private static void deliverMessage(IAdvertiser receiver, Message message)
{
if (!receiver.HandleMessage(message))
{
throw new Exception("NPC can't treat the message");
}
}
//**** client code that does not need to be changed ***
/*
* //LDAF007 - THE CORE
* Notice that regardless if you pass in BookStoreA or BookStoreB into the method above, this client code does
* not need to be changed since it will get the correct advertiser automatically using the internal logics
* within the factories. It is the factories (BookStoreA and BookStoreB) that determines which advertiser to produce.
* The same goes for choosing which book distributor to produce.
*
* The benefit of the Abstract Factory pattern is that it allows you to create a groups of products
* (the distributors and the advertisers) without having to know the actual class of the product being produced.
* The result is that you can have client code that does not need to be changed when the internal logic of
* the factories on which product to produce changed.
*/
public static void Advertise(IBookStore s)
{
//LDAF004
IAdvertiser a = s.GetAdvertiser();
a.Advertise();
}
public Message(Message other)
{
sender = other.sender;
receiver = other.receiver;
msg = (string)other.msg.Clone();
extraInfo = other.extraInfo;
}
public Message(IAdvertiser sender, IAdvertiser receiver, string msg, object extraInfo = null)
{
this.sender = sender;
this.receiver = receiver;
this.msg = msg;
this.extraInfo = extraInfo;
}
public IAdvertiser GetAdvertiser()
{
IAdvertiser advertiser = null;
switch (_location)
{
case CustomerLocation.EastCoast:
advertiser = new RedAdvertiser();
break;
case CustomerLocation.WestCoast:
advertiser = new BlueAdvertiser();
break;
default:
break;
}
return(advertiser);
}
public static void DispatchMessage(IAdvertiser sender, IAdvertiser receiver, string message, object extraInfo = null)
{
deliverMessage(receiver, new Message(sender, receiver, message, extraInfo));
}
private static void Advertise(IBookStore bookStore)
{
IAdvertiser obj = bookStore.GetAdvertiser();
obj.Advertise();
}
//**** client code that does not need to be changed ***
private static void Advertise(IBookStore s)
{
IAdvertiser a = s.GetAdvertiser();
a.Advertise();
}
