120 lines
3.2 KiB
Python
120 lines
3.2 KiB
Python
# (c) Copyright 2014-2016 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import json
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import logging
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logging = logging.getLogger(__name__)
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class Namespace(dict):
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"""A dict subclass that exposes its items as attributes.
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Warning: Namespace instances do not have direct access to the
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dict methods.
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"""
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def __init__(self, obj={}):
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super(Namespace, self).__init__(obj)
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def __dir__(self):
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return tuple(self)
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def __repr__(self):
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return "%s(%s)" % (type(self).__name__,
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super(Namespace, self).__repr__())
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def __getattribute__(self, name):
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try:
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return self[name]
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except KeyError:
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# Return None in case the value doesn't exists
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# this is not an issue for the apiclient because it skips
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# None values
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return None
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def __setattr__(self, name, value):
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self[name] = value
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def __delattr__(self, name):
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del self[name]
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@classmethod
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def from_object(cls, obj, names=None):
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if names is None:
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names = dir(obj)
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ns = {name:getattr(obj, name) for name in names}
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return cls(ns)
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@classmethod
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def from_mapping(cls, ns, names=None):
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if names:
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ns = {name: ns[name] for name in names}
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return cls(ns)
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@classmethod
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def from_sequence(cls, seq, names=None):
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if names:
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seq = {name: val for name, val in seq if name in names}
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return cls(seq)
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@staticmethod
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def hasattr(ns, name):
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try:
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object.__getattribute__(ns, name)
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except AttributeError:
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return False
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return True
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@staticmethod
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def getattr(ns, name):
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return object.__getattribute__(ns, name)
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@staticmethod
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def setattr(ns, name, value):
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return object.__setattr__(ns, name, value)
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@staticmethod
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def delattr(ns, name):
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return object.__delattr__(ns, name)
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class CachedProperty(object):
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def __init__(self, func):
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self.__doc__ = getattr(func, '__doc__')
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self.func = func
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def __get__(self, obj, cls):
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if obj is None:
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return self
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value = obj.__dict__[self.func.__name__] = self.func(obj)
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return value
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def doc_from_json_file(path_to_file):
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"""Build a json from a file in the file system
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:param path_to_file: path to file
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:return: in memory file in json format
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"""
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with open(path_to_file, 'rb') as fd:
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try:
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return json.load(fd)
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except Exception as err:
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logging.error(err)
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raise Exception('Unable to load conf file. {0}'.format(err))
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