/**

 * 命令模式

 * @author TMAC-J

 * 将调用者和接受者分离

 * 可以将一组命令组合在一起，适合很多命令的时候

 */

public class CommandPattern {

    interface Command{

        void excute();

    }

    public class TVReceiver{

        public void shift(){

            System.out.println("shift");

        }

        public void turnon(){

            System.out.println("turnon");

        }

        public void Turndown(){

            System.out.println("Turndown");

        }

    }

    public class ShiftTV implements Command{

        private TVReceiver tv;

        public ShiftTV(TVReceiver tv) {

            this.tv = tv;

        }

        @Override

        public void excute() {

            tv.shift();

        }

    }

    public class TurnonTV implements Command{

        private TVReceiver tv;

        public TurnonTV(TVReceiver tv) {

            this.tv = tv;

        }

        @Override

        public void excute() {

            tv.turnon();

        }

    }

    public class Turndown implements Command{

        private TVReceiver tv;

        public Turndown(TVReceiver tv) {

            this.tv = tv;

        }

        @Override

        public void excute() {

            tv.Turndown();

        }

    }

    public class Invoker{

        private Command shiftTv,turnon,turndown;

        public Invoker(Command shiftTv,Command turnonTV,Command turndown) {

            this.shiftTv = shiftTv;

            this.turnon = turndown;

            this.turndown = turndown;

        }

        public void shift(){

            shiftTv.excute();

        }

        public void turnon(){

            turnon.excute();

        }

        public void turndown(){

            turndown.excute();

        }

    }

    public class Client{

        public void test(){

            TVReceiver tv = new TVReceiver();

            Invoker invoker = new Invoker(new ShiftTV(tv), new TurnonTV(tv), new Turndown(tv));

            invoker.shift();

            invoker.turnon();

            invoker.turndown();

        }

    }

}