StrategyPattern

class Duck{
        public var flyBehavior:FlyBehavior;
        public var quackBehavior:QuackBehavior;

        public function Duck(){

        }
        public function swim():Void{

        }
        public function display():Void{

        }
        public function performQuack():Void{
                quackBehavior.quack();
        }
        public function performFly():Void{
                flyBehavior.fly();
        }
        public function setFlyBehavior(fb:FlyBehavior):Void{
                flyBehavior = fb;
        }
        public function setQuackBehavior(qb:QuackBehavior):Void{
                quackBehavior = qb;
        }
}

////////////////////////////////////////////////

interface FlyBehavior{
        public function fly():Void;
}

////////////////////////////////////////////////

class FlyNoWay implements FlyBehavior{
        public function fly():Void{
                trace("저 안 날아요");
        }
}

////////////////////////////////////////////////

class FlyWithWings implements FlyBehavior{
        public function fly():Void{
                trace("저 날아요");
        }
}

////////////////////////////////////////////////

class ModelDuck extends Duck{
        public function ModelDuck(){
                flyBehavior = new FlyNoWay();
                quackBehavior = new MuteQuack();
        }
        private function display():Void{
                trace("가짜 오리입니다");
        }
}

////////////////////////////////////////////////

class MuteQuack implements QuackBehavior{
        public function quack():Void{
                trace("나 벙어리");
        }
}

///////////////////////////////////////////////

class Quack implements QuackBehavior{
        public function quack():Void{
                trace("꽥꽥");
        }
}

/////////////////////////////////////////////////

interface QuackBehavior{
        public function quack():Void;
}

/////////////////////////////////////////////////

class Squack implements QuackBehavior{
        public function quack():Void{
                trace("삑삑");
        }
}

/////////////////////////////////////////////////

class Main{
        private var myDuck:Duck;
        public function Main(){
                myDuck = new ModelDuck();
                init();
        }
        private function init():Void{
                myDuck.display();
                myDuck.performFly();
                myDuck.performQuack();
                myDuck.setFlyBehavior(new FlyWithWings());
                myDuck.performFly();

        }
}

/////////////////////////////////////////////////