Json to Object deeply - json

Question

In my TypeScript code I have 2 classes ClassA and ClassB:
export class ClassA {
name: string;
classB: ClassB;
getName(): string {
return this.name;
}
}
export class ClassB {
name: string;
getName(): string {
return this.name;
}
}
I try to parse a Json into a ClassA instance like this:
let classA: ClassA = Object.assign(new ClassA(), JSON.parse('{"name":"classA", "classB": {"name":"classB"}}'));
But only ClassA is instanciated, inside classB attribute is not.
I have the following result when I log objects:
console.log(classA); // ClassA {name: "classA", classB: Object}
console.log(classA.getName()); // classA
console.log(classA.classB); // Object {name: "classB"}
console.log(classA.classB.getName()); // EXCEPTION: classA.classB.getName is not a function
Is that possible to deeply parse a Json?

Answer 1

You'll need to do something like this:
export interface ClassBData {
name: string;
}
export interface ClassAData {
name: string;
classB: ClassBData;
}
export class ClassA {
name: string;
classB: ClassB;
constructor(json: ClassAData) {
this.name = json.name;
this.classB = Object.assign(new ClassB(), json.classB);
}
getName(): string {
return this.name;
}
}
Or you can instantiate ClassB the same way:
export class ClassB {
name: string;
constructor(json: ClassBData) {
this.name = json.name;
}
getName(): string {
return this.name;
}
}

Answer 2

So far, the best way I found is to do:
export class ClassA {
name: string;
classB: ClassB;
constructor(json: any) {
this.name = json.name;
if (json.classB !== undefined && json.classB !== null) {
this.classB = new ClassB(json.classB);
}
}
}
export class ClassB {
name: string;
constructor(json: any) {
this.name = json.name;
}
}