airline
Class AirlineSystem

java.lang.Object
  airline.AirlineSystem

All Implemented Interfaces:

Serializable

public class AirlineSystem
extends Object
implements Serializable

The AirlineSystem manages the overall set of databases for users, flights, and reservations.

Author:

Michael Goldwasser

See Also:

Serialized Form

Nested Class Summary

private class	AirlineSystem.FlightDB A container of existing Flights
private class	AirlineSystem.UserDB A container of existing system Users.

Field Summary

private AirlineSystem.FlightDB	flights The set of flights for the airline system
private AirlineSystem.UserDB	users The set of registered users for the airline system

Constructor Summary

AirlineSystem()
Create a new AirlineSystem.

Method Summary

void	addFlight(Flight f) Adds a Flight to the system.
void	addUser(User usr) Adds a User to the system.
void	ExportData(ObjectOutputStream oos) Serialize the entire AirlineSystem to an output stream.
Iterator<Flight>	getAllFlights() Returns an array of all flights currently in the system.
Iterator<User>	getAllUsers() Returns an array of all flights currently in the system.
Flight	getFlight(String flightCode) Returns the Flight with the given flight code (e.g., "UA200").
User	getUser(String ID) Returns the User associated with the given ID.
void	ImportData(ObjectInputStream ois) Load a previously exported version of the AirlineSystem.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

flights

private AirlineSystem.FlightDB flights

The set of flights for the airline system

users

private AirlineSystem.UserDB users

The set of registered users for the airline system

Constructor Detail

AirlineSystem

public AirlineSystem()

Create a new AirlineSystem. System initially has a single administrative user with credentials: username="admin", password="secret"

Method Detail

addFlight

public void addFlight(Flight f)
               throws IllegalArgumentException

Adds a Flight to the system. The caller is responsible for ensuring that the new flight has been properly configured prior to entry into the system.

Parameters:

f - the new flight

Throws:

IllegalArgumentException - if system has existing flight with same flight number.

addUser

public void addUser(User usr)
             throws IllegalArgumentException

Adds a User to the system. The caller is responsible for ensuring that the new customer has been properly configured prior to entry into the system.

Parameters:

usr - the new User

Throws:

IllegalArgumentException - if system has existing customer with same ID.

ExportData

public void ExportData(ObjectOutputStream oos)
                throws IOException

Serialize the entire AirlineSystem to an output stream.

Parameters:

oos - An ObjectOutputStream such as a FileOutputStream.

Throws:

IOException

getAllFlights

public Iterator<Flight> getAllFlights()

Returns an array of all flights currently in the system.

Returns:

array of Flight instances

getAllUsers

public Iterator<User> getAllUsers()

Returns an array of all flights currently in the system.

Returns:

array of Flight instances

getFlight

public Flight getFlight(String flightCode)

Returns the Flight with the given flight code (e.g., "UA200"). If no such flight exists, returns null.

Parameters:

flightCode - a flight code (e.g., "UA200")

Returns:

Flight with given code, if it exists; otherwise null.

getUser

public User getUser(String ID)

Returns the User associated with the given ID. Returns null if the ID is not found.

Parameters:

ID - The customer ID

Returns:

reference to the User instance; null if ID not found.

ImportData

public void ImportData(ObjectInputStream ois)
                throws IOException,
                       ClassNotFoundException

Load a previously exported version of the AirlineSystem.

Parameters:

ois - An open ObjectInputStream such as a FileInputStream.

Throws:

IOException

ClassNotFoundException