/
qgswfsprovider.cpp
1606 lines (1427 loc) · 52.8 KB
/
qgswfsprovider.cpp
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
/***************************************************************************
qgswfsprovider.cpp
-------------------
begin : July 25, 2006
copyright : (C) 2006 by Marco Hugentobler
email : marco dot hugentobler at karto dot baug dot ethz dot ch
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgis.h"
#include "qgsapplication.h"
#include "qgsfeature.h"
#include "qgsfield.h"
#include "qgsgeometry.h"
#include "qgscoordinatereferencesystem.h"
#include "qgslogger.h"
#include "qgsmessagelog.h"
#include "qgsogcutils.h"
#include "qgswfsconstants.h"
#include "qgswfsfeatureiterator.h"
#include "qgswfsprovider.h"
#include "qgswfscapabilities.h"
#include "qgswfsdescribefeaturetype.h"
#include "qgswfstransactionrequest.h"
#include "qgswfsshareddata.h"
#include "qgswfsutils.h"
#include "qgscrscache.h"
#include <QDomDocument>
#include <QMessageBox>
#include <QDomNodeList>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QFile>
#include <QUrl>
#include <QWidget>
#include <QPair>
#include <QTimer>
#include <QSettings>
#include <cfloat>
static const QString TEXT_PROVIDER_KEY = "WFS";
static const QString TEXT_PROVIDER_DESCRIPTION = "WFS data provider";
QgsWFSProvider::QgsWFSProvider( const QString& uri, const QgsWFSCapabilities::Capabilities &caps )
: QgsVectorDataProvider( uri )
, mShared( new QgsWFSSharedData( uri ) )
, mWKBType( QGis::WKBUnknown )
, mValid( true )
, mCapabilities( 0 )
{
mShared->mCaps = caps;
connect( mShared.data(), SIGNAL( raiseError( const QString& ) ), this, SLOT( pushErrorSlot( const QString& ) ) );
connect( mShared.data(), SIGNAL( extentUpdated() ), this, SIGNAL( fullExtentCalculated() ) );
if ( uri.isEmpty() )
{
mValid = false;
return;
}
//create mSourceCRS from url if possible [WBC 111221] refactored from GetFeatureGET()
QString srsname = mShared->mURI.SRSName();
if ( !srsname.isEmpty() )
{
if ( srsname == "EPSG:900913" )
mShared->mSourceCRS = QgsCRSCache::instance()->crsByOgcWmsCrs( "EPSG:3857" );
else
mShared->mSourceCRS = QgsCRSCache::instance()->crsByOgcWmsCrs( srsname );
}
// Must be called first to establish the version, in case we are in auto-detection
if ( !getCapabilities() )
{
mValid = false;
return;
}
if ( !mShared->mURI.sql().isEmpty() )
{
if ( !processSQL( mShared->mURI.sql(), mProcessSQLErrorMsg, mProcessSQLWarningMsg ) )
{
QgsMessageLog::logMessage( mProcessSQLErrorMsg, tr( "WFS" ) );
mValid = false;
return;
}
mSubsetString = mShared->mURI.sql();
}
else
{
mSubsetString = mShared->mURI.filter();
//fetch attributes of layer and type of its geometry attribute
//WBC 111221: extracting geometry type here instead of getFeature allows successful
//layer creation even when no features are retrieved (due to, e.g., BBOX or FILTER)
if ( !describeFeatureType( mShared->mGeometryAttribute, mShared->mFields, mWKBType ) )
{
mValid = false;
return;
}
mThisTypenameFields = mShared->mFields;
}
if ( !mShared->computeFilter( mProcessSQLErrorMsg ) )
{
QgsMessageLog::logMessage( mProcessSQLErrorMsg, tr( "WFS" ) );
mValid = false;
return;
}
//Failed to detect feature type from describeFeatureType -> get first feature from layer to detect type
if ( mWKBType == QGis::WKBUnknown )
{
QgsWFSFeatureDownloader downloader( mShared.data() );
connect( &downloader, SIGNAL( featureReceived( QVector<QgsWFSFeatureGmlIdPair> ) ),
this, SLOT( featureReceivedAnalyzeOneFeature( QVector<QgsWFSFeatureGmlIdPair> ) ) );
downloader.run( false, /* serialize features */
1 /* maxfeatures */ );
}
qRegisterMetaType<QgsRectangle>( "QgsRectangle" );
}
QgsWFSProvider::~QgsWFSProvider()
{
QgsDebugMsg( "~QgsWFSProvider()" );
}
class QgsWFSProviderSQLFunctionValidator: public QgsSQLStatement::RecursiveVisitor
{
public:
QgsWFSProviderSQLFunctionValidator(
const QList<QgsWFSCapabilities::Function>& spatialPredicatesList,
const QList<QgsWFSCapabilities::Function>& functionList );
bool hasError() const { return mError; }
const QString& errorMessage() const { return mErrorMessage; }
protected:
void visit( const QgsSQLStatement::NodeFunction& n ) override;
private:
const QList<QgsWFSCapabilities::Function>& mSpatialPredicatesList;
const QList<QgsWFSCapabilities::Function>& mFunctionList;
bool mError;
QString mErrorMessage;
};
QgsWFSProviderSQLFunctionValidator::QgsWFSProviderSQLFunctionValidator(
const QList<QgsWFSCapabilities::Function>& spatialPredicatesList,
const QList<QgsWFSCapabilities::Function>& functionList )
: mSpatialPredicatesList( spatialPredicatesList )
, mFunctionList( functionList )
, mError( false )
{
}
void QgsWFSProviderSQLFunctionValidator::visit( const QgsSQLStatement::NodeFunction& n )
{
if ( !mError )
{
bool foundMatch = false;
Q_FOREACH ( const QgsWFSCapabilities::Function& f, mSpatialPredicatesList )
{
if ( n.name().compare( f.name, Qt::CaseInsensitive ) == 0 ||
( "ST_" + n.name() ).compare( f.name, Qt::CaseInsensitive ) == 0 )
{
foundMatch = true;
}
}
Q_FOREACH ( const QgsWFSCapabilities::Function& f, mFunctionList )
{
if ( n.name().compare( f.name, Qt::CaseInsensitive ) == 0 )
{
foundMatch = true;
}
}
if ( !foundMatch )
{
mError = true;
mErrorMessage = QObject::tr( "Function '%1' is not declared by the WFS server" ).arg( n.name() );
}
QgsSQLStatement::RecursiveVisitor::visit( n );
}
}
class QgsWFSProviderSQLColumnRefValidator: public QgsSQLStatement::RecursiveVisitor
{
public:
QgsWFSProviderSQLColumnRefValidator(
const QgsWFSCapabilities::Capabilities& caps,
const QString& defaultTypeName,
const QMap< QString, QString >& mapTypenameAliasToTypename,
const QMap < QString, QgsFields >& mapTypenameToFields,
const QMap < QString, QString >& mapTypenameToGeometryAttribute );
bool hasError() const { return mError; }
const QString& errorMessage() const { return mErrorMessage; }
protected:
void visit( const QgsSQLStatement::NodeColumnRef& n ) override;
private:
const QgsWFSCapabilities::Capabilities mCaps;
QString mDefaultTypeName;
const QMap< QString, QString >& mMapTableAliasToName;
const QMap < QString, QgsFields >& mMapTypenameToFields;
const QMap < QString, QString >& mMapTypenameToGeometryAttribute;
bool mError;
QString mErrorMessage;
};
QgsWFSProviderSQLColumnRefValidator::QgsWFSProviderSQLColumnRefValidator(
const QgsWFSCapabilities::Capabilities& caps,
const QString& defaultTypeName,
const QMap< QString, QString >& mapTypenameAliasToTypename,
const QMap < QString, QgsFields >& mapTypenameToFields,
const QMap < QString, QString >& mapTypenameToGeometryAttribute )
: mCaps( caps )
, mDefaultTypeName( defaultTypeName )
, mMapTableAliasToName( mapTypenameAliasToTypename )
, mMapTypenameToFields( mapTypenameToFields )
, mMapTypenameToGeometryAttribute( mapTypenameToGeometryAttribute )
, mError( false )
{
}
void QgsWFSProviderSQLColumnRefValidator::visit( const QgsSQLStatement::NodeColumnRef& n )
{
if ( !mError && !n.star() )
{
QString typeName = mDefaultTypeName;
if ( !n.tableName().isEmpty() )
{
if ( mMapTableAliasToName.contains( n.tableName() ) )
typeName = mMapTableAliasToName[n.tableName()];
else if ( mMapTableAliasToName.contains( mCaps.addPrefixIfNeeded( n.tableName() ) ) )
typeName = mMapTableAliasToName[mCaps.addPrefixIfNeeded( n.tableName() )];
else
{
mError = true;
mErrorMessage = QObject::tr( "Column '%1' references a non existing table" ).
arg( n.dump() );
return;
}
}
QgsFields tableFields = mMapTypenameToFields[typeName];
int idx = tableFields.fieldNameIndex( n.name() );
if ( idx < 0 && mMapTypenameToGeometryAttribute[typeName] != n.name() )
{
mError = true;
mErrorMessage = QObject::tr( "Column '%1' references a non existing field" ).
arg( n.dump() );
return;
}
QgsSQLStatement::RecursiveVisitor::visit( n );
}
}
bool QgsWFSProvider::processSQL( const QString& sqlString, QString& errorMsg, QString& warningMsg )
{
QgsDebugMsg( QString( "Processing SQL: %1" ).arg( sqlString ) );
errorMsg.clear();
warningMsg.clear();
QgsSQLStatement sql( sqlString );
if ( sql.hasParserError() )
{
QString parserErrorString( sql.parserErrorString() );
QStringList parts( parserErrorString.split( "," ) );
parserErrorString = "";
Q_FOREACH ( const QString& part, parts )
{
QString newPart( part );
if ( part == "syntax error" )
newPart = tr( "Syntax error." );
else if ( part == " unexpected $end" )
newPart = tr( "Missing content at end of string." );
else if ( part.startsWith( " unexpected " ) )
newPart = tr( "%1 is unexpected." ).arg( part.mid( QString( " unexpected " ).size() ) );
else if ( part.startsWith( " expecting " ) )
newPart = tr( "%1 is expected instead." ).arg( part.mid( QString( " expecting " ).size() ) );
if ( !parserErrorString.isEmpty() )
parserErrorString += " ";
parserErrorString += newPart;
}
parserErrorString.replace( " or ", tr( "%1 or %2" ).arg( "", "" ) );
parserErrorString.replace( "COMMA", tr( "comma" ) );
parserErrorString.replace( "IDENTIFIER", tr( "an identifier" ) );
errorMsg = tr( "SQL query is invalid: %1" ).arg( parserErrorString );
return false;
}
if ( !sql.doBasicValidationChecks( errorMsg ) )
{
errorMsg = tr( "SQL query is invalid: %1" ).arg( errorMsg );
return false;
}
if ( sql.rootNode()->nodeType() != QgsSQLStatement::ntSelect )
{
// Shouldn't happen
QgsDebugMsg( "SQL statement is not a SELECT. This should not happen" );
return false;
}
const QgsSQLStatement::NodeSelect* select = dynamic_cast<const QgsSQLStatement::NodeSelect*>( sql.rootNode() );
if ( !select )
{
// Makes Coverity happy, but cannot happen in practice
QgsDebugMsg( "should not happen" );
return false;
}
mShared->mDistinctSelect = select->distinct();
QMap< QString, QString > mapTypenameAliasToTypename;
QMap< QString, QString > mapTypenameToTypenameAlias; // reverse map of the previous one
QList<QgsSQLStatement::NodeTableDef*> tables = select->tables();
QList< QString> typenameList;
bool severalTablesWithSameNameButDifferentPrefix = false;
QSet< QString > unprefixTypenames;
Q_FOREACH ( QgsSQLStatement::NodeTableDef* table, tables )
{
QString prefixedTypename( mShared->mCaps.addPrefixIfNeeded( table->name() ) );
if ( prefixedTypename.isEmpty() )
{
if ( mShared->mCaps.setAmbiguousUnprefixedTypename.contains( table->name() ) )
{
errorMsg = tr( "Typename '%1' is ambiguous without prefix" ).arg( table->name() );
}
else
{
errorMsg = tr( "Typename '%1' is unknown" ).arg( table->name() );
}
return false;
}
typenameList << prefixedTypename;
if ( unprefixTypenames.contains( QgsWFSUtils::removeNamespacePrefix( prefixedTypename ) ) )
{
severalTablesWithSameNameButDifferentPrefix = true;
}
unprefixTypenames.insert( QgsWFSUtils::removeNamespacePrefix( prefixedTypename ) );
if ( table->alias().isEmpty() )
{
mapTypenameAliasToTypename[ prefixedTypename ] = prefixedTypename;
mapTypenameToTypenameAlias[ prefixedTypename ] = prefixedTypename;
}
else
{
mapTypenameAliasToTypename[ table->alias()] = prefixedTypename;
mapTypenameToTypenameAlias[ prefixedTypename ] = table->alias();
}
}
QList<QgsSQLStatement::NodeJoin*> joins = select->joins();
Q_FOREACH ( QgsSQLStatement::NodeJoin* join, joins )
{
QgsSQLStatement::NodeTableDef* table = join->tableDef();
QString prefixedTypename( mShared->mCaps.addPrefixIfNeeded( table->name() ) );
if ( prefixedTypename.isEmpty() )
{
if ( mShared->mCaps.setAmbiguousUnprefixedTypename.contains( table->name() ) )
{
errorMsg = tr( "Typename '%1' is ambiguous without prefix" ).arg( table->name() );
}
else
{
errorMsg = tr( "Typename '%1' is unknown" ).arg( table->name() );
}
return false;
}
typenameList << prefixedTypename;
if ( unprefixTypenames.contains( QgsWFSUtils::removeNamespacePrefix( prefixedTypename ) ) )
{
severalTablesWithSameNameButDifferentPrefix = true;
}
unprefixTypenames.insert( QgsWFSUtils::removeNamespacePrefix( prefixedTypename ) );
if ( table->alias().isEmpty() )
{
mapTypenameAliasToTypename[ prefixedTypename ] = prefixedTypename;
mapTypenameToTypenameAlias[ prefixedTypename ] = prefixedTypename;
}
else
{
mapTypenameAliasToTypename[ table->alias()] = prefixedTypename;
mapTypenameToTypenameAlias[ prefixedTypename ] = table->alias();
}
}
if ( typenameList.size() > 1 && !mShared->mCaps.supportsJoins )
{
errorMsg = tr( "JOINs are not supported by this server" );
return false;
}
if ( !typenameList.contains( mShared->mURI.typeName() ) )
{
errorMsg = tr( "FROM or JOIN clause should contain the table name '%1'" ).arg( mShared->mURI.typeName() );
return false;
}
QString concatenatedTypenames;
Q_FOREACH ( QString typeName, typenameList )
{
if ( !concatenatedTypenames.isEmpty() )
concatenatedTypenames += ",";
concatenatedTypenames += typeName;
}
QgsWFSDescribeFeatureType describeFeatureType( mShared->mURI.uri() );
if ( !describeFeatureType.requestFeatureType( mShared->mWFSVersion,
concatenatedTypenames ) )
{
errorMsg = tr( "DescribeFeatureType failed for url %1: %2" ).
arg( dataSourceUri() ).arg( describeFeatureType.errorMessage() );
return false;
}
const QByteArray& response = describeFeatureType.response();
QDomDocument describeFeatureDocument;
errorMsg.clear();
if ( !describeFeatureDocument.setContent( response, true, &errorMsg ) )
{
QgsDebugMsg( response );
errorMsg = tr( "DescribeFeatureType failed for url %1: %2" ).
arg( dataSourceUri() ).arg( errorMsg );
return false;
}
mShared->mLayerPropertiesList.clear();
QMap < QString, QgsFields > mapTypenameToFields;
QMap < QString, QString > mapTypenameToGeometryAttribute;
Q_FOREACH ( QString typeName, typenameList )
{
QString geometryAttribute;
QgsFields fields;
QGis::WkbType geomType;
if ( !readAttributesFromSchema( describeFeatureDocument,
typeName,
geometryAttribute, fields, geomType, errorMsg ) )
{
errorMsg = tr( "Analysis of DescribeFeatureType response failed for url %1, typeName %2: %3" ).
arg( dataSourceUri() ).arg( typeName ).arg( errorMsg );
return false;
}
mapTypenameToFields[typeName] = fields;
mapTypenameToGeometryAttribute[typeName] = geometryAttribute;
if ( typeName == mShared->mURI.typeName() )
{
mShared->mGeometryAttribute = geometryAttribute;
mWKBType = geomType;
mThisTypenameFields = fields;
}
QgsOgcUtils::LayerProperties layerProperties;
layerProperties.mName = typeName;
layerProperties.mGeometryAttribute = geometryAttribute;
if ( typeName == mShared->mURI.typeName() )
layerProperties.mSRSName = mShared->srsName();
mShared->mLayerPropertiesList << layerProperties;
}
const QString& defaultTypeName = mShared->mURI.typeName();
QgsWFSProviderSQLColumnRefValidator oColumnValidator(
mShared->mCaps,
defaultTypeName,
mapTypenameAliasToTypename,
mapTypenameToFields,
mapTypenameToGeometryAttribute );
sql.acceptVisitor( oColumnValidator );
if ( oColumnValidator.hasError() )
{
errorMsg = oColumnValidator.errorMessage();
return false;
}
if ( mShared->mURI.validateSqlFunctions() )
{
QgsWFSProviderSQLFunctionValidator oValidator( mShared->mCaps.spatialPredicatesList,
mShared->mCaps.functionList );
sql.acceptVisitor( oValidator );
if ( oValidator.hasError() )
{
errorMsg = oValidator.errorMessage();
return false;
}
}
QList<QgsSQLStatement::NodeSelectedColumn*> columns = select->columns();
QMap< QString, QPair<QString, QString> > mapFieldNameToSrcLayerNameFieldName;
mShared->mFields.clear();
Q_FOREACH ( QgsSQLStatement::NodeSelectedColumn* selectedcolumn, columns )
{
QgsSQLStatement::Node* column = selectedcolumn->column();
if ( column->nodeType() != QgsSQLStatement::ntColumnRef )
{
errorMsg = tr( "Column '%1' is not a direct reference to a table column" ).arg( column->dump() );
return false;
}
QgsSQLStatement::NodeColumnRef* columnRef = dynamic_cast<QgsSQLStatement::NodeColumnRef*>( column );
Q_ASSERT( columnRef );
QString columnTableTypename = defaultTypeName;
if ( !columnRef->tableName().isEmpty() )
{
if ( mapTypenameAliasToTypename.contains( columnRef->tableName() ) )
columnTableTypename = mapTypenameAliasToTypename[columnRef->tableName()];
else
columnTableTypename = mShared->mCaps.addPrefixIfNeeded( columnRef->tableName() );
}
if ( columnRef->star() )
{
// table.* syntax
if ( !columnRef->tableName().isEmpty() )
{
const QgsFields tableFields = mapTypenameToFields[columnTableTypename];
for ( int i = 0; i < tableFields.size();i++ )
{
const QgsField& srcField = tableFields[i];
QString fieldName( srcField.name() );
// If several tables selected, prefix by table name
if ( typenameList.size() > 1 )
{
QString tablePrefix( mShared->mCaps.addPrefixIfNeeded( columnRef->tableName() ) );
if ( tablePrefix.isEmpty() ) // might be an alias
tablePrefix = columnRef->tableName();
if ( !severalTablesWithSameNameButDifferentPrefix )
tablePrefix = QgsWFSUtils::removeNamespacePrefix( tablePrefix );
fieldName = tablePrefix + "." + fieldName;
}
QgsField field( fieldName, srcField.type(), srcField.typeName() );
if ( mapFieldNameToSrcLayerNameFieldName.contains( fieldName ) )
{
errorMsg = tr( "Field '%1': a field with the same name already exists" ).arg( field.name() );
return false;
}
mapFieldNameToSrcLayerNameFieldName[ field.name()] =
QPair<QString, QString>( columnTableTypename, srcField.name() );
mShared->mFields.append( field );
}
}
else
{
// * syntax
Q_FOREACH ( QString typeName, typenameList )
{
const QgsFields tableFields = mapTypenameToFields[typeName];
for ( int i = 0; i < tableFields.size();i++ )
{
const QgsField& srcField = tableFields[i];
QString fieldName( srcField.name() );
// If several tables selected, prefix by table name
if ( typenameList.size() > 1 )
{
QString tablePrefix( mapTypenameToTypenameAlias[typeName] );
if ( !severalTablesWithSameNameButDifferentPrefix )
tablePrefix = QgsWFSUtils::removeNamespacePrefix( tablePrefix );
fieldName = tablePrefix + "." + fieldName;
}
QgsField field( fieldName, srcField.type(), srcField.typeName() );
mapFieldNameToSrcLayerNameFieldName[ field.name()] =
QPair<QString, QString>( typeName, srcField.name() );
mShared->mFields.append( field );
}
}
}
}
// Geometry field
else if ( mapTypenameToGeometryAttribute[columnTableTypename] == columnRef->name() )
{
if ( columnTableTypename != mShared->mURI.typeName() )
{
warningMsg = tr( "The geometry field of a typename that is not the main typename is ignored in the selected fields" );
QgsDebugMsg( warningMsg );
}
}
// Regular field
else
{
const QgsFields tableFields = mapTypenameToFields[columnTableTypename];
int idx = tableFields.fieldNameIndex( columnRef->name() );
if ( idx < 0 )
{
QgsDebugMsg( QString( "Should not happen. Cannot find field for %1" ).arg( columnRef->name() ) );
continue;
}
QString fieldName( columnRef->name() );
if ( !selectedcolumn->alias().isEmpty() )
fieldName = selectedcolumn->alias();
else if ( !columnRef->tableName().isEmpty() )
{
QString tablePrefix( mShared->mCaps.addPrefixIfNeeded( columnRef->tableName() ) );
if ( tablePrefix.isEmpty() ) // might be an alias
tablePrefix = columnRef->tableName();
if ( !severalTablesWithSameNameButDifferentPrefix )
tablePrefix = QgsWFSUtils::removeNamespacePrefix( tablePrefix );
fieldName = tablePrefix + "." + fieldName;
}
if ( mapFieldNameToSrcLayerNameFieldName.contains( fieldName ) )
{
errorMsg = tr( "Field '%1': a field with the same name already exists" ).arg( column->dump() );
return false;
}
QgsField field( fieldName, tableFields[idx].type(), tableFields[idx].typeName() );
mapFieldNameToSrcLayerNameFieldName[ field.name()] =
QPair<QString, QString>( columnTableTypename, tableFields[idx].name() );
mShared->mFields.append( field );
}
}
mShared->mMapFieldNameToSrcLayerNameFieldName = mapFieldNameToSrcLayerNameFieldName;
return true;
}
void QgsWFSProvider::pushErrorSlot( const QString& errorMsg )
{
pushError( errorMsg );
}
void QgsWFSProvider::featureReceivedAnalyzeOneFeature( QVector<QgsWFSFeatureGmlIdPair> list )
{
if ( list.size() != 0 )
{
QgsFeature feat = list[0].first;
const QgsGeometry* geometry = feat.constGeometry();
if ( geometry )
{
mWKBType = geometry->wkbType();
}
}
}
QString QgsWFSProvider::subsetString()
{
return mSubsetString;
}
bool QgsWFSProvider::setSubsetString( const QString& theSQL, bool updateFeatureCount )
{
QgsDebugMsg( QString( "theSql = '%1'" ).arg( theSQL ) );
// Invalid and cancel current download before altering fields, etc...
// (crashes might happen if not done at the beginning)
mShared->invalidateCache();
mSubsetString = theSQL;
mCacheMinMaxDirty = true;
// update URI
mShared->mFields = mThisTypenameFields;
mShared->mLayerPropertiesList.clear();
mShared->mMapFieldNameToSrcLayerNameFieldName.clear();
mShared->mDistinctSelect = false;
if ( theSQL.startsWith( "SELECT ", Qt::CaseInsensitive ) ||
theSQL.startsWith( "SELECT\t", Qt::CaseInsensitive ) ||
theSQL.startsWith( "SELECT\r", Qt::CaseInsensitive ) ||
theSQL.startsWith( "SELECT\n", Qt::CaseInsensitive ) )
{
QString errorMsg, warningMsg;
if ( !processSQL( theSQL, errorMsg, warningMsg ) )
{
QgsMessageLog::logMessage( errorMsg, tr( "WFS" ) );
return false;
}
mShared->mURI.setSql( theSQL );
mShared->mURI.setFilter( QString() );
}
else
{
mShared->mURI.setSql( QString() );
mShared->mURI.setFilter( theSQL );
}
setDataSourceUri( mShared->mURI.uri() );
QString errorMsg;
if ( !mShared->computeFilter( errorMsg ) )
QgsMessageLog::logMessage( errorMsg, tr( "WFS" ) );
reloadData();
if ( updateFeatureCount )
featureCount();
return true;
}
QgsAbstractFeatureSource* QgsWFSProvider::featureSource() const
{
QgsWFSFeatureSource *fs = new QgsWFSFeatureSource( this );
/*connect( fs, SIGNAL( extentRequested( const QgsRectangle & ) ),
this, SLOT( extendExtent( const QgsRectangle & ) ) );*/
return fs;
}
void QgsWFSProvider::reloadData()
{
mShared->invalidateCache();
QgsVectorDataProvider::reloadData();
}
QGis::WkbType QgsWFSProvider::geometryType() const
{
return mWKBType;
}
long QgsWFSProvider::featureCount() const
{
return mShared->getFeatureCount();
}
const QgsFields& QgsWFSProvider::fields() const
{
return mShared->mFields;
}
QString QgsWFSProvider::geometryAttribute() const
{
return mShared->mGeometryAttribute;
}
QgsCoordinateReferenceSystem QgsWFSProvider::crs()
{
return mShared->mSourceCRS;
}
QgsRectangle QgsWFSProvider::extent()
{
// Some servers return completely buggy extent in their capabilities response
// so mix it with the extent actually got from the downloaded features
QgsRectangle computedExtent( mShared->computedExtent() );
QgsDebugMsg( "computedExtent: " + computedExtent.toString() );
QgsDebugMsg( "mCapabilityExtent: " + mShared->mCapabilityExtent.toString() );
// If we didn't get any feature, then return capabilities extent.
if ( computedExtent.isNull() )
return mShared->mCapabilityExtent;
// If the capabilities extent is completely off from the features, then
// use feature extent.
// Case of standplaats layer of http://geodata.nationaalgeoregister.nl/bag/wfs
if ( !computedExtent.intersects( mShared->mCapabilityExtent ) )
return computedExtent;
if ( mShared->downloadFinished() )
{
return computedExtent;
}
computedExtent.combineExtentWith( mShared->mCapabilityExtent );
return computedExtent;
}
bool QgsWFSProvider::isValid()
{
return mValid;
}
QgsFeatureIterator QgsWFSProvider::getFeatures( const QgsFeatureRequest& request )
{
return QgsFeatureIterator( new QgsWFSFeatureIterator( new QgsWFSFeatureSource( this ), true, request ) );
}
bool QgsWFSProvider::addFeatures( QgsFeatureList &flist )
{
//create <Transaction> xml
QDomDocument transactionDoc;
QDomElement transactionElem = createTransactionElement( transactionDoc );
transactionDoc.appendChild( transactionElem );
//find out typename from uri and strip namespace prefix
QString tname = mShared->mURI.typeName();
if ( tname.isNull() )
{
return false;
}
tname = QgsWFSUtils::removeNamespacePrefix( tname );
//Add the features
QgsFeatureList::iterator featureIt = flist.begin();
for ( ; featureIt != flist.end(); ++featureIt )
{
//Insert element
QDomElement insertElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, "Insert" );
transactionElem.appendChild( insertElem );
QDomElement featureElem = transactionDoc.createElementNS( mApplicationNamespace, tname );
QgsAttributes featureAttributes = featureIt->attributes();
int nAttrs = featureAttributes.size();
for ( int i = 0; i < nAttrs; ++i )
{
const QVariant& value = featureAttributes.at( i );
if ( value.isValid() && !value.isNull() )
{
QDomElement fieldElem = transactionDoc.createElementNS( mApplicationNamespace, mShared->mFields.at( i ).name() );
QDomText fieldText = transactionDoc.createTextNode( convertToXML( value ) );
fieldElem.appendChild( fieldText );
featureElem.appendChild( fieldElem );
}
}
//add geometry column (as gml)
const QgsGeometry* geometry = featureIt->constGeometry();
if ( geometry != nullptr )
{
QDomElement geomElem = transactionDoc.createElementNS( mApplicationNamespace, mShared->mGeometryAttribute );
QgsGeometry the_geom( *geometry );
// convert to multi if the layer geom type is multi and the geom is not
if ( QGis::isMultiType( this->geometryType( ) ) && ! the_geom.isMultipart( ) )
{
the_geom.convertToMultiType();
}
QDomElement gmlElem = QgsOgcUtils::geometryToGML( &the_geom, transactionDoc );
if ( !gmlElem.isNull() )
{
gmlElem.setAttribute( "srsName", crs().authid() );
geomElem.appendChild( gmlElem );
featureElem.appendChild( geomElem );
}
}
insertElem.appendChild( featureElem );
}
QDomDocument serverResponse;
bool success = sendTransactionDocument( transactionDoc, serverResponse );
if ( !success )
{
return false;
}
if ( transactionSuccess( serverResponse ) )
{
//transaction successful. Add the features to the cache
QStringList idList = insertedFeatureIds( serverResponse );
QStringList::const_iterator idIt = idList.constBegin();
featureIt = flist.begin();
QVector<QgsWFSFeatureGmlIdPair> serializedFeatureList;
for ( ; idIt != idList.constEnd() && featureIt != flist.end(); ++idIt, ++featureIt )
{
serializedFeatureList.push_back( QgsWFSFeatureGmlIdPair( *featureIt, *idIt ) );
}
mShared->serializeFeatures( serializedFeatureList );
// And now set the feature id from the one got from the database
QMap< QString, QgsFeatureId > map;
for ( int idx = 0; idx < serializedFeatureList.size(); idx++ )
map[ serializedFeatureList[idx].second ] = serializedFeatureList[idx].first.id();
idIt = idList.constBegin();
featureIt = flist.begin();
for ( ; idIt != idList.constEnd() && featureIt != flist.end(); ++idIt, ++featureIt )
{
if ( map.find( *idIt ) != map.end() )
featureIt->setFeatureId( map[*idIt] );
}
return true;
}
else
{
handleException( serverResponse );
return false;
}
}
bool QgsWFSProvider::deleteFeatures( const QgsFeatureIds &id )
{
if ( id.size() < 1 )
{
return true;
}
//find out typename from uri and strip namespace prefix
QString tname = mShared->mURI.typeName();
if ( tname.isNull() )
{
return false;
}
//create <Transaction> xml
QDomDocument transactionDoc;
QDomElement transactionElem = createTransactionElement( transactionDoc );
transactionDoc.appendChild( transactionElem );
//delete element
QDomElement deleteElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, "Delete" );
deleteElem.setAttribute( "typeName", tname );
QDomElement filterElem = transactionDoc.createElementNS( QgsWFSConstants::OGC_NAMESPACE, "Filter" );
QgsFeatureIds::const_iterator idIt = id.constBegin();
for ( ; idIt != id.constEnd(); ++idIt )
{
//find out feature id
QString gmlid = mShared->findGmlId( *idIt );
if ( gmlid.isEmpty() )
{
QgsDebugMsg( QString( "Cannot identify feature of id %1" ).arg( *idIt ) );
continue;
}
QDomElement featureIdElem = transactionDoc.createElementNS( QgsWFSConstants::OGC_NAMESPACE, "FeatureId" );
featureIdElem.setAttribute( "fid", gmlid );
filterElem.appendChild( featureIdElem );
}
deleteElem.appendChild( filterElem );
transactionElem.appendChild( deleteElem );
QDomDocument serverResponse;
bool success = sendTransactionDocument( transactionDoc, serverResponse );
if ( !success )
{
return false;
}
if ( transactionSuccess( serverResponse ) )
{
mShared->deleteFeatures( id );
return true;
}
else
{
handleException( serverResponse );
return false;
}
}
bool QgsWFSProvider::changeGeometryValues( const QgsGeometryMap &geometry_map )
{
//find out typename from uri and strip namespace prefix
QString tname = mShared->mURI.typeName();
if ( tname.isNull() )
{
return false;
}
//create <Transaction> xml
QDomDocument transactionDoc;
QDomElement transactionElem = createTransactionElement( transactionDoc );
transactionDoc.appendChild( transactionElem );
QgsGeometryMap::const_iterator geomIt = geometry_map.constBegin();
for ( ; geomIt != geometry_map.constEnd(); ++geomIt )
{
QString gmlid = mShared->findGmlId( geomIt.key() );
if ( gmlid.isEmpty() )
{
QgsDebugMsg( QString( "Cannot identify feature of id %1" ).arg( geomIt.key() ) );
continue;
}
QDomElement updateElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, "Update" );
updateElem.setAttribute( "typeName", tname );
//Property
QDomElement propertyElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, "Property" );
QDomElement nameElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, "Name" );
QDomText nameText = transactionDoc.createTextNode( mShared->mGeometryAttribute );
nameElem.appendChild( nameText );
propertyElem.appendChild( nameElem );
QDomElement valueElem = transactionDoc.createElementNS( QgsWFSConstants::WFS_NAMESPACE, "Value" );
QDomElement gmlElem = QgsOgcUtils::geometryToGML( &geomIt.value(), transactionDoc );
gmlElem.setAttribute( "srsName", crs().authid() );
valueElem.appendChild( gmlElem );
propertyElem.appendChild( valueElem );
updateElem.appendChild( propertyElem );
//filter
QDomElement filterElem = transactionDoc.createElementNS( QgsWFSConstants::OGC_NAMESPACE, "Filter" );
QDomElement featureIdElem = transactionDoc.createElementNS( QgsWFSConstants::OGC_NAMESPACE, "FeatureId" );
featureIdElem.setAttribute( "fid", gmlid );
filterElem.appendChild( featureIdElem );
updateElem.appendChild( filterElem );
transactionElem.appendChild( updateElem );
}
QDomDocument serverResponse;
bool success = sendTransactionDocument( transactionDoc, serverResponse );
if ( !success )
{
return false;
}
if ( transactionSuccess( serverResponse ) )