Add Selector provider

This commit is contained in:
Roman Mogylatov 2020-06-29 13:11:53 -04:00
parent 783be3ad36
commit a4b38f9c83
4 changed files with 2689 additions and 527 deletions

View File

@ -846,6 +846,7 @@ struct __pyx_obj_19dependency_injector_9providers_AbstractSingleton;
struct __pyx_obj_19dependency_injector_9providers_SingletonDelegate;
struct __pyx_obj_19dependency_injector_9providers_List;
struct __pyx_obj_19dependency_injector_9providers_Container;
struct __pyx_obj_19dependency_injector_9providers_Selector;
struct __pyx_obj_19dependency_injector_9providers_Injection;
struct __pyx_obj_19dependency_injector_9providers_PositionalInjection;
struct __pyx_obj_19dependency_injector_9providers_NamedInjection;
@ -857,7 +858,7 @@ struct __pyx_obj_19dependency_injector_10containers___pyx_scope_struct_4_overrid
struct __pyx_obj_19dependency_injector_10containers___pyx_scope_struct_5_copy;
struct __pyx_opt_args_19dependency_injector_9providers_deepcopy;
/* "providers.pxd":225
/* "providers.pxd":232
*
*
* cpdef object deepcopy(object instance, dict memo=*) # <<<<<<<<<<<<<<
@ -1284,7 +1285,21 @@ struct __pyx_obj_19dependency_injector_9providers_Container {
};
/* "providers.pxd":188
/* "providers.pxd":187
*
*
* cdef class Selector(Provider): # <<<<<<<<<<<<<<
* cdef object selector
* cdef dict providers
*/
struct __pyx_obj_19dependency_injector_9providers_Selector {
struct __pyx_obj_19dependency_injector_9providers_Provider __pyx_base;
PyObject *selector;
PyObject *providers;
};
/* "providers.pxd":195
*
* # Injections
* cdef class Injection(object): # <<<<<<<<<<<<<<
@ -1300,7 +1315,7 @@ struct __pyx_obj_19dependency_injector_9providers_Injection {
};
/* "providers.pxd":195
/* "providers.pxd":202
*
*
* cdef class PositionalInjection(Injection): # <<<<<<<<<<<<<<
@ -1312,7 +1327,7 @@ struct __pyx_obj_19dependency_injector_9providers_PositionalInjection {
};
/* "providers.pxd":199
/* "providers.pxd":206
*
*
* cdef class NamedInjection(Injection): # <<<<<<<<<<<<<<
@ -1859,6 +1874,20 @@ struct __pyx_vtabstruct_19dependency_injector_9providers_Container {
};
static struct __pyx_vtabstruct_19dependency_injector_9providers_Container *__pyx_vtabptr_19dependency_injector_9providers_Container;
/* "providers.pxd":187
*
*
* cdef class Selector(Provider): # <<<<<<<<<<<<<<
* cdef object selector
* cdef dict providers
*/
struct __pyx_vtabstruct_19dependency_injector_9providers_Selector {
struct __pyx_vtabstruct_19dependency_injector_9providers_Provider __pyx_base;
};
static struct __pyx_vtabstruct_19dependency_injector_9providers_Selector *__pyx_vtabptr_19dependency_injector_9providers_Selector;
/* --- Runtime support code (head) --- */
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@ -2507,6 +2536,7 @@ static PyTypeObject *__pyx_ptype_19dependency_injector_9providers_AbstractSingle
static PyTypeObject *__pyx_ptype_19dependency_injector_9providers_SingletonDelegate = 0;
static PyTypeObject *__pyx_ptype_19dependency_injector_9providers_List = 0;
static PyTypeObject *__pyx_ptype_19dependency_injector_9providers_Container = 0;
static PyTypeObject *__pyx_ptype_19dependency_injector_9providers_Selector = 0;
static PyTypeObject *__pyx_ptype_19dependency_injector_9providers_Injection = 0;
static PyTypeObject *__pyx_ptype_19dependency_injector_9providers_PositionalInjection = 0;
static PyTypeObject *__pyx_ptype_19dependency_injector_9providers_NamedInjection = 0;
@ -9302,7 +9332,7 @@ static PyObject *__pyx_pf_19dependency_injector_10containers_6_check_provider_ty
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}
/* "providers.pxd":229
/* "providers.pxd":236
*
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@ -9327,7 +9357,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___get_na
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/* "providers.pxd":229
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*
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*
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@ -10082,7 +10112,7 @@ static CYTHON_INLINE PyObject *__pyx_f_19dependency_injector_9providers___factor
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/* "providers.pxd":311
/* "providers.pxd":318
*
*
* cdef inline object __factory_call(Factory self, tuple args, dict kwargs): # <<<<<<<<<<<<<<

File diff suppressed because it is too large Load Diff

View File

@ -184,6 +184,13 @@ cdef class Container(Provider):
cpdef object _provide(self, tuple args, dict kwargs)
cdef class Selector(Provider):
cdef object selector
cdef dict providers
cpdef object _provide(self, tuple args, dict kwargs)
# Injections
cdef class Injection(object):
cdef object __value

View File

@ -2267,6 +2267,82 @@ cdef class Container(Provider):
return self.container
cdef class Selector(Provider):
"""Selector provider selects provider based on the configuration value or other callable.
:py:class:`Selector` provider has a callable called ``selector`` and a dictionary of providers.
The ``selector`` callable is provided as a first positional argument. It can be
:py:class:`Configuration` provider or any other callable. It has to return a string value.
That value is used as a key for selecting the provider from the dictionary of providers.
The providers are provided as keyword arguments. Argument name is used as a key for
selecting the provider.
.. code-block:: python
config = Configuration()
selector = Selector(
config.one_or_another,
one=providers.Factory(SomeClass),
another=providers.Factory(SomeOtherClass),
)
config.override({'one_or_another': 'one'})
some_instance = selector()
assert isinstance(some_instance, SomeClass)
config.override({'one_or_another': 'another'})
some_instance = selector()
assert isinstance(some_instance, SomeOtherClass)
"""
def __init__(self, selector, **providers):
"""Initialize provider."""
self.selector = selector
self.providers = providers
super(Selector, self).__init__()
def __deepcopy__(self, memo):
"""Create and return full copy of provider."""
copied = memo.get(id(self))
if copied is not None:
return copied
copied = self.__class__(
deepcopy(self.selector, memo)
**deepcopy(self.providers, memo),
)
self._copy_overridings(copied, memo)
return copied
def __getattr__(self, name):
"""Return provider."""
if name.startswith('__') and name.endswith('__'):
raise AttributeError(
'\'{cls}\' object has no attribute '
'\'{attribute_name}\''.format(cls=self.__class__.__name__,
attribute_name=name))
if name not in self.providers:
raise AttributeError('Selector has no "{0}" provider'.format(name))
return getattr(self.container, name)
cpdef object _provide(self, tuple args, dict kwargs):
"""Return single instance."""
selector_value = self.selector()
if selector_value is None:
raise Error('Selector value is undefined')
if selector_value not in self.providers:
raise Error('Selector has no "{0}" provider'.format(selector_value))
return self.providers[selector_value](*args, **kwargs)
cdef class Injection(object):
"""Abstract injection class."""