import java.util.Random;

/**
 * Class that models a bank customer, with a specific ID number,
 * arrival time, and (random) transaction length.
 * 
 * @author Dave Reed
 * @version 4/15/05
 */
public class Customer
{
	private static final int MAX_LENGTH = 8;
	private static final Random rand = new Random();
	private static int nextID = 1;
	
	private int customerID;
	private int arrivalTime;
	private int jobLength;

	/**
	 * Constructs a customer with the next available ID number,
	 * the specified arrival time, and a random job length.
	 *   @param arrTime the time at which the customer arrives
	 */
	public Customer(int arrTime)
	{
		customerID = nextID;
		nextID++;
		arrivalTime = arrTime;
		jobLength = rand.nextInt(MAX_LENGTH)+1;
	}

    /**
     * Accessor method for getting the customer's ID number.
     *   @return the customer ID
     */
	public int getID()
	{
		return customerID;
	}
	
	/**
	 * Accessor method for getting the customer's arrival time.
	 *   @return the time at which the customer arrived
	 */
	public int getArrivalTime()
	{
	    return arrivalTime;
	}
	
	/**
	 * Accessor method for getting the length of the job
	 *   @return the job length (in minutes)
	 */
	public int getJobLength()
	{
	    return jobLength;
	}
}