def count_offset_dates(self, origin_date, date, time_uom):
"""
Count the offset between two dates (ISO 8601 format) and return the time_delta in milliseconds
:param origin_date: string
:param date: string
:param time_uom: string
:return: float
"""
uom_milli_seconds = self.get_milli_by_uom(time_uom)
origin_date_milli_seconds = arrow.get(origin_date).timestamp * 1000
date_milli_seconds = arrow.get(date).timestamp * 1000
time_delta_in_uom = (float(date_milli_seconds) - float(origin_date_milli_seconds)) / float(uom_milli_seconds)
return time_delta_in_uom
def get_datetime_iso(datetime):
"""
Convert the datetime in decimal to ISO datetime format by arrow
:param datetime: decimal
:return: str
"""
return stringify(arrow.get(datetime))
def __init__(self, datetime, dt_format=None, time_crs=None):
"""
:param str datetime: the datetime value
:param str dt_format: the datetime format, if none is given we'll try to guess
"""
try:
if dt_format is None:
self.datetime = arrow.get(datetime)
else:
self.datetime = arrow.get(datetime, dt_format)
if time_crs is None:
self.time_crs_code = self.CRS_CODE_ANSI_DATE
else:
tmp_crs = CRSUtil(time_crs)
self.time_crs_code = tmp_crs.get_crs_code()
except ParserError as pe:
dt_format_err = "auto" if dt_format is None else dt_format
raise RuntimeException("Failed to parse the date " + datetime + " using format " + dt_format_err)
def __init__(self, datetime, dt_format=None, time_crs=None):
"""
:param str datetime: the datetime value
:param str dt_format: the datetime format, if none is given we'll try to guess
"""
self.init_cache()
try:
if dt_format is None:
self.datetime = arrow.get(datetime)
else:
self.datetime = arrow.get(datetime, dt_format)
if time_crs is None:
self.time_crs_code = self.CRS_CODE_ANSI_DATE
else:
tmp_crs = CRSUtil(time_crs)
self.time_crs_code = tmp_crs.get_crs_code()
except ParserError as pe:
dt_format_err = "auto" if dt_format is None else dt_format
raise RuntimeException("Failed to parse the date " + datetime +
" using format " + dt_format_err)
class DateTimeUtil:
MAX_DATE = arrow.get("9999-01-01 00:00:00")
MIN_DATE = arrow.get("0001-01-01 00:00:00")
CRS_CODE_ANSI_DATE = "AnsiDate"
CRS_CODE_UNIX_TIME = "UnixTime"
""" Standard codes
for supported temporal Unit of Measures (which provide ISO8601 interface to the user)
http://unitsofmeasure.org/ucum.html """
UCUM_MILLIS = "ms"
UCUM_SECOND = "s"
UCUM_MINUTE = "min"
UCUM_HOUR = "h"
UCUM_DAY = "d"
UCUM_WEEK = "wk"
UCUM_MEAN_JULIAN_MONTH = "mo_j"
UCUM_MEAN_GREGORIAN_MONTH = "mo_g"
UCUM_SYNODAL_MONTH = "mo_s"
UCUM_MONTH = "mo"
UCUM_MEAN_JULIAN_YEAR = "a_j"
UCUM_MEAN_GREGORIAN_YEAR = "a_g"
UCUM_TROPICAL_YEAR = "a_t"
UCUM_YEAR = "a"
""" Milliseconds associated to each supported temporal UoM """
MILLIS_MILLIS = 1
MILLIS_SECOND = 1000
MILLIS_MINUTE = MILLIS_SECOND * 60
MILLIS_HOUR = MILLIS_MINUTE * 60
MILLIS_DAY = MILLIS_HOUR * 24
MILLIS_WEEK = MILLIS_DAY * 7
MILLIS_MEAN_JULIAN_YEAR = (long)(MILLIS_DAY * 365.25)
MILLIS_MEAN_GREGORIAN_YEAR = (long)(MILLIS_DAY * 365.2425)
MILLIS_TROPICAL_YEAR = (long)(MILLIS_DAY * 365.24219)
MILLIS_YEAR = MILLIS_MEAN_JULIAN_YEAR
MILLIS_MEAN_JULIAN_MONTH = MILLIS_MEAN_JULIAN_YEAR / 12
MILLIS_MEAN_GREGORIAN_MONTH = MILLIS_MEAN_GREGORIAN_YEAR / 12
MILLIS_SYNODAL_MONTH = (long)(MILLIS_DAY * 29.53059)
MILLIS_MONTH = MILLIS_MEAN_JULIAN_MONTH
""" Time Axis Origin """
ANSI_DATE_ORIGIN = "1600-12-31T00:00:00Z"
UNIX_TIME_ORIGIN = "1970-01-01T00:00:00Z"
"""" AnsiDate To UnixTime """
DAY_IN_SECONDS = 24 * 3600
def __init__(self, datetime, dt_format=None, time_crs=None):
"""
:param str datetime: the datetime value
:param str dt_format: the datetime format, if none is given we'll try to guess
"""
self.init_cache()
from util.crs_util import CRSUtil
try:
if dt_format is None:
self.datetime = arrow.get(datetime)
else:
self.datetime = arrow.get(datetime, dt_format)
if time_crs is None:
self.time_crs_code = self.CRS_CODE_ANSI_DATE
else:
tmp_crs = CRSUtil(time_crs)
self.time_crs_code = tmp_crs.get_crs_code()
except ParserError as pe:
dt_format_err = "auto" if dt_format is None else dt_format
raise RuntimeException("Failed to parse the date " + datetime + " using format " + dt_format_err)
def to_string(self):
"""
Returns the datetime as a string
:return:
"""
if self.CRS_CODE_ANSI_DATE in self.time_crs_code:
return self.to_iso_format()
elif self.CRS_CODE_UNIX_TIME in self.time_crs_code:
return self.to_iso_format()
else:
return self.to_unknown()
def __str__(self):
return self.to_string()
def to_iso_format(self):
"""
Returns the datetime in iso format
:return: str
"""
return '"' + self.datetime.isoformat() + '"'
def to_unknown(self):
"""
Handle unknown time CRS
:return: throw RuntimeException
"""
raise RuntimeException("Unsupported time CRS " + self.time_crs_code)
def __eq__(self, other):
"""
Compares two tuples ==
:param DateTimeUtil other: the tuple to compare with
:rtype bool
"""
return self.datetime == other.datetime
def __lt__(self, other):
"""
Compares two tuples <
:param DateTimeUtil other: the tuple to compare with
:rtype bool
"""
return self.datetime < other.datetime
def init_cache(self):
"""
Initialize the map from uoms to values in seconds and time crss origins
:return:
"""
self.__UOM_TIME_MAP_CACHE__.update({self.UCUM_MILLIS: self.MILLIS_MILLIS,
self.UCUM_SECOND: self.MILLIS_SECOND,
self.UCUM_MINUTE: self.MILLIS_MINUTE,
self.UCUM_HOUR: self.MILLIS_HOUR,
self.UCUM_DAY: self.MILLIS_DAY,
self.UCUM_WEEK: self.MILLIS_WEEK,
self.UCUM_MEAN_JULIAN_MONTH: self.MILLIS_MEAN_JULIAN_MONTH,
self.UCUM_MEAN_GREGORIAN_MONTH: self.MILLIS_MEAN_GREGORIAN_MONTH,
self.UCUM_SYNODAL_MONTH: self.MILLIS_SYNODAL_MONTH,
self.UCUM_MONTH: self.MILLIS_MONTH,
self.UCUM_MEAN_JULIAN_YEAR: self.MILLIS_MEAN_JULIAN_YEAR,
self.UCUM_MEAN_GREGORIAN_YEAR: self.MILLIS_MEAN_GREGORIAN_YEAR,
self.UCUM_TROPICAL_YEAR: self.MILLIS_TROPICAL_YEAR,
self.UCUM_YEAR: self.MILLIS_YEAR
})
self.__TIME_CRS_MAP_CACHE__.update({self.CRS_CODE_ANSI_DATE: self.ANSI_DATE_ORIGIN,
self.CRS_CODE_UNIX_TIME: self.UNIX_TIME_ORIGIN})
def get_milli_by_uom(self, time_uom):
"""
Based on time_uom to return the correct milliseconds (e.g: 1d = 24 * 60 * 60 * 1000 milliseconds)
:param time_uom: uom of time crs (e.g: ansidate: d, unixtime: s)
:return: long
"""
# return the uom value in milliseconds
milli_seconds = self.__UOM_TIME_MAP_CACHE__.get(time_uom)
if milli_seconds is None:
raise RuntimeException("Time uom: " + time_uom + " does not support yet, cannot calculate time value in milliseconds from time uom.")
return milli_seconds
def get_time_crs_origin(self, crs_uri):
"""
Based on crs_uri (e.g: http://localhost:8080/def/crs/OGC/0/AnsiDate) to get the datetime origin
:param crs_uri: string
:return:
"""
date_origin = None
for key, value in self.__TIME_CRS_MAP_CACHE__.iteritems():
# e.g: AnsiDate in crs_uri
if key in crs_uri:
date_origin = value
break
if date_origin is None:
raise RuntimeException("Time crs: " + crs_uri + " does not support yet, cannot get the date origin from the time crs.")
return date_origin
def count_offset_dates(self, origin_date, date, time_uom):
"""
Count the offset between two dates (ISO 8601 format) and return the time_delta in milliseconds
:param origin_date: string
:param date: string
:param time_uom: string
:return: float
"""
uom_milli_seconds = self.get_milli_by_uom(time_uom)
origin_date_milli_seconds = arrow.get(origin_date).timestamp * 1000
date_milli_seconds = arrow.get(date).timestamp * 1000
time_delta_in_uom = (float(date_milli_seconds) - float(origin_date_milli_seconds)) / float(uom_milli_seconds)
return time_delta_in_uom
@staticmethod
def get_datetime_iso(datetime):
"""
Convert the datetime in decimal to ISO datetime format by arrow
:param datetime: decimal
:return: str
"""
return stringify(arrow.get(datetime))
@staticmethod
def get_now_datetime_stamp():
"""
Return the current date time for now with pattern as string.
"""
now = datetime.datetime.now()
result = now.strftime("%Y-%m-%d %H:%M:%S")
return result
__UOM_TIME_MAP_CACHE__ = {}
__TIME_CRS_MAP_CACHE__ = {}