Convert Path String to Object Path in Swift

Question


struct Student{
  var rollNum : Int
  var name : String
  var contact : Contact
}
struct Contact{
  var phoneNum : String
  var mailId : String
}

let contact = Contact(phoneNum : "1234567890", mailId : "[email protected]") 
let student = Student(rollNum : 1, name : "John", contact : contact)

Here, the path for mail Id is given as a String "Student/contact/mailId". How to convert this to Object Path as Student.contact.mailId?

Assume the label wants to display the mail ID, I would give the path string as "Student/contact/mailId" and the label should display the mail id as [email protected]

What exactly is an "Object Path"? Do you mean a KeyPath or something else? — Joakim Danielson
– Joakim Danielson, Commented Feb 22, 2022 at 9:57
` let contact = Contact(phoneNum : "1234567890", mailId : "[email protected]") let student = Student(rollNum : 1, name : "John", contact : contact) ` Consider a label and it's text is given by this object path (i.e) Assume the label wants to display the mail ID, I would give the path string as "Student/contact/mailId" and the label should display the mail id as [email protected] @joakim-danielson — Lakshmi C
– Lakshmi C, Commented Feb 22, 2022 at 10:39
@JoakimDanielson Thanks!! Added further info...Kindly let me know if u get the solution — Lakshmi C
– Lakshmi C, Commented Feb 22, 2022 at 13:25
What are you trying to achieve here? Why would you access the mailId via ' path ' instead of accessing via object chain? — Heshan Sandeepa
– Heshan Sandeepa, Commented Feb 22, 2022 at 13:28

Kashem · Accepted Answer · 2022-02-22 18:06:22Z

1

There can be many solutions to your problem. I think my solution could give an idea of how can you solve this problem.

struct Student {
    var rollNum: Int
    var name: String
    var contact: Contact
}

struct Contact {
    var phoneNum: String
    var mailId: String
}

func studentInformation(student: Student, paths: [String]) {
    print("Student name: \(student.name), RollNumber: \(student.rollNum)")
    if paths[0] == "\(Contact.self)" {
        contactInformation(contact: student.contact, path: paths[1])
    }
}

func contactInformation(contact: Contact, path: String) {
    print("Contact phonenumber: \(contact.phoneNum), mailId: \(contact.mailId)")
    let contactVariableNameWithValue = Mirror(reflecting: contact).children
    for variableName in contactVariableNameWithValue {
        if variableName.label == path {
            print(variableName.value)
            break
        }
    }
}

let contact = Contact(phoneNum: "1234567890", mailId: "[email protected]")
let student = Student(rollNum: 1, name: "John", contact: contact)
var pathString = "Student/Contact/mailId"
public let pathComponents = pathString.components(separatedBy: "/")
studentInformation(student: student, paths: Array(pathComponents.suffix(from: 1)))

answered Feb 22, 2022 at 18:06

Kashem

1251 silver badge11 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Lakshmi C Over a year ago

Thanks @md-abul-kashem , It greatly helped me to solve my problem

Kashem Over a year ago

@LakshmiC Follow How to say thanks in SO

Lakshmi C · Accepted Answer · 2022-02-28 12:08:48Z

0

struct Student {
    var rollNum: String
    var name: String
    var contact: Contact
}
struct Contact {
    var phoneNum: String
    var mailId: MailId
}
struct MailId {
    var official : String
    var personal : String
}
let pathString = "Student/contact/mailId/personal"
let pathComponents = pathString.components(separatedBy: "/")
var index : Int = 1

let contact = Contact(phoneNum: "9988998899", mailId: MailId(official: "[email protected]", personal: "[email protected]"))
let student = Student(rollNum: "123", name: "John", contact: contact)



Reflection(from: student , pathComponents: pathComponents)
func Reflection(from object : Any, pathComponents : [String]) {
    let properties = Mirror(reflecting: object)
    for property in properties.children{
        if index < pathComponents.count{
            if property.label == pathComponents[index] {
                index += 1
                print(property.value , "got here with label :" , property.label)
                Reflection(from: property.value, pathComponents: pathComponents)
                
            }
        }
    }
}

Here, we can get the value as [email protected]

answered Feb 28, 2022 at 12:08

Lakshmi C

299 bronze badges

1 Comment

Community Over a year ago

Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.

Collectives™ on Stack Overflow

Convert Path String to Object Path in Swift

2 Answers 2

2 Comments

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related