FP_BankDatabse_VM

public class BankDatabase
{
    private Card[] cards;

    public BankDatabase()
    {
        cards = new Card[ 2 ];

        cards[ 0 ] = new Card( 1, 20000);
        cards[ 1 ] = new Card( 2, 1000);
    }

    private Card getCard( int cardNumber )
    {
        for ( Card currentCard : cards )
        {
            if ( currentCard.getCardNumber() == cardNumber ) return currentCard;
        }

        return null;
    }

    public boolean authenticateUser(int userCardNumber)
    {
        Card userCard = getCard( userCardNumber );

        if ( userCard != null )
            return userCard.validateCard( userCardNumber );
        else
            return false;
    }

    public double getAvailableBalance( int userCardNumber )
    {
        return getCard( userCardNumber ).getAvailableBalance();
    }

    public void debit( int userCardNumber, double amount )
    {
        getCard( userCardNumber ).debit( amount );
    }
}