/// <summary>
/// SingleTone pattern, only one object of class can exist
/// </summary>
public static CarShop GetInstance(string carsXmlFileName, string brandsXmlFileName)
{
if (Instance == null)
{
Instance = new CarShop(carsXmlFileName, brandsXmlFileName);
}
return(Instance);
}
static void Main(string[] args)
{
string carsXmlFileName = "Cars";
string brandsXmlFileName = "Brands";
CarShop myShop = CarShop.GetInstance(carsXmlFileName, brandsXmlFileName);
CarShopCommandDefiner commandDefiner = new CarShopCommandDefiner(myShop);
Invoker invoker = new Invoker();
string commandName = string.Empty;
Console.WriteLine("Hello! You can write \"help\" to check all commands or \"exit\" to exit the program.");
while (true)
{
Console.Write("\nWrite command: ");
commandName = Console.ReadLine();
if (commandName == "exit")
{
Console.WriteLine("Programm was completed by your command");
break;
}
else if (commandName == "help")
{
Console.WriteLine("Command list: add car; remove car <serial number>; count all;");
Console.WriteLine("count types; average price type <brand name>; average price; exit");
}
else
{
try
{
ICommand command = commandDefiner.DefineCommand(commandName);
invoker.SetCommand(command);
invoker.ExecuteCommand();
}
catch (ArgumentException e)
{
Console.WriteLine(e.Message);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
}
/// <summary>
/// This class can define inputed commands for Car shop
/// </summary>
public CarShopCommandDefiner(CarShop receiver)
{
this.Receiver = receiver;
}