97 lines
2.5 KiB
Python
97 lines
2.5 KiB
Python
"""
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实例：
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汤宝宝一时想不开，当了房产中介。
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他负责把房东和租客撮合在一起，帮他们达成租房协议。
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"""
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from abc import ABC, abstractmethod
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# 抽象同事类
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class Colleague(ABC):
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@abstractmethod
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def send(self, event: str) -> None:
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pass
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@abstractmethod
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def receive(self, event: str) -> None:
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pass
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# 抽象中介者
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class Mediator(ABC):
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@abstractmethod
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def notify(self, sender: Colleague, event: str) -> None:
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pass
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@abstractmethod
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def register(self, colleague: Colleague) -> None:
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pass
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# 具体同事类：房东
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class Landlord(Colleague):
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mediator: Mediator
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name: str
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def __init__(self, mediator: Mediator, name: str) -> None:
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self.mediator = mediator
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self.name = name
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self.mediator.register(self)
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def send(self, event: str) -> None:
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print(f"房东{self.name}发布信息: {event}")
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self.mediator.notify(self, event)
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def receive(self, event: str) -> None:
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print(f"房东{self.name}收到通知: {event}")
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# 具体同事类：租客
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class Tenant(Colleague):
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mediator: Mediator
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name: str
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def __init__(self, mediator: Mediator, name: str) -> None:
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self.mediator = mediator
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self.name = name
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self.mediator.register(self)
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def send(self, event: str) -> None:
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print(f"租客{self.name}发布需求: {event}")
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self.mediator.notify(self, event)
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def receive(self, event: str) -> None:
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print(f"租客{self.name}收到通知: {event}")
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# 具体中介者类
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class HousingMediator(Mediator):
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colleagues: list[Colleague] = []
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def register(self, colleague: Colleague) -> None:
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if colleague not in self.colleagues:
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self.colleagues.append(colleague)
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def notify(self, sender: Colleague, event: str) -> None:
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for colleague in self.colleagues:
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if colleague != sender:
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colleague.receive(event)
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if __name__ == "__main__":
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print("============= 中介者模式 =============")
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mediator = HousingMediator()
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landlord1 = Landlord(mediator, "张三")
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landlord2 = Landlord(mediator, "李四")
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tenant1 = Tenant(mediator, "王五")
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tenant2 = Tenant(mediator, "赵六")
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landlord1.send("张三有一套两室一厅的房子出租，月租2000元。")
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print("-----")
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tenant1.send("王五需要一套三室的房子，预算3000元/月。")
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print("\n=========== 中介者模式结束 ===========")
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