Chigazo Lesson 14 Ecommerce System

lesson_14/exceptions/exceptions_app/src/main/java/com/codedifferently/lesson14/ecommerce/EcommerceSystem.java

@@ -17,19 +17,31 @@ public void addProduct(String productId, String name) {
     products.put(productId, new Product(productId, name));
   }
 
-  public String placeOrder(String productId, int quantity) {
+  public String placeOrder(String productId, int quantity) throws ProductNotFoundException {
     Product product = products.get(productId);
     String orderId = UUID.randomUUID().toString();
     orders.put(orderId, new Order(orderId, product, quantity));
+    // Asks if product is null and to throw the exception message 'Product with ID {orderId} not
+    // found' if it is.
+    if (product == null) {
+      throw new ProductNotFoundException("Product with ID " + productId + " not found");
+    }
+    //
     return orderId;
   }
 
   public void cancelOrder(String orderId) {
     orders.remove(orderId);
   }
 
-  public String checkOrderStatus(String orderId) {
+  public String checkOrderStatus(String orderId) throws OrderNotFoundException {
     Order order = orders.get(orderId);
+    // Asks if order is null and to throw the exception message 'Order with ID {orderId} not found'
+    // if it is.
+    if (order == null) {
+      throw new OrderNotFoundException("Order with ID " + orderId + " not found");
+    }
+    //
     return "Order ID: "
         + orderId
         + ", Product: "

lesson_14/exceptions/exceptions_app/src/main/java/com/codedifferently/lesson14/ecommerce/OrderNotFoundException.java

@@ -5,4 +5,10 @@
 
 package com.codedifferently.lesson14.ecommerce;
 
-class OrderNotFoundException {}
+// Custom Exception with the name OrderNotFoundException set to display a string message of your
+// choosing
+class OrderNotFoundException extends Exception {
+  public OrderNotFoundException(String message) {
+    super(message);
+  }
+}

lesson_14/exceptions/exceptions_app/src/main/java/com/codedifferently/lesson14/ecommerce/ProductNotFoundException.java

@@ -5,4 +5,10 @@
 
 package com.codedifferently.lesson14.ecommerce;
 
-class ProductNotFoundException {}
+// Custom Exception with the name ProductNotFoundException set to display a string message of your
+// choosing
+class ProductNotFoundException extends Exception {
+  public ProductNotFoundException(String message) {
+    super(message);
+  }
+}