mirror of
https://github.com/ets-labs/python-dependency-injector.git
synced 2024-11-22 17:47:02 +03:00
68 lines
1.4 KiB
Python
68 lines
1.4 KiB
Python
"""Injections module."""
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from six import wraps
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from .utils import is_provider
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from .utils import ensure_is_injection
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class Injection(object):
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"""Base injection class."""
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__IS_OBJECTS_INJECTION__ = True
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__slots__ = ('name', 'injectable')
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def __init__(self, name, injectable):
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"""Initializer."""
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self.name = name
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self.injectable = injectable
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@property
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def value(self):
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"""Return injectable value."""
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if is_provider(self.injectable):
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return self.injectable()
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return self.injectable
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class KwArg(Injection):
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"""Keyword argument injection."""
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__IS_OBJECTS_KWARG_INJECTION__ = True
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class Attribute(Injection):
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"""Attribute injection."""
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__IS_OBJECTS_ATTRIBUTE_INJECTION__ = True
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class Method(Injection):
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"""Method injection."""
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__IS_OBJECTS_METHOD_INJECTION__ = True
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def inject(injection):
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"""Inject decorator.
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:type injection: Injection
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:return: (callable) -> (callable)
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"""
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injection = ensure_is_injection(injection)
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def decorator(callback):
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"""Decorator."""
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@wraps(callback)
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def decorated(*args, **kwargs):
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"""Decorated."""
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if injection.name not in kwargs:
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kwargs[injection.name] = injection.value
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return callback(*args, **kwargs)
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return decorated
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return decorator
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