mirror of
https://github.com/ets-labs/python-dependency-injector.git
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59b98959bc
Also current commit contains: - Some refactoring of internals - Additional unit tests for Factory and Singleton providers
89 lines
2.7 KiB
Python
89 lines
2.7 KiB
Python
"""Utils module."""
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import threading
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import six
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from .errors import Error
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GLOBAL_LOCK = threading.RLock()
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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, six.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 and return it.
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:raise: Error if provided instance is not provider.
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"""
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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, six.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_arg_injection(instance):
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"""Check if instance is positional argument injection instance."""
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return (not isinstance(instance, six.class_types) and
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getattr(instance, '__IS_ARG_INJECTION__', False) is True)
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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, six.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, six.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, six.class_types) and
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getattr(instance, '__IS_METHOD_INJECTION__', False) is True)
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def is_catalog(instance):
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"""Check if instance is catalog instance."""
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return (isinstance(instance, six.class_types) and
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getattr(instance, '__IS_CATALOG__', False) is True)
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def is_catalog_bundle(instance):
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"""Check if instance is catalog bundle instance."""
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return (not isinstance(instance, six.class_types) and
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getattr(instance, '__IS_CATALOG_BUNDLE__', False) is True)
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def ensure_is_catalog_bundle(instance):
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"""Check if instance is catalog bundle instance and return it.
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:raise: Error if provided instance is not catalog bundle.
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"""
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if not is_catalog_bundle(instance):
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raise Error('Expected catalog bundle instance, '
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'got {0}'.format(str(instance)))
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return instance
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