public class DecoratorClient {

  public static void main(String[] args) {
    DecoratorClient s = new DecoratorClient();
    s.printTicket();
  }

  public void printTicket() {
    // Get an object decorated dynamically
    Component myST = Configuration.getSalesTicket();
    myST.printTicket();
  }

  // calcSalesTax ...
}

abstract class Component {
  abstract public void printTicket();
}

//Instances of this class are the sales tickets 
//that may be decorated
class SalesTicket extends Component {
  @Override
  public void printTicket() {
    // Hard coded here, but simpler than 
    // adding a new Customer class now
    System.out.println("Customer: Kim");
    System.out.println("The sales ticket itself");
    System.out.println("Total: $123.45");
  }
}

abstract class TicketDecorator extends Component {
  private Component myComponent;

  public TicketDecorator() {
    myComponent = null;
  }

  public TicketDecorator(Component c) {
    myComponent = c;
  }

  @Override
  public void printTicket() {
    if (myComponent != null)
      myComponent.printTicket();
  }
}

class HeaderDecorator1 extends TicketDecorator {
  public HeaderDecorator1(Component c) {
    super(c);
  }

  @Override
  public void printTicket() {
    this.printHeader();
    super.printTicket();
  }

  public void printHeader() {
    System.out.println("@@ Header One @@");
  }
}

class FooterDecorator1 extends TicketDecorator {
  public FooterDecorator1(Component c) {
    super(c);
  }

  @Override
  public void printTicket() {
    super.printTicket();
    this.printFooter();
  }

  public void printFooter() {
    System.out.println("%% FOOTER one %%");
  }
}

class HeaderDecorator2 extends TicketDecorator {
  public HeaderDecorator2(Component c) {
    super(c);
  }

  @Override
  public void printTicket() {
    this.printHeader();
    super.printTicket();
  }

  public void printHeader() {
    System.out.println(">> Header Two <<");
  }
}

class FooterDecorator2 extends TicketDecorator {
  public FooterDecorator2(Component c) {
    super(c);
  }

  @Override
  public void printTicket() {
    super.printTicket();
    this.printFooter();
  }

  public void printFooter() {
    System.out.println("## FOOTER two ##");
  }
}

//This object would determine how to decorate the SalesTicket. 
class Configuration {
  public static Component getSalesTicket() {
    // Return a decorated SalesTicket
    return 
       new HeaderDecorator1(
         new HeaderDecorator2(
            new FooterDecorator2(
               new FooterDecorator1(
                    new SalesTicket()))));
  }
}