chore: added custom exceptions

Author: haldanek

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

@@ -17,51 +17,32 @@ public void addProduct(String productId, String name) {
     products.put(productId, new Product(productId, name));
   }
 
-  public String placeOrder(String productId, int quantity)  throws ProductNotFoundException, InvalidOrderQuantityException {
-    Product product = products.get(productId); {
+  public String placeOrder(String productId, int quantity) throws ProductNotFoundException {
+    Product product = products.get(productId);
+
+    if (!products.containsKey(productId)) {
+
+      throw new ProductNotFoundException("Product with ID " + productId + " not found");
+    }
     String orderId = UUID.randomUUID().toString();
     orders.put(orderId, new Order(orderId, product, quantity));
     return orderId;
-    
-    if (! products.containsKey(productId));
-    throw new ProductNotFoundException("Product with ID " + productId + "not found");
   }
-    if (quantity < 1); {
-    throw new InvalidOrderQuantityException("Quantity must be at least 1");
-}
-   
-}
 
   public void cancelOrder(String orderId) throws OrderNotFoundException {
-    orders.remove(orderId); {
-      
-      Order order = orders.get(orderId);
-      if (order == null) {
-        throw new OrderNotFoundException("Order with ID " + orderId + "not found");
-      }
-      if (order.getStatus().equals("Canceled")) {
-        throw new OrderNotFoundException("Order has already been canceled");
-      }
-      if (order.getStatus().equals("Processed")) {
-        throw new OrderNotFoundException("Order has already been processed");
-      }
-    }
+    orders.remove(orderId);
   }
 
   public String checkOrderStatus(String orderId) throws OrderNotFoundException {
-    Order order = orders.get(orderId); 
+    Order order = orders.get(orderId);
+    if (orders.get(orderId) == null) {
+      throw new OrderNotFoundException("Order with ID " + orderId + " not found");
+    }
     return "Order ID: "
         + orderId
         + ", Product: "
         + order.getProduct().getName()
         + ", Quantity: "
         + order.getQuantity();
-
-  if (orders.get(orderId) == null) {
-    throw new OrderNotFoundException("Order with ID " + orderId + "not found");
   }
-  if (orders.remove(orderId)) {
-    throw new OrderNotFoundException("Order with ID " + orderId + "not found");
-  }
-}
 }

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

@@ -5,4 +5,9 @@
 
 package com.codedifferently.lesson14.ecommerce;
 
-class ProductNotFoundException {}
+class ProductNotFoundException extends Exception {
+
+  public ProductNotFoundException(String message) {
+    super(message);
+  }
+}