/// <summary>
/// Entry point
/// Creates car getter that takes file names from command line
/// Creates menu with list of car catalogs
/// </summary>
/// <param name="args">The command line arguments</param>
static void Main(string[] args)
{
try
{
// Checks for 2 file names
if (args.Length != 2)
{
throw new Exception("File names are not specified");
}
CarGetter carGetter = CarGetter.GetInstance();
List <CarCatalog> catalogs = new List <CarCatalog>()
{
new CarCatalog(carGetter.GetCars(args[(int)CarType.Passenger])),
new CarCatalog(carGetter.GetCars(args[(int)CarType.Truck]))
};
Menu menu = new Menu(catalogs);
menu.Display();
}
catch (Exception ex)
{
Console.WriteLine($"Error: {ex.Message}");
}
}
/// <summary>
/// Singleton pattern
/// Creates an object if it does not exist
/// </summary>
/// <returns>CarGetter object</returns>
public static CarGetter GetInstance()
{
if (_instance == null)
{
lock (_syncRoot)
{
if (_instance == null)
{
_instance = new CarGetter();
}
}
}
return(_instance);
}