def createAccessor(self):
if (not self.filename and hasattr(self, 'metadatalocation')
and self.metadatalocation
and not self.accessMode.lower().count('write')):
#it will only keep going if all ok
self.filename = self.checkLocation()
caster = '' or self.caster
filename = self.filename
scheme = self.scheme
self.extraFilename = self.filename + '.' + self._extra_reader
if self._accessor is None: #to avoid creating duplicates
selection = self.methodSelector()
if selection == 'api':
size = DA.getTypeSize(self.dataType)
#to optimize bip access per band we read in memory all bands and then
#set the right band and write the content back leaving the other bands untouched
#this requires a read and write which only works if the file is opened in
#writeread (or readwrite) mode and not just write
if (self.accessMode.lower() == 'write'):
#if(self.scheme.lower() == 'bip' and self.accessMode.lower() == 'write'):
self.accessMode = 'writeread'
elif selection == self._extra_reader:
size = self.getGDALDataTypeId(self.dataType)
filename = self._extraFilename
#GDALAccessor handles all the different scheme in the same way since it reads
#always in BSQ scheme regardless of the under laying scheme
scheme = 'GDAL'
else:
print('Cannot select appropruiate image API')
raise Exception
self._accessor, self._factory = DA.createAccessor(
filename, self.accessMode, size, self.bands, self.width,
scheme, caster, self._extraInfo)
return None
def createAccessor(self):
if self._accessor is None: #to avoid to creating duplicates
size = DA.getTypeSize(self.dataType)
caster = '' or self.caster
self._accessor, self._factory = DA.createAccessor(
self.filename, self.accessMode, size, self.bands, self.width,
self.scheme, caster)
return None
