Robust/src/Tests/Inventory.java

   1 public class Inventory {
   2         // Inventory flags
   3         flag TransInitialize;
   4
   5         // Transaction variables
   6         int numitems;
   7         HashMap map;
   8
   9         // Constructor
  10         public Inventory(){
  11                 map = new HashMap();
  12         }
  13
  14         public Inventory(int howmany) {
  15                 numitems = howmany;// howmany keeps track of the number of items
  16                                    // in the inventory
  17                 map = new HashMap();
  18         }
  19
  20         // Add item to a list of inventory
  21         public int additem(String name, int quantity, int price){
  22                 ItemInfo newitem = new ItemInfo(quantity, price);
  23                 // Get the item from hash
  24                 if (map.containsKey(name) == false) {
  25                         map.put(name, newitem);
  26                 } else {
  27                         ItemInfo i = (ItemInfo) map.get(name);
  28                         i.quantity += quantity;
  29                         i.price = price;
  30                         map.put(name, i);
  31                 }
  32                 return 0;
  33         }
  34
  35         // Buy item from a given list of inventory
  36         public int buyitem(String name, int quantity){
  37                 if (map.containsKey(name) == false) {
  38                         System.printString("Error - Item does not exist");
  39                         return -1;
  40                 } else {
  41                         ItemInfo i = (ItemInfo) map.get(name);
  42                         if (i.quantity == 0) {
  43                                 System.printString("Error - Item unavailable");
  44                                 return -1;
  45                         }
  46                         if ((i.quantity-quantity) < 0 ) {
  47                                 System.printString("Error - Available qty is less: Cannot Buy\n");
  48                                 return -1;
  49                         } else {
  50                                 i.quantity -= quantity;
  51                                 map.put(name, i);
  52                                 return i.price;
  53                         }
  54                 }
  55                 return 0;
  56         }
  57
  58         //Display the inventory list
  59         public String inventory(){
  60                 HashMapIterator i = new HashMapIterator(map, 0);
  61                 HashMapIterator j = new HashMapIterator(map, 1);
  62                 StringBuffer sb = new StringBuffer("");
  63                 while (i.hasNext() == true) {
  64                         Object o = i.next();
  65                         String name = o.toString();
  66                         ItemInfo oo = (ItemInfo) j.next();
  67                         sb.append(name);
  68                         sb.append(" ");
  69                         Integer q = new Integer(oo.quantity);
  70                         sb.append(q.toString());
  71                         sb.append(" ");
  72                         Integer p = new Integer(oo.price);
  73                         sb.append(p.toString());
  74                         sb.append("\n");
  75                 }
  76                 String item = new String(sb);
  77                 return item;
  78         }
  79 }