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63 lines
1.9 KiB
Python
63 lines
1.9 KiB
Python
"""Dependency injector catalog utils."""
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import six
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from dependency_injector.utils import _copy_providers
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from dependency_injector.errors import UndefinedProviderError
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def copy(catalog):
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""":py:class:`DeclarativeCatalog` copying decorator.
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This decorator copy all providers from provided catalog to decorated one.
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If one of the decorated catalog providers matches to source catalog
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providers by name, it would be replaced by reference.
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:param catalog: Catalog that should be copied by decorated catalog.
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:type catalog: :py:class:`DeclarativeCatalog`
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:return: Declarative catalog's copying decorator.
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:rtype:
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callable(:py:class:`DeclarativeCatalog`)
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"""
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def decorator(copied_catalog):
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"""Copying decorator.
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:param copied_catalog: Decorated catalog.
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:type copied_catalog: :py:class:`DeclarativeCatalog`
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:return: Decorated catalog.
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:rtype:
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:py:class:`DeclarativeCatalog`
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"""
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memo = dict()
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for name, provider in six.iteritems(copied_catalog.cls_providers):
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try:
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source_provider = catalog.get_provider(name)
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except UndefinedProviderError:
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pass
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else:
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memo[id(source_provider)] = provider
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copied_catalog.bind_providers(_copy_providers(catalog.providers, memo),
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force=True)
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return copied_catalog
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return decorator
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def override(catalog):
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""":py:class:`DeclarativeCatalog` overriding decorator.
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:param catalog: Catalog that should be overridden by decorated catalog.
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:type catalog: :py:class:`DeclarativeCatalog`
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:return: Declarative catalog's overriding decorator.
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:rtype: callable(:py:class:`DeclarativeCatalog`)
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"""
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def decorator(overriding_catalog):
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"""Overriding decorator."""
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catalog.override(overriding_catalog)
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return overriding_catalog
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return decorator
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