def createGeopkgLayer(self, filepath, featureIterator):
fields, geomAtt = self._fields()
qgsfields = QgsFields()
for f in fields:
qgsfields.append(f)
writer = QgsVectorFileWriter(
filepath,
"UTF-8",
qgsfields,
FeatureTypeHelper.typeNameConverter[geomAtt.type.lower()],
QgsCoordinateReferenceSystem(geomAtt.SRS),
driverName="GPKG")
BATCHSIZE = 500
def _batch(iterable, size):
sourceiter = iter(iterable)
while True:
batchiter = islice(sourceiter, size)
try:
yield chain([next(batchiter)], batchiter)
except StopIteration:
return
for batch in _batch(featureIterator, BATCHSIZE):
success = writer.addFeatures(batch)
if not success:
error = writer.errorMessage()
del writer
raise Exception("geopkg save: " + error)
writer.flushBuffer()
# the only way to close the writer is to call the C++ destructor -- we use sip to do this
sip.delete(writer)
del writer # remove from python
addAuditTables(filepath)
