| 1 | package com.hammurapi.common.extract.tests; |
| 2 | |
| 3 | import java.math.BigDecimal; |
| 4 | import java.util.ArrayList; |
| 5 | import java.util.Collection; |
| 6 | |
| 7 | import com.hammurapi.common.Observable; |
| 8 | import com.hammurapi.common.Observer; |
| 9 | |
| 10 | /** |
| 11 | * Account which notifies observers of changes. |
| 12 | * @author Pavel Vlasov |
| 13 | * |
| 14 | */ |
| 15 | public class ObservableAccount extends Account implements Observable<Account> { |
| 16 | |
| 17 | public ObservableAccount() { |
| 18 | super(); |
| 19 | } |
| 20 | |
| 21 | public ObservableAccount(String customer, int number, BigDecimal balance) { |
| 22 | super(customer, number, balance); |
| 23 | } |
| 24 | |
| 25 | @Override |
| 26 | public void addObserver(Observer<? super Account> o) { |
| 27 | observers.add(o); |
| 28 | } |
| 29 | |
| 30 | @Override |
| 31 | public void deleteObserver(Observer<? super Account> o) { |
| 32 | observers.remove(o); |
| 33 | } |
| 34 | |
| 35 | private Collection<Observer<? super Account>> observers = new ArrayList<Observer<? super Account>>(); |
| 36 | |
| 37 | public int countObservers() { |
| 38 | return observers.size(); |
| 39 | } |
| 40 | |
| 41 | @Override |
| 42 | public void setBalance(BigDecimal balance) { |
| 43 | super.setBalance(balance); |
| 44 | for (Observer<? super Account> o: observers) { |
| 45 | o.update(null, this); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | } |