private static void EmployeesDemo()
{
var ivan = new Clerk {
Name = "Ivan", Income = 20000, VacationDays = 8
};
var peter = new Clerk {
Name = "Peter", Income = 25000, VacationDays = 14
};
var george = new Director {
Name = "George", Income = 35000, VacationDays = 16
};
var bob = new President {
Name = "Bob", Income = 45000, VacationDays = 21
};
// Setup employee collection
var employees = new EmployeesList();
employees.Attach(ivan);
employees.Attach(peter);
employees.Attach(george);
employees.Attach(bob);
// Employees are 'visited'
employees.Accept(new IncomeVisitor());
employees.Accept(new VacationVisitor());
bob.Accept(new IncomeVisitor());
// We can create and apply new visitors (e.g. work from home days)
// as well as new employee successors
// We can create SumIncomeVisitor to collect information for us
}