otime.py

OpenWFE是一个开放源码的Java工作流引擎。它是一个完整的业务处理管理套件：一个引擎

#
# Copyright (c) 2005, John Mettraux, OpenWFE.org
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# $Id: otime.py 1931 2005-07-07 07:39:47Z jmettraux $
#

"""

    some time methods

"""

import time 
import string


TIME_FORMAT = '%Y-%m-%d %H:%M:%S'
#Z_TIME_FORMAT = '%Y-%m-%d %H:%M:%S%Z'


def currentTimeMillis ():
    """
        equivalent of the java method System.currentTimeMillis()
        returns the count of milliseconds since the epoch
    """
    return long(time.time() * 1000)


def _hts (h):
    """
        turns a string like '-0200' into -7200
    """
    sn = +1
    if h[0:1] == '-': sn = -1
    h = h[1:]
    m = h[2:]
    h = h[0:2]
    s = sn * (int(h)*3600 + int(m)*60)
    return s


def _sth (s):
    """
        seconds to hours (and minutes)
    """
    m = s / 60
    h = m / 60
    m = m % 60

    sign = +1
    if (s < 0):
        sign = -1
        h = -h
        m = -m

    return (sign, h, m)


def _getTz ():
    """
        returns the local timezone as a string like '-0200'
    """
    sn, h, m = _sth(time.altzone)
    if sn < 0:
        sn = '+'
    else:
        sn = '-'
    return '%s%s%s' % (sn, string.zfill(h, 2), string.zfill(m, 2))


def now ():
    """
        returns the current time expressed as an ISO date
    """
    s = time.strftime(TIME_FORMAT, time.localtime())
    return "%s%s" % (s, _getTz())


def toPyTime (isoDate):
    """
        turns an iso date into a python date tuple
    """
    zone = isoDate[-5:]
    isoDate = isoDate[:-5]
    tz = -int(zone)/100

    year, month, day, hour, minute, second, a, b, c = \
        time.strptime(isoDate, TIME_FORMAT)

    return (year, month, day, hour, minute, second, 1, 0, tz)