README.md

Bridge

Decouple an abstraction from its implementation allowing the two to vary independently.

Source: wikipedia.org

Swift Example

protocol Switch {
    var appliance: Appliance {get set}
    func turnOn()
}

protocol Appliance {
    func run()
}

class RemoteControl: Switch {
    var appliance: Appliance

    func turnOn() {
        self.appliance.run()
    }
    
    init(appliance: Appliance) {
        self.appliance = appliance
    }
}

class TV: Appliance {
    func run() {
        print("tv turned on");
    }
}

class VacuumCleaner: Appliance {
    func run() {
        print("vacuum cleaner turned on")
    }
}

Swift Usage

var tvRemoteControl = RemoteControl(appliance: TV())
tvRemoteControl.turnOn()

var fancyVacuumCleanerRemoteControl = RemoteControl(appliance: VacuumCleaner())
fancyVacuumCleanerRemoteControl.turnOn()

Kotlin Example

interface Switch {
    var appliance: Appliance
    fun turnOn()
}

interface Appliance {
    fun run()
}

class RemoteControl(override var appliance: Appliance) : Switch {

    override fun turnOn() {
        appliance.run()
    }
    
}

class TV: Appliance {
    override fun run() {
        println("tv turned on")
    }
}

class VacuumCleaner: Appliance {
    override fun run() {
        println("vacuum cleaner turned on")
    }
}

Kotlin Usage

var tvRemoteControl = RemoteControl(appliance = TV())
tvRemoteControl.turnOn()

var fancyVacuumCleanerRemoteControl = RemoteControl(appliance = VacuumCleaner())
fancyVacuumCleanerRemoteControl.turnOn()