148 lines
3.9 KiB
Python
148 lines
3.9 KiB
Python
# Copyright 2013-2014 DataStax, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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log = logging.getLogger(__name__)
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from binascii import hexlify
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import calendar
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import datetime
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import sys
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import types
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from uuid import UUID
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import six
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from cassandra.util import OrderedDict
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if six.PY3:
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long = int
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def cql_quote(term):
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# The ordering of this method is important for the result of this method to
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# be a native str type (for both Python 2 and 3)
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# Handle quoting of native str and bool types
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if isinstance(term, (str, bool)):
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return "'%s'" % str(term).replace("'", "''")
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# This branch of the if statement will only be used by Python 2 to catch
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# unicode strings, text_type is used to prevent type errors with Python 3.
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elif isinstance(term, six.text_type):
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return "'%s'" % term.encode('utf8').replace("'", "''")
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else:
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return str(term)
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def cql_encode_none(val):
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return 'NULL'
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def cql_encode_unicode(val):
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return cql_quote(val.encode('utf-8'))
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def cql_encode_str(val):
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return cql_quote(val)
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if six.PY3:
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def cql_encode_bytes(val):
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return (b'0x' + hexlify(val)).decode('utf-8')
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elif sys.version_info >= (2, 7):
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def cql_encode_bytes(val): # noqa
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return b'0x' + hexlify(val)
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else:
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# python 2.6 requires string or read-only buffer for hexlify
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def cql_encode_bytes(val): # noqa
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return b'0x' + hexlify(buffer(val))
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def cql_encode_object(val):
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return str(val)
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def cql_encode_datetime(val):
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timestamp = calendar.timegm(val.utctimetuple())
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return str(long(timestamp * 1e3 + getattr(val, 'microsecond', 0) / 1e3))
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def cql_encode_date(val):
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return "'%s'" % val.strftime('%Y-%m-%d-0000')
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def cql_encode_sequence(val):
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return '( %s )' % ' , '.join(cql_encoders.get(type(v), cql_encode_object)(v)
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for v in val)
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cql_encode_tuple = cql_encode_sequence
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def cql_encode_map_collection(val):
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return '{ %s }' % ' , '.join('%s : %s' % (
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cql_encode_all_types(k),
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cql_encode_all_types(v)
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) for k, v in six.iteritems(val))
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def cql_encode_list_collection(val):
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return '[ %s ]' % ' , '.join(map(cql_encode_all_types, val))
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def cql_encode_set_collection(val):
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return '{ %s }' % ' , '.join(map(cql_encode_all_types, val))
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def cql_encode_all_types(val):
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return cql_encoders.get(type(val), cql_encode_object)(val)
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cql_encoders = {
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float: cql_encode_object,
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bytearray: cql_encode_bytes,
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str: cql_encode_str,
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int: cql_encode_object,
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UUID: cql_encode_object,
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datetime.datetime: cql_encode_datetime,
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datetime.date: cql_encode_date,
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dict: cql_encode_map_collection,
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OrderedDict: cql_encode_map_collection,
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list: cql_encode_list_collection,
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tuple: cql_encode_list_collection,
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set: cql_encode_set_collection,
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frozenset: cql_encode_set_collection,
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types.GeneratorType: cql_encode_list_collection
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}
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if six.PY2:
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cql_encoders.update({
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unicode: cql_encode_unicode,
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buffer: cql_encode_bytes,
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long: cql_encode_object,
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types.NoneType: cql_encode_none,
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})
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else:
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cql_encoders.update({
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memoryview: cql_encode_bytes,
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bytes: cql_encode_bytes,
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type(None): cql_encode_none,
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})
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# sortedset is optional
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try:
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from blist import sortedset
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cql_encoders.update({
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sortedset: cql_encode_set_collection
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})
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except ImportError:
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pass
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