Cleanup on isle 6

InventoryManagementSystem/src/main/java/inventory/DiscountCalculator.java

@@ -14,30 +14,6 @@ import static inventory.ProductFactory.BOOK_TYPE;
  */
 public class DiscountCalculator {
 
-    /**
-     * Inner class to hold discount calculation results.
-     */
-    public static class DiscountResult {
-        private final double discountAmount;
-        private final String description;
-
-        public DiscountResult(double discountAmount, String description) {
-            if (discountAmount < 0) {
-                throw new IllegalArgumentException("Discount amount must be greater than 0");
-            }
-            this.discountAmount = discountAmount;
-            this.description = Objects.requireNonNullElse(description, "");
-        }
-
-        public double getDiscountAmount() {
-            return discountAmount;
-        }
-
-        public String getDescription() {
-            return description;
-        }
-    }
-
     /**
      * @param product - the product being purchased
      * @param quantity - quantity being purchased
@@ -90,4 +66,14 @@ public class DiscountCalculator {
     private static boolean isEligibleForBulkDiscount(int quantity) {
         return quantity >= 5;
     }
+
+    public record DiscountResult(double discountAmount, String description) {
+        public DiscountResult(double discountAmount, String description) {
+            if (discountAmount < 0) {
+                throw new IllegalArgumentException("Discount amount must be greater than 0");
+            }
+            this.discountAmount = discountAmount;
+            this.description = Objects.requireNonNullElse(description, "");
+        }
+    }
 }