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https://github.com/rjNemo/design-patterns
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* doc: create package & update general TOCs * doc: add documentation * add code example * reformat using black
42 lines
1.2 KiB
Python
42 lines
1.2 KiB
Python
from structural.flyweight.flyweight_factory import FlyweightFactory
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def add_car_to_police_database(
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factory: FlyweightFactory,
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plates: str,
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owner: str,
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brand: str,
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model: str,
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color: str,
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) -> None:
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print("\n\nClient: Adding a car to database.")
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flyweight = factory.get_flyweight([brand, model, color])
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# The client code either stores or calculates extrinsic state and passes it
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# to the flyweight's methods.
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flyweight.operation([plates, owner])
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if __name__ == "__main__":
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"""
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The client code usually creates a bunch of pre-populated flyweights in the
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initialization stage of the application.
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"""
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factory = FlyweightFactory(
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[
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["Chevrolet", "Camaro2018", "pink"],
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["Mercedes Benz", "C300", "black"],
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["Mercedes Benz", "C500", "red"],
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["BMW", "M5", "red"],
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["BMW", "X6", "white"],
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]
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)
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factory.list_flyweights()
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add_car_to_police_database(factory, "CL234IR", "James Doe", "BMW", "M5", "red")
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add_car_to_police_database(factory, "CL234IR", "James Doe", "BMW", "X1", "red")
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print("\n")
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factory.list_flyweights()
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