# EMACS settings: -*- tab-width: 2; indent-tabs-mode: t; python-indent-offset: 2 -*-
# vim: tabstop=2:shiftwidth=2:noexpandtab
# kate: tab-width 2; replace-tabs off; indent-width 2;
#
# ==============================================================================
# Authors: Patrick Lehmann
# Thomas B. Preusser
#
# Python functions: Auxillary functions to exit a program and report an error message.
#
# License:
# ==============================================================================
# Copyright 2007-2016 Technische Universitaet Dresden - Germany
# Chair of VLSI-Design, Diagnostics and Architecture
#
# 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.
# ==============================================================================
#
# load dependencies
import functools
from lib.SphinxExtensions import DocumentMemberAttribute
__api__ = [
'MethodAlias',
'ILazyLoadable',
'LazyLoadTrigger',
'CachedReadOnlyProperty'
]
__all__ = __api__
[docs]class MethodAlias:
"""``MethodAlias`` creates a local method, which is an alias to another method
local or inherited method.
"""
@DocumentMemberAttribute()
[docs] def __init__(self, method):
self.method = method
@DocumentMemberAttribute()
[docs] def __call__(self, func):
return self.method
[docs]class ILazyLoadable:
def __init__(self):
self.__IsLoaded = False
[docs] def _LazyLoadable_Load(self):
self.__IsLoaded = True
@property
def LazyLoadable_IsLoaded(self):
return self.__IsLoaded
[docs]class LazyLoadTrigger:
def __init__(self, func):
self.func = func
def __call__(self, inst, *args, **kwargs):
if (inst.LazyLoadable_IsLoaded is False):
inst._LazyLoadable_Load()
return self.func(inst, *args, **kwargs)
def __repr__(self):
return self.func.__doc__
[docs]class CachedReadOnlyProperty:
def __init__(self, func):
self.func = func
self.__cache = None
def __call__(self, *args):
if self.__cache is None:
result = self.func(*args)
self.__cache = result
return self.__cache
def __repr__(self):
return self.func.__doc__
def __get__(self, obj, _):
functools.partial(self.__call__, obj)
# def property(function):
# import sys
# import builtins
#
# keys = 'fget', 'fset', 'fdel'
# func_locals = {'doc' : function.__doc__}
# def probe_func(frame, event, arg):
# if event == 'return':
# locals = frame.f_locals
# func_locals.update(dict((k, locals.get(k)) for k in keys))
# sys.settrace(None)
# return probe_func
# sys.settrace(probe_func)
# function()
# return builtins.property(**func_locals)