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qgsvectorfilewriter.cpp
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qgsvectorfilewriter.cpp
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/***************************************************************************
qgsvectorfilewriter.cpp
generic vector file writer
-------------------
begin : Sat Jun 16 2004
copyright : (C) 2004 by Tim Sutton
email : tim at linfiniti.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 "qgsapplication.h"
#include "qgsfields.h"
#include "qgsfeature.h"
#include "qgsfeatureiterator.h"
#include "qgsgeometry.h"
#include "qgslogger.h"
#include "qgsmessagelog.h"
#include "qgscoordinatereferencesystem.h"
#include "qgsvectorfilewriter.h"
#include "qgsrenderer.h"
#include "qgssymbollayer.h"
#include "qgsvectordataprovider.h"
#include "qgsvectorlayer.h"
#include "qgslocalec.h"
#include "qgsexception.h"
#include "qgssettings.h"
#include "qgsgeometryengine.h"
#include "qgsproviderregistry.h"
#include "qgsexpressioncontextutils.h"
#include <QFile>
#include <QFileInfo>
#include <QDir>
#include <QTextCodec>
#include <QTextStream>
#include <QSet>
#include <QMetaType>
#include <cassert>
#include <cstdlib> // size_t
#include <limits> // std::numeric_limits
#include <ogr_srs_api.h>
#include <cpl_error.h>
#include <cpl_conv.h>
#include <cpl_string.h>
#include <gdal.h>
// Thin wrapper around OGROpen() to workaround a bug in GDAL < 2.3.1
// where a existing BNA file is wrongly reported to be openable in update mode
// but attempting to add features in it crashes the BNA driver.
static OGRDataSourceH myOGROpen( const char *pszName, int bUpdate, OGRSFDriverH *phDriver )
{
OGRSFDriverH hDriver = nullptr;
OGRDataSourceH hDS = OGROpen( pszName, bUpdate, &hDriver );
if ( hDS && bUpdate )
{
QString drvName = OGR_Dr_GetName( hDriver );
if ( drvName == "BNA" )
{
OGR_DS_Destroy( hDS );
if ( phDriver )
*phDriver = nullptr;
return nullptr;
}
}
if ( phDriver )
*phDriver = hDriver;
return hDS;
}
QgsField QgsVectorFileWriter::FieldValueConverter::fieldDefinition( const QgsField &field )
{
return field;
}
QVariant QgsVectorFileWriter::FieldValueConverter::convert( int /*fieldIdxInLayer*/, const QVariant &value )
{
return value;
}
QgsVectorFileWriter::FieldValueConverter *QgsVectorFileWriter::FieldValueConverter::clone() const
{
return new FieldValueConverter( *this );
}
QgsVectorFileWriter::QgsVectorFileWriter(
const QString &vectorFileName,
const QString &fileEncoding,
const QgsFields &fields,
QgsWkbTypes::Type geometryType,
const QgsCoordinateReferenceSystem &srs,
const QString &driverName,
const QStringList &datasourceOptions,
const QStringList &layerOptions,
QString *newFilename,
SymbologyExport symbologyExport,
QgsFeatureSink::SinkFlags sinkFlags,
QString *newLayer,
QgsCoordinateTransformContext transformContext
)
: mError( NoError )
, mWkbType( geometryType )
, mSymbologyExport( symbologyExport )
, mSymbologyScale( 1.0 )
{
init( vectorFileName, fileEncoding, fields, geometryType,
srs, driverName, datasourceOptions, layerOptions, newFilename, nullptr,
QString(), CreateOrOverwriteFile, newLayer, sinkFlags, transformContext );
}
QgsVectorFileWriter::QgsVectorFileWriter(
const QString &vectorFileName,
const QString &fileEncoding,
const QgsFields &fields,
QgsWkbTypes::Type geometryType,
const QgsCoordinateReferenceSystem &srs,
const QString &driverName,
const QStringList &datasourceOptions,
const QStringList &layerOptions,
QString *newFilename,
QgsVectorFileWriter::SymbologyExport symbologyExport,
FieldValueConverter *fieldValueConverter,
const QString &layerName,
ActionOnExistingFile action,
QString *newLayer,
QgsCoordinateTransformContext transformContext,
QgsFeatureSink::SinkFlags sinkFlags
)
: mError( NoError )
, mWkbType( geometryType )
, mSymbologyExport( symbologyExport )
, mSymbologyScale( 1.0 )
{
init( vectorFileName, fileEncoding, fields, geometryType, srs, driverName,
datasourceOptions, layerOptions, newFilename, fieldValueConverter,
layerName, action, newLayer, sinkFlags, transformContext );
}
QgsVectorFileWriter *QgsVectorFileWriter::create(
const QString &fileName,
const QgsFields &fields,
QgsWkbTypes::Type geometryType,
const QgsCoordinateReferenceSystem &srs,
const QgsCoordinateTransformContext &transformContext,
const QgsVectorFileWriter::SaveVectorOptions &options,
QgsFeatureSink::SinkFlags sinkFlags,
QString *newFilename,
QString *newLayer
)
{
Q_NOWARN_DEPRECATED_PUSH
return new QgsVectorFileWriter( fileName, options.fileEncoding, fields, geometryType, srs,
options.driverName, options.datasourceOptions, options.layerOptions,
newFilename, options.symbologyExport, options.fieldValueConverter, options.layerName,
options.actionOnExistingFile, newLayer, transformContext, sinkFlags );
Q_NOWARN_DEPRECATED_POP
}
bool QgsVectorFileWriter::supportsFeatureStyles( const QString &driverName )
{
if ( driverName == QLatin1String( "MapInfo MIF" ) )
{
return true;
}
#if GDAL_VERSION_NUM >= GDAL_COMPUTE_VERSION(2,3,0)
GDALDriverH gdalDriver = GDALGetDriverByName( driverName.toLocal8Bit().constData() );
if ( !gdalDriver )
return false;
char **driverMetadata = GDALGetMetadata( gdalDriver, nullptr );
if ( !driverMetadata )
return false;
return CSLFetchBoolean( driverMetadata, GDAL_DCAP_FEATURE_STYLES, false );
#else
return driverName == QLatin1String( "DXF" ) || driverName == QLatin1String( "KML" ) || driverName == QLatin1String( "MapInfo File" );
#endif
}
void QgsVectorFileWriter::init( QString vectorFileName,
QString fileEncoding,
const QgsFields &fields,
QgsWkbTypes::Type geometryType,
QgsCoordinateReferenceSystem srs,
const QString &driverName,
QStringList datasourceOptions,
QStringList layerOptions,
QString *newFilename,
FieldValueConverter *fieldValueConverter,
const QString &layerNameIn,
ActionOnExistingFile action,
QString *newLayer, SinkFlags sinkFlags,
const QgsCoordinateTransformContext &transformContext )
{
mRenderContext.setRendererScale( mSymbologyScale );
if ( vectorFileName.isEmpty() )
{
mErrorMessage = QObject::tr( "Empty filename given" );
mError = ErrCreateDataSource;
return;
}
if ( driverName == QLatin1String( "MapInfo MIF" ) )
{
mOgrDriverName = QStringLiteral( "MapInfo File" );
}
else if ( driverName == QLatin1String( "SpatiaLite" ) )
{
mOgrDriverName = QStringLiteral( "SQLite" );
if ( !datasourceOptions.contains( QStringLiteral( "SPATIALITE=YES" ) ) )
{
datasourceOptions.append( QStringLiteral( "SPATIALITE=YES" ) );
}
}
else if ( driverName == QLatin1String( "DBF file" ) )
{
mOgrDriverName = QStringLiteral( "ESRI Shapefile" );
if ( !layerOptions.contains( QStringLiteral( "SHPT=NULL" ) ) )
{
layerOptions.append( QStringLiteral( "SHPT=NULL" ) );
}
srs = QgsCoordinateReferenceSystem();
}
else
{
mOgrDriverName = driverName;
}
// find driver in OGR
OGRSFDriverH poDriver;
QgsApplication::registerOgrDrivers();
poDriver = OGRGetDriverByName( mOgrDriverName.toLocal8Bit().constData() );
if ( !poDriver )
{
mErrorMessage = QObject::tr( "OGR driver for '%1' not found (OGR error: %2)" )
.arg( driverName,
QString::fromUtf8( CPLGetLastErrorMsg() ) );
mError = ErrDriverNotFound;
return;
}
MetaData metadata;
bool metadataFound = driverMetadata( driverName, metadata );
if ( mOgrDriverName == QLatin1String( "ESRI Shapefile" ) )
{
if ( layerOptions.join( QString() ).toUpper().indexOf( QLatin1String( "ENCODING=" ) ) == -1 )
{
layerOptions.append( "ENCODING=" + convertCodecNameForEncodingOption( fileEncoding ) );
}
if ( driverName == QLatin1String( "ESRI Shapefile" ) && !vectorFileName.endsWith( QLatin1String( ".shp" ), Qt::CaseInsensitive ) )
{
vectorFileName += QLatin1String( ".shp" );
}
else if ( driverName == QLatin1String( "DBF file" ) && !vectorFileName.endsWith( QLatin1String( ".dbf" ), Qt::CaseInsensitive ) )
{
vectorFileName += QLatin1String( ".dbf" );
}
if ( action == CreateOrOverwriteFile || action == CreateOrOverwriteLayer )
deleteShapeFile( vectorFileName );
}
else
{
if ( metadataFound )
{
QStringList allExts = metadata.ext.split( ' ', QString::SkipEmptyParts );
bool found = false;
const auto constAllExts = allExts;
for ( const QString &ext : constAllExts )
{
if ( vectorFileName.endsWith( '.' + ext, Qt::CaseInsensitive ) )
{
found = true;
break;
}
}
if ( !found )
{
vectorFileName += '.' + allExts[0];
}
}
if ( action == CreateOrOverwriteFile )
{
if ( vectorFileName.endsWith( QLatin1String( ".gdb" ), Qt::CaseInsensitive ) )
{
QDir dir( vectorFileName );
if ( dir.exists() )
{
QFileInfoList fileList = dir.entryInfoList(
QDir::NoDotAndDotDot | QDir::System | QDir::Hidden | QDir::AllDirs | QDir::Files, QDir::DirsFirst );
const auto constFileList = fileList;
for ( const QFileInfo &info : constFileList )
{
QFile::remove( info.absoluteFilePath() );
}
}
QDir().rmdir( vectorFileName );
}
else
{
QFile::remove( vectorFileName );
}
}
}
if ( metadataFound && !metadata.compulsoryEncoding.isEmpty() )
{
if ( fileEncoding.compare( metadata.compulsoryEncoding, Qt::CaseInsensitive ) != 0 )
{
QgsDebugMsg( QStringLiteral( "forced %1 encoding for %2" ).arg( metadata.compulsoryEncoding, driverName ) );
fileEncoding = metadata.compulsoryEncoding;
}
}
char **options = nullptr;
if ( !datasourceOptions.isEmpty() )
{
options = new char *[ datasourceOptions.size() + 1 ];
for ( int i = 0; i < datasourceOptions.size(); i++ )
{
QgsDebugMsg( QStringLiteral( "-dsco=%1" ).arg( datasourceOptions[i] ) );
options[i] = CPLStrdup( datasourceOptions[i].toLocal8Bit().constData() );
}
options[ datasourceOptions.size()] = nullptr;
}
mAttrIdxToOgrIdx.remove( 0 );
// create the data source
if ( action == CreateOrOverwriteFile )
mDS.reset( OGR_Dr_CreateDataSource( poDriver, vectorFileName.toUtf8().constData(), options ) );
else
mDS.reset( myOGROpen( vectorFileName.toUtf8().constData(), TRUE, nullptr ) );
if ( options )
{
for ( int i = 0; i < datasourceOptions.size(); i++ )
CPLFree( options[i] );
delete [] options;
options = nullptr;
}
if ( !mDS )
{
mError = ErrCreateDataSource;
if ( action == CreateOrOverwriteFile )
mErrorMessage = QObject::tr( "Creation of data source failed (OGR error: %1)" )
.arg( QString::fromUtf8( CPLGetLastErrorMsg() ) );
else
mErrorMessage = QObject::tr( "Opening of data source in update mode failed (OGR error: %1)" )
.arg( QString::fromUtf8( CPLGetLastErrorMsg() ) );
return;
}
QString layerName( layerNameIn );
if ( layerName.isEmpty() )
layerName = QFileInfo( vectorFileName ).baseName();
if ( action == CreateOrOverwriteLayer )
{
const int layer_count = OGR_DS_GetLayerCount( mDS.get() );
for ( int i = 0; i < layer_count; i++ )
{
OGRLayerH hLayer = OGR_DS_GetLayer( mDS.get(), i );
if ( EQUAL( OGR_L_GetName( hLayer ), layerName.toUtf8().constData() ) )
{
if ( OGR_DS_DeleteLayer( mDS.get(), i ) != OGRERR_NONE )
{
mError = ErrCreateLayer;
mErrorMessage = QObject::tr( "Overwriting of existing layer failed (OGR error: %1)" )
.arg( QString::fromUtf8( CPLGetLastErrorMsg() ) );
return;
}
break;
}
}
}
if ( action == CreateOrOverwriteFile )
{
QgsDebugMsg( QStringLiteral( "Created data source" ) );
}
else
{
QgsDebugMsg( QStringLiteral( "Opened data source in update mode" ) );
}
// use appropriate codec
mCodec = QTextCodec::codecForName( fileEncoding.toLocal8Bit().constData() );
if ( !mCodec )
{
QgsDebugMsg( "error finding QTextCodec for " + fileEncoding );
QgsSettings settings;
QString enc = settings.value( QStringLiteral( "UI/encoding" ), "System" ).toString();
mCodec = QTextCodec::codecForName( enc.toLocal8Bit().constData() );
if ( !mCodec )
{
QgsDebugMsg( "error finding QTextCodec for " + enc );
mCodec = QTextCodec::codecForLocale();
Q_ASSERT( mCodec );
}
}
// consider spatial reference system of the layer
if ( driverName == QLatin1String( "KML" ) || driverName == QLatin1String( "GPX" ) )
{
if ( srs.authid() != QStringLiteral( "EPSG:4326" ) )
{
// Those drivers outputs WGS84 geometries, let's align our output CRS to have QGIS take charge of geometry transformation
QgsCoordinateReferenceSystem wgs84 = QgsCoordinateReferenceSystem::fromEpsgId( 4326 );
mCoordinateTransform.reset( new QgsCoordinateTransform( srs, wgs84, transformContext ) );
srs = wgs84;
}
}
if ( srs.isValid() )
{
QString srsWkt = srs.toWkt( QgsCoordinateReferenceSystem::WKT_PREFERRED_GDAL );
QgsDebugMsg( "WKT to save as is " + srsWkt );
mOgrRef = OSRNewSpatialReference( srsWkt.toLocal8Bit().constData() );
#if GDAL_VERSION_MAJOR >= 3
if ( mOgrRef )
{
OSRSetAxisMappingStrategy( mOgrRef, OAMS_TRADITIONAL_GIS_ORDER );
}
#endif
}
// datasource created, now create the output layer
OGRwkbGeometryType wkbType = ogrTypeFromWkbType( geometryType );
// Remove FEATURE_DATASET layer option (used for ESRI File GDB driver) if its value is not set
int optIndex = layerOptions.indexOf( QStringLiteral( "FEATURE_DATASET=" ) );
if ( optIndex != -1 )
{
layerOptions.removeAt( optIndex );
}
if ( !layerOptions.isEmpty() )
{
options = new char *[ layerOptions.size() + 1 ];
for ( int i = 0; i < layerOptions.size(); i++ )
{
QgsDebugMsg( QStringLiteral( "-lco=%1" ).arg( layerOptions[i] ) );
options[i] = CPLStrdup( layerOptions[i].toLocal8Bit().constData() );
}
options[ layerOptions.size()] = nullptr;
}
// disable encoding conversion of OGR Shapefile layer
CPLSetConfigOption( "SHAPE_ENCODING", "" );
if ( action == CreateOrOverwriteFile || action == CreateOrOverwriteLayer )
{
mLayer = OGR_DS_CreateLayer( mDS.get(), layerName.toUtf8().constData(), mOgrRef, wkbType, options );
if ( newLayer && mLayer )
{
*newLayer = OGR_L_GetName( mLayer );
if ( driverName == QLatin1String( "GPX" ) )
{
// See logic in GDAL ogr/ogrsf_frmts/gpx/ogrgpxdatasource.cpp ICreateLayer()
switch ( QgsWkbTypes::flatType( geometryType ) )
{
case QgsWkbTypes::Point:
{
if ( !EQUAL( layerName.toUtf8().constData(), "track_points" ) &&
!EQUAL( layerName.toUtf8().constData(), "route_points" ) )
{
*newLayer = QStringLiteral( "waypoints" );
}
}
break;
case QgsWkbTypes::LineString:
{
const char *pszForceGPXTrack
= CSLFetchNameValue( options, "FORCE_GPX_TRACK" );
if ( pszForceGPXTrack && CPLTestBool( pszForceGPXTrack ) )
*newLayer = QStringLiteral( "tracks" );
else
*newLayer = QStringLiteral( "routes" );
}
break;
case QgsWkbTypes::MultiLineString:
{
const char *pszForceGPXRoute
= CSLFetchNameValue( options, "FORCE_GPX_ROUTE" );
if ( pszForceGPXRoute && CPLTestBool( pszForceGPXRoute ) )
*newLayer = QStringLiteral( "routes" );
else
*newLayer = QStringLiteral( "tracks" );
}
break;
default:
break;
}
}
}
}
else if ( driverName == QLatin1String( "DGN" ) )
{
mLayer = OGR_DS_GetLayerByName( mDS.get(), "elements" );
}
else
{
mLayer = OGR_DS_GetLayerByName( mDS.get(), layerName.toUtf8().constData() );
}
if ( options )
{
for ( int i = 0; i < layerOptions.size(); i++ )
CPLFree( options[i] );
delete [] options;
options = nullptr;
}
if ( srs.isValid() )
{
if ( mOgrDriverName == QLatin1String( "ESRI Shapefile" ) )
{
QString layerName = vectorFileName.left( vectorFileName.indexOf( QLatin1String( ".shp" ), Qt::CaseInsensitive ) );
QFile prjFile( layerName + ".qpj" );
#if PROJ_VERSION_MAJOR<6
if ( prjFile.open( QIODevice::WriteOnly | QIODevice::Truncate ) )
{
QTextStream prjStream( &prjFile );
prjStream << srs.toWkt().toLocal8Bit().constData() << endl;
prjFile.close();
}
else
{
QgsDebugMsg( "Couldn't open file " + layerName + ".qpj" );
}
#else
if ( prjFile.exists() )
prjFile.remove();
#endif
}
}
if ( !mLayer )
{
if ( action == CreateOrOverwriteFile || action == CreateOrOverwriteLayer )
mErrorMessage = QObject::tr( "Creation of layer failed (OGR error: %1)" )
.arg( QString::fromUtf8( CPLGetLastErrorMsg() ) );
else
mErrorMessage = QObject::tr( "Opening of layer failed (OGR error: %1)" )
.arg( QString::fromUtf8( CPLGetLastErrorMsg() ) );
mError = ErrCreateLayer;
return;
}
OGRFeatureDefnH defn = OGR_L_GetLayerDefn( mLayer );
QgsDebugMsg( QStringLiteral( "created layer" ) );
// create the fields
QgsDebugMsg( "creating " + QString::number( fields.size() ) + " fields" );
mFields = fields;
mAttrIdxToOgrIdx.clear();
QSet<int> existingIdxs;
mFieldValueConverter = fieldValueConverter;
switch ( action )
{
case CreateOrOverwriteFile:
case CreateOrOverwriteLayer:
case AppendToLayerAddFields:
{
for ( int fldIdx = 0; fldIdx < fields.count(); ++fldIdx )
{
QgsField attrField = fields.at( fldIdx );
if ( fieldValueConverter )
{
attrField = fieldValueConverter->fieldDefinition( fields.at( fldIdx ) );
}
QString name( attrField.name() );
if ( action == AppendToLayerAddFields )
{
int ogrIdx = OGR_FD_GetFieldIndex( defn, mCodec->fromUnicode( name ) );
if ( ogrIdx >= 0 )
{
mAttrIdxToOgrIdx.insert( fldIdx, ogrIdx );
continue;
}
}
OGRFieldType ogrType = OFTString; //default to string
int ogrWidth = attrField.length();
int ogrPrecision = attrField.precision();
if ( ogrPrecision > 0 )
++ogrWidth;
switch ( attrField.type() )
{
case QVariant::LongLong:
{
const char *pszDataTypes = GDALGetMetadataItem( poDriver, GDAL_DMD_CREATIONFIELDDATATYPES, nullptr );
if ( pszDataTypes && strstr( pszDataTypes, "Integer64" ) )
ogrType = OFTInteger64;
else
ogrType = OFTReal;
ogrWidth = ogrWidth > 0 && ogrWidth <= 20 ? ogrWidth : 20;
ogrPrecision = 0;
break;
}
case QVariant::String:
ogrType = OFTString;
if ( ( ogrWidth <= 0 || ogrWidth > 255 ) && mOgrDriverName == QLatin1String( "ESRI Shapefile" ) )
ogrWidth = 255;
break;
case QVariant::Int:
ogrType = OFTInteger;
ogrWidth = ogrWidth > 0 && ogrWidth <= 10 ? ogrWidth : 10;
ogrPrecision = 0;
break;
case QVariant::Bool:
ogrType = OFTInteger;
ogrWidth = 1;
ogrPrecision = 0;
break;
case QVariant::Double:
ogrType = OFTReal;
break;
case QVariant::Date:
ogrType = OFTDate;
break;
case QVariant::Time:
if ( mOgrDriverName == QLatin1String( "ESRI Shapefile" ) )
{
ogrType = OFTString;
ogrWidth = 12; // %02d:%02d:%06.3f
}
else
{
ogrType = OFTTime;
}
break;
case QVariant::DateTime:
if ( mOgrDriverName == QLatin1String( "ESRI Shapefile" ) )
{
ogrType = OFTString;
ogrWidth = 24; // "%04d/%02d/%02d %02d:%02d:%06.3f"
}
else
{
ogrType = OFTDateTime;
}
break;
case QVariant::ByteArray:
ogrType = OFTBinary;
break;
#if GDAL_VERSION_NUM >= GDAL_COMPUTE_VERSION(2,4,0)
case QVariant::List:
// only string list supported at the moment, fall through to default for other types
if ( attrField.subType() == QVariant::String )
{
const char *pszDataTypes = GDALGetMetadataItem( poDriver, GDAL_DMD_CREATIONFIELDDATATYPES, nullptr );
if ( pszDataTypes && strstr( pszDataTypes, "StringList" ) )
{
ogrType = OFTStringList;
supportsStringList = true;
}
else
{
ogrType = OFTString;
ogrWidth = 255;
}
break;
}
//intentional fall-through
FALLTHROUGH
#endif
default:
//assert(0 && "invalid variant type!");
mErrorMessage = QObject::tr( "Unsupported type for field %1" )
.arg( attrField.name() );
mError = ErrAttributeTypeUnsupported;
return;
}
if ( mOgrDriverName == QLatin1String( "SQLite" ) && name.compare( QLatin1String( "ogc_fid" ), Qt::CaseInsensitive ) == 0 )
{
int i;
for ( i = 0; i < 10; i++ )
{
name = QStringLiteral( "ogc_fid%1" ).arg( i );
int j;
for ( j = 0; j < fields.size() && name.compare( fields.at( j ).name(), Qt::CaseInsensitive ) != 0; j++ )
;
if ( j == fields.size() )
break;
}
if ( i == 10 )
{
mErrorMessage = QObject::tr( "No available replacement for internal fieldname ogc_fid found" ).arg( attrField.name() );
mError = ErrAttributeCreationFailed;
return;
}
QgsMessageLog::logMessage( QObject::tr( "Reserved attribute name ogc_fid replaced with %1" ).arg( name ), QObject::tr( "OGR" ) );
}
// create field definition
gdal::ogr_field_def_unique_ptr fld( OGR_Fld_Create( mCodec->fromUnicode( name ), ogrType ) );
if ( ogrWidth > 0 )
{
OGR_Fld_SetWidth( fld.get(), ogrWidth );
}
if ( ogrPrecision >= 0 )
{
OGR_Fld_SetPrecision( fld.get(), ogrPrecision );
}
switch ( attrField.type() )
{
case QVariant::Bool:
OGR_Fld_SetSubType( fld.get(), OFSTBoolean );
break;
default:
break;
}
// create the field
QgsDebugMsg( "creating field " + attrField.name() +
" type " + QString( QVariant::typeToName( attrField.type() ) ) +
" width " + QString::number( ogrWidth ) +
" precision " + QString::number( ogrPrecision ) );
if ( OGR_L_CreateField( mLayer, fld.get(), true ) != OGRERR_NONE )
{
QgsDebugMsg( "error creating field " + attrField.name() );
mErrorMessage = QObject::tr( "Creation of field %1 failed (OGR error: %2)" )
.arg( attrField.name(),
QString::fromUtf8( CPLGetLastErrorMsg() ) );
mError = ErrAttributeCreationFailed;
return;
}
int ogrIdx = OGR_FD_GetFieldIndex( defn, mCodec->fromUnicode( name ) );
QgsDebugMsg( QStringLiteral( "returned field index for %1: %2" ).arg( name ).arg( ogrIdx ) );
if ( ogrIdx < 0 || existingIdxs.contains( ogrIdx ) )
{
// GDAL 1.7 not just truncates, but launders more aggressivly.
ogrIdx = OGR_FD_GetFieldCount( defn ) - 1;
if ( ogrIdx < 0 )
{
QgsDebugMsg( "error creating field " + attrField.name() );
mErrorMessage = QObject::tr( "Created field %1 not found (OGR error: %2)" )
.arg( attrField.name(),
QString::fromUtf8( CPLGetLastErrorMsg() ) );
mError = ErrAttributeCreationFailed;
return;
}
}
existingIdxs.insert( ogrIdx );
mAttrIdxToOgrIdx.insert( fldIdx, ogrIdx );
}
}
break;
case AppendToLayerNoNewFields:
{
for ( int fldIdx = 0; fldIdx < fields.count(); ++fldIdx )
{
QgsField attrField = fields.at( fldIdx );
QString name( attrField.name() );
int ogrIdx = OGR_FD_GetFieldIndex( defn, mCodec->fromUnicode( name ) );
if ( ogrIdx >= 0 )
mAttrIdxToOgrIdx.insert( fldIdx, ogrIdx );
}
}
break;
}
// Geopackages require a unique feature id. If the input feature stream cannot guarantee
// the uniqueness of the FID column, we drop it and let OGR generate new ones
if ( sinkFlags.testFlag( QgsFeatureSink::RegeneratePrimaryKey ) && driverName == QLatin1String( "GPKG" ) )
{
int fidIdx = fields.lookupField( QStringLiteral( "FID" ) );
if ( fidIdx >= 0 )
mAttrIdxToOgrIdx.remove( fidIdx );
}
QgsDebugMsg( QStringLiteral( "Done creating fields" ) );
mWkbType = geometryType;
if ( newFilename )
*newFilename = vectorFileName;
// enabling transaction on databases that support it
mUsingTransaction = true;
if ( OGRERR_NONE != OGR_L_StartTransaction( mLayer ) )
{
mUsingTransaction = false;
}
}
OGRGeometryH QgsVectorFileWriter::createEmptyGeometry( QgsWkbTypes::Type wkbType )
{
return OGR_G_CreateGeometry( ogrTypeFromWkbType( wkbType ) );
}
///@cond PRIVATE
class QgsVectorFileWriterMetadataContainer
{
public:
QgsVectorFileWriterMetadataContainer()
{
QMap<QString, QgsVectorFileWriter::Option *> datasetOptions;
QMap<QString, QgsVectorFileWriter::Option *> layerOptions;
// Arc/Info ASCII Coverage
datasetOptions.clear();
layerOptions.clear();
driverMetadata.insert( QStringLiteral( "AVCE00" ),
QgsVectorFileWriter::MetaData(
QStringLiteral( "Arc/Info ASCII Coverage" ),
QObject::tr( "Arc/Info ASCII Coverage" ),
QStringLiteral( "*.e00" ),
QStringLiteral( "e00" ),
datasetOptions,
layerOptions
)
);
// Atlas BNA
datasetOptions.clear();
layerOptions.clear();
datasetOptions.insert( QStringLiteral( "LINEFORMAT" ), new QgsVectorFileWriter::SetOption(
QObject::tr( "New BNA files are created by the "
"systems default line termination conventions. "
"This may be overridden here." ),
QStringList()
<< QStringLiteral( "CRLF" )
<< QStringLiteral( "LF" ),
QString(), // Default value
true // Allow None
) );
datasetOptions.insert( QStringLiteral( "MULTILINE" ), new QgsVectorFileWriter::BoolOption(
QObject::tr( "By default, BNA files are created in multi-line format. "
"For each record, the first line contains the identifiers and the "
"type/number of coordinates to follow. Each following line contains "
"a pair of coordinates." ),
true // Default value
) );
datasetOptions.insert( QStringLiteral( "NB_IDS" ), new QgsVectorFileWriter::SetOption(
QObject::tr( "BNA records may contain from 2 to 4 identifiers per record. "
"Some software packages only support a precise number of identifiers. "
"You can override the default value (2) by a precise value." ),
QStringList()
<< QStringLiteral( "2" )
<< QStringLiteral( "3" )
<< QStringLiteral( "4" )
<< QStringLiteral( "NB_SOURCE_FIELDS" ),
QStringLiteral( "2" ) // Default value
) );
datasetOptions.insert( QStringLiteral( "ELLIPSES_AS_ELLIPSES" ), new QgsVectorFileWriter::BoolOption(
QObject::tr( "The BNA writer will try to recognize ellipses and circles when writing a polygon. "
"This will only work if the feature has previously been read from a BNA file. "
"As some software packages do not support ellipses/circles in BNA data file, "
"it may be useful to tell the writer by specifying ELLIPSES_AS_ELLIPSES=NO not "
"to export them as such, but keep them as polygons." ),
true // Default value
) );
datasetOptions.insert( QStringLiteral( "NB_PAIRS_PER_LINE" ), new QgsVectorFileWriter::IntOption(
QObject::tr( "Limit the number of coordinate pairs per line in multiline format." ),
2 // Default value
) );
datasetOptions.insert( QStringLiteral( "COORDINATE_PRECISION" ), new QgsVectorFileWriter::IntOption(
QObject::tr( "Set the number of decimal for coordinates. Default value is 10." ),
10 // Default value
) );
driverMetadata.insert( QStringLiteral( "BNA" ),
QgsVectorFileWriter::MetaData(
QStringLiteral( "Atlas BNA" ),
QObject::tr( "Atlas BNA" ),
QStringLiteral( "*.bna" ),
QStringLiteral( "bna" ),
datasetOptions,
layerOptions
)
);
// Comma Separated Value
datasetOptions.clear();
layerOptions.clear();
layerOptions.insert( QStringLiteral( "LINEFORMAT" ), new QgsVectorFileWriter::SetOption(
QObject::tr( "By default when creating new .csv files they "
"are created with the line termination conventions "
"of the local platform (CR/LF on Win32 or LF on all other systems). "
"This may be overridden through the use of the LINEFORMAT option." ),
QStringList()
<< QStringLiteral( "CRLF" )
<< QStringLiteral( "LF" ),
QString(), // Default value
true // Allow None
) );
layerOptions.insert( QStringLiteral( "GEOMETRY" ), new QgsVectorFileWriter::SetOption(
QObject::tr( "By default, the geometry of a feature written to a .csv file is discarded. "
"It is possible to export the geometry in its WKT representation by "
"specifying GEOMETRY=AS_WKT. It is also possible to export point geometries "
"into their X,Y,Z components by specifying GEOMETRY=AS_XYZ, GEOMETRY=AS_XY "
"or GEOMETRY=AS_YX." ),
QStringList()
<< QStringLiteral( "AS_WKT" )
<< QStringLiteral( "AS_XYZ" )
<< QStringLiteral( "AS_XY" )
<< QStringLiteral( "AS_YX" ),
QString(), // Default value
true // Allow None
) );
layerOptions.insert( QStringLiteral( "CREATE_CSVT" ), new QgsVectorFileWriter::BoolOption(
QObject::tr( "Create the associated .csvt file to describe the type of each "
"column of the layer and its optional width and precision." ),
false // Default value
) );
layerOptions.insert( QStringLiteral( "SEPARATOR" ), new QgsVectorFileWriter::SetOption(
QObject::tr( "Field separator character." ),
QStringList()
<< QStringLiteral( "COMMA" )
<< QStringLiteral( "SEMICOLON" )
<< QStringLiteral( "TAB" ),
QStringLiteral( "COMMA" ) // Default value
) );
#if defined(GDAL_COMPUTE_VERSION) && GDAL_VERSION_NUM >= GDAL_COMPUTE_VERSION(2,3,0)
layerOptions.insert( QStringLiteral( "STRING_QUOTING" ), new QgsVectorFileWriter::SetOption(
QObject::tr( "Double-quote strings. IF_AMBIGUOUS means that string values that look like numbers will be quoted." ),
QStringList()
<< QStringLiteral( "IF_NEEDED" )
<< QStringLiteral( "IF_AMBIGUOUS" )
<< QStringLiteral( "ALWAYS" ),
QStringLiteral( "IF_AMBIGUOUS" ) // Default value
) );
#endif
layerOptions.insert( QStringLiteral( "WRITE_BOM" ), new QgsVectorFileWriter::BoolOption(
QObject::tr( "Write a UTF-8 Byte Order Mark (BOM) at the start of the file." ),
false // Default value
) );
driverMetadata.insert( QStringLiteral( "CSV" ),
QgsVectorFileWriter::MetaData(
QStringLiteral( "Comma Separated Value [CSV]" ),
QObject::tr( "Comma Separated Value [CSV]" ),
QStringLiteral( "*.csv" ),