1 class Composite implements IComponent {

2 private String id;

3 private List<IComponent> list = new ArrayList<IComponent> ();

4

5 public Composite(String id) {

6 this.id = id;

7 }

8

9 public String toString() {

10 StringBuilder buf = new StringBuilder();

11 buf.append(String.format("(%s:", id));

12

13 for (IComponent child : list) {

14 buf.append(" " + child.toString());

15 }

16 buf.append(")");

17

18 return buf.toString();

19 }

20

21 //public List<IComponent> getChildren()

22

23 public Collection getChildren(){

24 return list;

25 }

26

27 public boolean addComponent(IComponent c){

28 return list.add(c);

29 }

30

31 public boolean removeComponent(IComponent c){

32 return list.remove(c);

33 }

34 }