def _make_feature(self, feat_id):
"""
Helper routine for __getitem__ that constructs a Feature from the given
Feature ID. If the OGR Layer does not support random-access reading,
then each feature of the layer will be incremented through until the
a Feature is found matching the given feature ID.
"""
if self._random_read:
# If the Layer supports random reading, return.
with suppress(GDALException):
return Feature(capi.get_feature(self.ptr, feat_id), self)
else:
# Random access isn't supported, have to increment through
# each feature until the given feature ID is encountered.
for feat in self:
if feat.fid == feat_id:
return feat
# Should have returned a Feature, raise an OGRIndexError.
raise OGRIndexError('Invalid feature id: %s.' % feat_id)
def _make_feature(self, feat_id):
"""
Helper routine for __getitem__ that constructs a Feature from the given
Feature ID. If the OGR Layer does not support random-access reading,
then each feature of the layer will be incremented through until the
a Feature is found matching the given feature ID.
"""
if self._random_read:
# If the Layer supports random reading, return.
with suppress(GDALException):
return Feature(capi.get_feature(self.ptr, feat_id), self)
else:
# Random access isn't supported, have to increment through
# each feature until the given feature ID is encountered.
for feat in self:
if feat.fid == feat_id:
return feat
# Should have returned a Feature, raise an IndexError.
raise IndexError('Invalid feature id: %s.' % feat_id)
def _make_feature(self, feat_id):
"""
Helper routine for __getitem__ that constructs a Feature from the given
Feature ID. If the OGR Layer does not support random-access reading,
then each feature of the layer will be incremented through until the
a Feature is found matching the given feature ID.
"""
if self._random_read:
# If the Layer supports random reading, return.
try:
return Feature(capi.get_feature(self.ptr, feat_id), self)
except GDALException:
pass
else:
# Random access isn't supported, have to increment through
# each feature until the given feature ID is encountered.
for feat in self:
if feat.fid == feat_id:
return feat
def _make_feature(self, offset):
"Helper routine for __getitem__ that makes a feature from an offset."
return Feature(get_feature(self._ptr, offset), self._ldefn)
def _make_feature(self, offset):
"Helper routine for __getitem__ that makes a feature from an offset."
return Feature(get_feature(self._ptr, offset), self._ldefn)
def __iter__(self):
# adpted from Layer.__iter__
for pk in self._pkorder:
rawft = capi.get_feature(self._ptr, self._pk2ftnum[pk])
yield Feature(rawft, self._ldefn)
from ctypes import byref, c_double
