Implementing Factory Pattern with reflection

I am implementing factory pattern Here is my factory class:

class ProductFactory
{
    private HashMap m_RegisteredProducts = new HashMap();

    public void registerProduct (String productID, Class productClass)
    {
        m_RegisteredProducts.put(productID, productClass);
    }

    public Product createProduct(String productID)
    {
        Class productClass = (Class)m_RegisteredProducts.get(productID);
        Constructor productConstructor = cClass.getDeclaredConstructor(new Class[] { String.class });
        return (Product)productConstructor.newInstance(new Object[] { });
    }
}

and here is my concrete class:

class OneProduct extends Product
{
    static {
        Factory.instance().registerProduct("ID1",OneProduct.class);
    }
    ...
}

My Question:

1. how do I enforce all the concrete implementations to register an ID along with their class object? - Because if the class doesn't register itself like this in the factory then it cant be used.

2. Can't I use an abstract class which requires somehow all its child to send its name and id to the parent, enforcing this constraint? Something like this:

   public abstract class Product {
   
       public Product(String name, Class productClass){
   
   
       }
   }
   
   

Am I missing anything here?