def _slice_predicate(self,
columns,
column_start,
column_finish,
column_reversed,
column_count,
super_column=None,
pack=True):
is_supercol_name = self.super and super_column is None
if columns is not None:
packed_cols = []
for col in columns:
packed_cols.append(
self._pack_name(col, is_supercol_name=is_supercol_name))
return SlicePredicate(column_names=packed_cols)
else:
if column_start != '' and pack:
column_start = self._pack_name(
column_start,
is_supercol_name=is_supercol_name,
slice_start=(not column_reversed))
if column_finish != '' and pack:
column_finish = self._pack_name(
column_finish,
is_supercol_name=is_supercol_name,
slice_start=column_reversed)
sr = SliceRange(start=column_start,
finish=column_finish,
reversed=column_reversed,
count=column_count)
return SlicePredicate(slice_range=sr)
def _create_slice_predicate(self,
columns,
column_start,
column_finish,
column_reversed,
column_count,
super_column=None):
is_supercol_name = self.super and super_column is None
if columns is not None:
packed_cols = []
for col in columns:
packed_cols.append(
self._pack_name(col, is_supercol_name=is_supercol_name))
return SlicePredicate(column_names=packed_cols)
else:
if column_start != '':
column_start = self._pack_name(
column_start,
is_supercol_name=is_supercol_name,
slice_end=_SLICE_START)
if column_finish != '':
column_finish = self._pack_name(
column_finish,
is_supercol_name=is_supercol_name,
slice_end=_SLICE_FINISH)
sr = SliceRange(start=column_start,
finish=column_finish,
reversed=column_reversed,
count=column_count)
return SlicePredicate(slice_range=sr)
def create_SlicePredicate(columns, column_start, column_finish,
column_reversed, column_count):
if columns is not None:
return SlicePredicate(column_names=columns)
sr = SliceRange(start=column_start,
finish=column_finish,
reversed=column_reversed,
count=column_count)
return SlicePredicate(slice_range=sr)