meadsteve /
lagom
| Total Complexity | 7 |
| Total Lines | 39 |
| Duplicated Lines | 0 % |
| Coverage | 100% |
| Changes | 0 | ||
| 1 | 1 | from typing import Optional, Callable |
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| 2 | |||
| 3 | 1 | from .interfaces import ReadableContainer, ExtendableContainer |
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| 4 | |||
| 5 | |||
| 6 | 1 | class TemporaryInjectionContext: |
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| 7 | """ |
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| 8 | Context Manager wrapper around a container which applies the supplied function on |
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| 9 | __enter__ |
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| 10 | """ |
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| 11 | |||
| 12 | 1 | _base_container: ExtendableContainer |
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| 13 | 1 | _update_function: Optional[Callable[[ReadableContainer], ReadableContainer]] = None |
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| 14 | |||
| 15 | 1 | def __init__( |
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| 16 | self, |
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| 17 | container: ExtendableContainer, |
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| 18 | update_function: Optional[ |
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| 19 | Callable[[ReadableContainer], ReadableContainer] |
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| 20 | ] = None, |
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| 21 | ): |
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| 22 | 1 | self._base_container = container |
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| 23 | 1 | self._update_function = update_function |
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| 24 | 1 | if self._update_function: |
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| 25 | 1 | self._build_temporary_container = lambda: self._update_function( |
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| 26 | self._base_container |
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| 27 | ) |
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| 28 | else: |
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| 29 | 1 | self._build_temporary_container = lambda: self._base_container.clone() |
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| 30 | |||
| 31 | 1 | def __enter__(self) -> ReadableContainer: |
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| 32 | 1 | return self._build_temporary_container() |
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| 33 | |||
| 34 | 1 | def __exit__(self, exc_type, exc_val, exc_tb): |
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| 35 | 1 | pass |
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| 36 | |||
| 37 | 1 | def rebind(self, new_container): |
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| 38 | return TemporaryInjectionContext(new_container, self._update_function) |
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| 39 |
