fix: adds exception handling to files under ecommerce folder for lesson_14 homework - Joseph Caballero

Author: Josephcabs

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

@@ -17,19 +17,33 @@ 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);
+
+    if (product == null) {
+      throw new ProductNotFoundException("Product with ID " + productId + " not found");
+    }
     String orderId = UUID.randomUUID().toString();
     orders.put(orderId, new Order(orderId, product, quantity));
     return orderId;
   }
 
-  public void cancelOrder(String orderId) {
+  public void cancelOrder(String orderId) throws OrderNotFoundException {
+    if (orders == null) {
+      throw new OrderNotFoundException("Product with ID " + orderId + " not found");
+    }
     orders.remove(orderId);
   }
 
-  public String checkOrderStatus(String orderId) {
+  public String checkOrderStatus(String orderId)
+      throws OrderNotFoundException, ProductNotFoundException {
+
     Order order = orders.get(orderId);
+
+    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/Order.java

@@ -11,15 +11,15 @@ public Order(String orderId, Product product, int quantity) {
     this.quantity = quantity;
   }
 
-  public String getOrderId() {
+  public String getOrderId() throws OrderNotFoundException {
     return orderId;
   }
 
-  public Product getProduct() {
+  public Product getProduct() throws OrderNotFoundException {
     return product;
   }
 
-  public int getQuantity() {
+  public int getQuantity() throws OrderNotFoundException {
     return quantity;
   }
 }

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

@@ -5,4 +5,8 @@
 
 package com.codedifferently.lesson14.ecommerce;
 
-class OrderNotFoundException {}
+class OrderNotFoundException extends Exception {
+  public OrderNotFoundException(String message) {
+    super(message);
+  }
+}

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

@@ -9,11 +9,11 @@ public Product(String productId, String name) {
     this.name = name;
   }
 
-  public String getProductId() {
+  public String getProductId() throws ProductNotFoundException {
     return productId;
   }
 
-  public String getName() {
+  public String getName() throws ProductNotFoundException {
     return name;
   }
 }

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

@@ -5,4 +5,8 @@
 
 package com.codedifferently.lesson14.ecommerce;
 
-class ProductNotFoundException {}
+class ProductNotFoundException extends Exception {
+  public ProductNotFoundException(String message) {
+    super(message);
+  }
+}