实现代理模式示例，添加火车站和代售点类，增强代码可读性
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IvisTang
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package main
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import "fmt"
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/*
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实例：
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汤宝宝买火车票，可以去火车站买，也可以去代售点买，但是汤宝宝选择全都要。然而，火车站总共只剩两张票，这可苦了小明了。
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*/
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type Seller interface {
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Sell(name string) error
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}
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type TrainStation struct {
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stock int
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}
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func newTrainStation(stock int) *TrainStation {
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fmt.Printf("火车站库存%d张票\n", stock)
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return &TrainStation{stock: stock}
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}
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func (ts *TrainStation) Sell(name string) error {
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fmt.Printf("%s去火车站买票。\n", name)
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if ts.stock > 0 {
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ts.stock--
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fmt.Printf("%s在火车站买到一张火车票。\n", name)
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return nil
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} else {
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fmt.Printf("火车站没有票了, %s没买到票。\n", name)
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return fmt.Errorf("no ticket")
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}
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}
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type TicketAgency struct {
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name string
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station *TrainStation
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}
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func newTicketAgency(name string, station *TrainStation) *TicketAgency {
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return &TicketAgency{name: name, station: station}
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}
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func (tp *TicketAgency) Sell(name string) error {
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fmt.Printf("%s去%s买票。\n", name, tp.name)
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err := tp.station.Sell(tp.name)
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if err != nil {
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fmt.Printf("%s在%s没买到票。\n", name, tp.name)
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return err
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}
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fmt.Printf("%s在%s买到一张火车票。\n", name, tp.name)
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return nil
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}
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func main() {
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fmt.Println("============= 代理模式 =============")
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station := newTrainStation(2)
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agency := newTicketAgency("代售点A", station)
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station.Sell("汤宝宝")
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agency.Sell("汤宝宝")
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fmt.Println()
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agency.Sell("小明")
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station.Sell("小明")
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fmt.Println()
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fmt.Println("=========== 代理模式结束 ===========")
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}
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"""
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实例：
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汤宝宝买火车票，可以去火车站买，也可以去代售点买，但是汤宝宝选择全都要。然而，火车站总共只剩两张票，这可苦了小明了。
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"""
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from abc import ABC, abstractmethod
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class Seller(ABC):
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@abstractmethod
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def sell(self, name: str) -> bool:
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pass
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class TrainStation(Seller):
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stock: int
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def __init__(self, stock: int) -> None:
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print(f"火车站库存{stock}张票")
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self.stock = stock
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def sell(self, name: str) -> bool:
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print(f"{name}去火车站买票。")
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if self.stock > 0:
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self.stock -= 1
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print(f"{name}在火车站买到一张火车票。")
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return True
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else:
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print(f"火车站没票了，{name}没买到票。")
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return False
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class TicketAgency(Seller):
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name: str
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station: TrainStation
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def __init__(self, name: str, station: TrainStation) -> None:
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self.name = name
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self.station = station
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def sell(self, name: str) -> bool:
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print(f"{name}去{self.name}买票。")
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result = self.station.sell(self.name)
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if result:
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print(f"{name}在{self.name}买到一张火车票。")
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else:
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print(f"{name}在{self.name}没买到票。")
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return result
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if __name__ == "__main__":
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print("============= 代理模式 =============")
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station = TrainStation(stock=2)
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agency = TicketAgency(name="代售点A", station=station)
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station.sell("汤宝宝")
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agency.sell("汤宝宝")
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print("")
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agency.sell("小明")
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station.sell("小明")
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print("\n=========== 代理模式结束 ===========")
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@ -0,0 +1,64 @@
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/*
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实例：
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汤宝宝买火车票，可以去火车站买，也可以去代售点买，但是汤宝宝选择全都要。然而，火车站总共只剩两张票，这可苦了小明了。
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*/
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interface Seller {
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sell(name: string): boolean;
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}
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class TrainStation implements Seller {
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private stock: number;
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constructor(stock: number) {
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console.log(`火车站库存${stock}张票`);
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this.stock = stock;
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}
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sell(name: string): boolean {
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console.log(`${name}去火车站买票`);
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if (this.stock > 0) {
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this.stock--;
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console.log(`${name}在火车站买到一张火车票。`);
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return true;
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}else {
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console.log(`火车站没有票了, ${name}没买到票。`);
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return false;
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}
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}
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}
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class TicketAgency implements Seller {
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name: string;
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private station: TrainStation;
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constructor(name: string, station: TrainStation) {
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this.name = name;
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this.station = station;
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}
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sell(name: string): boolean {
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console.log(`${name}去${this.name}买票`);
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const result = this.station.sell(this.name);
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if (result) {
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console.log(`${name}在${this.name}买到一张火车票。`);
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return true;
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} else {
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console.log(`${name}在${this.name}没买到票。`);
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return false;
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}
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}
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}
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(function(){
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console.log("============= 代理模式 =============");
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const station = new TrainStation(2);
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const agency = new TicketAgency("代售点A", station);
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station.sell("汤宝宝");
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agency.sell("汤宝宝");
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console.log()
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agency.sell("小明");
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station.sell("小明");
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console.log("\n=========== 代理模式结束 ===========");
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})()
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