public SpamChecker()
{
firstSpamHandler = new DollarSignSpamHandler();
var secondHandler = new EmptyTextSpamHandler();
var endOfChainHandler = new EndOfChainSpamHandler();
firstSpamHandler.RegisterNext(secondHandler);
secondHandler.RegisterNext(endOfChainHandler);
}
public void RegisterNext(SpamHandler next)
{
NextSpamHandler = next;
}