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qgsogrprovider.cpp
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qgsogrprovider.cpp
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/***************************************************************************
qgsogrprovider.cpp Data provider for OGR supported formats
Formerly known as qgsshapefileprovider.cpp
begin : Oct 29, 2003
copyright : (C) 2003 by Gary E.Sherman
email : sherman at mrcc.com
***************************************************************************/
/***************************************************************************
* *
* 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 "qgsogrprovider.h"
#include "qgsogrfeatureiterator.h"
#include "qgslogger.h"
#include "qgsmessagelog.h"
#include "qgslocalec.h"
#include "qgsfeedback.h"
#include "qgssettings.h"
#include "qgsapplication.h"
#include "qgsdataitem.h"
#include "qgsdataprovider.h"
#include "qgsfeature.h"
#include "qgsfields.h"
#include "qgsgeometry.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsvectorlayerexporter.h"
#include "qgis.h"
#define CPL_SUPRESS_CPLUSPLUS //#spellok
#include <gdal.h> // to collect version information
#include <ogr_api.h>
#include <ogr_srs_api.h>
#include <cpl_string.h>
#include <limits>
#include <QtDebug>
#include <QFile>
#include <QDir>
#include <QFileInfo>
#include <QMap>
#include <QMessageBox>
#include <QString>
#include <QTextCodec>
#ifdef Q_OS_WIN
#include <windows.h>
#endif
#ifdef Q_OS_LINUX
#include <sys/vfs.h>
#endif
// Starting with GDAL 2.2, there are 2 concepts: unset fields and null fields
// whereas previously there was only unset fields. For QGIS purposes, both
// states (unset/null) are equivalent.
#ifndef OGRNullMarker
#define OGR_F_IsFieldSetAndNotNull OGR_F_IsFieldSet
#endif
static const QString TEXT_PROVIDER_KEY = QStringLiteral( "ogr" );
static const QString TEXT_PROVIDER_DESCRIPTION =
QStringLiteral( "OGR data provider" )
+ " (compiled against GDAL/OGR library version "
+ GDAL_RELEASE_NAME
+ ", running against GDAL/OGR library version "
+ GDALVersionInfo( "RELEASE_NAME" )
+ ')';
static OGRwkbGeometryType ogrWkbGeometryTypeFromName( const QString &typeName );
class QgsCPLErrorHandler
{
static void CPL_STDCALL showError( CPLErr errClass, int errNo, const char *msg )
{
if ( errNo != OGRERR_NONE )
QgsMessageLog::logMessage( QObject::tr( "OGR[%1] error %2: %3" ).arg( errClass ).arg( errNo ).arg( msg ), QObject::tr( "OGR" ) );
}
public:
QgsCPLErrorHandler()
{
CPLPushErrorHandler( showError );
}
~QgsCPLErrorHandler()
{
CPLPopErrorHandler();
}
private:
QgsCPLErrorHandler( const QgsCPLErrorHandler &other );
QgsCPLErrorHandler &operator=( const QgsCPLErrorHandler &other );
};
bool QgsOgrProvider::convertField( QgsField &field, const QTextCodec &encoding )
{
OGRFieldType ogrType = OFTString; //default to string
int ogrWidth = field.length();
int ogrPrecision = field.precision();
if ( ogrPrecision > 0 )
ogrWidth += 1;
switch ( field.type() )
{
case QVariant::LongLong:
ogrType = OFTInteger64;
ogrPrecision = 0;
ogrWidth = ogrWidth > 0 && ogrWidth <= 21 ? ogrWidth : 21;
break;
case QVariant::String:
ogrType = OFTString;
if ( ogrWidth < 0 || ogrWidth > 255 )
ogrWidth = 255;
break;
case QVariant::Int:
ogrType = OFTInteger;
ogrWidth = ogrWidth > 0 && ogrWidth <= 10 ? ogrWidth : 10;
ogrPrecision = 0;
break;
case QVariant::Double:
ogrType = OFTReal;
break;
case QVariant::Date:
ogrType = OFTDate;
break;
case QVariant::Time:
ogrType = OFTTime;
break;
case QVariant::DateTime:
ogrType = OFTDateTime;
break;
default:
return false;
}
field.setTypeName( encoding.toUnicode( OGR_GetFieldTypeName( ogrType ) ) );
field.setLength( ogrWidth );
field.setPrecision( ogrPrecision );
return true;
}
void QgsOgrProvider::repack()
{
if ( !mValid || ogrDriverName != QLatin1String( "ESRI Shapefile" ) || !ogrOrigLayer )
return;
QByteArray layerName = OGR_FD_GetName( OGR_L_GetLayerDefn( ogrOrigLayer ) );
// run REPACK on shape files
QByteArray sql = QByteArray( "REPACK " ) + layerName; // don't quote the layer name as it works with spaces in the name and won't work if the name is quoted
QgsDebugMsg( QString( "SQL: %1" ).arg( QString::fromUtf8( sql ) ) );
CPLErrorReset();
OGR_DS_ExecuteSQL( ogrDataSource, sql.constData(), nullptr, nullptr );
if ( CPLGetLastErrorType() != CE_None )
{
pushError( tr( "OGR[%1] error %2: %3" ).arg( CPLGetLastErrorType() ).arg( CPLGetLastErrorNo() ).arg( CPLGetLastErrorMsg() ) );
}
if ( mFilePath.endsWith( QLatin1String( ".shp" ), Qt::CaseInsensitive ) || mFilePath.endsWith( QLatin1String( ".dbf" ), Qt::CaseInsensitive ) )
{
QString packedDbf( mFilePath.left( mFilePath.size() - 4 ) + "_packed.dbf" );
if ( QFile::exists( packedDbf ) )
{
QgsMessageLog::logMessage( tr( "Possible corruption after REPACK detected. %1 still exists. This may point to a permission or locking problem of the original DBF." ).arg( packedDbf ), tr( "OGR" ), QgsMessageLog::CRITICAL );
OGR_DS_Destroy( ogrDataSource );
ogrLayer = ogrOrigLayer = nullptr;
ogrDataSource = QgsOgrProviderUtils::OGROpenWrapper( mFilePath.toUtf8().constData(), true, nullptr );
if ( ogrDataSource )
{
if ( mLayerName.isNull() )
{
ogrOrigLayer = OGR_DS_GetLayer( ogrDataSource, mLayerIndex );
}
else
{
ogrOrigLayer = OGR_DS_GetLayerByName( ogrDataSource, mLayerName.toUtf8().constData() );
}
if ( !ogrOrigLayer )
{
QgsMessageLog::logMessage( tr( "Original layer could not be reopened." ), tr( "OGR" ), QgsMessageLog::CRITICAL );
mValid = false;
}
ogrLayer = ogrOrigLayer;
}
else
{
QgsMessageLog::logMessage( tr( "Original datasource could not be reopened." ), tr( "OGR" ), QgsMessageLog::CRITICAL );
mValid = false;
}
}
}
long oldcount = mFeaturesCounted;
recalculateFeatureCount();
if ( oldcount != mFeaturesCounted )
emit dataChanged();
}
QgsVectorLayerExporter::ExportError QgsOgrProvider::createEmptyLayer( const QString &uri,
const QgsFields &fields,
QgsWkbTypes::Type wkbType,
const QgsCoordinateReferenceSystem &srs,
bool overwrite,
QMap<int, int> *oldToNewAttrIdxMap,
QString *errorMessage,
const QMap<QString, QVariant> *options )
{
QString encoding;
QString driverName = QStringLiteral( "ESRI Shapefile" );
QStringList dsOptions, layerOptions;
QString layerName;
if ( options )
{
if ( options->contains( QStringLiteral( "fileEncoding" ) ) )
encoding = options->value( QStringLiteral( "fileEncoding" ) ).toString();
if ( options->contains( QStringLiteral( "driverName" ) ) )
driverName = options->value( QStringLiteral( "driverName" ) ).toString();
if ( options->contains( QStringLiteral( "datasourceOptions" ) ) )
dsOptions << options->value( QStringLiteral( "datasourceOptions" ) ).toStringList();
if ( options->contains( QStringLiteral( "layerOptions" ) ) )
layerOptions << options->value( QStringLiteral( "layerOptions" ) ).toStringList();
if ( options->contains( QStringLiteral( "layerName" ) ) )
layerName = options->value( QStringLiteral( "layerName" ) ).toString();
}
if ( oldToNewAttrIdxMap )
oldToNewAttrIdxMap->clear();
if ( errorMessage )
errorMessage->clear();
QgsVectorFileWriter::ActionOnExistingFile action( QgsVectorFileWriter::CreateOrOverwriteFile );
bool update = false;
if ( options && options->contains( QStringLiteral( "update" ) ) )
{
update = options->value( QStringLiteral( "update" ) ).toBool();
if ( update )
{
if ( !overwrite && !layerName.isEmpty() )
{
OGRDataSourceH hDS = OGROpen( uri.toUtf8().constData(), TRUE, nullptr );
if ( hDS )
{
if ( OGR_DS_GetLayerByName( hDS, layerName.toUtf8().constData() ) )
{
OGR_DS_Destroy( hDS );
if ( errorMessage )
*errorMessage += QObject::tr( "Layer %2 of %1 exists and overwrite flag is false." )
.arg( uri ).arg( layerName );
return QgsVectorLayerExporter::ErrCreateDataSource;
}
OGR_DS_Destroy( hDS );
}
}
action = QgsVectorFileWriter::CreateOrOverwriteLayer;
}
}
if ( !overwrite && !update )
{
QFileInfo fi( uri );
if ( fi.exists() )
{
if ( errorMessage )
*errorMessage += QObject::tr( "Unable to create the datasource. %1 exists and overwrite flag is false." )
.arg( uri );
return QgsVectorLayerExporter::ErrCreateDataSource;
}
}
QgsVectorFileWriter *writer = new QgsVectorFileWriter(
uri, encoding, fields, wkbType,
srs, driverName, dsOptions, layerOptions, nullptr,
QgsVectorFileWriter::NoSymbology, nullptr,
layerName, action );
QgsVectorFileWriter::WriterError error = writer->hasError();
if ( error )
{
if ( errorMessage )
*errorMessage += writer->errorMessage();
delete writer;
return ( QgsVectorLayerExporter::ExportError ) error;
}
QMap<int, int> attrIdxMap = writer->attrIdxToOgrIdx();
delete writer;
if ( oldToNewAttrIdxMap )
{
bool firstFieldIsFid = false;
if ( !layerName.isEmpty() )
{
OGRDataSourceH hDS = OGROpen( uri.toUtf8().constData(), TRUE, nullptr );
if ( hDS )
{
OGRLayerH hLayer = OGR_DS_GetLayerByName( hDS, layerName.toUtf8().constData() );
if ( hLayer )
{
// Expose the OGR FID if it comes from a "real" column (typically GPKG)
// and make sure that this FID column is not exposed as a regular OGR field (shouldn't happen normally)
firstFieldIsFid = !( EQUAL( OGR_L_GetFIDColumn( hLayer ), "" ) ) &&
OGR_FD_GetFieldIndex( OGR_L_GetLayerDefn( hLayer ), OGR_L_GetFIDColumn( hLayer ) ) < 0 &&
fields.indexFromName( OGR_L_GetFIDColumn( hLayer ) ) < 0;
}
OGR_DS_Destroy( hDS );
}
}
for ( QMap<int, int>::const_iterator attrIt = attrIdxMap.begin(); attrIt != attrIdxMap.end(); ++attrIt )
{
oldToNewAttrIdxMap->insert( attrIt.key(), *attrIt + ( firstFieldIsFid ? 1 : 0 ) );
}
}
return QgsVectorLayerExporter::NoError;
}
static QString AnalyzeURI( QString const &uri,
bool &isSubLayer,
int &layerIndex,
QString &layerName,
QString &subsetString,
OGRwkbGeometryType &ogrGeometryTypeFilter )
{
isSubLayer = false;
layerIndex = 0;
layerName = QString();
subsetString = QString();
ogrGeometryTypeFilter = wkbUnknown;
QgsDebugMsg( "Data source uri is [" + uri + ']' );
// try to open for update, but disable error messages to avoid a
// message if the file is read only, because we cope with that
// ourselves.
// This part of the code parses the uri transmitted to the ogr provider to
// get the options the client wants us to apply
// If there is no | in the uri, then the uri is just the filename. The loaded
// layer will be layer 0.
if ( !uri.contains( '|', Qt::CaseSensitive ) )
{
return uri;
}
else
{
QStringList theURIParts = uri.split( '|' );
QString filePath = theURIParts.at( 0 );
for ( int i = 1 ; i < theURIParts.size(); i++ )
{
QString part = theURIParts.at( i );
int pos = part.indexOf( '=' );
QString field = part.left( pos );
QString value = part.mid( pos + 1 );
if ( field == QLatin1String( "layerid" ) )
{
bool ok;
layerIndex = value.toInt( &ok );
if ( ! ok || layerIndex < 0 )
{
layerIndex = -1;
}
else
{
isSubLayer = true;
}
}
else if ( field == QLatin1String( "layername" ) )
{
layerName = value;
isSubLayer = true;
}
else if ( field == QLatin1String( "subset" ) )
{
subsetString = value;
}
else if ( field == QLatin1String( "geometrytype" ) )
{
ogrGeometryTypeFilter = ogrWkbGeometryTypeFromName( value );
}
}
return filePath;
}
}
QgsOgrProvider::QgsOgrProvider( QString const &uri )
: QgsVectorDataProvider( uri )
, mFirstFieldIsFid( false )
, ogrDataSource( nullptr )
, mExtent( nullptr )
, mForceRecomputeExtent( false )
, ogrLayer( nullptr )
, ogrOrigLayer( nullptr )
, mLayerIndex( 0 )
, mIsSubLayer( false )
, mOgrGeometryTypeFilter( wkbUnknown )
, ogrDriver( nullptr )
, mValid( false )
, mOGRGeomType( wkbUnknown )
, mFeaturesCounted( QgsVectorDataProvider::Uncounted )
, mWriteAccess( false )
, mWriteAccessPossible( false )
, mDynamicWriteAccess( false )
, mShapefileMayBeCorrupted( false )
, mUpdateModeStackDepth( 0 )
, mCapabilities( 0 )
{
QgsApplication::registerOgrDrivers();
QgsSettings settings;
CPLSetConfigOption( "SHAPE_ENCODING", settings.value( QStringLiteral( "qgis/ignoreShapeEncoding" ), true ).toBool() ? "" : nullptr );
// make connection to the data source
QgsDebugMsg( "Data source uri is [" + uri + ']' );
mFilePath = AnalyzeURI( uri,
mIsSubLayer,
mLayerIndex,
mLayerName,
mSubsetString,
mOgrGeometryTypeFilter );
open( OpenModeInitial );
QList<NativeType> nativeTypes;
nativeTypes
<< QgsVectorDataProvider::NativeType( tr( "Whole number (integer)" ), QStringLiteral( "integer" ), QVariant::Int, 0, 11 )
<< QgsVectorDataProvider::NativeType( tr( "Whole number (integer 64 bit)" ), "integer64", QVariant::LongLong, 0, 21 )
<< QgsVectorDataProvider::NativeType( tr( "Decimal number (real)" ), QStringLiteral( "double" ), QVariant::Double, 0, 20, 0, 15 )
<< QgsVectorDataProvider::NativeType( tr( "Text (string)" ), QStringLiteral( "string" ), QVariant::String, 0, 65535 )
<< QgsVectorDataProvider::NativeType( tr( "Date" ), QStringLiteral( "date" ), QVariant::Date, 8, 8 );
// Some drivers do not support datetime type
// Please help to fill this list
if ( ogrDriverName != QLatin1String( "ESRI Shapefile" ) )
{
nativeTypes
<< QgsVectorDataProvider::NativeType( tr( "Time" ), QStringLiteral( "time" ), QVariant::Time, -1, -1 )
<< QgsVectorDataProvider::NativeType( tr( "Date & Time" ), QStringLiteral( "datetime" ), QVariant::DateTime );
}
setNativeTypes( nativeTypes );
QgsOgrConnPool::instance()->ref( dataSourceUri() );
}
QgsOgrProvider::~QgsOgrProvider()
{
QgsOgrConnPool::instance()->unref( dataSourceUri() );
// We must also make sure to flush unusef cached connections so that
// the file can be removed (#15137)
QgsOgrConnPool::instance()->invalidateConnections( dataSourceUri() );
// Do that as last step for final cleanup that might be prevented by
// still opened datasets.
close();
}
QgsAbstractFeatureSource *QgsOgrProvider::featureSource() const
{
return new QgsOgrFeatureSource( this );
}
bool QgsOgrProvider::setSubsetString( const QString &theSQL, bool updateFeatureCount )
{
QgsCPLErrorHandler handler;
if ( !ogrDataSource )
return false;
if ( theSQL == mSubsetString && mFeaturesCounted != QgsVectorDataProvider::Uncounted )
return true;
OGRLayerH prevLayer = ogrLayer;
QString prevSubsetString = mSubsetString;
mSubsetString = theSQL;
if ( !mSubsetString.isEmpty() )
{
ogrLayer = setSubsetString( ogrOrigLayer, ogrDataSource );
if ( !ogrLayer )
{
pushError( tr( "OGR[%1] error %2: %3" ).arg( CPLGetLastErrorType() ).arg( CPLGetLastErrorNo() ).arg( CPLGetLastErrorMsg() ) );
ogrLayer = prevLayer;
mSubsetString = prevSubsetString;
return false;
}
}
else
{
ogrLayer = ogrOrigLayer;
}
if ( prevLayer != ogrOrigLayer )
{
OGR_DS_ReleaseResultSet( ogrDataSource, prevLayer );
}
QString uri = mFilePath;
if ( !mLayerName.isNull() )
{
uri += QStringLiteral( "|layername=%1" ).arg( mLayerName );
}
else if ( mLayerIndex >= 0 )
{
uri += QStringLiteral( "|layerid=%1" ).arg( mLayerIndex );
}
if ( !mSubsetString.isEmpty() )
{
uri += QStringLiteral( "|subset=%1" ).arg( mSubsetString );
}
if ( mOgrGeometryTypeFilter != wkbUnknown )
{
uri += QStringLiteral( "|geometrytype=%1" ).arg( ogrWkbGeometryTypeName( mOgrGeometryTypeFilter ) );
}
setDataSourceUri( uri );
OGR_L_ResetReading( ogrLayer );
// getting the total number of features in the layer
// TODO: This can be expensive, do we really need it!
if ( updateFeatureCount )
{
recalculateFeatureCount();
}
// check the validity of the layer
QgsDebugMsg( "checking validity" );
loadFields();
QgsDebugMsg( "Done checking validity" );
invalidateCachedExtent( false );
emit dataChanged();
return true;
}
QString QgsOgrProvider::subsetString() const
{
return mSubsetString;
}
QString QgsOgrProvider::ogrWkbGeometryTypeName( OGRwkbGeometryType type ) const
{
QString geom;
// GDAL 2.1 can return M/ZM geometries
#if defined(GDAL_COMPUTE_VERSION) && GDAL_VERSION_NUM >= GDAL_COMPUTE_VERSION(2,1,0)
if ( wkbHasM( type ) )
{
geom = ogrWkbGeometryTypeName( wkbFlatten( type ) );
if ( wkbHasZ( type ) )
geom += "Z";
if ( wkbHasM( type ) )
geom += "M";
return geom;
}
#endif
switch ( ( long )type )
{
case wkbUnknown:
geom = QStringLiteral( "Unknown" );
break;
case wkbPoint:
geom = QStringLiteral( "Point" );
break;
case wkbLineString:
geom = QStringLiteral( "LineString" );
break;
case wkbPolygon:
geom = QStringLiteral( "Polygon" );
break;
case wkbMultiPoint:
geom = QStringLiteral( "MultiPoint" );
break;
case wkbMultiLineString:
geom = QStringLiteral( "MultiLineString" );
break;
case wkbMultiPolygon:
geom = QStringLiteral( "MultiPolygon" );
break;
case wkbGeometryCollection:
geom = QStringLiteral( "GeometryCollection" );
break;
case wkbCircularString:
geom = QStringLiteral( "CircularString" );
break;
case wkbCompoundCurve:
geom = QStringLiteral( "CompoundCurve" );
break;
case wkbCurvePolygon:
geom = QStringLiteral( "CurvePolygon" );
break;
case wkbMultiCurve:
geom = QStringLiteral( "MultiCurve" );
break;
case wkbMultiSurface:
geom = QStringLiteral( "MultiSurface" );
break;
case wkbCircularStringZ:
geom = QStringLiteral( "CircularStringZ" );
break;
case wkbCompoundCurveZ:
geom = QStringLiteral( "CompoundCurveZ" );
break;
case wkbCurvePolygonZ:
geom = QStringLiteral( "CurvePolygonZ" );
break;
case wkbMultiCurveZ:
geom = QStringLiteral( "MultiCurveZ" );
break;
case wkbMultiSurfaceZ:
geom = QStringLiteral( "MultiSurfaceZ" );
break;
case wkbNone:
geom = QStringLiteral( "None" );
break;
case wkbUnknown | wkb25DBit:
geom = QStringLiteral( "Unknown25D" );
break;
case wkbPoint25D:
geom = QStringLiteral( "Point25D" );
break;
case wkbLineString25D:
geom = QStringLiteral( "LineString25D" );
break;
case wkbPolygon25D:
geom = QStringLiteral( "Polygon25D" );
break;
case wkbMultiPoint25D:
geom = QStringLiteral( "MultiPoint25D" );
break;
case wkbMultiLineString25D:
geom = QStringLiteral( "MultiLineString25D" );
break;
case wkbMultiPolygon25D:
geom = QStringLiteral( "MultiPolygon25D" );
break;
case wkbGeometryCollection25D:
geom = QStringLiteral( "GeometryCollection25D" );
break;
default:
// Do not use ':', as it will mess with the separator used by QgsSublayersDialog::populateLayers()
geom = QStringLiteral( "Unknown WKB (%1)" ).arg( type );
}
return geom;
}
static OGRwkbGeometryType ogrWkbGeometryTypeFromName( const QString &typeName )
{
if ( typeName == QLatin1String( "Point" ) ) return wkbPoint;
else if ( typeName == QLatin1String( "LineString" ) ) return wkbLineString;
else if ( typeName == QLatin1String( "Polygon" ) ) return wkbPolygon;
else if ( typeName == QLatin1String( "MultiPoint" ) ) return wkbMultiPoint;
else if ( typeName == QLatin1String( "MultiLineString" ) ) return wkbMultiLineString;
else if ( typeName == QLatin1String( "MultiPolygon" ) ) return wkbMultiPolygon;
else if ( typeName == QLatin1String( "GeometryCollection" ) ) return wkbGeometryCollection;
else if ( typeName == QLatin1String( "None" ) ) return wkbNone;
else if ( typeName == QLatin1String( "Point25D" ) ) return wkbPoint25D;
else if ( typeName == QLatin1String( "LineString25D" ) ) return wkbLineString25D;
else if ( typeName == QLatin1String( "Polygon25D" ) ) return wkbPolygon25D;
else if ( typeName == QLatin1String( "MultiPoint25D" ) ) return wkbMultiPoint25D;
else if ( typeName == QLatin1String( "MultiLineString25D" ) ) return wkbMultiLineString25D;
else if ( typeName == QLatin1String( "MultiPolygon25D" ) ) return wkbMultiPolygon25D;
else if ( typeName == QLatin1String( "GeometryCollection25D" ) ) return wkbGeometryCollection25D;
return wkbUnknown;
}
QStringList QgsOgrProvider::subLayers() const
{
QgsDebugMsg( "Entered." );
if ( !mValid )
{
return QStringList();
}
if ( !mSubLayerList.isEmpty() )
return mSubLayerList;
for ( unsigned int i = 0; i < layerCount() ; i++ )
{
OGRLayerH layer = OGR_DS_GetLayer( ogrDataSource, i );
OGRFeatureDefnH fdef = OGR_L_GetLayerDefn( layer );
QString layerName = QString::fromUtf8( OGR_FD_GetName( fdef ) );
OGRwkbGeometryType layerGeomType = OGR_FD_GetGeomType( fdef );
// ignore this layer if a sublayer was requested and it is not this one
if ( mIsSubLayer &&
( ( !mLayerName.isNull() && layerName != mLayerName ) ||
( mLayerName.isNull() && mLayerIndex >= 0 && i != ( unsigned int )mLayerIndex ) ) )
{
QgsDebugMsg( QString( "subLayers() ignoring layer #%1 (%2)" ).arg( i ).arg( layerName ) );
continue;
}
if ( !mIsSubLayer && ( layerName == QLatin1String( "layer_styles" ) ||
layerName == QLatin1String( "qgis_projects" ) ) )
{
// Ignore layer_styles (coming from QGIS styling support) and
// qgis_projects (coming from http://plugins.qgis.org/plugins/QgisGeopackage/)
continue;
}
QgsDebugMsg( QString( "id = %1 name = %2 layerGeomType = %3" ).arg( i ).arg( layerName ).arg( layerGeomType ) );
if ( wkbFlatten( layerGeomType ) != wkbUnknown )
{
int layerFeatureCount = OGR_L_GetFeatureCount( layer, 0 );
QString geom = ogrWkbGeometryTypeName( layerGeomType );
mSubLayerList << QStringLiteral( "%1:%2:%3:%4" ).arg( i ).arg( layerName, layerFeatureCount == -1 ? tr( "Unknown" ) : QString::number( layerFeatureCount ), geom );
}
else
{
QgsDebugMsg( "Unknown geometry type, count features for each geometry type" );
// Add virtual sublayers for supported geometry types if layer type is unknown
// Count features for geometry types
QMap<OGRwkbGeometryType, int> fCount;
// TODO: avoid reading attributes, setRelevantFields cannot be called here because it is not constant
//setRelevantFields( ogrLayer, true, QgsAttributeList() );
OGR_L_ResetReading( layer );
OGRFeatureH fet;
while ( ( fet = OGR_L_GetNextFeature( layer ) ) )
{
OGRGeometryH geom = OGR_F_GetGeometryRef( fet );
if ( geom )
{
OGRwkbGeometryType gType = ogrWkbSingleFlatten( OGR_G_GetGeometryType( geom ) );
fCount[gType] = fCount.value( gType ) + 1;
}
OGR_F_Destroy( fet );
}
OGR_L_ResetReading( layer );
// it may happen that there are no features in the layer, in that case add unknown type
// to show to user that the layer exists but it is empty
if ( fCount.isEmpty() )
{
fCount[wkbUnknown] = 0;
}
// When there are CurvePolygons, promote Polygons
if ( fCount.contains( wkbPolygon ) && fCount.contains( wkbCurvePolygon ) )
{
fCount[wkbCurvePolygon] += fCount.value( wkbPolygon );
fCount.remove( wkbPolygon );
}
// When there are CompoundCurves, promote LineStrings and CircularStrings
if ( fCount.contains( wkbLineString ) && fCount.contains( wkbCompoundCurve ) )
{
fCount[wkbCompoundCurve] += fCount.value( wkbLineString );
fCount.remove( wkbLineString );
}
if ( fCount.contains( wkbCircularString ) && fCount.contains( wkbCompoundCurve ) )
{
fCount[wkbCompoundCurve] += fCount.value( wkbCircularString );
fCount.remove( wkbCircularString );
}
bool bIs25D = wkbHasZ( layerGeomType );
QMap<OGRwkbGeometryType, int>::const_iterator countIt = fCount.constBegin();
for ( ; countIt != fCount.constEnd(); ++countIt )
{
QString geom = ogrWkbGeometryTypeName( ( bIs25D ) ? wkbSetZ( countIt.key() ) : countIt.key() );
QString sl = QStringLiteral( "%1:%2:%3:%4" ).arg( i ).arg( layerName ).arg( fCount.value( countIt.key() ) ).arg( geom );
QgsDebugMsg( "sub layer: " + sl );
mSubLayerList << sl;
}
}
}
return mSubLayerList;
}
void QgsOgrProvider::setEncoding( const QString &e )
{
#if defined(OLCStringsAsUTF8)
QgsSettings settings;
if ( ( ogrDriverName == QLatin1String( "ESRI Shapefile" ) && settings.value( QStringLiteral( "qgis/ignoreShapeEncoding" ), true ).toBool() ) || !OGR_L_TestCapability( ogrLayer, OLCStringsAsUTF8 ) )
{
QgsVectorDataProvider::setEncoding( e );
}
else
{
QgsVectorDataProvider::setEncoding( QStringLiteral( "UTF-8" ) );
}
#else
QgsVectorDataProvider::setEncoding( e );
#endif
loadFields();
}
// This is reused by dataItem
OGRwkbGeometryType QgsOgrProvider::getOgrGeomType( OGRLayerH ogrLayer )
{
OGRFeatureDefnH fdef = OGR_L_GetLayerDefn( ogrLayer );
OGRwkbGeometryType geomType = wkbUnknown;
if ( fdef )
{
geomType = OGR_FD_GetGeomType( fdef );
// Handle wkbUnknown and its Z/M variants. QGIS has no unknown Z/M variants,
// so just use flat wkbUnknown
if ( wkbFlatten( geomType ) == wkbUnknown )
geomType = wkbUnknown;
// Some ogr drivers (e.g. GML) are not able to determine the geometry type of a layer like this.
// In such cases, we use virtual sublayers for each geometry if the layer contains
// multiple geometries (see subLayers) otherwise we guess geometry type from the first
// feature that has a geometry (limit us to a few features, not the whole layer)
if ( geomType == wkbUnknown )
{
geomType = wkbNone;
OGR_L_ResetReading( ogrLayer );
for ( int i = 0; i < 10; i++ )
{
OGRFeatureH nextFeature = OGR_L_GetNextFeature( ogrLayer );
if ( !nextFeature )
break;
OGRGeometryH geometry = OGR_F_GetGeometryRef( nextFeature );
if ( geometry )
{
geomType = OGR_G_GetGeometryType( geometry );
}
OGR_F_Destroy( nextFeature );
if ( geomType != wkbNone )
break;
}
OGR_L_ResetReading( ogrLayer );
}
}
return geomType;
}
void QgsOgrProvider::loadFields()
{
QgsOgrConnPool::instance()->invalidateConnections( dataSourceUri() );
//the attribute fields need to be read again when the encoding changes
mAttributeFields.clear();
mDefaultValues.clear();
if ( !ogrLayer )
return;
if ( mOgrGeometryTypeFilter != wkbUnknown )
{
mOGRGeomType = mOgrGeometryTypeFilter;
}
else
{
mOGRGeomType = getOgrGeomType( ogrLayer );
}
OGRFeatureDefnH fdef = OGR_L_GetLayerDefn( ogrLayer );
if ( fdef )
{
// Expose the OGR FID if it comes from a "real" column (typically GPKG)
// and make sure that this FID column is not exposed as a regular OGR field (shouldn't happen normally)
mFirstFieldIsFid = !( EQUAL( OGR_L_GetFIDColumn( ogrLayer ), "" ) ) &&
OGR_FD_GetFieldIndex( fdef, OGR_L_GetFIDColumn( ogrLayer ) ) < 0;
if ( mFirstFieldIsFid )
{
mAttributeFields.append(
QgsField(
OGR_L_GetFIDColumn( ogrLayer ),
QVariant::LongLong,
QStringLiteral( "Integer64" )
)
);
}
for ( int i = 0; i < OGR_FD_GetFieldCount( fdef ); ++i )
{
OGRFieldDefnH fldDef = OGR_FD_GetFieldDefn( fdef, i );
OGRFieldType ogrType = OGR_Fld_GetType( fldDef );
QVariant::Type varType;
switch ( ogrType )
{
case OFTInteger:
varType = QVariant::Int;
break;
case OFTInteger64:
varType = QVariant::LongLong;
break;
case OFTReal:
varType = QVariant::Double;
break;
case OFTDate:
varType = QVariant::Date;
break;
case OFTTime:
varType = QVariant::Time;
break;
case OFTDateTime:
varType = QVariant::DateTime;
break;
case OFTString:
default:
varType = QVariant::String; // other unsupported, leave it as a string
}
//TODO: fix this hack
#ifdef ANDROID
QString name = OGR_Fld_GetNameRef( fldDef );
#else
QString name = textEncoding()->toUnicode( OGR_Fld_GetNameRef( fldDef ) );
#endif
if ( mAttributeFields.indexFromName( name ) != -1 )
{
QString tmpname = name + "_%1";
int fix = 0;
while ( mAttributeFields.indexFromName( name ) != -1 )
{
name = tmpname.arg( ++fix );
}
}
int width = OGR_Fld_GetWidth( fldDef );
int prec = OGR_Fld_GetPrecision( fldDef );
if ( prec > 0 )
width -= 1;
QgsField newField = QgsField(
name,
varType,
#ifdef ANDROID
OGR_GetFieldTypeName( ogrType ),
#else
textEncoding()->toUnicode( OGR_GetFieldTypeName( ogrType ) ),
#endif
width, prec
);
// check if field is nullable
bool nullable = OGR_Fld_IsNullable( fldDef );
if ( !nullable )
{
QgsFieldConstraints constraints;
constraints.setConstraint( QgsFieldConstraints::ConstraintNotNull, QgsFieldConstraints::ConstraintOriginProvider );
newField.setConstraints( constraints );
}
// check if field has default value
QString defaultValue = textEncoding()->toUnicode( OGR_Fld_GetDefault( fldDef ) );
if ( !defaultValue.isEmpty() && !OGR_Fld_IsDefaultDriverSpecific( fldDef ) )
{
mDefaultValues.insert( i + ( mFirstFieldIsFid ? 1 : 0 ), defaultValue );
}
mAttributeFields.append( newField );
}