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qgswfsprovider.cpp
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qgswfsprovider.cpp
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/***************************************************************************
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 ) )