1: // Transaction.java
2: // Abstract superclass Transaction represents an ATM transaction
4: public abstract class Transaction
5: {
6: private int accountNumber; // indicates account involved
7: private Screen screen; // ATM's screen
8: private BankDatabase bankDatabase; // account info database
10: // Transaction constructor invoked by subclasses using super()
11: public Transaction( int userAccountNumber, Screen atmScreen,
12: BankDatabase atmBankDatabase )
13: {
14: accountNumber = userAccountNumber;
15: screen = atmScreen;
16: bankDatabase = atmBankDatabase;
17: } // end Transaction constructor
19: // return account number
20: public int getAccountNumber()
21: {
22: return accountNumber;
23: } // end method getAccountNumber
25: // return reference to screen
26: public Screen getScreen()
27: {
28: return screen;
29: } // end method getScreen
31: // return reference to bank database
32: public BankDatabase getBankDatabase()
33: {
34: return bankDatabase;
35: } // end method getBankDatabase
37: // perform the transaction (overridden by each subclass)
38: abstract public void execute();
39: } // end class Transaction
43: /**************************************************************************
44: * (C) Copyright 1992-2005 by Deitel & Associates, Inc. and *
45: * Pearson Education, Inc. All Rights Reserved. *
46: * *
47: * DISCLAIMER: The authors and publisher of this book have used their *
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49: * development, research, and testing of the theories and programs *
50: * to determine their effectiveness. The authors and publisher make *
51: * no warranty of any kind, expressed or implied, with regard to these *
52: * programs or to the documentation contained in these books. The authors *
53: * and publisher shall not be liable in any event for incidental or *
54: * consequential damages in connection with, or arising out of, the *
55: * furnishing, performance, or use of these programs. *
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