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Handle gpkg vectors and rasters with ogr data items

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This commit is contained in:
Alessandro Pasotti 2017-09-18 10:42:55 +02:00
parent 6bc1d1f7d6
commit 7cf26369c4
2 changed files with 51 additions and 19 deletions
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29
src/providers/gdal/qgsgdaldataitems.cpp
View File

@ -241,12 +241,32 @@ QGISEXTERN QgsDataItem *dataItem( QString path, QgsDataItem *parentItem )
#endif
}
// Filters out the OGR/GDAL supported formats that can contain multiple layers
// and should be treated like a DB: GeoPackage and SQLite
// NOTE: this formats are scanned for rasters too and they are handled
// by the "ogr" provider. For this reason they must
// be skipped by "gdal" provider or the rasters will be listed
// twice. ogrSupportedDbLayersExtensions must be kept in sync
// with the companion variable (same name) in the ogr provider
// class
// TODO: add more OGR supported multiple layers formats here!
QStringList ogrSupportedDbLayersExtensions;
ogrSupportedDbLayersExtensions << QLatin1String( "gpkg" ) << QLatin1String( "sqlite" ) << QLatin1String( "db" );
QStringList ogrSupportedDbDriverNames;
ogrSupportedDbDriverNames << QLatin1String( "GPKG" ) << QLatin1String( "db" );
// return item without testing if:
// scanExtSetting
// or zipfile and scan zip == "Basic scan"
if ( scanExtSetting ||
( ( is_vsizip || is_vsitar ) && scanZipSetting == QLatin1String( "basic" ) ) )
{
// Skip this layer if it's handled by ogr:
if ( ogrSupportedDbLayersExtensions.contains( suffix ) )
{
return nullptr;
}
// if this is a VRT file make sure it is raster VRT to avoid duplicates
if ( suffix == QLatin1String( "vrt" ) )
{
@ -283,6 +303,15 @@ QGISEXTERN QgsDataItem *dataItem( QString path, QgsDataItem *parentItem )
return nullptr;
}
GDALDriverH hDriver = GDALGetDatasetDriver( hDS );
QString ogrDriverName = GDALGetDriverShortName( hDriver );
// Skip this layer if it's handled by ogr:
if ( ogrSupportedDbDriverNames.contains( ogrDriverName ) )
{
return nullptr;
}
QStringList sublayers = QgsGdalProvider::subLayers( hDS );
GDALClose( hDS );

41
src/providers/ogr/qgsogrdataitems.cpp
View File

@ -578,6 +578,8 @@ QGISEXTERN QgsDataItem *dataItem( QString path, QgsDataItem *parentItem )
// TODO: add more OGR supported multiple layers formats here!
QStringList ogrSupportedDbLayersExtensions;
ogrSupportedDbLayersExtensions << QLatin1String( "gpkg" ) << QLatin1String( "sqlite" ) << QLatin1String( "db" );
QStringList ogrSupportedDbDriverNames;
ogrSupportedDbDriverNames << QLatin1String( "GPKG" ) << QLatin1String( "db" );
// Fast track: return item without testing if:
// scanExtSetting or zipfile and scan zip == "Basic scan"
@ -624,13 +626,16 @@ QGISEXTERN QgsDataItem *dataItem( QString path, QgsDataItem *parentItem )
return item;
}
// Slow track: scan file contents
QgsDataItem *item = nullptr;
// test that file is valid with OGR
OGRRegisterAll();
GDALDriverH hDriver;
OGRSFDriverH hDriver;
// do not print errors, but write to debug
CPLPushErrorHandler( CPLQuietErrorHandler );
CPLErrorReset();
GDALDatasetH hDataSource = QgsOgrProviderUtils::GDALOpenWrapper( path.toUtf8().constData(), false, &hDriver );
OGRDataSourceH hDataSource = QgsOgrProviderUtils::GDALOpenWrapper( path.toUtf8().constData(), false, &hDriver );
CPLPopErrorHandler();
if ( ! hDataSource )
@ -639,26 +644,24 @@ QGISEXTERN QgsDataItem *dataItem( QString path, QgsDataItem *parentItem )
return nullptr;
}
QgsDebugMsgLevel( QString( "GDAL Driver : %1" ).arg( GDALGetDriverShortName( hDriver ) ), 2 );
QgsDataItem *item = nullptr;
QgsDebugMsgLevel( QString( "GDAL Driver : %1" ).arg( OGR_Dr_GetName( hDriver ) ), 2 );
QString ogrDriverName = OGR_Dr_GetName( hDriver );
int numLayers = OGR_DS_GetLayerCount( hDataSource );
if ( numLayers == 1 )
{
QgsDebugMsgLevel( QString( "using name = %1" ).arg( name ), 2 );
item = dataItemForLayer( parentItem, name, path, hDataSource, 0 );
}
else if ( numLayers > 1 )
{
QgsDebugMsgLevel( QString( "using name = %1" ).arg( name ), 2 );
item = new QgsOgrDataCollectionItem( parentItem, name, path );
}
else if ( suffix.compare( QLatin1String( "gpkg" ), Qt::CaseInsensitive ) == 0 )
// GeoPackage needs a specialized data item, mainly because of raster deletion not
// yet implemented in GDAL (2.2.1)
if ( ogrDriverName == QLatin1String( "GPKG" ) )
{
item = new QgsGeoPackageCollectionItem( parentItem, name, path );
}
GDALClose( hDataSource );
else if ( numLayers > 1 || ogrSupportedDbDriverNames.contains( ogrDriverName ) )
{
item = new QgsOgrDataCollectionItem( parentItem, name, path );
}
else
{
item = dataItemForLayer( parentItem, name, path, hDataSource, 0 );
}
OGR_DS_Destroy( hDataSource );
return item;
}