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# Copyright DataStax, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from cassandra.parsing cimport ParseDesc, ColumnParser
from cassandra.obj_parser import TupleRowParser
from cassandra.deserializers import make_deserializers
include "ioutils.pyx"
def make_recv_results_rows(ColumnParser colparser):
def recv_results_rows(self, f, int protocol_version, user_type_map, result_metadata):
"""
Parse protocol data given as a BytesIO f into a set of columns (e.g. list of tuples)
This is used as the recv_results_rows method of (Fast)ResultMessage
"""
self.recv_results_metadata(f, user_type_map)
column_metadata = self.column_metadata or result_metadata
self.column_names = [c[2] for c in column_metadata]
self.column_types = [c[3] for c in column_metadata]
desc = ParseDesc(self.column_names, self.column_types, make_deserializers(self.column_types),
protocol_version)
reader = BytesIOReader(f.read())
try:
self.parsed_rows = colparser.parse_rows(reader, desc)
except Exception as e:
# Use explicitly the TupleRowParser to display better error messages for column decoding failures
rowparser = TupleRowParser()
reader.buf_ptr = reader.buf
reader.pos = 0
rowcount = read_int(reader)
for i in range(rowcount):
rowparser.unpack_row(reader, desc)
return recv_results_rows
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