|
1
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""" |
|
2
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|
Code in this module is used to wrap and decorate functions that have been |
|
3
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|
bound to a container |
|
4
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|
""" |
|
5
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|
6
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1 |
|
import functools |
|
7
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1 |
|
import inspect |
|
8
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|
|
9
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1 |
|
from .exceptions import UnableToInvokeBoundFunction |
|
10
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1 |
|
from .util.reflection import FunctionSpec |
|
11
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|
|
12
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|
|
13
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1 |
|
def apply_argument_updater( |
|
14
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func, argument_updater, spec: FunctionSpec, catch_errors=False |
|
15
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|
|
): |
|
16
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1 |
|
inner_func = func if not catch_errors else _wrap_func_in_error_handling(func, spec) |
|
17
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1 |
|
if inspect.iscoroutinefunction(func): |
|
18
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|
|
|
|
19
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1 |
|
@functools.wraps(func) |
|
20
|
1 |
|
async def _bound_func(*args, **kwargs): |
|
21
|
1 |
|
bound_args, bound_kwargs = argument_updater(args, kwargs) |
|
22
|
1 |
|
return await inner_func(*bound_args, **bound_kwargs) |
|
23
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|
|
|
|
24
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|
else: |
|
25
|
|
|
|
|
26
|
1 |
|
@functools.wraps(func) |
|
27
|
1 |
|
def _bound_func(*args, **kwargs): |
|
28
|
1 |
|
bound_args, bound_kwargs = argument_updater(args, kwargs) |
|
29
|
1 |
|
return inner_func(*bound_args, **bound_kwargs) |
|
30
|
|
|
|
|
31
|
1 |
|
return _bound_func |
|
32
|
|
|
|
|
33
|
|
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|
|
34
|
1 |
|
def _wrap_func_in_error_handling(func, spec: FunctionSpec): |
|
35
|
|
|
""" |
|
36
|
|
|
Takes a func and its spec and returns a function that's the same |
|
37
|
|
|
but with more useful TypeError messages |
|
38
|
|
|
:param func: |
|
39
|
|
|
:param spec: |
|
40
|
|
|
:return: |
|
41
|
|
|
""" |
|
42
|
|
|
|
|
43
|
1 |
|
@functools.wraps(func) |
|
44
|
1 |
|
def _error_handling_func(*args, **kwargs): |
|
45
|
1 |
|
try: |
|
46
|
1 |
|
return func(*args, **kwargs) |
|
47
|
1 |
|
except TypeError as error: |
|
48
|
|
|
# if it wasn't in kwargs the container couldn't build it |
|
49
|
1 |
|
unresolvable_deps = [ |
|
50
|
|
|
dep_type |
|
51
|
|
|
for (name, dep_type) in spec.annotations.items() |
|
52
|
|
|
if name not in kwargs.keys() |
|
53
|
|
|
] |
|
54
|
1 |
|
raise UnableToInvokeBoundFunction(str(error), unresolvable_deps) |
|
55
|
|
|
|
|
56
|
|
|
return _error_handling_func |
|
57
|
|
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|
meadsteve /
lagom
