static void Main(string[] args)
{
// Represent an operation to be performed on the elements of an object structure.
// Visitor lets you define a new operation without changing the classes of the elements on which it operates.
var person = new Person();
person.Assets.Add(new BankAccount {
Amount = 1000, MonthlyInterest = 0.01
});
person.Assets.Add(new BankAccount {
Amount = 2000, MonthlyInterest = 0.02
});
person.Assets.Add(new RealEstate {
EstimatedValue = 79000, MonthlyRent = 500
});
person.Assets.Add(new Loan {
Owed = 40000, MonthlyPayment = 40
});
var networth = new NetworthVisitor();
person.Accept(networth);
Console.WriteLine($"Networth: ${networth.Total}");
var monthlyIncome = new MonthlyIncomeVisitor();
person.Accept(monthlyIncome);
Console.WriteLine($"Monthly income: ${monthlyIncome.Total}");
Console.ReadKey();
}
public void VisitorPatter_TestUseOfVisitor()
{
var person = new Person();
person.Assets.Add(new BankAccount {
Amount = 1000, MonthlyInterest = 0.01
});
person.Assets.Add(new BankAccount {
Amount = 2000, MonthlyInterest = 0.02
});
person.Assets.Add(new RealEstate {
EstimatedValue = 79000, MonthlyRent = 500
});
person.Assets.Add(new Loan {
Owed = 40000, MonthlyPayment = 40
});
var netWorthVisitor = new NetWorthVisitor();
var incomeVisitor = new IncomeVisitor();
person.Accept(netWorthVisitor);
person.Accept(incomeVisitor);
Console.WriteLine(netWorthVisitor.Total);
Console.WriteLine(incomeVisitor.Amount);
}
public int CalcNetWorth()
{
var networthVisitor = new NetWorthVisior();
_person.Accept(networthVisitor);
return(networthVisitor.Total);
}
public Beer ServeAnyBeerTo(Person person)
{
Beer beer = beerInventory.Last();
person.Accept(beer);
return(beer);
}
private static void NetWorthDemo()
{
var person = new Person();
person.Assets.Add(new BankAccount { Amount = 10000, MonthlyInterest = 0.005M });
person.Assets.Add(new BankAccount { Amount = 1000, MonthlyInterest = 0.01M });
person.Assets.Add(new RealEstate { EstimatedValue = 100000, MonthlyRent = 500 });
person.Assets.Add(new Loan { Owed = 30000, MonthlyPayment = 300 });
var netWorthVisitor = new NetWorthVisitor();
person.Accept(netWorthVisitor);
Console.WriteLine("Total value of assets: {0}", netWorthVisitor.Total);
var monthlyIncomeVisitor = new MonthlyIncomeVisitor();
person.Accept(monthlyIncomeVisitor);
Console.WriteLine("Total monthly income: {0}", monthlyIncomeVisitor.Total);
}
public override void Run()
{
var bank = new Bank();
var person1 = new Person("Person_1", 20);
var company1 = new Company("Company_1", "123456", 1990);
var person2 = new Person("Person_2", 30);
var xmlVisitor = new XmlVisitor();
var htmlVisitor = new HtmlVisitor();
bank.AddAccount(person1);
bank.AddAccount(company1);
bank.Accept(xmlVisitor);
bank.Accept(htmlVisitor);
person2.Accept(xmlVisitor);
person2.Accept(htmlVisitor);
}
public void Calculate_Monthly_Income()
{
var person = new Person();
person.Assets.Add(new BankAccount {
Amount = 1000, InterestRate = 0.05m
});
person.Assets.Add(new BankAccount {
Amount = 2000, InterestRate = 0.1m
});
person.Assets.Add(new RealEstate {
EstimatedValue = 79000, MonthlyRent = 2000
});
person.Assets.Add(new Loan {
Owed = 40000, MonthlyPayment = 100
});
var incomeVisitor = new MonthlyIncomeVisitor();
person.Accept(incomeVisitor);
Assert.Equal(1920.84m, incomeVisitor.Amount);
}
public void Calculate_Net_Worth()
{
var person = new Person();
person.Assets.Add(new BankAccount {
Amount = 1000, InterestRate = 0.05m
});
person.Assets.Add(new BankAccount {
Amount = 2000, InterestRate = 0.1m
});
person.Assets.Add(new RealEstate {
EstimatedValue = 79000, MonthlyRent = 2000
});
person.Assets.Add(new Loan {
Owed = 40000, MonthlyPayment = 100
});
var netWorthVisitor = new NetWorthVisitor();
person.Accept(netWorthVisitor);
Assert.Equal(42000, netWorthVisitor.Total);
}
public Beer ServeBeerTo(Beer beer, Person person)
{
person.Accept(beer);
return(beer);
}
public TVal GetValue(Person p)
{
_val = default(TVal);
p.Accept(this);
return(_val);
}
