ATM Simulation Implementation

// ATM Simulation Implementation - the ATM itself

ATM Simulation Implementation - the ATM itself


/*
 * Example ATM simulation - file ATM.java
 *
 * This file implements the class that manages the ATM itself
 *
 * Copyright (c) 1997 - Russell C. Bjork
 *
 */

package atm;
import java.awt.*;
import atm.atmparts.*;
import atm.util.Status;
import atm.util.Money;

//

Class ATM


public class ATM

  {
    //


    public ATM(int number, String location, Bank bank, Container container)
      {
        super();
        
        _number = number;
        _location = location;
        _bank = bank;
        
        _cardReader = new CardReader();
        _display = new Display();
        _keyboard = new Keyboard();
        _cashDispenser = new CashDispenser();
        _envelopeAcceptor = new EnvelopeAcceptor();
        _receiptPrinter = new ReceiptPrinter();
        _operatorPanel = new OperatorPanel();

        GUILayout.doLayout(container,
                           _cardReader, _display, _keyboard, _cashDispenser,
                           _envelopeAcceptor, _receiptPrinter, _operatorPanel);
      }

    //


    public synchronized Money startupOperation()
      { 
        // Wait for switch to be turned on.  Message will blink on and off
        // to tell user what to do

        while (! _operatorPanel.switchOn()) 
            try
              { Thread.sleep(1000); }
            catch (InterruptedException e)
              { }
        _state = RUNNING;
        return _operatorPanel.getInitialCash(); 
      }

    //


    public void serviceCustomers(Money initialCash)
      {
        _cashDispenser.setCash(initialCash);

        while (_state == RUNNING)
          { 
            int readerStatus = CardReader.NO_CARD;  // Initialization needed only
                                                    // to keep the compiler happy!
            _display.requestCard();
            do
              { 
                if (! _operatorPanel.switchOn())
                    _state = STOPPED;
                else
                    readerStatus = _cardReader.checkForCardInserted();
              }
            while (_state == RUNNING && readerStatus == CardReader.NO_CARD);
            _display.clearDisplay();
            
            if (_state == RUNNING)
              switch (readerStatus)
                {
                  case CardReader.CARD_HAS_BEEN_READ:      
                    {
                      Session session = new Session(_cardReader.cardNumber(),
                                                    this,
                                                    _bank);
                      session.doSessionUseCase();
                      break;
                    }

                  case CardReader.UNREADABLE_CARD:

                    _display.reportCardUnreadable();
                    _cardReader.ejectCard();
                    _display.clearDisplay();
                }
          }
      }


    //

        
    public int getPIN()
      { _display.requestPIN();
        int PIN = _keyboard.readPIN(_display);
        _display.clearDisplay();
        return PIN;
      }
    
    
    //

    
    public int getMenuChoice(String whatToChoose,
                      int numItems,
                      String items[])
      { _display.displayMenu(whatToChoose, numItems, items);
        int choice =  _keyboard.readMenuChoice(numItems);
        _display.clearDisplay();
        return choice;
      }
    
    
    //

    
    public Money getAmountEntry()
      { _display.requestAmountEntry();
        Money amount = _keyboard.readAmountEntry(_display);
        _display.clearDisplay();
        return amount;
      }
    
    
    //

    
    public boolean checkIfCashAvailable(Money amount)
      { return ! _cashDispenser.currentCash().less(amount);
      }
    
    
    //

    
    public void dispenseCash(Money amount)
      { _cashDispenser.dispenseCash(amount);
      }
    
    
    //

    
    public boolean acceptEnvelope()
      { return _envelopeAcceptor.acceptEnvelope(); 
      }
    
    
    //

    
    public void issueReceipt(int cardNumber,
                             int serialNumber,
                             String description,
                             Money amount,
                             Money balance,
                             Money availableBalance)
      { 
        _receiptPrinter.printReceipt(_number, _location, cardNumber, serialNumber,
                                     description, amount,
                                     balance, availableBalance);;
      }
    
    
    //

    
    public int reEnterPIN()
      { _display.requestReEnterPIN();
        int PIN = _keyboard.readPIN(_display);
        _display.clearDisplay();
        return PIN;
      }
    
    
    //

    
    public boolean reportTransactionFailure(String explanation)
      { _display.reportTransactionFailure(explanation);
        int response = _keyboard.readMenuChoice(2);
        _display.clearDisplay();
        return response == 1;
      }
    
    
    //

    
    public void ejectCard()
      { _cardReader.ejectCard();
      }
    
    
    //

    
    public void retainCard()
      { _display.reportCardRetained();
        _cardReader.retainCard(); 
        _display.clearDisplay();
      }
      
    
    //

    
    public int number()
      { return _number; }
    
    //

    
    // Private instance variables

    private int              _number;
    private String           _location;
    private Bank             _bank;
    
    // Values for _state instance variable

    private static final int RUNNING = 0;
    private static final int STOPPED = 1;
    
    private int              _state;

    private CardReader       _cardReader;
    private Display          _display;
    private Keyboard         _keyboard;
    private CashDispenser    _cashDispenser;
    private EnvelopeAcceptor _envelopeAcceptor;
    private ReceiptPrinter   _receiptPrinter;
    private OperatorPanel    _operatorPanel;
  }
        
//