mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2024-11-22 01:26:51 +03:00
Make all protected attributes _protected
This commit is contained in:
Roman Mogilatov
parent
541d3c0e4b
commit
040aad93f8
|
|
@ -33,19 +33,19 @@ class AbstractCatalog(object):
|
|||
|
||||
providers = dict()
|
||||
|
||||
__slots__ = ('__used_providers__',)
|
||||
__slots__ = ('_used_providers',)
|
||||
|
||||
def __init__(self, *used_providers):
|
||||
"""Initializer."""
|
||||
self.__used_providers__ = set(used_providers)
|
||||
self._used_providers = set(used_providers)
|
||||
|
||||
def __getattribute__(self, item):
|
||||
"""Return providers."""
|
||||
attribute = super(AbstractCatalog, self).__getattribute__(item)
|
||||
if item in ('providers', '__used_providers__',):
|
||||
if item in ('providers', '_used_providers',):
|
||||
return attribute
|
||||
|
||||
if attribute not in self.__used_providers__:
|
||||
if attribute not in self._used_providers:
|
||||
raise Error('Provider \'{0}\' '.format(item) +
|
||||
'is not listed in dependencies')
|
||||
return attribute
|
||||
|
|
|
|||
|
|
@ -24,18 +24,18 @@ def inject(injection):
|
|||
|
||||
def decorator(callback):
|
||||
"""Dependency injection decorator."""
|
||||
if hasattr(callback, '__injections__'):
|
||||
callback.__injections__ += (injection,)
|
||||
if hasattr(callback, '_injections'):
|
||||
callback._injections += (injection,)
|
||||
|
||||
@wraps(callback)
|
||||
def decorated(*args, **kwargs):
|
||||
"""Decorated with dependency injection callback."""
|
||||
for injection in getattr(decorated, '__injections__'):
|
||||
for injection in getattr(decorated, '_injections'):
|
||||
if injection.name not in kwargs:
|
||||
kwargs[injection.name] = injection.value
|
||||
return callback(*args, **kwargs)
|
||||
|
||||
setattr(decorated, '__injections__', (injection,))
|
||||
setattr(decorated, '_injections', (injection,))
|
||||
|
||||
return decorated
|
||||
return decorator
|
||||
|
|
|
|||
|
|
@ -15,15 +15,15 @@ class Provider(object):
|
|||
"""Base provider class."""
|
||||
|
||||
__IS_PROVIDER__ = True
|
||||
__slots__ = ('overridden',)
|
||||
__slots__ = ('_overridden',)
|
||||
|
||||
def __init__(self):
|
||||
"""Initializer."""
|
||||
self.overridden = None
|
||||
self._overridden = None
|
||||
|
||||
def __call__(self, *args, **kwargs):
|
||||
"""Return provided instance."""
|
||||
if self.overridden:
|
||||
if self._overridden:
|
||||
return self.last_overriding(*args, **kwargs)
|
||||
return self._provide(*args, **kwargs)
|
||||
|
||||
|
|
@ -42,47 +42,52 @@ class Provider(object):
|
|||
|
||||
def override(self, provider):
|
||||
"""Override provider with another provider."""
|
||||
if not self.overridden:
|
||||
self.overridden = (ensure_is_provider(provider),)
|
||||
if not self._overridden:
|
||||
self._overridden = (ensure_is_provider(provider),)
|
||||
else:
|
||||
self.overridden = self.overridden + (ensure_is_provider(provider),)
|
||||
self._overridden += (ensure_is_provider(provider),)
|
||||
|
||||
@property
|
||||
def is_overridden(self):
|
||||
"""Check if provider is overridden by another provider."""
|
||||
return bool(self._overridden)
|
||||
|
||||
@property
|
||||
def last_overriding(self):
|
||||
"""Return last overriding provider."""
|
||||
try:
|
||||
return self.overridden[-1]
|
||||
return self._overridden[-1]
|
||||
except (TypeError, IndexError):
|
||||
raise Error('Provider {0} is not overridden'.format(str(self)))
|
||||
|
||||
def reset_last_overriding(self):
|
||||
"""Reset last overriding provider."""
|
||||
if not self.overridden:
|
||||
if not self._overridden:
|
||||
raise Error('Provider {0} is not overridden'.format(str(self)))
|
||||
self.overridden = self.overridden[:-1]
|
||||
self._overridden = self._overridden[:-1]
|
||||
|
||||
def reset_override(self):
|
||||
"""Reset all overriding providers."""
|
||||
self.overridden = None
|
||||
self._overridden = None
|
||||
|
||||
|
||||
class Delegate(Provider):
|
||||
|
||||
"""Provider's delegate."""
|
||||
|
||||
__slots__ = ('delegated',)
|
||||
__slots__ = ('_delegated',)
|
||||
|
||||
def __init__(self, delegated):
|
||||
"""Initializer.
|
||||
|
||||
:type delegated: Provider
|
||||
"""
|
||||
self.delegated = ensure_is_provider(delegated)
|
||||
self._delegated = ensure_is_provider(delegated)
|
||||
super(Delegate, self).__init__()
|
||||
|
||||
def _provide(self, *args, **kwargs):
|
||||
"""Return provided instance."""
|
||||
return self.delegated
|
||||
return self._delegated
|
||||
|
||||
|
||||
class Factory(Provider):
|
||||
|
|
@ -92,36 +97,36 @@ class Factory(Provider):
|
|||
Factory provider creates new instance of specified class on every call.
|
||||
"""
|
||||
|
||||
__slots__ = ('provides', 'kwargs', 'attributes', 'methods')
|
||||
__slots__ = ('_provides', '_kwargs', '_attributes', '_methods')
|
||||
|
||||
def __init__(self, provides, *injections):
|
||||
"""Initializer."""
|
||||
if not isinstance(provides, class_types):
|
||||
raise Error('Factory provider expects to get class, ' +
|
||||
'got {0} instead'.format(str(provides)))
|
||||
self.provides = provides
|
||||
self.kwargs = tuple((injection
|
||||
for injection in injections
|
||||
if is_kwarg_injection(injection)))
|
||||
self.attributes = tuple((injection
|
||||
for injection in injections
|
||||
if is_attribute_injection(injection)))
|
||||
self.methods = tuple((injection
|
||||
self._provides = provides
|
||||
self._kwargs = tuple((injection
|
||||
for injection in injections
|
||||
if is_method_injection(injection)))
|
||||
if is_kwarg_injection(injection)))
|
||||
self._attributes = tuple((injection
|
||||
for injection in injections
|
||||
if is_attribute_injection(injection)))
|
||||
self._methods = tuple((injection
|
||||
for injection in injections
|
||||
if is_method_injection(injection)))
|
||||
super(Factory, self).__init__()
|
||||
|
||||
def _provide(self, *args, **kwargs):
|
||||
"""Return provided instance."""
|
||||
init_kwargs = dict(((injection.name, injection.value)
|
||||
for injection in self.kwargs))
|
||||
for injection in self._kwargs))
|
||||
init_kwargs.update(kwargs)
|
||||
|
||||
instance = self.provides(*args, **init_kwargs)
|
||||
instance = self._provides(*args, **init_kwargs)
|
||||
|
||||
for attribute in self.attributes:
|
||||
for attribute in self._attributes:
|
||||
setattr(instance, attribute.name, attribute.value)
|
||||
for method in self.methods:
|
||||
for method in self._methods:
|
||||
getattr(instance, method.name)(method.value)
|
||||
|
||||
return instance
|
||||
|
|
@ -144,23 +149,23 @@ class Singleton(Provider):
|
|||
Singleton provider will create instance once and return it on every call.
|
||||
"""
|
||||
|
||||
__slots__ = ('instance', 'factory')
|
||||
__slots__ = ('_instance', '_factory')
|
||||
|
||||
def __init__(self, *args, **kwargs):
|
||||
"""Initializer."""
|
||||
self.instance = None
|
||||
self.factory = Factory(*args, **kwargs)
|
||||
self._instance = None
|
||||
self._factory = Factory(*args, **kwargs)
|
||||
super(Singleton, self).__init__()
|
||||
|
||||
def _provide(self, *args, **kwargs):
|
||||
"""Return provided instance."""
|
||||
if not self.instance:
|
||||
self.instance = self.factory(*args, **kwargs)
|
||||
return self.instance
|
||||
if not self._instance:
|
||||
self._instance = self._factory(*args, **kwargs)
|
||||
return self._instance
|
||||
|
||||
def reset(self):
|
||||
"""Reset instance."""
|
||||
self.instance = None
|
||||
self._instance = None
|
||||
|
||||
|
||||
class ExternalDependency(Provider):
|
||||
|
|
@ -171,26 +176,26 @@ class ExternalDependency(Provider):
|
|||
the client's code, but it's interface is known.
|
||||
"""
|
||||
|
||||
__slots__ = ('instance_of',)
|
||||
__slots__ = ('_instance_of',)
|
||||
|
||||
def __init__(self, instance_of):
|
||||
"""Initializer."""
|
||||
if not isinstance(instance_of, class_types):
|
||||
raise Error('ExternalDependency provider expects to get class, ' +
|
||||
'got {0} instead'.format(str(instance_of)))
|
||||
self.instance_of = instance_of
|
||||
self._instance_of = instance_of
|
||||
super(ExternalDependency, self).__init__()
|
||||
|
||||
def __call__(self, *args, **kwargs):
|
||||
"""Return provided instance."""
|
||||
if not self.overridden:
|
||||
if not self._overridden:
|
||||
raise Error('Dependency is not defined')
|
||||
|
||||
instance = self.last_overriding(*args, **kwargs)
|
||||
|
||||
if not isinstance(instance, self.instance_of):
|
||||
if not isinstance(instance, self._instance_of):
|
||||
raise Error('{0} is not an '.format(instance) +
|
||||
'instance of {0}'.format(self.instance_of))
|
||||
'instance of {0}'.format(self._instance_of))
|
||||
|
||||
return instance
|
||||
|
||||
|
|
@ -207,16 +212,16 @@ class _StaticProvider(Provider):
|
|||
it got on input.
|
||||
"""
|
||||
|
||||
__slots__ = ('provides',)
|
||||
__slots__ = ('_provides',)
|
||||
|
||||
def __init__(self, provides):
|
||||
"""Initializer."""
|
||||
self.provides = provides
|
||||
self._provides = provides
|
||||
super(_StaticProvider, self).__init__()
|
||||
|
||||
def _provide(self, *args, **kwargs):
|
||||
"""Return provided instance."""
|
||||
return self.provides
|
||||
return self._provides
|
||||
|
||||
|
||||
class Class(_StaticProvider):
|
||||
|
|
@ -247,25 +252,25 @@ class Callable(Provider):
|
|||
with some predefined dependency injections.
|
||||
"""
|
||||
|
||||
__slots__ = ('callback', 'injections')
|
||||
__slots__ = ('_callback', '_injections')
|
||||
|
||||
def __init__(self, callback, *injections):
|
||||
"""Initializer."""
|
||||
if not callable(callback):
|
||||
raise Error('Callable expected, got {0}'.format(str(callback)))
|
||||
self.callback = callback
|
||||
self.injections = tuple((injection
|
||||
for injection in injections
|
||||
if is_kwarg_injection(injection)))
|
||||
self._callback = callback
|
||||
self._injections = tuple((injection
|
||||
for injection in injections
|
||||
if is_kwarg_injection(injection)))
|
||||
super(Callable, self).__init__()
|
||||
|
||||
def _provide(self, *args, **kwargs):
|
||||
"""Return provided instance."""
|
||||
injections = dict(((injection.name, injection.value)
|
||||
for injection in self.injections))
|
||||
for injection in self._injections))
|
||||
injections.update(kwargs)
|
||||
|
||||
return self.callback(*args, **injections)
|
||||
return self._callback(*args, **injections)
|
||||
|
||||
|
||||
class Config(Provider):
|
||||
|
|
@ -277,13 +282,13 @@ class Config(Provider):
|
|||
to create deferred config value provider.
|
||||
"""
|
||||
|
||||
__slots__ = ('value',)
|
||||
__slots__ = ('_value',)
|
||||
|
||||
def __init__(self, value=None):
|
||||
"""Initializer."""
|
||||
if not value:
|
||||
value = dict()
|
||||
self.value = value
|
||||
self._value = value
|
||||
super(Config, self).__init__()
|
||||
|
||||
def __getattr__(self, item):
|
||||
|
|
@ -292,7 +297,7 @@ class Config(Provider):
|
|||
|
||||
def _provide(self, paths=None):
|
||||
"""Return provided instance."""
|
||||
value = self.value
|
||||
value = self._value
|
||||
if paths:
|
||||
for path in paths:
|
||||
try:
|
||||
|
|
@ -304,7 +309,7 @@ class Config(Provider):
|
|||
|
||||
def update_from(self, value):
|
||||
"""Update current value from another one."""
|
||||
self.value.update(value)
|
||||
self._value.update(value)
|
||||
|
||||
|
||||
class _ChildConfig(Provider):
|
||||
|
|
@ -315,19 +320,19 @@ class _ChildConfig(Provider):
|
|||
the current path in the config tree.
|
||||
"""
|
||||
|
||||
__slots__ = ('parents', 'root_config')
|
||||
__slots__ = ('_parents', '_root_config')
|
||||
|
||||
def __init__(self, parents, root_config):
|
||||
"""Initializer."""
|
||||
self.parents = parents
|
||||
self.root_config = root_config
|
||||
self._parents = parents
|
||||
self._root_config = root_config
|
||||
super(_ChildConfig, self).__init__()
|
||||
|
||||
def __getattr__(self, item):
|
||||
"""Return instance of deferred config."""
|
||||
return _ChildConfig(parents=self.parents + (item,),
|
||||
root_config=self.root_config)
|
||||
return _ChildConfig(parents=self._parents + (item,),
|
||||
root_config=self._root_config)
|
||||
|
||||
def _provide(self, *args, **kwargs):
|
||||
"""Return provided instance."""
|
||||
return self.root_config(self.parents)
|
||||
return self._root_config(self._parents)
|
||||
|
|
|
|||
|
|
@ -44,12 +44,12 @@ class ProviderTests(unittest.TestCase):
|
|||
delegate1 = self.provider.delegate()
|
||||
|
||||
self.assertIsInstance(delegate1, Delegate)
|
||||
self.assertIs(delegate1.delegated, self.provider)
|
||||
self.assertIs(delegate1(), self.provider)
|
||||
|
||||
delegate2 = self.provider.delegate()
|
||||
|
||||
self.assertIsInstance(delegate2, Delegate)
|
||||
self.assertIs(delegate2.delegated, self.provider)
|
||||
self.assertIs(delegate2(), self.provider)
|
||||
|
||||
self.assertIsNot(delegate1, delegate2)
|
||||
|
||||
|
|
@ -57,7 +57,7 @@ class ProviderTests(unittest.TestCase):
|
|||
"""Test provider overriding."""
|
||||
overriding_provider = Provider()
|
||||
self.provider.override(overriding_provider)
|
||||
self.assertTrue(self.provider.overridden)
|
||||
self.assertTrue(self.provider.is_overridden)
|
||||
|
||||
def test_override_with_not_provider(self):
|
||||
"""Test provider overriding with not provider instance."""
|
||||
|
|
@ -98,7 +98,7 @@ class ProviderTests(unittest.TestCase):
|
|||
self.assertIs(self.provider.last_overriding, overriding_provider1)
|
||||
|
||||
self.provider.reset_last_overriding()
|
||||
self.assertFalse(self.provider.overridden)
|
||||
self.assertFalse(self.provider.is_overridden)
|
||||
|
||||
def test_reset_last_overriding_of_not_overridden_provider(self):
|
||||
"""Test resetting of last overriding on not overridden provier."""
|
||||
|
|
@ -109,12 +109,12 @@ class ProviderTests(unittest.TestCase):
|
|||
overriding_provider = Provider()
|
||||
self.provider.override(overriding_provider)
|
||||
|
||||
self.assertTrue(self.provider.overridden)
|
||||
self.assertTrue(self.provider.is_overridden)
|
||||
self.assertIs(self.provider.last_overriding, overriding_provider)
|
||||
|
||||
self.provider.reset_override()
|
||||
|
||||
self.assertFalse(self.provider.overridden)
|
||||
self.assertFalse(self.provider.is_overridden)
|
||||
try:
|
||||
self.provider.last_overriding
|
||||
except Error:
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user