public Employee2(string name, Employee2 boss = null)
{
this.Name = name;
this.Boss = boss;
if (this.Boss != null)
{
this.Boss.Subordinates.Add(this);
}
}
public void SetBoss(Employee2 employee) => Boss = employee;
public void RemoveSubordinate(Employee2 employee) => Subordinates.Remove(employee);
public void AddSubordinate(Employee2 employee) => Subordinates.Add(employee);
static void Advanced_1_RecursionWithCollections()
{
ConsoleTitle("SECTION: Recursion with Collections");
Employee e1 = new Employee("Big Cheese");
Employee e2 = new Employee("Monterey Jack", e1);
Employee e3 = new Employee("Cheddar", e1);
List <Employee> employees = new List <Employee>();
employees.Add(e1);
employees.Add(e2);
employees.Add(e3);
Console.WriteLine("\n Building JSON lists:");
try
{
string brokenJson = JsonConvert.SerializeObject(employees, Formatting.Indented);
}
catch (JsonSerializationException)
{
Console.WriteLine(" Error: (Version 1) Self referencing loop detected! Serialization failed.");
}
JsonSerializerSettings ignoreLoopSettings = new JsonSerializerSettings
{
ContractResolver = new PrivateSetResolver(),
ReferenceLoopHandling = ReferenceLoopHandling.Ignore
};
string faultyJson = JsonConvert.SerializeObject(employees, Formatting.Indented, settings: ignoreLoopSettings);
Console.WriteLine(" (Version 2) Ignore Loop, serialized but with lots of ugly repeating data");
DrawJson(faultyJson, "faultyJson"); // confirm its contents -- everything will repeat a lot -- bad
JsonSerializerSettings preserveReferenceSettings = new JsonSerializerSettings
{
ContractResolver = new PrivateSetResolver(),
PreserveReferencesHandling = PreserveReferencesHandling.Objects
};
string betterJson = JsonConvert.SerializeObject(employees, Formatting.Indented, settings: preserveReferenceSettings);
Console.WriteLine(" (Version 3) Objects Preserve References, serialized and clean");
DrawJson(betterJson, "betterJson"); // confirm its contents -- should look clean
List <Employee> faultyList = (List <Employee>)JsonConvert.DeserializeObject <List <Employee> >(faultyJson, settings: preserveReferenceSettings);
Employee ne1a = faultyList[0];
Employee ne2a = faultyList[1];
Employee ne3a = faultyList[2];
List <Employee> betterList1 = (List <Employee>)JsonConvert.DeserializeObject <List <Employee> >(betterJson, settings: preserveReferenceSettings);
Employee ne1b = betterList1[0];
Employee ne2b = betterList1[1];
Employee ne3b = betterList1[2];
List <Employee2> betterList2 = (List <Employee2>)JsonConvert.DeserializeObject <List <Employee2> >(faultyJson, settings: preserveReferenceSettings);
Employee2 ne1c = betterList2[0];
Employee2 ne2c = betterList2[1];
Employee2 ne3c = betterList2[2];
List <Employee2> bestList = (List <Employee2>)JsonConvert.DeserializeObject <List <Employee2> >(betterJson, settings: preserveReferenceSettings);
Employee2 ne1d = bestList[0];
Employee2 ne2d = bestList[1];
Employee2 ne3d = bestList[2];
Console.WriteLine("\n Original Data:");
employees.ForEach(e => Console.WriteLine($" {e}"));
/*
* // These all appear the same, but they're not!
* Console.WriteLine(" Data v1:");
* faultyList.ForEach(e => Console.WriteLine($" {e}"));
* Console.WriteLine(" Data v2:");
* betterList1.ForEach(e => Console.WriteLine($" {e}"));
* Console.WriteLine(" Data v3:");
* betterList2.ForEach(e => Console.WriteLine($" {e}"));
* Console.WriteLine(" Data v4:");
* bestList.ForEach(e => Console.WriteLine($" {e}"));
*/
Console.WriteLine("\n Expected Test Results:");
AreTheseEqual(e1, e2.Boss);
AreTheseEqual(e1.Subordinates[0], e2);
AreTheseEqual(e1, e3.Boss);
AreTheseEqual(e1.Subordinates[1], e3);
Console.WriteLine(" Data v1 Tests (built from redundant collections):");
AreTheseEqual(ne1a, ne2a.Boss);
AreTheseEqual(ne1a.Subordinates[0], ne2a);
AreTheseEqual(ne1a, ne3a.Boss);
AreTheseEqual(ne1a.Subordinates[1], ne3a);
Console.WriteLine(" Data v2 Tests (built from superior collection, but no default constructor):");
AreTheseEqual(ne1b, ne2b.Boss);
AreTheseEqual(ne1b.Subordinates[0], ne2b);
AreTheseEqual(ne1b, ne3b.Boss);
AreTheseEqual(ne1b.Subordinates[1], ne3b);
Console.WriteLine(" Data v3 Tests (built from worse json, but with default constructor):");
AreTheseEqual(ne1c, ne2c.Boss);
AreTheseEqual(ne1c.Subordinates[0], ne2c);
AreTheseEqual(ne1c, ne3c.Boss);
AreTheseEqual(ne1c.Subordinates[1], ne3c);
Console.WriteLine(" Data v4 Tests (built from sperior json, with default constructor):");
AreTheseEqual(ne1d, ne2d.Boss);
AreTheseEqual(ne1d.Subordinates[0], ne2d);
AreTheseEqual(ne1d, ne3d.Boss);
AreTheseEqual(ne1d.Subordinates[1], ne3d);
}