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# KInterbasDB Python Package - Type Conv : DateTime/eGenix mx.DateTime
#
# Version 3.3
#
# The following contributors hold Copyright (C) over their respective
# portions of code (see license.txt for details):
#
# [Original Author (maintained through version 2.0-0.3.1):]
# 1998-2001 [alex] Alexander Kuznetsov <alexan@users.sourceforge.net>
# [Maintainers (after version 2.0-0.3.1):]
# 2001-2002 [maz] Marek Isalski <kinterbasdb@maz.nu>
# 2002-2006 [dsr] David Rushby <woodsplitter@rocketmail.com>
# [Contributors:]
# 2001 [eac] Evgeny A. Cherkashin <eugeneai@icc.ru>
# 2001-2002 [janez] Janez Jere <janez.jere@void.si>
__all__ = (
# kinterbasdb-native date and time converters:
'date_conv_in', 'date_conv_out',
'time_conv_in', 'time_conv_out',
'timestamp_conv_in', 'timestamp_conv_out',
# DB API 2.0 standard date and time type constructors:
'Date', 'Time', 'Timestamp',
'DateFromTicks', 'TimeFromTicks', 'TimestampFromTicks',
)
import sys
from kinterbasdb.k_exceptions import *
# This conversion module uses mx.DateTime for its date/time operations.
try:
from mx import DateTime as mxDT
except ImportError:
raise ImportError('kinterbasdb uses the mx.DateTime module (from the'
' "eGenix mx Base Package") by default for date/time/timestamp'
' representation, but you do not have this package installed.'
'\nYou can either download the eGenix mx Base Package from'
'\nhttp://www.egenix.com/files/python/eGenix-mx-Extensions.html#Download-mxBASE'
'\nor tell kinterbasdb to use the Python standard library datetime'
' module instead, as explained at'
'\nhttp://kinterbasdb.sourceforge.net/dist_docs/usage.html#faq_fep_is_mxdatetime_required'
)
################################################################################
## DATE AND TIME
################################################################################
# kinterbasdb-native date and time converters:
def date_conv_in(mxDateTimeObj):
# Allow implicit param conv:
if mxDateTimeObj is None or isinstance(mxDateTimeObj, basestring):
return mxDateTimeObj
if not isinstance(mxDateTimeObj, mxDT.DateTimeType):
raise InterfaceError(
'Required type: %s ; supplied type: %s'
% ( str(mxDT.DateTimeType), str(type(mxDateTimeObj)) )
)
return mxDateTimeObj.tuple()[:3]
def date_conv_out(dateTuple):
if dateTuple is None:
return None
return mxDT.DateTime(*dateTuple)
def time_conv_in(mxDateTimeOrTimeDeltaObj):
# Allow implicit param conv:
if ( mxDateTimeOrTimeDeltaObj is None
or isinstance(mxDateTimeOrTimeDeltaObj, basestring)
):
return mxDateTimeOrTimeDeltaObj
if isinstance(mxDateTimeOrTimeDeltaObj, mxDT.DateTimeType):
timeTuple = mxDateTimeOrTimeDeltaObj.tuple()[3:6]
elif isinstance(mxDateTimeOrTimeDeltaObj, mxDT.DateTimeDeltaType):
timeTuple = mxDateTimeOrTimeDeltaObj.tuple()[1:]
else:
raise InterfaceError(
'Cannot convert object of type %s to native kinterbasdb tuple.'
% str(type(mxDateTimeOrTimeDeltaObj))
)
secondsFrac = timeTuple[2]
seconds = int(secondsFrac)
microseconds = int((secondsFrac - seconds) * 1000000)
return (timeTuple[0], timeTuple[1], seconds, microseconds)
def time_conv_out(timeTuple):
if timeTuple is None:
return None
if len(timeTuple) != 4:
return mxDT.Time(*timeTuple)
else:
(hour, minute, second, micros) = timeTuple
secondsFrac = second + micros / 1000000.0
return mxDT.Time(hour, minute, secondsFrac)
def timestamp_conv_in(mxDateTimeObj):
# Allow implicit param conv:
if mxDateTimeObj is None or isinstance(mxDateTimeObj, basestring):
return mxDateTimeObj
if not isinstance(mxDateTimeObj, mxDT.DateTimeType):
raise InterfaceError(
'Required type: %s ; supplied type: %s'
% ( str(mxDT.DateTimeType), str(type(mxDateTimeObj)) )
)
timestampTuple = mxDateTimeObj.tuple()
secondsFrac = timestampTuple[5]
seconds = int(secondsFrac)
microseconds = int((secondsFrac - seconds) * 1000000)
return timestampTuple[:5] + (seconds, microseconds)
def timestamp_conv_out(timestampTuple):
if timestampTuple is None:
return None
if len(timestampTuple) == 7:
(year, month, day, hour, minute, second, micros) = timestampTuple
secondsFrac = second + micros / 1000000.0
else:
(year, month, day, hour, minute, second) = timestampTuple
secondsFrac = second
return mxDT.DateTime(year, month, day, hour, minute, secondsFrac)
# DB API 2.0 standard date and time type constructors:
def Date(year, month, day):
try:
theDate = mxDT.DateTime(year, month, day)
except mxDT.Error, e:
raise DataError(str(e))
return theDate
def Time(hour, minute, second):
# mx DateTimeDeltas roll over when provided with an hour greater than
# 23, a minute greater than 59, and so on. That is not acceptable for our
# purposes.
if hour < 0 or hour > 23:
raise DataError("hour must be between 0 and 23")
if minute < 0 or minute > 59:
raise DataError("minute must be between 0 and 59")
if second < 0 or second > 59:
raise DataError("second must be between 0 and 59")
try:
theTime = mxDT.TimeDelta(hour, minute, second)
except mxDT.Error, e:
raise DataError(str(e))
return theTime
def Timestamp(year, month, day, hour, minute, second):
args = (year, month, day, hour, minute, second) # Yes, I know about the
# *args syntactical shortcut, but it's not particularly readable.
# mx mxDT's Timestamp constructor accepts negative values in the
# spirit of Python's negative list indexes, but I see no reason to allow
# that behavior in this DB API-compliance-obsessed module.
if 0 < len(filter(lambda x: x < 0, args)):
raise DataError("Values less than zero not allowed in Timestamp."
" (Received arguments %s)"
% repr(args)
)
try:
theStamp = mxDT.DateTime(*args)
except mxDT.Error, e:
raise DataError(str(e))
return theStamp
DateFromTicks = mxDT.DateFromTicks
TimeFromTicks = mxDT.TimeFromTicks
TimestampFromTicks = mxDT.TimestampFromTicks
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