CommonNamespaces::XSI, QLatin1String("type")))
    , m_xsiSchemaLocationName(m_namePool->allocateQName(CommonNamespaces::XSI, QLatin1String("schemaLocation")))
    , m_xsiNoNamespaceSchemaLocationName(m_namePool->allocateQName(CommonNamespaces::XSI, QLatin1String("noNamespaceSchemaLocation")))
    , m_documentUri(documentUri)
{
    m_idRefsType = m_context->schemaTypeFactory()->createSchemaType(m_namePool->allocateQName(CommonNamespaces::WXS, QLatin1String("IDREFS")));
}

void XsdValidatingInstanceReader::addSchema(const XsdSchema::Ptr &schema, const QUrl &locationUrl)
{
    if (!m_mergedSchemas.contains(locationUrl)) {
        m_mergedSchemas.insert(locationUrl, QStringList() << schema->targetNamespace());
    } else {
        QStringList &targetNamespaces = m_mergedSchemas[locationUrl];
        if (targetNamespaces.contains(schema->targetNamespace()))
            return;

        targetNamespaces.append(schema->targetNamespace());
    }

    const XsdSchemaMerger merger(m_schema, schema);
    m_schema = merger.mergedSchema();
/*
    XsdSchemaDebugger dbg(m_namePool);
    dbg.dumpSchema(m_schema);
*/
}

bool XsdValidatingInstanceReader::read()
{
    while (!atEnd()) {
        readNext();

        if (isEndElement())
            return true;

        if (isStartElement()) {
            const QXmlName elementName = name();
            const QXmlItem currentItem = item();
            bool hasStateMachine = false;
            XsdElement::Ptr processedElement;

            if (!validate(hasStateMachine, processedElement))
                return false;

            read();

            if (processedElement) { // for wildcard with 'skip' we have no element
                m_model->setAssignedElement(currentItem.toNodeModelIndex(), processedElement);

                // check identity constraints after all child nodes have been
                // validated, so that we know there assigned types
                validateIdentityConstraint(processedElement, currentItem);
            }

            if (!m_stateMachines.isEmpty() && hasStateMachine) {
                if (!m_stateMachines.top().inEndState()) {
                    error(QtXmlPatterns::tr("Element %1 is missing child element.").arg(formatKeyword(m_namePool->displayName(elementName))));
                    return false;
                }
                m_stateMachines.pop();
            }
        }
    }

    // final validations

    // check IDREF occurrences
    const QStringList ids = m_model->idIdRefBindingIds();
    QSetIterator<QString> it(m_idRefs);
    while (it.hasNext()) {
        const QString id = it.next();
        if (!ids.contains(id)) {
            error(QtXmlPatterns::tr("There is one IDREF value with no corresponding ID: %1.").arg(formatKeyword(id)));
            return false;
        }
    }

    return true;
}

void XsdValidatingInstanceReader::error(const QString &msg) const
{
    m_context.data()->error(msg, XsdSchemaContext::XSDError, sourceLocation());
}

bool XsdValidatingInstanceReader::loadSchema(const QString &targetNamespace, const QUrl &location)
{
    const AutoPtr<QNetworkReply> reply(AccelTreeResourceLoader::load(location, m_context->networkAccessManager(),
                                                                     m_context, AccelTreeResourceLoader::ContinueOnError));
    if (!reply)
        return true;

    // we have to create a separated schema context here, that however shares the type factory
    XsdSchemaContext::Ptr context(new XsdSchemaContext(m_namePool));
    context->m_schemaTypeFactory = m_context->m_schemaTypeFactory;

    QXmlSchemaPrivate schema(context);
    schema.load(reply.data(), location, targetNamespace);
    if (!schema.isValid()) {
        error(QtXmlPatterns::tr("Loaded schema file is invalid."));
        return false;
    }

    addSchema(schema.m_schemaParserContext->schema(), location);

    return true;
}

bool XsdValidatingInstanceReader::validate(bool &hasStateMachine, XsdElement::Ptr &processedElement)
{
    // first check if a custom schema is defined
    if (hasAttribute(m_xsiSchemaLocationName)) {
        const QString schemaLocation = attribute(m_xsiSchemaLocationName);
        const QStringList parts = schemaLocation.split(QLatin1Char(' '), QString::SkipEmptyParts);
        if ((parts.count()%2) == 1) {
            error(QtXmlPatterns::tr("%1 contains invalid data.").arg(formatKeyword(m_namePool, m_xsiSchemaLocationName)));
            return false;
        }

        for (int i = 0; i < parts.count(); i += 2) {
            const QString identifier = QString::fromLatin1("%1 %2").arg(parts.at(i)).arg(parts.at(i + 1));
            if (m_processedSchemaLocations.contains(identifier))
                continue;
            else
                m_processedSchemaLocations.insert(identifier);

            // check constraint 4) from http://www.w3.org/TR/xmlschema-1/#schema-loc (only valid for XML Schema 1.0?)
            if (m_processedNamespaces.contains(parts.at(i))) {
                error(QtXmlPatterns::tr("xsi:schemaLocation namespace %1 has already appeared earlier in the instance document.").arg(formatKeyword(parts.at(i))));
                return false;
            }

            QUrl url(parts.at(i + 1));
            if (url.isRelative()) {
                Q_ASSERT(m_documentUri.isValid());

                url = m_documentUri.resolved(url);
            }

            loadSchema(parts.at(i), url);
        }
    }

    if (hasAttribute(m_xsiNoNamespaceSchemaLocationName)) {
        const QString schemaLocation = attribute(m_xsiNoNamespaceSchemaLocationName);

        if (!m_processedSchemaLocations.contains(schemaLocation)) {
            m_processedSchemaLocations.insert(schemaLocation);

            if (m_processedNamespaces.contains(QString())) {
                error(QtXmlPatterns::tr("xsi:noNamespaceSchemaLocation cannot appear after the first no-namespace element or attribute."));
                return false;
            }

            QUrl url(schemaLocation);
            if (url.isRelative()) {
                Q_ASSERT(m_documentUri.isValid());

                url = m_documentUri.resolved(url);
            }

            loadSchema(QString(), url);
        }
    }

    m_processedNamespaces.insert(m_namePool->stringForNamespace(name().namespaceURI()));

    if (!m_schema) {
        error(QtXmlPatterns::tr("No schema defined for validation."));
        return false;
    }

    // check if we are 'inside' a type definition
    if (m_stateMachines.isEmpty()) {
        // find out the type of the top-level element
        XsdElement::Ptr element = elementByName(name());
        if (!element) {
            if (!hasAttribute(m_xsiTypeName)) {
                error(QtXmlPatterns::tr("No definition for element %1 available.").arg(formatKeyword(m_namePool, name())));
                return false;
            }

            // This instance document has an element with no definition in the schema
            // but an explicitly given type, that is fine according to the spec.
            // We will create an element definition manually here and continue the
            // normal validation process
            element = XsdElement::Ptr(new XsdElement());
            element->setName(name());
            element->setIsAbstract(false);
            element->setIsNillable(hasAttribute(m_xsiNilName));

            const QString type = qNameAttribute(m_xsiTypeName);
            const QXmlName typeName = convertToQName(type);

            const SchemaType::Ptr elementType = typeByName(typeName);
            if (!elementType) {
                error(QtXmlPatterns::tr("Specified type %1 is not known to the schema.").arg(formatType(m_namePool, typeName)));
                return false;
            }
            element->setType(elementType);
        }

        // rememeber the element we process
        processedElement = element;

        if (!validateElement(element, hasStateMachine)) {
            return false;
        }

    } else {
        if (!m_stateMachines.top().proceed<QXmlName>(name())) {
            error(QtXmlPatterns::tr("Element %1 is not defined in this scope.").arg(formatKeyword(m_namePool, name())));
            return false;
        }

        const XsdTerm::Ptr term = m_stateMachines.top().lastTransition();
        if (term->isElement()) {
            const XsdElement::Ptr element(term);

            // rememeber the element we process
            processedElement = element;

            if (!validateElement(element, hasStateMachine))
                return false;

        } else {
            const XsdWildcard::Ptr wildcard(term);
            if (wildcard->processContents() != XsdWildcard::Skip) {
                XsdElement::Ptr elementDeclaration = elementByName(name());
                if (!elementDeclaration) {
                    if (hasAttribute(m_xsiTypeName)) {
                        // This instance document has an element with no definition in the schema
                        // but an explicitly given type, that is fine according to the spec.
                        // We will create an element definition manually here and continue the
                        // normal validation process
                        elementDeclaration = XsdElement::Ptr(new XsdElement());
                        elementDeclaration->setName(name());
                        elementDeclaration->setIsAbstract(false);
                        elementDeclaration->setIsNillable(hasAttribute(m_xsiNilName));

                        const QString type = qNameAttribute(m_xsiTypeName);
                        const QXmlName typeName = convertToQName(type);

                        const SchemaType::Ptr elementType = typeByName(typeName);
                        if (!elementType) {
                            error(QtXmlPatterns::tr("Specified type %1 is not known to the schema.").arg(formatType(m_namePool, typeName)));
                            return false;
                        }
                        elementDeclaration->setType(elementType);
                    }
                }

                if (!elementDeclaration) {
                    if (wildcard->processContents() == XsdWildcard::Strict) {
                        error(QtXmlPatterns::tr("Declaration for element %1 does not exist.").arg(formatKeyword(m_namePool->displayName(name()))));
                        return false;
                    } else {
                        // in this case we put a state machine for the xs:anyType on the statemachine stack,
                        // so we accept every content of this element

                        createAndPushStateMachine(anyType()->contentType()->particle());
                        hasStateMachine = true;
                    }
                } else {
                    if (!validateElement(elementDeclaration, hasStateMachine)) {
                        if (wildcard->processContents() == XsdWildcard::Strict) {
                            error(QtXmlPatterns::tr("Element %1 contains invalid content.").arg(formatKeyword(m_namePool->displayName(name()))));
                            return false;
                        }
                    }

                    // rememeber the type of that element node
                    m_model->setAssignedType(item().toNodeModelIndex(), elementDeclaration->type());
                }
            } else { // wildcard process contents type is Skip
                // in this case we put a state machine for the xs:anyType on the statemachine stack,
                // so we accept every content of this element

                const XsdWildcard::Ptr wildcard(new XsdWildcard());
                wildcard->namespaceConstraint()->setVariety(XsdWildcard::NamespaceConstraint::Any);
                wildcard->setProcessContents(XsdWildcard::Skip);

                const XsdParticle::Ptr outerParticle(new XsdParticle());
                outerParticle->setMinimumOccurs(1);
                outerParticle->setMaximumOccurs(1);

                const XsdParticle::Ptr innerParticle(new XsdParticle());
                innerParticle->setMinimumOccurs(0);
                innerParticle->setMaximumOccursUnbounded(true);
                innerParticle->setTerm(wildcard);

                const XsdModelGroup::Ptr outerModelGroup(new XsdModelGroup());
                outerModelGroup->setCompositor(XsdModelGroup::SequenceCompositor);
                outerModelGroup->setParticles(XsdParticle::List() << innerParticle);
                outerParticle->setTerm(outerModelGroup);

                createAndPushStateMachine(outerParticle);
                hasStateMachine = true;
            }
        }
    }

    return true;
}

void XsdValidatingInstanceReader::createAndPushStateMachine(const XsdParticle::Ptr &particle)
{
    XsdStateMachine<XsdTerm::Ptr> stateMachine(m_namePool);

    XsdStateMachineBuilder builder(&stateMachine, m_namePool, XsdStateMachineBuilder::ValidatingMode);
    const XsdStateMachine<XsdTerm::Ptr>::StateId endState = builder.reset();
    const XsdStateMachine<XsdTerm::Ptr>::StateId startState = builder.buildParticle(particle, endState);
    builder.addStartState(startState);

/*
    QString fileName = QString("/tmp/foo_%1.dot").arg(m_namePool->displayName(complexType->name(m_namePool)));
    QString pngFileName = QString("/tmp/foo_%1.png").arg(m_namePool->displayName(complexType->name(m_namePool)));
    QFile file(fileName);
    file.open(QIODevice::WriteOnly);
    stateMachine.outputGraph(&file, "Hello");
    file.close();
    ::system(QString("dot -Tpng %1 -o%2").arg(fileName).arg(pngFileName).toLatin1().data());
*/

    stateMachine = stateMachine.toDFA();

    m_stateMachines.push(stateMachine);
}

bool XsdValidatingInstanceReader::validateElement(const XsdElement::Ptr &declaration, bool &hasStateMachine)
{
    // http://www.w3.org/TR/xmlschema11-1/#d0e10998

    bool isNilled = false;

    // 1 tested already, 'declaration' corresponds D

    // 2
    if (declaration->isAbstract()) {
        error(QtXmlPatterns::tr("Element %1 is declared as abstract.").arg(formatKeyword(declaration->displayName(m_namePool))));
        return false;
    }

    // 3
    if (!declaration->isNillable()) {
        if (hasAttribute(m_xsiNilName)) {
            error(QtXmlPatterns::tr("Element %1 is not nillable.").arg(formatKeyword(declaration->displayName(m_namePool))));
            return false; // 3.1
        }
    } else {
        if (hasAttribute(m_xsiNilName)) {
            const QString value = attribute(m_xsiNilName);
            const Boolean::Ptr nil = Boolean::fromLexical(value);
            if (nil->hasError()) {
                error(QtXmlPatterns::tr("Attribute %1 contains invalid data: %2").arg(formatKeyword(QLatin1String("nil."))).arg(formatData(value)));
                return false;
            }

            // 3.2.3
            if (nil->as<Boolean>()->value() == true) {
                // 3.2.3.1
                if (hasChildElement() || hasChildText()) {
                    error(QtXmlPatterns::tr("Element contains content although it is nillable."));
                    return false;
                }

                // 3.2.3.2
                if (declaration->valueConstraint() && declaration->valueConstraint()->variety() == XsdElement::ValueConstraint::Fixed) {
                    error(QtXmlPatterns::tr("Fixed value constrained not allowed if element is nillable."));
                    return false;
                }
            }

            isNilled = nil->as<Boolean>()->value();
        }
    }

    SchemaType::Ptr finalElementType = declaration->type();

    // 4
    if (hasAttribute(m_xsiTypeName)) {
        const QString type = qNameAttribute(m_xsiTypeName);
        const QXmlName typeName = convertToQName(type);

        const SchemaType::Ptr elementType = typeByName(typeName);
        // 4.1
        if (!elementType) {
            error(QtXmlPatterns::tr("Specified type %1 is not known to the schema.").arg(formatType(m_namePool, typeName)));
            return false;
        }

        // 4.2
        SchemaType::DerivationConstraints constraints = 0;
        if (declaration->disallowedSubstitutions() & NamedSchemaComponent::ExtensionConstraint)
            constraints |= SchemaType::ExtensionConstraint;
        if (declaration->disallowedSubstitutions() & NamedSchemaComponent::RestrictionConstraint)
            constraints |= SchemaType::RestrictionConstraint;

        if (!XsdSchemaHelper::isValidlySubstitutable(elementType, declaration->type(), constraints)) {
            if (declaration->type()->name(m_namePool) != BuiltinTypes::xsAnyType->name(m_namePool)) { // xs:anyType is a valid substitutable type here
                error(QtXmlPatterns::tr("Specified type %1 is not validly substitutable with element type %2.").arg(formatType(m_namePool, elementType)).arg(formatType(m_namePool, declaration->type())));
                return false;
            }
        }

        finalElementType = elementType;
    }

    if (!validateElementType(declaration, finalElementType, isNilled, hasStateMachine))
        return false;

    return true;
}

bool XsdValidatingInstanceReader::validateElementType(const XsdElement::Ptr &declaration, const SchemaType::Ptr &type, bool isNilled, bool &hasStateMachine)
{
    // @see http://www.w3.org/TR/xmlschema11-1/#d0e11749

    // 1 checked already

    // 2
    if (type->isComplexType() && type->isDefinedBySchema()) {
        if (XsdComplexType::Ptr(type)->isAbstract()) {
            error(QtXmlPatterns::tr("Complex type %1 is not allowed to be abstract.").arg(formatType(m_namePool, type)));
            return false;
        }
    }

    // 3
    if (type->isSimpleType())
        return validateElementSimpleType(declaration, type, isNilled); // 3.1
    else
        return validateElementComplexType(declaration, type, isNilled, hasStateMachine); // 3.2
}

bool XsdValidatingInstanceReader::validateElementSimpleType(const XsdElement::Ptr &declaration, const SchemaType::Ptr &type, bool isNilled)
{
    // @see http://www.w3.org/TR/xmlschema11-1/#d0e11749

    // 3.1.1
    const QSet<QXmlName> allowedAttributes(QSet<QXmlName>() << m_xsiNilName << m_xsiTypeName << m_xsiSchemaLocationName << m_xsiNoNamespaceSchemaLocationName);
    QSet<QXmlName> elementAttributes = attributeNames();
    elementAttributes.subtract(allowedAttributes);
    if (!elementAttributes.isEmpty()) {
        error(QtXmlPatterns::tr("Element %1 contains not allowed attributes.").arg(formatKeyword(declaration->displayName(m_namePool))));
        return false;
    }

    // 3.1.2
    if (hasChildElement()) {
        error(QtXmlPatterns::tr("Element %1 contains not allowed child element.").arg(formatKeyword(declaration->displayName(m_namePool))));
        return false;
    }

    // 3.1.3
    if (!isNilled) {
        const XsdFacet::Hash facets = XsdTypeChecker::mergedFacetsForType(type, m_context);

        QString actualValue;
        if (hasChildText()) {
            actualValue = XsdTypeChecker::normalizedValue(text(), facets);
        } else {
            if (declaration->valueConstraint())
                actualValue = XsdTypeChecker::normalizedValue(declaration->valueConstraint()->value(), facets);
        }

        QString errorMsg;
        AnySimpleType::Ptr boundType;

        const XsdTypeChecker checker(m_context, namespaceBindings(item().toNodeModelIndex()), sourceLocation());
        if (!checker.isValidString(actualValue, type, errorMsg, &boundType)) {
            error(QtXmlPatterns::tr("Content of element %1 does not match its type definition: %2.").arg(formatKeyword(declaration->displayName(m_namePool))).arg(errorMsg));
            return false;
        }

        // additional check
        if (declaration->valueConstraint() && declaration->valueConstraint()->variety() == XsdElement::ValueConstraint::Fixed) {
            const QString actualConstraintValue = XsdTypeChecker::normalizedValue(declaration->valueConstraint()->value(), facets);
            if (!text().isEmpty() && !checker.valuesAreEqual(actualValue, actualConstraintValue, type)) {
                error(QtXmlPatterns::tr("Content of element %1 does not match defined value constraint.").arg(formatKeyword(declaration->displayName(m_namePool))));
                return false;
            }
        }
    }

    // 4  checked in validateElement already

    // rememeber the type of that element node
    m_model->setAssignedType(item().toNodeModelIndex(), type);

    const XsdFacet::Hash facets = XsdTypeChecker::mergedFacetsForType(type, m_context);
    const QString actualValue = XsdTypeChecker::normalizedValue(text(), facets);

    if (BuiltinTypes::xsID->wxsTypeMatches(type)) {
        addIdIdRefBinding(actualValue, declaration);
    }

    if (m_idRefsType->wxsTypeMatches(type)) {
        const QStringList idRefs = actualValue.split(QLatin1Char(' '), QString::SkipEmptyParts);
        for (int i = 0; i < idRefs.count(); ++i) {
            m_idRefs.insert(idRefs.at(i));
        }
    } else if (BuiltinTypes::xsIDREF->wxsTypeMatches(type)) {
        m_idRefs.insert(actualValue);
    }

    return true;
}

static bool hasIDAttributeUse(const XsdAttributeUse::List &uses)
{
    const int count = uses.count();
    for (int i = 0; i < count; ++i) {
        if (BuiltinTypes::xsID->wxsTypeMatches(uses.at(i)->attribute()->type()))
            return true;
    }

    return false;
}

bool XsdValidatingInstanceReader::validateElementComplexType(const XsdElement::Ptr &declaration, const SchemaType::Ptr &type, bool isNilled, bool &hasStateMachine)
{
    // @see http://www.w3.org/TR/xmlschema11-1/#cvc-complex-type

    // 1
    if (!isNilled) {
        XsdComplexType::Ptr complexType;

        if (type->isDefinedBySchema()) {
            complexType = XsdComplexType::Ptr(type);
        } else {
            if (type->name(m_namePool) == BuiltinTypes::xsAnyType->name(m_namePool))
                complexType = anyType();
        }

        if (complexType) {
            // 1.1
            if (complexType->contentType()->variety() == XsdComplexType::ContentType::Empty) {
                if (hasChildText() || hasChildElement()) {
                    error(QtXmlPatterns::tr("Element %1 contains not allowed child content.").arg(formatKeyword(declaration->displayName(m_namePool))));
                    return false;
                }
            }

            // 1.2
            if (complexType->contentType()->variety() == XsdComplexType::ContentType::Simple) {
                if (hasChildElement()) {
                    error(QtXmlPatterns::tr("Element %1 contains not allowed child element.").arg(formatKeyword(declaration->displayName(m_namePool))));
                    return false;
                }

                const XsdFacet::Hash facets = XsdTypeChecker::mergedFacetsForType(complexType->contentType()->simpleType(), m_context);
                QString actualValue;
                if (hasChildText()) {
                    actualValue = XsdTypeChecker::normalizedValue(text(), facets);
                } else {
                    if (declaration->valueConstraint())
                        actualValue = XsdTypeChecker::normalizedValue(declaration->valueConstraint()->value(), facets);
                }

                QString errorMsg;
                AnySimpleType::Ptr boundType;
                const XsdTypeChecker checker(m_context, namespaceBindings(item().toNodeModelIndex()), sourceLocation());
                if (!checker.isValidString(actualValue, complexType->contentType()->simpleType(), errorMsg, &boundType)) {
                    error(QtXmlPatterns::tr("Content of element %1 does not match its type definition: %2.").arg(formatKeyword(declaration->displayName(m_namePool))).arg(errorMsg));
                    return false;
                }

                // additional check
                if (declaration->valueConstraint() && declaration->valueConstraint()->variety() == XsdElement::ValueConstraint::Fixed) {
                    if (!checker.valuesAreEqual(actualValue, declaration->valueConstraint()->value(), boundType)) {
                        error(QtXmlPatterns::tr("Content of element %1 does not match defined value constraint.").arg(formatKeyword(declaration->displayName(m_namePool))));
                        return false;
                    }
                }
            }

            // 1.3
            if (complexType->contentType()->variety() == XsdComplexType::ContentType::ElementOnly) {
                if (!text().simplified().isEmpty()) {
                    error(QtXmlPatterns::tr("Element %1 contains not allowed text content.").arg(formatKeyword(declaration->displayName(m_namePool))));
                    return false;
                }
            }

            // 1.4
            if (complexType->contentType()->variety() == XsdComplexType::ContentType::ElementOnly ||
                complexType->contentType()->variety() == XsdComplexType::ContentType::Mixed) {

                if (complexType->contentType()->particle()) {
                    createAndPushStateMachine(complexType->contentType()->particle());
                    hasStateMachine = true;
                }

                // additional check
                if (complexType->contentType()->variety() == XsdComplexType::ContentType::Mixed) {
                    if (declaration->valueConstraint() && declaration->valueConstraint()->variety() == XsdElement::ValueConstraint::Fixed) {
                        if (hasChildElement()) {
                            error(QtXmlPatterns::tr("Element %1 can not contain other elements, as it has a fixed content.").arg(formatKeyword(declaration->displayName(m_namePool))));
                            return false;
                        }

                        const XsdFacet::Hash facets = XsdTypeChecker::mergedFacetsForType(complexType->contentType()->simpleType(), m_context);
                        QString actualValue;
                        if (hasChildText()) {
                            actualValue = XsdTypeChecker::normalizedValue(text(), facets);
                        } else {
                            if (declaration->valueConstraint())
                                actualValue = XsdTypeChecker::normalizedValue(declaration->valueConstraint()->value(), facets);
                        }

                        if (actualValue != declaration->valueConstraint()->value()) {
                            error(QtXmlPatterns::tr("Content of element %1 does not match defined value constraint.").arg(formatKeyword(declaration->displayName(m_namePool))));
                            return false;
                        }
                    }
                }
            }
        }
    }

    if (type->isDefinedBySchema()) {
        const XsdComplexType::Ptr complexType(type);

        // create a lookup hash for faster access
        QHash<QXmlName, XsdAttributeUse::Ptr> attributeUseHash;
        {
            const XsdAttributeUse::List attributeUses = complexType->attributeUses();
            for (int i = 0; i < attributeUses.count(); ++i)
                attributeUseHash.insert(attributeUses.at(i)->attribute()->name(m_namePool), attributeUses.at(i));
        }

        const QSet<QXmlName> attributes(attributeNames());

        // 3
        QHashIterator<QXmlName, XsdAttributeUse::Ptr> usesIt(attributeUseHash);
        while (usesIt.hasNext()) {
            usesIt.next();

            if (usesIt.value()->isRequired()) {
                if (!attributes.contains(usesIt.key())) {
                    error(QtXmlPatterns::tr("Element %1 is missing required attribute %2.").arg(formatKeyword(declaration->displayName(m_namePool)))
                                                                                          .arg(formatKeyword(m_namePool->displayName(usesIt.key()))));
                    return false;
                }
            }
        }

        bool hasIDAttribute = hasIDAttributeUse(complexType->attributeUses());

        // 2
        QSetIterator<QXmlName> it(attributes);
        while (it.hasNext()) {
            const QXmlName attributeName = it.next();

            // skip builtin attributes
            if (attributeName == m_xsiNilName ||
                attributeName == m_xsiTypeName ||
                attributeName == m_xsiSchemaLocationName ||
                attributeName == m_xsiNoNamespaceSchemaLocationName)
                continue;

            // 2.1
            if (attributeUseHash.contains(attributeName) && (attributeUseHash.value(attributeName)->useType() != XsdAttributeUse::ProhibitedUse)) {
                if (!validateAttribute(attributeUseHash.value(attributeName), attribute(attributeName)))
                    return false;
            } else { // 2.2
                if (complexType->attributeWildcard()) {
                    const XsdWildcard::Ptr wildcard(complexType->attributeWildcard());
                    if (!validateAttributeWildcard(attributeName, wildcard)) {
                        error(QtXmlPatterns::tr("Attribute %1 does not match the attribute wildcard.").arg(formatKeyword(m_namePool->displayName(attributeName))));
                        return false;
                    }

                    if (wildcard->processContents() != XsdWildcard::Skip) {
                        const XsdAttribute::Ptr attributeDeclaration = attributeByName(attributeName);

                        if (!attributeDeclaration) {
                            if (wildcard->processContents() == XsdWildcard::Strict) {
                                error(QtXmlPatterns::tr("Declaration for attribute %1 does not exist.").arg(formatKeyword(m_namePool->displayName(attributeName))));
                                return false;
                            }
                        } else {
                            if (BuiltinTypes::xsID->wxsTypeMatches(attributeDeclaration->type())) {
                                if (hasIDAttribute) {
                                    error(QtXmlPatterns::tr("Element %1 contains two attributes of type %2.")
                                                           .arg(formatKeyword(declaration->displayName(m_namePool)))
                                                           .arg(formatKeyword("ID")));
                                    return false;
                                }

                                hasIDAttribute = true;
                            }

                            if (!validateAttribute(attributeDeclaration, attribute(attributeName))) {
                                if (wildcard->processContents() == XsdWildcard::Strict) {
                                    error(QtXmlPatterns::tr("Attribute %1 contains invalid content.").arg(formatKeyword(m_namePool->displayName(attributeName))));
                                    return false;
                                }
                            }
                        }
                    }
                } else {
                    error(QtXmlPatterns::tr("Element %1 contains unknown attribute %2.").arg(formatKeyword(declaration->displayName(m_namePool)))
                                                                                       .arg(formatKeyword(m_namePool->displayName(attributeName))));
                    return false;
                }
            }
        }
    }

    // 4
    // so what?...

    // 5
    // hmm...

    // 6
    // TODO: check assertions

    // 7
    // TODO: check type table restrictions

    // rememeber the type of that element node
    m_model->setAssignedType(item().toNodeModelIndex(), type);

    return true;
}

bool XsdValidatingInstanceReader::validateAttribute(const XsdAttributeUse::Ptr &declaration, const QString &value)
{
    const AnySimpleType::Ptr attributeType = declaration->attribute()->type();
    const XsdFacet::Hash facets = XsdTypeChecker::mergedFacetsForType(attributeType, m_context);

    const QString actualValue = XsdTypeChecker::normalizedValue(value, facets);

    QString errorMsg;
    AnySimpleType::Ptr boundType;

    const QXmlNodeModelIndex index = attributeItem(declaration->attribute()->name(m_namePool)).toNodeModelIndex();

    const XsdTypeChecker checker(m_context, namespaceBindings(index), sourceLocation());
    if (!checker.isValidString(actualValue, attributeType, errorMsg, &boundType)) {
        error(QtXmlPatterns::tr("Content of attribute %1 does not match its type definition: %2.").arg(formatKeyword(declaration->attribute()->displayName(m_namePool))).arg(errorMsg));
        return false;
    }

    // @see http://www.w3.org/TR/xmlschema11-1/#cvc-au
    if (declaration->valueConstraint() && declaration->valueConstraint()->variety() == XsdAttributeUse::ValueConstraint::Fixed) {
        const QString actualConstraintValue = XsdTypeChecker::normalizedValue(declaration->valueConstraint()->value(), facets);
        if (!checker.valuesAreEqual(actualValue, actualConstraintValue, attributeType)) {
            error(QtXmlPatterns::tr("Content of attribute %1 does not match defined value constraint.").arg(formatKeyword(declaration->attribute()->displayName(m_namePool))));
            return false;
        }
    }

    if (BuiltinTypes::xsID->wxsTypeMatches(declaration->attribute()->type())) {
        addIdIdRefBinding(actualValue, declaration->attribute());
    }

    if (m_idRefsType->wxsTypeMatches(declaration->attribute()->type())) {
        const QStringList idRefs = actualValue.split(QLatin1Char(' '), QString::SkipEmptyParts);
        for (int i = 0; i < idRefs.count(); ++i)
            m_idRefs.insert(idRefs.at(i));
    } else if (BuiltinTypes::xsIDREF->wxsTypeMatches(declaration->attribute()->type())) {
        m_idRefs.insert(actualValue);
    }

    m_model->setAssignedType(index, declaration->attribute()->type());
    m_model->setAssignedAttribute(index, declaration->attribute());

    return true;
}

//TODO: merge that with the method above
bool XsdValidatingInstanceReader::validateAttribute(const XsdAttribute::Ptr &declaration, const QString &value)
{
    const AnySimpleType::Ptr attributeType = declaration->type();
    const XsdFacet::Hash facets = XsdTypeChecker::mergedFacetsForType(attributeType, m_context);

    const QString actualValue = XsdTypeChecker::normalizedValue(value, facets);

    QString errorMsg;
    AnySimpleType::Ptr boundType;

    const QXmlNodeModelIndex index = attributeItem(declaration->name(m_namePool)).toNodeModelIndex();

    const XsdTypeChecker checker(m_context, namespaceBindings(index), sourceLocation());
    if (!checker.isValidString(actualValue, attributeType, errorMsg, &boundType)) {
        error(QtXmlPatterns::tr("Content of attribute %1 does not match its type definition: %2.").arg(formatKeyword(declaration->displayName(m_namePool))).arg(errorMsg));
        return false;
    }

    // @see http://www.w3.org/TR/xmlschema11-1/#cvc-au
    if (declaration->valueConstraint() && declaration->valueConstraint()->variety() == XsdAttribute::ValueConstraint::Fixed) {
        const QString actualConstraintValue = XsdTypeChecker::normalizedValue(declaration->valueConstraint()->value(), facets);
        if (!checker.valuesAreEqual(actualValue, actualConstraintValue, attributeType)) {
            error(QtXmlPatterns::tr("Content of attribute %1 does not match defined value constraint.").arg(formatKeyword(declaration->displayName(m_namePool))));
            return false;
        }
    }

    if (BuiltinTypes::xsID->wxsTypeMatches(declaration->type())) {
        addIdIdRefBinding(actualValue, declaration);
    }

    if (m_idRefsType->wxsTypeMatches(declaration->type())) {
        const QStringList idRefs = actualValue.split(QLatin1Char(' '), QString::SkipEmptyParts);
        for (int i = 0; i < idRefs.count(); ++i)
            m_idRefs.insert(idRefs.at(i));
    } else if (BuiltinTypes::xsIDREF->wxsTypeMatches(declaration->type())) {
        m_idRefs.insert(actualValue);
    }

    m_model->setAssignedType(index, declaration->type());
    m_model->setAssignedAttribute(index, declaration);

    return true;
}

bool XsdValidatingInstanceReader::validateAttributeWildcard(const QXmlName &attributeName, const XsdWildcard::Ptr &wildcard)
{
    // @see http://www.w3.org/TR/xmlschema11-1/#cvc-wildcard

    // wildcards using XsdWildcard::absentNamespace, so we have to fix that here
    QXmlName name(attributeName);
    if (name.namespaceURI() == StandardNamespaces::empty) {
        name.setNamespaceURI(m_namePool->allocateNamespace(XsdWildcard::absentNamespace()));
    }

    return XsdSchemaHelper::wildcardAllowsExpandedName(name, wildcard, m_namePool);
}

bool XsdValidatingInstanceReader::validateIdentityConstraint(const XsdElement::Ptr &element, const QXmlItem &currentItem)
{
    const XsdIdentityConstraint::List constraints = element->identityConstraints();

    for (int i = 0; i < constraints.count(); ++i) {
        const XsdIdentityConstraint::Ptr constraint = constraints.at(i);

        TargetNode::Set targetNodeSet, qualifiedNodeSet;
        selectNodeSets(element, currentItem, constraint, targetNodeSet, qualifiedNodeSet);

        if (constraint->category() == XsdIdentityConstraint::Unique) {
            if (!validateUniqueIdentityConstraint(element, constraint, qualifiedNodeSet))
                return false;
        } else if (constraint->category() == XsdIdentityConstraint::Key) {
            if (!validateKeyIdentityConstraint(element, constraint, targetNodeSet, qualifiedNodeSet))
                return false;
        }
    }

    // we do the keyref check in a separated run to make sure that all keys are available
    for (int i = 0; i < constraints.count(); ++i) {
        const XsdIdentityConstraint::Ptr constraint = constraints.at(i);
        if (constraint->category() == XsdIdentityConstraint::KeyReference) {
            TargetNode::Set targetNodeSet, qualifiedNodeSet;
            selectNodeSets(element, currentItem, constraint, targetNodeSet, qualifiedNodeSet);

            if (!validateKeyRefIdentityConstraint(element, constraint, qualifiedNodeSet))
                return false;
        }
    }

    return true;
}

bool XsdValidatingInstanceReader::validateUniqueIdentityConstraint(const XsdElement::Ptr&, const XsdIdentityConstraint::Ptr &constraint, const TargetNode::Set &qualifiedNodeSet)
{
    // @see http://www.w3.org/TR/xmlschema11-1/#d0e32243

    // 4.1
    const XsdSchemaSourceLocationReflection reflection(sourceLocation());

    QSetIterator<TargetNode> it(qualifiedNodeSet);
    while (it.hasNext()) {
        const TargetNode node = it.next();
        QSetIterator<TargetNode> innerIt(qualifiedNodeSet);
        while (innerIt.hasNext()) {
            const TargetNode innerNode = innerIt.next();

            if (node == innerNode) // do not compare with ourself
                continue;

            if (node.fieldsAreEqual(innerNode, m_namePool, m_context, &reflection)) {
                error(QtXmlPatterns::tr("Non-unique value found for constraint %1.").arg(formatKeyword(constraint->displayName(m_namePool))));
                return false;
            }
        }
    }

    m_idcKeys.insert(constraint->name(m_namePool), qualifiedNodeSet);

    return true;
}

bool XsdValidatingInstanceReader::validateKeyIdentityConstraint(const XsdElement::Ptr &element, const XsdIdentityConstraint::Ptr &constraint, const TargetNode::Set &targetNodeSet, const TargetNode::Set &qualifiedNodeSet)
{
    // @see http://www.w3.org/TR/xmlschema11-1/#d0e32243

    // 4.2
    const XsdSchemaSourceLocationReflection reflection(sourceLocation());

    // 4.2.1
    if (targetNodeSet.count() != qualifiedNodeSet.count()) {
        error(QtXmlPatterns::tr("Key constraint %1 contains absent fields.").arg(formatKeyword(constraint->displayName(m_namePool))));
        return false;
    }

    // 4.2.2
    if (!validateUniqueIdentityConstraint(element, constraint, qualifiedNodeSet))
        return false;

    // 4.2.3
    QSetIterator<TargetNode> it(qualifiedNodeSet);
    while (it.hasNext()) {
        const TargetNode node = it.next();
        const QVector<QXmlItem> fieldItems = node.fieldItems();
        for (int i = 0; i < fieldItems.count(); ++i) {
            const QXmlNodeModelIndex index = fieldItems.at(i).toNodeModelIndex();
            if (m_model->kind(index) == QXmlNodeModelIndex::Element) {
                const XsdElement::Ptr declaration = m_model->assignedElement(index);
                if (declaration && declaration->isNillable()) {
                    error(QtXmlPatterns::tr("Key constraint %1 contains references nillable element %2.")
                                           .arg(formatKeyword(constraint->displayName(m_namePool)))
                                           .arg(formatKeyword(declaration->displayName(m_namePool))));
                    return false;
                }
            }
        }
    }

    m_idcKeys.insert(constraint->name(m_namePool), qualifiedNodeSet);

    return true;
}

bool XsdValidatingInstanceReader::validateKeyRefIdentityConstraint(const XsdElement::Ptr&, const XsdIdentityConstraint::Ptr &constraint, const TargetNode::Set &qualifiedNodeSet)
{
    // @see http://www.w3.org/TR/xmlschema11-1/#d0e32243

    // 4.3
    const XsdSchemaSourceLocationReflection reflection(sourceLocation());

    const TargetNode::Set keySet = m_idcKeys.value(constraint->referencedKey()->name(m_namePool));

    QSetIterator<TargetNode> it(qualifiedNodeSet);
    while (it.hasNext()) {
        const TargetNode node = it.next();

        bool foundMatching = false;

        QSetIterator<TargetNode> keyIt(keySet);
        while (keyIt.hasNext()) {
            const TargetNode keyNode = keyIt.next();

            if (node.fieldsAreEqual(keyNode, m_namePool, m_context, &reflection)) {
                foundMatching = true;
                break;
            }
        }

        if (!foundMatching) {
            error(QtXmlPatterns::tr("No referenced value found for key reference %1.").arg(formatKeyword(constraint->displayName(m_namePool))));
            return false;
        }
    }

    return true;
}

QXmlQuery XsdValidatingInstanceReader::createXQuery(const QList<QXmlName> &namespaceBindings, const QXmlItem &contextNode, const QString &queryString) const
{
    // create a public name pool from our name pool
    QXmlNamePool namePool(m_namePool.data());

    // the QXmlQuery shall work with the same name pool as we do
    QXmlQuery query(namePool);

    // add additional namespace bindings
    QXmlQueryPrivate *queryPrivate = query.d;

    for (int i = 0; i < namespaceBindings.count(); ++i) {
        if (!namespaceBindings.at(i).prefix() == StandardPrefixes::empty)
            queryPrivate->addAdditionalNamespaceBinding(namespaceBindings.at(i));
    }

    // set the context node for that query and the query string
    query.setFocus(contextNode);
    query.setQuery(queryString, m_documentUri);

    return query;
}

bool XsdValidatingInstanceReader::selectNodeSets(const XsdElement::Ptr&, const QXmlItem &currentItem, const XsdIdentityConstraint::Ptr &constraint, TargetNode::Set &targetNodeSet, TargetNode::Set &qualifiedNodeSet)
{
    // at first select all target nodes
    const XsdXPathExpression::Ptr selector = constraint->selector();
    const XsdXPathExpression::List fields = constraint->fields();

    QXmlQuery query = createXQuery(selector->namespaceBindings(), currentItem, selector->expression());

    QXmlResultItems resultItems;
    query.evaluateTo(&resultItems);

    // now we iterate over all target nodes and select the fields for each node
    QXmlItem item(resultItems.next());
    while (!item.isNull()) {

        TargetNode targetNode(item);

        for (int i = 0; i < fields.count(); ++i) {
            const XsdXPathExpression::Ptr field = fields.at(i);
            QXmlQuery fieldQuery = createXQuery(field->namespaceBindings(), item, field->expression());

            QXmlResultItems fieldResultItems;
            fieldQuery.evaluateTo(&fieldResultItems);

            // copy result into vetor for better testing...
            QVector<QXmlItem> fieldVector;
            QXmlItem fieldItem(fieldResultItems.next());
            while (!fieldItem.isNull()) {
                fieldVector.append(fieldItem);
                fieldItem = fieldResultItems.next();
            }

            if (fieldVector.count() > 1) {
                error(QtXmlPatterns::tr("More than one value found for field %1.").arg(formatData(field->expression())));
                return false;
            }

            if (fieldVector.count() == 1) {
                fieldItem = fieldVector.first();

                const QXmlNodeModelIndex index = fieldItem.toNodeModelIndex();
                const SchemaType::Ptr type = m_model->assignedType(index);

                bool typeOk = true;
                if (type->isComplexType()) {
                    if (type->isDefinedBySchema()) {
                        if (XsdComplexType::Ptr(type)->contentType()->variety() != XsdComplexType::ContentType::Simple)
                            typeOk = false;
                    } else {
                        typeOk = false;
                    }
                }
                if (!typeOk) {
                    error(QtXmlPatterns::tr("Field %1 has no simple type.").arg(formatData(field->expression())));
                    return false;
                }

                SchemaType::Ptr targetType = type;
                QString value = m_model->stringValue(fieldItem.toNodeModelIndex());

                if (type->isDefinedBySchema()) {
                    if (type->isSimpleType())
                        targetType = XsdSimpleType::Ptr(type)->primitiveType();
                    else
                        targetType = XsdComplexType::Ptr(type)->contentType()->simpleType();
                } else {
                    if (BuiltinTypes::xsAnySimpleType->name(m_namePool) == type->name(m_namePool)) {
                        targetType = BuiltinTypes::xsString;
                        value = QLatin1String("___anySimpleType_value");
                    }
                }

                // if it is xs:QName derived type, we normalize the name content
                // and do a string comparison
                if (BuiltinTypes::xsQName->wxsTypeMatches(type)) {
                    targetType = BuiltinTypes::xsString;

                    const QXmlName qName = convertToQName(value.trimmed());
                    value = QString::fromLatin1("%1:%2").arg(m_namePool->stringForNamespace(qName.namespaceURI())).arg(m_namePool->stringForLocalName(qName.localName()));
                }

                targetNode.addField(fieldItem, value, targetType);
            } else {
                // we add an empty entry here, that makes comparison easier later on
                targetNode.addField(QXmlItem(), QString(), SchemaType::Ptr());
            }
        }

        targetNodeSet.insert(targetNode);

        item = resultItems.next();
    }

    // copy all items from target node set to qualified node set, that have no empty fields
    QSetIterator<TargetNode> it(targetNodeSet);
    while (it.hasNext()) {
        const TargetNode node = it.next();
        if (node.emptyFieldsCount() == 0)
            qualifiedNodeSet.insert(node);
    }

    return true;
}

XsdElement::Ptr XsdValidatingInstanceReader::elementByName(const QXmlName &name) const
{
    return m_schema->element(name);
}

XsdAttribute::Ptr XsdValidatingInstanceReader::attributeByName(const QXmlName &name) const
{
    return m_schema->attribute(name);
}

SchemaType::Ptr XsdValidatingInstanceReader::typeByName(const QXmlName &name) const
{
    const SchemaType::Ptr type = m_schema->type(name);
    if (type)
        return type;

    return m_context->schemaTypeFactory()->createSchemaType(name);
}

void XsdValidatingInstanceReader::addIdIdRefBinding(const QString &id, const NamedSchemaComponent::Ptr &binding)
{
    if (!m_model->idIdRefBindings(id).isEmpty()) {
        error(QtXmlPatterns::tr("ID value '%1' is not unique.").arg(formatKeyword(id)));
        return;
    }

    m_model->addIdIdRefBinding(id, binding);
}

QString XsdValidatingInstanceReader::qNameAttribute(const QXmlName &attributeName)
{
    const QString value = attribute(attributeName).simplified();
    if (!XPathHelper::isQName(value)) {
        error(QtXmlPatterns::tr("'%1' attribute contains invalid QName content: %2.").arg(m_namePool->displayName(attributeName)).arg(formatData(value)));
        return QString();
    } else {
        return value;
    }
}

XsdComplexType::Ptr XsdValidatingInstanceReader::anyType()
{
    if (m_anyType)
        return m_anyType;

    const XsdWildcard::Ptr wildcard(new XsdWildcard());
    wildcard->namespaceConstraint()->setVariety(XsdWildcard::NamespaceConstraint::Any);
    wildcard->setProcessContents(XsdWildcard::Lax);

    const XsdParticle::Ptr outerParticle(new XsdParticle());
    outerParticle->setMinimumOccurs(1);
    outerParticle->setMaximumOccurs(1);

    const XsdParticle::Ptr innerParticle(new XsdParticle());
    innerParticle->setMinimumOccurs(0);
    innerParticle->setMaximumOccursUnbounded(true);
    innerParticle->setTerm(wildcard);

    const XsdModelGroup::Ptr outerModelGroup(new XsdModelGroup());
    outerModelGroup->setCompositor(XsdModelGroup::SequenceCompositor);
    outerModelGroup->setParticles(XsdParticle::List() << innerParticle);
    outerParticle->setTerm(outerModelGroup);

    m_anyType = XsdComplexType::Ptr(new XsdComplexType());
    m_anyType->setName(BuiltinTypes::xsAnyType->name(m_namePool));
    m_anyType->setDerivationMethod(XsdComplexType::DerivationRestriction);
    m_anyType->contentType()->setVariety(XsdComplexType::ContentType::Mixed);
    m_anyType->contentType()->setParticle(outerParticle);
    m_anyType->setAttributeWildcard(wildcard);
    m_anyType->setIsAbstract(false);

    return m_anyType;
}

QT_END_NAMESPACE