114 lines
2.7 KiB
Python
114 lines
2.7 KiB
Python
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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# unicode = str
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# long = int
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def cql_quote(term):
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if isinstance(term, unicode):
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return "'%s'" % term.encode('utf8').replace("'", "''")
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elif isinstance(term, (str, bool)):
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return "'%s'" % str(term).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 sys.version_info >= (2, 7):
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def cql_encode_bytes(val):
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return '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 '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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def cql_encode_map_collection(val):
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return '{ %s }' % ' , '.join(
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'%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 val.iteritems())
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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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six.binary_type: cql_encode_bytes,
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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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buffer: cql_encode_bytes,
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unicode: cql_encode_unicode,
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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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None: cql_encode_none,
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})
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