From 11d647bd802e014bc941ebda7889fe9978807478 Mon Sep 17 00:00:00 2001
From: Kamal Wickramanayake <kamal@inbox.lk>
Date: Sun, 15 Mar 2026 15:41:09 +0530
Subject: Added Bill, PointOfSale, LineItem to OOP sample application

---
 .../src/lk/ac/pdn/ceit/pos/PointOfSale.java        | 29 ++++++++++++++++++++++
 .../src/lk/ac/pdn/ceit/pos/entities/Bill.java      | 16 ++++++++++++
 .../src/lk/ac/pdn/ceit/pos/entities/LineItem.java  | 29 ++++++++++++++++++++++
 3 files changed, 74 insertions(+)
 create mode 100644 oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/PointOfSale.java
 create mode 100644 oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/Bill.java
 create mode 100644 oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/LineItem.java

(limited to 'oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos')

diff --git a/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/PointOfSale.java b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/PointOfSale.java
new file mode 100644
index 0000000..990a635
--- /dev/null
+++ b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/PointOfSale.java
@@ -0,0 +1,29 @@
+package lk.ac.pdn.ceit.pos;
+
+import lk.ac.pdn.ceit.pos.entities.Bill;
+import lk.ac.pdn.ceit.pos.entities.Item;
+import lk.ac.pdn.ceit.pos.entities.LineItem;
+import lk.ac.pdn.ceit.pos.item.ItemManager;
+
+public class PointOfSale {
+
+    private ItemManager itemManager;
+
+    private Bill bill;
+
+    public Bill createNewBill() {
+        bill = new Bill();
+        return bill;
+    }
+
+    public void addLineItem(String itemId, int quantity) {
+        // From the ItemManager, get the Item.
+        Item item = itemManager.findById(itemId);
+
+        // Create a new LineItem and associate it with the item returned
+        LineItem lineItem = new LineItem(item, quantity);
+        
+        // Add the new LineItem to the bill
+        bill.getLineItems().add(lineItem);
+    }
+}
diff --git a/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/Bill.java b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/Bill.java
new file mode 100644
index 0000000..0c2ff5f
--- /dev/null
+++ b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/Bill.java
@@ -0,0 +1,16 @@
+package lk.ac.pdn.ceit.pos.entities;
+
+import java.util.List;
+
+public class Bill {
+    private List<LineItem> lineItems;
+
+    public List<LineItem> getLineItems() {
+        return lineItems;
+    }
+
+    public void setLineItems(List<LineItem> lineItems) {
+        this.lineItems = lineItems;
+    }
+   
+}
diff --git a/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/LineItem.java b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/LineItem.java
new file mode 100644
index 0000000..ad6abaf
--- /dev/null
+++ b/oop/10-point-of-sale/src/lk/ac/pdn/ceit/pos/entities/LineItem.java
@@ -0,0 +1,29 @@
+package lk.ac.pdn.ceit.pos.entities;
+
+public class LineItem {
+    private Item item;
+    private int quantity;
+ 
+    public LineItem(Item item, int quantity) {
+        this.item = item;
+        this.quantity = quantity;
+    }
+
+    public Item getItem() {
+        return item;
+    }
+
+    public void setItem(Item item) {
+        this.item = item;
+    }
+
+    public int getQuantity() {
+        return quantity;
+    }
+
+    public void setQuantity(int quantity) {
+        this.quantity = quantity;
+    }
+
+    
+}
-- 
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