airline
Class AirlineSystem.FlightDB

java.lang.Object
  airline.AirlineSystem.FlightDB

All Implemented Interfaces:

Serializable

Enclosing class:

AirlineSystem

private class AirlineSystem.FlightDB
extends Object
implements Serializable

A container of existing Flights

Author:

Michael Goldwasser

Field Summary

private HashMap<String,Flight>

map We maintain underlying collection as a HashMap

Constructor Summary

AirlineSystem.FlightDB()
Creates an initially empty database.

Method Summary

void	add(Flight f) Adds a Flight to the system.
Flight	getFlight(String code) Returns the Flight associated with the given code.
Iterator<Flight>	iterator() Returns an iterator of Flight instances.

Methods inherited from class java.lang.Object

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

Field Detail

map

private HashMap<String,Flight> map

We maintain underlying collection as a HashMap

Constructor Detail

AirlineSystem.FlightDB

public AirlineSystem.FlightDB()

Creates an initially empty database.

Method Detail

add

public void add(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.

getFlight

public Flight getFlight(String code)

Returns the Flight associated with the given code. Returns null if the code is not found.

Parameters:

code - The flight code (e.g., "UA200")

Returns:

reference to the Flight instance; null if code not found.

iterator

public Iterator<Flight> iterator()

Returns an iterator of Flight instances.

Returns:

Iterator of Flight instances;