mirror of
https://github.com/ets-labs/python-dependency-injector.git
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52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
"""Utils module."""
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from six import class_types
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from .errors import Error
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def is_provider(instance):
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"""Check if instance is provider instance."""
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return (not isinstance(instance, class_types) and
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getattr(instance, '__IS_PROVIDER__', False) is True)
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def ensure_is_provider(instance):
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"""Check if instance is provider instance, otherwise raise and error."""
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if not is_provider(instance):
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raise Error('Expected provider instance, '
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'got {0}'.format(str(instance)))
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return instance
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def is_injection(instance):
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"""Check if instance is injection instance."""
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return (not isinstance(instance, class_types) and
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getattr(instance, '__IS_INJECTION__', False) is True)
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def ensure_is_injection(instance):
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"""Check if instance is injection instance, otherwise raise and error."""
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if not is_injection(instance):
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raise Error('Expected injection instance, '
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'got {0}'.format(str(instance)))
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return instance
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def is_kwarg_injection(instance):
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"""Check if instance is keyword argument injection instance."""
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return (not isinstance(instance, class_types) and
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getattr(instance, '__IS_KWARG_INJECTION__', False) is True)
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def is_attribute_injection(instance):
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"""Check if instance is attribute injection instance."""
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return (not isinstance(instance, class_types) and
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getattr(instance, '__IS_ATTRIBUTE_INJECTION__', False) is True)
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def is_method_injection(instance):
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"""Check if instance is method injection instance."""
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return (not isinstance(instance, class_types) and
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getattr(instance, '__IS_METHOD_INJECTION__', False) is True)
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