|
1
|
|
|
import inspect |
|
2
|
|
|
import attr |
|
3
|
|
|
from green_magic.utils import Command |
|
4
|
|
|
from green_magic.utils import Subject, Observer |
|
5
|
|
|
from green_magic.data.dataset import DatapointsFactory |
|
6
|
|
|
|
|
7
|
|
|
|
|
8
|
|
|
class MyDecorator(type): |
|
9
|
|
|
"""Metaclass that provides a decorator able to be invoked both with and without parenthesis. |
|
10
|
|
|
The wrapper function logic should be implemented by the client code. |
|
11
|
|
|
""" |
|
12
|
|
|
@classmethod |
|
13
|
|
|
def magic_decorator(mcs, arg=None): |
|
14
|
|
|
print("DEBUG magic_decorator 1, args:", str(arg)) |
|
15
|
|
|
def decorator(func): |
|
16
|
|
|
print("DEBUG magic_decorator 2, args:", str(func)) |
|
17
|
|
|
def wrapper(*a, **ka): |
|
18
|
|
|
print("DEBUG magic_decorator 3, args: [{}]".format(', '.join(str(x) for x in a))) |
|
19
|
|
|
ffunc = a[0] |
|
20
|
|
|
mcs._wrapper(ffunc, *a[1:], **ka) |
|
21
|
|
|
return ffunc |
|
22
|
|
|
print("DEBUG magic_decorator 4, func: {}".format(str(func))) |
|
23
|
|
|
return wrapper |
|
24
|
|
|
|
|
25
|
|
|
if callable(arg): |
|
26
|
|
|
print("Decoration invokation WITHOUT parenthesis") |
|
27
|
|
|
_ = decorator(arg) |
|
28
|
|
|
print("OUT: {}".format(str(_))) |
|
29
|
|
|
print(type(_)) |
|
30
|
|
|
return _ # return 'wrapper' |
|
31
|
|
|
else: |
|
32
|
|
|
print("Decoration invokation WITH parenthesis") |
|
33
|
|
|
_ = decorator |
|
34
|
|
|
print(f"OUT: {str(_)}") |
|
35
|
|
|
print(type(_)) |
|
36
|
|
|
return _ # ... or 'decorator' |
|
37
|
|
|
|
|
38
|
|
|
# @classmethod |
|
39
|
|
|
# def _wrapper(cls, a_callable, *args, **kwargs): |
|
40
|
|
|
# print("GGGGGGGG EngineType _wrapper", str(a_callable)) |
|
41
|
|
|
# if hasattr(a_callable, '__code__'): # it is a function (def func_name ..) |
|
42
|
|
|
# cls.registry[kwargs.get('name', kwargs.get('key', a_callable.__code__.co_name))] = cls.command_factory( |
|
43
|
|
|
# function) |
|
44
|
|
|
# else: |
|
45
|
|
|
# if not hasattr(a_callable, '__call__'): |
|
46
|
|
|
# raise RuntimeError( |
|
47
|
|
|
# f"Expected an class definition with a '__call__' instance method defined 1. Got {type(a_callable)}") |
|
48
|
|
|
# members = inspect.getmembers(a_callable) |
|
49
|
|
|
# if not ('__call__', a_callable.__call__) in members: |
|
50
|
|
|
# raise RuntimeError( |
|
51
|
|
|
# f"Expected an class definition with a '__call__' instance method defined 2. Got {type(a_callable)}") |
|
52
|
|
|
# instance = a_callable() |
|
53
|
|
|
# cls.registry[kwargs.get('name', kwargs.get('key', getattr(instance, 'name', type( |
|
54
|
|
|
# a_callable).__name__)))] = cls.command_factory(instance) |
|
55
|
|
|
|
|
56
|
|
|
class CommandRegistrator(MyDecorator): |
|
57
|
|
|
"""Classes can use this class as metaclass to obtain a single registration point accessible as class attribute |
|
58
|
|
|
""" |
|
59
|
|
|
def __new__(mcs, *args, **kwargs): |
|
60
|
|
|
class_object = super().__new__(mcs, *args, **kwargs) |
|
61
|
|
|
class_object.state = None |
|
62
|
|
|
class_object.registry = {} |
|
63
|
|
|
return class_object |
|
64
|
|
|
|
|
65
|
|
|
def __getitem__(self, item): |
|
66
|
|
|
if item not in self.registry: |
|
67
|
|
|
raise RuntimeError(f"Key '{item}' fot found in registry: [{', '.join(str(x) for x in self.registry.keys())}]") |
|
68
|
|
|
return self.registry[item] |
|
69
|
|
|
|
|
70
|
|
|
def func_decorator(cls): |
|
71
|
|
|
def wrapper(a_callable): |
|
72
|
|
|
if hasattr(a_callable, '__code__'): # it a function (def func_name ..) |
|
73
|
|
|
print(f"Registering input function {a_callable.__code__.co_name}") |
|
74
|
|
|
cls.registry[a_callable.__code__.co_name] = a_callable |
|
75
|
|
|
else: |
|
76
|
|
|
raise RuntimeError(f"Expected a function to be decorated; got {type(a_callable)}") |
|
77
|
|
|
return a_callable |
|
78
|
|
|
return wrapper |
|
79
|
|
|
|
|
80
|
|
|
|
|
81
|
|
|
class CommandFactory: |
|
82
|
|
|
"""A factory class able to construct new command objects.""" |
|
83
|
|
|
command_constructor = Command |
|
84
|
|
|
datapoints_factory = DatapointsFactory() |
|
85
|
|
|
@classmethod |
|
86
|
|
|
def create(cls, *args) -> Command: |
|
87
|
|
|
"""Call to create a new Command object. The input arguments can be in two formats: |
|
88
|
|
|
|
|
89
|
|
|
1. create(an_object, method, *arguments) |
|
90
|
|
|
In this case the command is of the form an_object.method(*arguments) |
|
91
|
|
|
|
|
92
|
|
|
2. create(a_function, *arguments) |
|
93
|
|
|
In this case the command is of the form a_function(*arguments) |
|
94
|
|
|
|
|
95
|
|
|
Returns: |
|
96
|
|
|
Command: an instance of a command object |
|
97
|
|
|
""" |
|
98
|
|
|
is_function = hasattr(args[0], '__code__') |
|
99
|
|
|
if is_function: # if receiver is a function; creating from function |
|
100
|
|
|
return cls.command_constructor(args[0], '__call__', *args[1:]), args[0].__code__.co_name |
|
101
|
|
|
return cls.command_constructor(args[0], args[1], *args[2:]), type(args[0]) + '-' + args[1] |
|
102
|
|
|
|
|
103
|
|
|
|
|
104
|
|
|
@attr.s |
|
105
|
|
|
class MagicCommandFactory(Subject): |
|
106
|
|
|
"""Instances of this class act as callable command factories that notify, |
|
107
|
|
|
subscribed observers/listeners upon new command object creation. |
|
108
|
|
|
|
|
109
|
|
|
Args: |
|
110
|
|
|
command_factory (CommandFactory, optional): an instance of a CommandFActory |
|
111
|
|
|
""" |
|
112
|
|
|
command_factory = attr.ib(init=True, default=CommandFactory()) |
|
113
|
|
|
|
|
114
|
|
|
def __call__(self, *args, **kwargs): |
|
115
|
|
|
self._state, self.name = self.command_factory.create(*args) |
|
116
|
|
|
self.notify() |
|
117
|
|
|
return self._state |
|
118
|
|
|
|
|
119
|
|
|
|
|
120
|
|
|
@attr.s |
|
121
|
|
|
class CommandsAccumulator(Observer): |
|
122
|
|
|
"""""" |
|
123
|
|
|
commands = attr.ib(init=False, default={}) |
|
124
|
|
|
|
|
125
|
|
|
def update(self, subject: Subject) -> None: |
|
126
|
|
|
self.commands[getattr(subject, 'name', str(subject.state))] = subject.state |
|
|
|
|
|
|
127
|
|
|
|
|
128
|
|
|
@attr.s |
|
129
|
|
|
class CommandGetter: |
|
130
|
|
|
_commands_accumulator = attr.ib(init=True, default=CommandsAccumulator()) |
|
131
|
|
|
|
|
132
|
|
|
@property |
|
133
|
|
|
def accumulator(self): |
|
134
|
|
|
return self._commands_accumulator |
|
135
|
|
|
|
|
136
|
|
|
def __getattr__(self, item): |
|
137
|
|
|
if item not in self._commands_accumulator.commands: |
|
138
|
|
|
raise KeyError(f"Item '{item}' not found in [{', '.join(str(_) for _ in self._commands_accumulator.commands.keys())}]") |
|
139
|
|
|
return self._commands_accumulator.commands[item] |
|
140
|
|
|
|
|
141
|
|
|
|
|
142
|
|
|
@attr.s |
|
143
|
|
|
class CommandsManager: |
|
144
|
|
|
"""[summary] |
|
145
|
|
|
|
|
146
|
|
|
Args: |
|
147
|
|
|
prototypes (dict, optional): initial prototypes to be supplied |
|
148
|
|
|
command_factory (callable, optional): a callable that returns an instance of Command |
|
149
|
|
|
""" |
|
150
|
|
|
_commands_getter = attr.ib(init=True, default=CommandGetter()) |
|
151
|
|
|
|
|
152
|
|
|
@property |
|
153
|
|
|
def command(self): |
|
154
|
|
|
return self._commands_getter |
|
155
|
|
|
|
|
156
|
|
|
@property |
|
157
|
|
|
def commands_dict(self): |
|
158
|
|
|
return self._commands_accumulator.commands |
|
159
|
|
|
|
|
160
|
|
|
def __getattr__(self, item): |
|
161
|
|
|
if item not in self._commands_accumulator.commands: |
|
162
|
|
|
raise KeyError(f"Item '{item}' not found in [{', '.join(str(_) for _ in self._commands_accumulator.commands.keys())}]") |
|
163
|
|
|
return self._commands_accumulator.commands[item] |
|
164
|
|
|
|
boromir674 /
so-magic
Loading history...