CitiesAndAirportsRegistry (TP4 API)

java.lang.Object
- com.uca.flights.CitiesAndAirportsRegistry

public class CitiesAndAirportsRegistry
extends java.lang.Object

Represent an registry to store city and airports, singleton

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static void`	`add(Airport a)`	Add an airport to the airport registry
`static void`	`add(City c)`	Add a city to the city registry
`static java.util.Collection<Airport>`	`airports()`	Get a collection of airportId
`static java.util.Collection<City>`	`cities()`	Get a collection of cityId
`static Airport`	`get(AirportId id)`	Get a airport from the airport registry
`static City`	`get(CityId code)`	Get a city from the city registry
`static CitiesAndAirportsRegistry`	`getInstance()`	Singleton getInstance method.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - getInstance
```
public static CitiesAndAirportsRegistry getInstance()
```
    Singleton getInstance method.
    
    Returns:
    
    the instance of singleton
  - add
```
public static void add(City c)
```
    Add a city to the city registry
    
    Parameters:
    
    c - the city to add
    
    Throws:
    
    java.lang.IllegalArgumentException - on null parameter
  - add
```
public static void add(Airport a)
```
    Add an airport to the airport registry
    
    Parameters:
    
    a - the airport to add
    
    Throws:
    
    java.lang.IllegalArgumentException - on null parameter
  - get
```
public static City get(CityId code)
```
    Get a city from the city registry
    
    Parameters:
    
    code - the city identifier
    
    Throws:
    
    java.lang.IllegalArgumentException - on null parameter
  - get
```
public static Airport get(AirportId id)
```
    Get a airport from the airport registry
    
    Parameters:
    
    id - the airport identifier
    
    Throws:
    
    java.lang.IllegalArgumentException - on null parameter
  - cities
```
public static java.util.Collection<City> cities()
```
    Get a collection of cityId
    
    Returns:
    
    a collection of city id
  - airports
```
public static java.util.Collection<Airport> airports()
```
    Get a collection of airportId
    
    Returns:
    
    a collection of airport id