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# Copyright (c) 2010 Mark Sandstrom
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
class ObjectParamsWrapper(object):
'''A generic container that allows for getting but not setting of attributes.
Attributes are set at initialization time.'''
initialized = False
def __init__(self, dict):
self.dict = dict
self.initialized = True
def __setattr__(self, name, value):
if not self.initialized:
return super(ObjectParamsWrapper, self).__setattr__(name, value)
else:
raise AttributeError('Setting of object attributes is not allowed')
def __getattr__(self, name):
try:
return self.dict[name]
except KeyError:
raise AttributeError("The param '{0}' does not exist. Perhaps your declarations are out of order?".format(name))
class OrderedDeclarationDict(object):
def __init__(self, **kwargs):
self._order = {}
self._values = {}
for k, v in kwargs.iteritems():
self[k] = v
def __contains__(self, key):
return key in self._values
def __getitem__(self, key):
return self._values[key]
def __setitem__(self, key, val):
if key in self:
del self[key]
self._values[key] = val
self._order[val.order] = key
def __delitem__(self, key):
self.pop(key)
def pop(self, key):
val = self._values.pop(key)
del self._order[val.order]
return val
def items(self):
return list(self.iteritems())
def iteritems(self):
order = sorted(self._order.keys())
for i in order:
key = self._order[i]
yield (key, self._values[key])
def __iter__(self):
order = sorted(self._order.keys())
for i in order:
yield self._order[i]
class StubObject(object):
'''A generic container.'''
pass
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