/**
 * 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();
        }
    }
    
    
}