Simple Factory - Creational Design Pattern

🏠 Simple Factory

Simple factory simply generates an instance for client without exposing any instantiation logic to the client

Example:

interface Door {
    public function getWidth(): float;
    public function getHeight(): float;
} 
class WoodenDoor implements Door {
    protected int width;
    protected int height;
    public int getWidth() {
        return width;
    }
    public int getHeight() {
        return height;
    }
    public WoodenDoor(int width, int height){
        this.width = width;
        this.height = height;
    }
}
class DoorFactory {
    public static function makeDoor(width, height): Door
    {
        return new WoodenDoor(width, height);
    }
}

When to Use? When creating an object is not just a few assignments and involves some logic, it makes sense to put it in a dedicated factory instead of repeating the same code everywhere.