def getOgrCompatibleSource(self, parameter_name, parameters, context, feedback, executing): """ Interprets a parameter as an OGR compatible source and layer name :param executing: """ if not executing and parameter_name in parameters and isinstance(parameters[parameter_name], QgsProcessingFeatureSourceDefinition): # if not executing, then we throw away all 'selected features only' settings # since these have no meaning for command line gdal use, and we don't want to force # an export of selected features only to a temporary file just to show the command! parameters = {parameter_name: parameters[parameter_name].source} input_layer = self.parameterAsVectorLayer(parameters, parameter_name, context) ogr_data_path = None ogr_layer_name = None if input_layer is None or input_layer.dataProvider().name() == 'memory': if executing: # parameter is not a vector layer - try to convert to a source compatible with OGR # and extract selection if required ogr_data_path = self.parameterAsCompatibleSourceLayerPath(parameters, parameter_name, context, QgsVectorFileWriter.supportedFormatExtensions(), QgsVectorFileWriter.supportedFormatExtensions()[0], feedback=feedback) ogr_layer_name = GdalUtils.ogrLayerName(ogr_data_path) else: # not executing - don't waste time converting incompatible sources, just return dummy strings # for the command preview (since the source isn't compatible with OGR, it has no meaning anyway and can't # be run directly in the command line) ogr_data_path = 'path_to_data_file' ogr_layer_name = 'layer_name' elif input_layer.dataProvider().name() == 'ogr': if executing and (isinstance(parameters[parameter_name], QgsProcessingFeatureSourceDefinition) and parameters[parameter_name].selectedFeaturesOnly) \ or input_layer.subsetString(): # parameter is a vector layer, with OGR data provider # so extract selection if required ogr_data_path = self.parameterAsCompatibleSourceLayerPath(parameters, parameter_name, context, QgsVectorFileWriter.supportedFormatExtensions(), feedback=feedback) parts = QgsProviderRegistry.instance().decodeUri('ogr', ogr_data_path) ogr_data_path = parts['path'] if 'layerName' in parts and parts['layerName']: ogr_layer_name = parts['layerName'] else: ogr_layer_name = GdalUtils.ogrLayerName(ogr_data_path) else: # either not using the selection, or # not executing - don't worry about 'selected features only' handling. It has no meaning # for the command line preview since it has no meaning outside of a QGIS session! ogr_data_path = GdalUtils.ogrConnectionStringAndFormatFromLayer(input_layer)[0] ogr_layer_name = GdalUtils.ogrLayerName(input_layer.dataProvider().dataSourceUri()) elif input_layer.dataProvider().name().lower() == 'wfs': uri = QgsDataSourceUri(input_layer.source()) baseUrl = uri.param('url').split('?')[0] ogr_data_path = "WFS:{}".format(baseUrl) ogr_layer_name = uri.param('typename') else: # vector layer, but not OGR - get OGR compatible path # TODO - handle "selected features only" mode!! ogr_data_path = GdalUtils.ogrConnectionStringFromLayer(input_layer) ogr_layer_name = GdalUtils.ogrLayerName(input_layer.dataProvider().dataSourceUri()) return ogr_data_path, ogr_layer_name
def getOgrCompatibleSource(self, parameter_name, parameters, context, feedback, executing): """ Interprets a parameter as an OGR compatible source and layer name :param executing: """ if not executing and parameter_name in parameters and isinstance(parameters[parameter_name], QgsProcessingFeatureSourceDefinition): # if not executing, then we throw away all 'selected features only' settings # since these have no meaning for command line gdal use, and we don't want to force # an export of selected features only to a temporary file just to show the command! parameters = {parameter_name: parameters[parameter_name].source} input_layer = self.parameterAsVectorLayer(parameters, parameter_name, context) ogr_data_path = None ogr_layer_name = None if input_layer is None or input_layer.dataProvider().name() == 'memory': if executing: # parameter is not a vector layer - try to convert to a source compatible with OGR # and extract selection if required ogr_data_path = self.parameterAsCompatibleSourceLayerPath(parameters, parameter_name, context, QgsVectorFileWriter.supportedFormatExtensions(), feedback=feedback) ogr_layer_name = GdalUtils.ogrLayerName(ogr_data_path) else: #not executing - don't waste time converting incompatible sources, just return dummy strings #for the command preview (since the source isn't compatible with OGR, it has no meaning anyway and can't #be run directly in the command line) ogr_data_path = 'path_to_data_file' ogr_layer_name = 'layer_name' elif input_layer.dataProvider().name() == 'ogr': if executing and isinstance(parameters[parameter_name], QgsProcessingFeatureSourceDefinition) and parameters[parameter_name].selectedFeaturesOnly: # parameter is a vector layer, with OGR data provider # so extract selection if required ogr_data_path = self.parameterAsCompatibleSourceLayerPath(parameters, parameter_name, context, QgsVectorFileWriter.supportedFormatExtensions(), feedback=feedback) parts = QgsProviderRegistry.instance().decodeUri('ogr', ogr_data_path) ogr_data_path = parts['path'] if 'layerName' in parts and parts['layerName']: ogr_layer_name = parts['layerName'] else: ogr_layer_name = GdalUtils.ogrLayerName(ogr_data_path) else: #either not using the selection, or #not executing - don't worry about 'selected features only' handling. It has no meaning #for the command line preview since it has no meaning outside of a QGIS session! ogr_data_path = GdalUtils.ogrConnectionStringAndFormatFromLayer(input_layer)[0] ogr_layer_name = GdalUtils.ogrLayerName(input_layer.dataProvider().dataSourceUri()) else: # vector layer, but not OGR - get OGR compatible path # TODO - handle "selected features only" mode!! ogr_data_path = GdalUtils.ogrConnectionStringFromLayer(input_layer) ogr_layer_name = GdalUtils.ogrLayerName(input_layer.dataProvider().dataSourceUri()) return ogr_data_path, ogr_layer_name