Container Infrastructure Management Service for OpenStack
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 

134 lines
3.6 KiB

# Copyright 2013 IBM Corp.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Utility methods for objects"""
import ast
import datetime
import iso8601
import netaddr
from oslo_utils import timeutils
import six
from magnum.i18n import _
def datetime_or_none(dt):
"""Validate a datetime or None value."""
if dt is None:
return None
elif isinstance(dt, datetime.datetime):
if dt.utcoffset() is None:
# NOTE(danms): Legacy objects from sqlalchemy are stored in UTC,
# but are returned without a timezone attached.
# As a transitional aid, assume a tz-naive object is in UTC.
return dt.replace(tzinfo=iso8601.iso8601.Utc())
else:
return dt
raise ValueError(_("A datetime.datetime is required here"))
def datetime_or_str_or_none(val):
if isinstance(val, six.string_types):
return timeutils.parse_isotime(val)
return datetime_or_none(val)
def int_or_none(val):
"""Attempt to parse an integer value, or None."""
if val is None:
return val
else:
return int(val)
def str_or_none(val):
"""Attempt to stringify a value to unicode, or None."""
if val is None:
return val
else:
return six.text_type(val)
def dict_or_none(val):
"""Attempt to dictify a value, or None."""
if val is None:
return {}
elif isinstance(val, six.string_types):
return dict(ast.literal_eval(val))
else:
try:
return dict(val)
except ValueError:
return {}
def list_or_none(val):
"""Attempt to listify a value, or None."""
if val is None:
return []
elif isinstance(val, six.string_types):
return list(ast.literal_eval(val))
else:
try:
return list(val)
except ValueError:
return []
def ip_or_none(version):
"""Return a version-specific IP address validator."""
def validator(val, version=version):
if val is None:
return val
else:
return netaddr.IPAddress(val, version=version)
return validator
def nested_object_or_none(objclass):
def validator(val, objclass=objclass):
if val is None or isinstance(val, objclass):
return val
raise ValueError(_("An object of class %s is required here")
% objclass)
return validator
def dt_serializer(name):
"""Return a datetime serializer for a named attribute."""
def serializer(self, name=name):
if getattr(self, name) is not None:
return timeutils.isotime(getattr(self, name))
else:
return None
return serializer
def dt_deserializer(instance, val):
"""A deserializer method for datetime attributes."""
if val is None:
return None
else:
return timeutils.parse_isotime(val)
def obj_serializer(name):
def serializer(self, name=name):
if getattr(self, name) is not None:
return getattr(self, name).obj_to_primitive()
else:
return None
return serializer