aim4.vehicle

Class VehicleSpecDatabase

java.lang.Object

aim4.vehicle.VehicleSpecDatabase

public class VehicleSpecDatabase
extends Object

The vehicle specification database.

Method Summary

Methods

Modifier and Type	Method and Description
static int	getIdByName(String name) Get the id of the vehicle specification.
static int	getIdOfVehicleSpec(VehicleSpec spec) Get the id of the vehicle specification.
static int	getNumOfSpec() Get the total number of vehicle specifications in the database
static VehicleSpec	getVehicleSpecById(int id) Get the vehicle specification.
static VehicleSpec	getVehicleSpecByName(String name) Get the vehicle specification.
static void	registerSpec(VehicleSpec spec) Register a vehicle specification.
static boolean	replaceSpec(VehicleSpec spec) Place an registered vehicle spec with a new one.

Methods inherited from class java.lang.Object

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

Method Detail

getNumOfSpec

public static int getNumOfSpec()

Get the total number of vehicle specifications in the database

Returns:

the total number of vehicle specifications.

registerSpec

public static void registerSpec(VehicleSpec spec)

Register a vehicle specification. It requires that the name of the given vehicle specification is not the same as the name of any registered vehicle specifications.

Parameters:

spec - the vehicle specification

replaceSpec

public static boolean replaceSpec(VehicleSpec spec)

Place an registered vehicle spec with a new one.

Parameters:

spec - the new spec

Returns:

true if there exists a spec whose name is the same as the new one; false if otherwise.

getIdOfVehicleSpec

public static int getIdOfVehicleSpec(VehicleSpec spec)

Get the id of the vehicle specification. It returns < 0 if the vehicle specification has not been registered.

Parameters:

spec - the vehicle specification

Returns:

the id of vehicle specification; -1 if the vehicle specification has not been registered.

getIdByName

public static int getIdByName(String name)

Get the id of the vehicle specification. It returns < 0 if the vehicle specification has not been registered.

Parameters:

name - the name of the vehicle specification

Returns:

the id of vehicle specification; -1 if the vehicle specification has not been registered.

getVehicleSpecById

public static VehicleSpec getVehicleSpecById(int id)

Get the vehicle specification. It returns null if the vehicle specification id does not exist.

Parameters:

id - the id of the vehicle specification

Returns:

the vehicle specification; null if the vehicle specification id does not exist.

getVehicleSpecByName

public static VehicleSpec getVehicleSpecByName(String name)

Get the vehicle specification. It returns null if the vehicle specification id does not exist.

Parameters:

name - the name of the vehicle specification

Returns:

the vehicle specification; null if the vehicle specification id does not exist.