81 lines
2.4 KiB
Python
81 lines
2.4 KiB
Python
#
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# Copyright (c) 2014-2015 Sylvain Peyrefitte
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#
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# This file is part of rdpy.
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#
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# rdpy is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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"""
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Const it's use to create fake object enum in python
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"""
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from copy import deepcopy
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class Constant(object):
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"""
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@summary: Constant descriptor that deep copy value on get
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"""
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def __init__(self, value):
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"""
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@param value: value to protect
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"""
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self._value = value
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def __get__(self, obj, objType):
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"""
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@summary: on get constant return deep copy of wrapped value
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@param obj: unknown
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@param objType: unknown
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"""
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return deepcopy(self._value)
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def __set__(self, obj, value):
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"""
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@summary: Try to set a protect value is forbidden
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in python 2.7 this function work only
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on instanciate object
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@param obj:
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"""
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raise Exception("can't assign constant")
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def __delete__(self, obj):
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"""
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@summary: delete is forbidden on constant
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"""
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raise Exception("can't delete constant")
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def TypeAttributes(typeClass):
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"""
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@summary: Call typeClass ctor on each attributes
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to uniform atributes type on class
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@param typeClass: class use to construct each class attributes
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@return: class decorator
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"""
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def wrapper(cls):
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for c_name, c_value in cls.__dict__.iteritems():
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if c_name[0] != '_' and not callable(c_value):
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setattr(cls, c_name, typeClass(c_value))
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return cls
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return wrapper
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def ConstAttributes(cls):
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"""
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@summary: Copy on read attributes
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transform all attributes of class
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in constant attribute
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only attributes which are not begining with '_' char
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and are not callable
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"""
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return TypeAttributes(Constant)(cls) |