update,

_resources/it114105/itp4507/Assignment/20-21/src/LunchSetWesternStyleMemento.java

@@ -0,0 +1,36 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+/**
+ *
+ * @author jerrykwok
+ */
+public class LunchSetWesternStyleMemento implements LunchSetMemento{
+
+    private String mainDish;
+    private int price;
+    private int availableCount;
+    private LunchSet lunchSet;
+
+    public LunchSetWesternStyleMemento(WesternStyleLunchSet lunchSet) {
+        this.mainDish = lunchSet.getMainDish();
+        this.price = lunchSet.getPrice();
+        this.availableCount = lunchSet.getAvailableCount();
+        this.lunchSet = lunchSet;
+    }
+
+       
+    @Override
+    public LunchSet getOrig() {
+        return lunchSet;
+    }
+
+    @Override
+    public void restore() {
+        lunchSet.setAvailableCount(availableCount);
+    }
+    
+}