Transaction operations available

diff --git a/Robust/src/Tests/Inventory.java b/Robust/src/Tests/Inventory.java
new file mode 100644 (file)
index 0000000..94d79e6
--- /dev/null
+++ b/Robust/src/Tests/Inventory.java
@@ -0,0 +1,91 @@
+public class Inventory {
+       // Inventory flags
+       flag TransInitialize;
+
+       // Transaction variables
+       int numitems;
+       int current;//keeps track of current position
+       int totalvalue;
+       
+       // Item properties
+       String item_name[];
+       int item_quantity[];
+       int item_price[];
+
+       // Constructor
+       public Inventory(){
+               current = 0;
+       }
+
+       public Inventory(int howmany) {
+               numitems = howmany;// howmany keeps track of the number of items 
+                                  // in the inventory
+               current = 0;
+               item_name = new String[howmany];
+               item_quantity = new int [howmany];
+               item_price = new int [howmany];
+               for (int i = 0; i < howmany; i++) {
+                       item_name[i] = "";
+                       item_quantity[i] = 0;
+                       item_price[i] = 0;
+               }
+       }
+
+       // Add item to a list of inventory
+       public int additem(String name, int quantity, int price){
+               //check current value
+               if(current>=numitems){
+                       System.printString("Cannot add any further items");
+                       return -1;
+               }
+               // Search thru existing items
+               for(int i=0; i<numitems;i++){
+                       if(item_name[i]== name){
+                               item_quantity[i]+= quantity;
+                               return 0;
+                       }
+               }
+               // Add new item if not found
+               item_name[current]= name;
+               item_quantity[current]= quantity;
+               item_price[current]= price;
+               current++;
+               return 0;
+       }       
+
+       // Buy item from a given list of inventory      
+       public int buyitem(String name, int quantity, int price){
+               //Search through existing items 
+               for(int i=0; i<numitems;i++){
+                       if(item_name[i]== name){
+                               item_quantity[i]-= quantity;
+                               if (item_quantity[i]<=0){// if the quantity falls 
+                                                       // to zero 
+                                       current--;
+                               }
+                               totalvalue = quantity*price;
+                               return 0;
+                       }
+               }
+               System.printString("Cannot find the item in the inventory");
+               return -1;
+                       
+       }
+
+       //Display the inventory list
+       public int inventory(){
+               Integer tmp;
+               for(int i=0; i<current; i++){
+                       System.printString(" The items are ");
+                       System.printString(item_name[i]);       
+               //      System.printString(" The sale is ");
+                       System.printString(" The quantity of item is ");
+                       tmp = new Integer(item_quantity[i]);
+                       System.printString(tmp.toString());
+                       System.printString(" The price of item is ");
+                       tmp = new Integer(item_price[i]);
+                       System.printString(tmp.toString());
+               }
+               return 0;
+       }       
+}