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Factory Pattern examples using ES6 syntax
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class Car { | |
constructor(doors = 4, state = "brand new", color = "silver") { | |
this.doors = doors | |
this.state = state | |
this.color = color | |
} | |
} | |
class Truck { | |
constructor(state = "used", wheelSize = "large", color = "blue") { | |
this.state = state | |
this.wheelSize = wheelSize | |
this.color = color | |
} | |
} | |
class VehicleFactory { | |
vehicleClass = Car | |
createVehicle = (type, props) => { | |
switch(type) { | |
case "car": | |
return new this.vehicleClass(props.doors, props.state, props.color) | |
case "truck": | |
return new this.vehicleClass(props.state, props.wheelSize, props.color) | |
} | |
} | |
} | |
// Let's build a vehicle factory! | |
const factory = new VehicleFactory() | |
const car = factory.createVehicle( "car", { | |
doors: 6, | |
color: "green" | |
}) | |
console.log(JSON.stringify(car)) | |
const truck = factory.createVehicle( "truck", { | |
state: "like new", | |
color: "red", | |
wheelSize: "small" | |
}) | |
console.log(JSON.stringify(truck)) | |
// Let's build a truck factory! | |
class TruckFactory extends VehicleFactory { | |
vehicleClass = Truck | |
} | |
const truckFactory = new TruckFactory() | |
const bigTruck = truckFactory.createVehicle( "truck", { | |
state: "omg ... so bad", | |
color: "pink", | |
wheelSize: "so BIG" | |
}) | |
console.log(JSON.stringify(bigTruck)) |
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