package btp.oneP;

import java.util.Date;

public class Decoration {

public static void main(String[] args) {

TimeStamped t = new TimeStamped(new Basic());

TimeStamped t2 = new TimeStamped(new SerialNumbered(new Basic()));

//t2.getSerialNumber();//Not available

System.out.println(t2.getStamp());

SerialNumbered s = new SerialNumbered(new Basic());

SerialNumbered s2 = new SerialNumbered(new TimeStamped(new Basic()));

SerialNumbered s3 = new SerialNumbered(new TimeStamped(new Basic()));

System.out.println(s.getSerialNumber());

System.out.println(s2.getSerialNumber());

System.out.println(s3.getSerialNumber());

//s2.getStamp();//Not available

}

}

class Basic{

private String value;

public void set(String value){

this.value = value;

}

public String get(){

return value;

}

}

class Decorator extends Basic{

protected Basic basic;

public Decorator(Basic basic){

this.basic = basic;

}

public void set(String val){

basic.set(val);

}

public String get(){

return basic.get();

}

}

class TimeStamped extends Decorator{

private final long timeStamp;

public TimeStamped(Basic basic) {

super(basic);

timeStamp = new Date().getTime();

}

public long getStamp(){

return timeStamp;

}

}

class SerialNumbered extends Decorator{

private static long counter = 1;

private final long serialNumber = counter++;

public SerialNumbered(Basic basic) {

super(basic);

}

public long getSerialNumber(){

return serialNumber;

}

}