static void Intermediate_4_CircularRecursion()
{
ConsoleTitle("SECTION: Circular Recursion");
PersonV4 p1 = new PersonV4("Bob");
PersonV4 p2 = new PersonV4("Janet", p1);
p1.SetParent(p2);
PersonV4 p3 = new PersonV4("Suzette", partner: p2);
List <PersonV4> pList1 = new List <PersonV4> {
p1, p2, p3
};
JsonSerializerSettings settings1 = new JsonSerializerSettings
{
ContractResolver = new PrivateSetResolver(),
PreserveReferencesHandling = PreserveReferencesHandling.Objects
};
string json1 = JsonConvert.SerializeObject(pList1, Formatting.Indented, settings: settings1);
List <PersonV4> pList2 = JsonConvert.DeserializeObject <List <PersonV4> >(json1, settings: settings1);
PersonV4 np1a = pList2[0];
PersonV4 np2a = pList2[1];
PersonV4 np3a = pList2[2];
List <PersonV4b> pList3 = JsonConvert.DeserializeObject <List <PersonV4b> >(json1, settings: settings1);
PersonV4b np1b = pList3[0];
PersonV4b np2b = pList3[1];
PersonV4b np3b = pList3[2];
DrawJson(json1, "json1");
Console.WriteLine("\n Initial Data:");
pList1.ForEach(p => Console.WriteLine($" -> {p}"));
Console.WriteLine(" Deserialized Data v1:");
pList2.ForEach(p => Console.WriteLine($" -> {p}"));
Console.WriteLine(" Deserialized Data v2:");
pList3.ForEach(p => Console.WriteLine($" -> {p}"));
Console.WriteLine("\n Expected Answers (pre-serialization):");
AreTheseEqual(p1, p2.Parent);
AreTheseEqual(p2, p3.Partner);
AreTheseEqual(p2, p1.Parent);
Console.WriteLine(" Actual Answers (post-serialization) (expect errors):");
AreTheseEqual(np1a, np2a.Parent);
AreTheseEqual(np2a, np3a.Partner);
AreTheseEqual(np2a, np1a.Parent);
Console.WriteLine(" Desired Answers (post-serialization) -- w/ empty default constructor:");
AreTheseEqual(np1b, np2b.Parent);
AreTheseEqual(np2b, np3b.Partner);
AreTheseEqual(np2b, np1b.Parent);
}
public void SetPartner(PersonV4 partner) => this.Parent = partner;
public void SetParent(PersonV4 parent) => this.Parent = parent;
public PersonV4(string name, PersonV4 parent = null, PersonV4 partner = null)
{
this.Name = name;
this.Parent = parent;
this.Partner = partner;
}