134 lines
3.3 KiB
Java
Executable File
134 lines
3.3 KiB
Java
Executable File
/**
|
|
* Capture outline details of a vehicle.
|
|
*
|
|
* @author David J. Barnes and Michael Kölling
|
|
* @version 2016.02.29
|
|
*/
|
|
public abstract class Vehicle
|
|
{
|
|
private TaxiCompany company;
|
|
// Where the vehicle is.
|
|
private Location location;
|
|
// Where the vehicle is headed.
|
|
private Location targetLocation;
|
|
|
|
/**
|
|
* Constructor of class Vehicle
|
|
* @param company The taxi company. Must not be null.
|
|
* @param location The vehicle's starting point. Must not be null.
|
|
* @throws NullPointerException If company or location is null.
|
|
*/
|
|
public Vehicle(TaxiCompany company, Location location)
|
|
{
|
|
if(company == null) {
|
|
throw new NullPointerException("company");
|
|
}
|
|
if(location == null) {
|
|
throw new NullPointerException("location");
|
|
}
|
|
this.company = company;
|
|
this.location = location;
|
|
targetLocation = null;
|
|
}
|
|
|
|
/**
|
|
* Notify the company of our arrival at a pickup location.
|
|
*/
|
|
public void notifyPickupArrival()
|
|
{
|
|
company.arrivedAtPickup(this);
|
|
}
|
|
|
|
/**
|
|
* Notify the company of our arrival at a
|
|
* passenger's destination.
|
|
* @param passenger The passenger who has arrived.
|
|
*/
|
|
public void notifyPassengerArrival(Passenger passenger)
|
|
{
|
|
company.arrivedAtDestination(this, passenger);
|
|
}
|
|
|
|
/**
|
|
* Receive a pickup location.
|
|
* How this is handled depends on the type of vehicle.
|
|
* @param location The pickup location.
|
|
*/
|
|
public abstract void setPickupLocation(Location location);
|
|
|
|
/**
|
|
* Receive a passenger.
|
|
* How this is handled depends on the type of vehicle.
|
|
* @param passenger The passenger being picked up.
|
|
*/
|
|
public abstract void pickup(Passenger passenger);
|
|
|
|
/**
|
|
* @return Whether or not this vehicle is free.
|
|
*/
|
|
public abstract boolean isFree();
|
|
|
|
/**
|
|
* Offload any passengers whose destination is the
|
|
* current location.
|
|
*/
|
|
public abstract void offloadPassenger();
|
|
|
|
/**
|
|
* Get the location.
|
|
* @return Where this vehicle is currently located.
|
|
*/
|
|
public Location getLocation()
|
|
{
|
|
return location;
|
|
}
|
|
|
|
/**
|
|
* Set the current location.
|
|
* @param location Where it is. Must not be null.
|
|
* @throws NullPointerException If location is null.
|
|
*/
|
|
public void setLocation(Location location)
|
|
{
|
|
if(location != null) {
|
|
this.location = location;
|
|
}
|
|
else {
|
|
throw new NullPointerException();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the target location.
|
|
* @return Where this vehicle is currently headed, or null
|
|
* if it is idle.
|
|
*/
|
|
public Location getTargetLocation()
|
|
{
|
|
return targetLocation;
|
|
}
|
|
|
|
/**
|
|
* Set the required target location.
|
|
* @param location Where to go. Must not be null.
|
|
* @throws NullPointerException If location is null.
|
|
*/
|
|
public void setTargetLocation(Location location)
|
|
{
|
|
if(location != null) {
|
|
targetLocation = location;
|
|
}
|
|
else {
|
|
throw new NullPointerException();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Clear the target location.
|
|
*/
|
|
public void clearTargetLocation()
|
|
{
|
|
targetLocation = null;
|
|
}
|
|
}
|