bind abstract class service in provider laravel - laravel

Question

Gives an error:
Target [MyVendor\ProductList\ProductServiceInterface] is not instantiable.
ProductServiceInterface
namespace MyVendor\ProductList;
interface ProductServiceInterface
{
public function productList();
public function getProductSpeed();
}
ProductColorService
namespace MyVendor\ProductList\Service;
abstract class ProductColorService implements \MyVendor\ProductList\ProductServiceInterface
{
public function productList()
{
$color = "black";
return $color;
}
}
** ProductSpeedService **
namespace MyVendor\ProductList\Service;
abstract class ProductSpeedService implements \MyVendor\ProductList\ProductServiceInterface {
public function getProductSpeed() {
$speed = 200;
return $speed;
}
}
Provider :
namespace MyVendor\ProductList;
use Illuminate\Support\ServiceProvider;
use MyVendor\ProductList\ProductServiceInterface;
use MyVendor\ProductList\Service\ProductColorService;
class ProductColorServiceProvider extends ServiceProvider
{
public function boot()
{
$this->loadRoutesFrom(__DIR__ . '/routes/color.php');
}
public function register()
{
$this->app->bind('MyVendor\ProductList\ProductServiceInterface','MyVendor\ProductList\Service\ProductColorService');
$this->app->bind('MyVendor\ProductList\ProductServiceInterface','MyVendor\ProductList\Service\ProductSpeedService');
}
}
Whats wrong in this code? Actually I need to override some functions in interface using service. ie each service should override one method.
namespace MyVendor\ProductList\Http\Controllers;
use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use MyVendor\ProductList\Models\Product;
use MyVendor\ProductList\ProductServiceInterface;
class ProductListController extends Controller
{
public function index(ProductServiceInterface $product_service)
{
$color = $product_service->productList();
$speed = $product_service->getProductSpeed();
dd($color," = ",$speed);
$product = Product::get();
return view('ProductList::product',compact('product'));
}
}
here productList() in one service and productSpeed() from another service

Answer 1

You can't instantiate abstract classes. The whole point of them is there can never be an instance of them, so if you bind your interface to your abstract class with a method, it simply can never be abstract. Abstract is for classes in inheritance structures you do not want to have the users to create new ones.
So there is no reason for the abstract, abstract is for something like this.
abstract class Vehicle {
protected $wheels;
public function getWheels() {
return $this->wheels;
}
}
class Car extends Vehicle {
protected $wheels = 4;
}
class Bike extends Vehicle {
protected $wheels = 2;
}
You can not make a vehicle as it is not a concrete implementation, as it is a parent class to help with methods shared across two classes. So short version, just remove the abstract keyword. If you don't know why you add it, it is not needed.