Untitled

public class OrderService {
    private Database database;
    public OrderService() {
        this.database = new Database();
    }
    public void placeOrder(String customerId, String productId, int quantity) {
        if (customerId == null || productId == null || quantity <= 0) {
            System.out.println("Invalid order details");
            return;
        }
        Customer customer = database.findCustomerById(customerId);
        if (customer == null) {
            System.out.println("Customer not found");
            return;
        }
        Product product = database.findProductById(productId);
        if (product == null || product.getStock() < quantity) {
            System.out.println("Product not available");
            return;
        }
        Order order = new Order(customer, product, quantity);
        database.saveOrder(order);
        product.setStock(product.getStock() - quantity);
        database.updateProduct(product);
        System.out.println("Order placed successfully");
    }
}