def serialize(cls, v, protocol_version):
buf = io.BytesIO()
bound_kind, bounds = None, ()
try:
value = v.value
except AttributeError:
raise ValueError(
'%s.serialize expects an object with a value attribute; got'
'%r' % (cls.__name__, v)
)
if value is None:
try:
lower_bound, upper_bound = v.lower_bound, v.upper_bound
except AttributeError:
raise ValueError(
'%s.serialize expects an object with lower_bound and '
'upper_bound attributes; got %r' % (cls.__name__, v)
)
if lower_bound == util.OPEN_BOUND and upper_bound == util.OPEN_BOUND:
bound_kind = BoundKind.BOTH_OPEN_RANGE
elif lower_bound == util.OPEN_BOUND:
bound_kind = BoundKind.OPEN_RANGE_LOW
bounds = (upper_bound,)
elif upper_bound == util.OPEN_BOUND:
bound_kind = BoundKind.OPEN_RANGE_HIGH
bounds = (lower_bound,)
else:
bound_kind = BoundKind.CLOSED_RANGE
bounds = lower_bound, upper_bound
else: # value is not None
if value == util.OPEN_BOUND:
bound_kind = BoundKind.SINGLE_DATE_OPEN
else:
bound_kind = BoundKind.SINGLE_DATE
bounds = (value,)
if bound_kind is None:
raise ValueError(
'Cannot serialize %r; could not find bound kind' % (v,)
)
buf.write(int8_pack(BoundKind.to_int(bound_kind)))
for bound in bounds:
buf.write(int64_pack(bound.milliseconds))
buf.write(int8_pack(cls._encode_precision(bound.precision)))
return buf.getvalue()
def serialize(v, protocol_version):
try:
# v is datetime
timestamp_seconds = calendar.timegm(v.utctimetuple())
timestamp = timestamp_seconds * 1e3 + getattr(v, 'microsecond', 0) / 1e3
except AttributeError:
try:
timestamp = calendar.timegm(v.timetuple()) * 1e3
except AttributeError:
# Ints and floats are valid timestamps too
if type(v) not in _number_types:
raise TypeError('DateType arguments must be a datetime, date, or timestamp')
timestamp = v
return int64_pack(long(timestamp))
def serialize(val, protocol_version):
try:
nano = val.nanosecond_time
except AttributeError:
nano = util.Time(val).nanosecond_time
return int64_pack(nano)
def serialize(byts, protocol_version):
return int64_pack(byts)
