Re: Factory pattern for classes

[lexxn via Digitalmars-d-learn]

On Sunday, 9 August 2020 at 15:56:31 UTC, Ali Çehreli wrote:

On 8/9/20 7:27 AM, lexxn wrote:

module deneme;

import std.stdio;

interface I {
  void methodName();
}

class A : I {
  void methodName() {
    writeln("A");
  }
}

class B : I {
  void methodName() {
    writeln("B");
  }
}

class C : I {
  void methodName() {
    writeln("C");
  }
}

I getClassById(uint id)
{
    if (id == 0) {
        return cast(A)Object.factory("deneme.A");
    } else if(id == 1) {
        return cast(B)Object.factory("deneme.B");
    } else {
        return cast(C)Object.factory("deneme.C");
    }
}

void main() {
  auto o = getClassById(1);
  o.methodName();
}

Ali

This is the solution I will use, at least for now. Thank you Ali.