public static void ChainOfResponsibility()
{
//Create the chain links
Approver jennifer = new HeadChef();
Approver mitchell = new PurchasingManager();
Approver olivia = new GeneralManager();
//Create the chain
jennifer.SetSupervisor(mitchell);
mitchell.SetSupervisor(olivia);
// Generate and process purchase requests
PurchaseOrder p = new PurchaseOrder(1, 20, 69, "Spices");
jennifer.ProcessRequest(p);
p = new PurchaseOrder(2, 300, 1389, "Fresh Veggies");
jennifer.ProcessRequest(p);
p = new PurchaseOrder(3, 500, 4823.99, "Beef");
jennifer.ProcessRequest(p);
p = new PurchaseOrder(4, 4, 12099, "Ovens");
jennifer.ProcessRequest(p);
}
static void Client()
{
Approver jordan = new GeneralManager(null);
Approver haley = new PurchasingManager(jordan);
Approver betsy = new HeadChef(haley);
PurchaseOrder po1 = new PurchaseOrder("Spices", 20, 3.50m);
betsy.ProcessRequest(po1);
Console.WriteLine(po1);
PurchaseOrder po2 = new PurchaseOrder("Fresh Veggies", 300, 8);
betsy.ProcessRequest(po2);
Console.WriteLine(po2);
PurchaseOrder po3 = new PurchaseOrder("Beef", 500, 9.23m);
betsy.ProcessRequest(po3);
Console.WriteLine(po3);
PurchaseOrder po4 = new PurchaseOrder("Ovens", 5, 5000.21m);
try
{
betsy.ProcessRequest(po4);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine(po4);
}
}
static void Main(string[] args)
{
//Create the chain links
Approver jennifer = new HeadChef();
Approver mitchell = new PurchasingManager();
Approver olivia = new GeneralManager();
//Create the chain
jennifer.SetSupervisor(mitchell);
mitchell.SetSupervisor(olivia);
// Generate and process purchase requests
PurchaseOrder p = new PurchaseOrder(1, 20, 69, "Spices");
jennifer.ProcessRequest(p);
p = new PurchaseOrder(2, 300, 1389, "Fresh Veggies");
jennifer.ProcessRequest(p);
p = new PurchaseOrder(3, 500, 4823.99, "Beef");
jennifer.ProcessRequest(p);
p = new PurchaseOrder(4, 4, 12099, "Ovens");
jennifer.ProcessRequest(p);
// Wait for user
Console.ReadKey();
}
static void Main(string[] args)
{
#region Publication
// Create a list of books to be published, including cover type and publication cost.
var books = new List <Book> {
new Book("The Stand", "Stephen King", CoverType.Paperback, 35000),
new Book("The Hobbit", "J.R.R. Tolkien", CoverType.Paperback, 25000),
new Book("The Name of the Wind", "Patrick Rothfuss", CoverType.Digital, 7500),
new Book("To Kill a Mockingbird", "Harper Lee", CoverType.Hard, 65000),
new Book("1984", "George Orwell", CoverType.Paperback, 22500),
new Book("Jane Eyre", "Charlotte Brontë", CoverType.Hard, 82750)
};
// Create specifications for individual cover types.
var digitalCoverSpec = new Specification <Book>(book => book.CoverType == CoverType.Digital);
var hardCoverSpec = new Specification <Book>(book => book.CoverType == CoverType.Hard);
var paperbackCoverSpec = new Specification <Book>(book => book.CoverType == CoverType.Paperback);
// Create budget spec for cost exceeding $75000.
var extremeBudgetSpec = new Specification <Book>(book => book.PublicationCost >= 75000);
// Create budget spec for cost between $50000 and $75000.
var highBudgetSpec = new Specification <Book>(book => book.PublicationCost >= 50000 && book.PublicationCost < 75000);
// Create budget spec for cost between $25000 and $50000.
var mediumBudgetSpec = new Specification <Book>(book => book.PublicationCost >= 25000 && book.PublicationCost < 50000);
// Create budget spec for cost below $25000.
var lowBudgetSpec = new Specification <Book>(book => book.PublicationCost < 25000);
// Default spec, always returns true.
var defaultSpec = new Specification <Book>(book => true);
// Create publication process instance, used to pass Action<T> to Employee instances.
var publicationProcess = new PublicationProcess();
// Create employees with various positions.
var ceo = new Employee <Book>("Alice", Position.CEO, publicationProcess.PublishBook);
var president = new Employee <Book>("Bob", Position.President, publicationProcess.PublishBook);
var cfo = new Employee <Book>("Christine", Position.CFO, publicationProcess.PublishBook);
var director = new Employee <Book>("Dave", Position.DirectorOfPublishing, publicationProcess.PublishBook);
// Default employee, used as successor of CEO and to handle unpublishable books.
var defaultEmployee = new Employee <Book>("INVALID", Position.Default, publicationProcess.FailedPublication);
// Director can handle digital low budget only.
director.SetSpecification(digitalCoverSpec.And(lowBudgetSpec));
// CFO can handle digital/paperbacks that are medium or high budget.
cfo.SetSpecification(digitalCoverSpec.Or(paperbackCoverSpec).And(mediumBudgetSpec.Or(highBudgetSpec)));
// President can handle all medium/high budget.
president.SetSpecification(mediumBudgetSpec.Or(highBudgetSpec));
// CEO can handle all extreme budget.
ceo.SetSpecification(extremeBudgetSpec);
// Default employee can handle only default specification (all).
defaultEmployee.SetSpecification(defaultSpec);
// Set chain of responsibility: CEO > President > CFO > Director.
director.SetSuccessor(cfo);
cfo.SetSuccessor(president);
president.SetSuccessor(ceo);
ceo.SetSuccessor(defaultEmployee);
// Loop through books, trying to publish, starting at bottom of chain of responsibility (Director).
books.ForEach(book => director.PublishBook(book));
#endregion
// TODO => Add specification pattern here.
#region Restaurant
//Create the chain links
Approver jennifer = new HeadChef();
Approver mitchell = new PurchasingManager();
Approver olivia = new GeneralManager();
//Create the chain
jennifer.SetSupervisor(mitchell);
mitchell.SetSupervisor(olivia);
// Generate and process purchase requests
PurchaseOrder p = new PurchaseOrder(1, 20, 69, "Spices");
jennifer.ProcessRequest(p);
p = new PurchaseOrder(2, 300, 1389, "Fresh Veggies");
jennifer.ProcessRequest(p);
p = new PurchaseOrder(3, 500, 4823.99, "Beef");
jennifer.ProcessRequest(p);
p = new PurchaseOrder(4, 4, 12099, "Ovens");
jennifer.ProcessRequest(p);
#endregion
// Wait for user
Console.ReadKey();
}
