class Time(Element):
"""
Time element.
"""
tagName = u"Time"
Name = attributeproxy(u"Name")
Type = attributeproxy(u"Type", default = u"ISO-8601")
def __init__(self, *args):
super(Time, self).__init__(*args)
if self.Type not in ligolwtypes.TimeTypes:
raise ElementError("invalid Type for Time: '%s'" % self.Type)
def endElement(self):
if self.Type == u"ISO-8601":
import dateutil.parser
self.pcdata = dateutil.parser.parse(self.pcdata)
elif self.Type == u"GPS":
from lal import LIGOTimeGPS
# FIXME: remove cast to string when lal swig
# can cast from unicode
self.pcdata = LIGOTimeGPS(str(self.pcdata))
elif self.Type == u"Unix":
self.pcdata = float(self.pcdata)
else:
# unsupported time type. not impossible that
# calling code has overridden TimeTypes set in
# glue.ligolw.types; just accept it as a string
pass
def write(self, fileobj = sys.stdout, indent = u""):
fileobj.write(self.start_tag(indent))
if self.pcdata is not None:
if self.Type == u"ISO-8601":
fileobj.write(xmlescape(unicode(self.pcdata.isoformat())))
elif self.Type == u"GPS":
fileobj.write(xmlescape(unicode(self.pcdata)))
elif self.Type == u"Unix":
fileobj.write(xmlescape(u"%.16g" % self.pcdata))
else:
# unsupported time type. not impossible.
# assume correct thing to do is cast to
# unicode and let calling code figure out
# how to ensure that does the correct
# thing.
fileobj.write(xmlescape(unicode(self.pcdata)))
fileobj.write(self.end_tag(u""))
fileobj.write(u"\n")
@classmethod
def now(cls, Name = None):
"""
Instantiate a Time element initialized to the current UTC
time in the default format (ISO-8601). The Name attribute
will be set to the value of the Name parameter if given.
"""
import datetime
self = cls()
if Name is not None:
self.Name = Name
self.pcdata = datetime.datetime.utcnow()
return self
@classmethod
def from_gps(cls, gps, Name = None):
"""
Instantiate a Time element initialized to the value of the
given GPS time. The Name attribute will be set to the
value of the Name parameter if given.
Note: the new Time element holds a reference to the GPS
time, not a copy of it. Subsequent modification of the GPS
time object will be reflected in what gets written to disk.
"""
self = cls(AttributesImpl({u"Type": u"GPS"}))
if Name is not None:
self.Name = Name
self.pcdata = gps
return self
