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1
4 package demo.inventory;
5
6 import java.io.BufferedReader  ;
7 import java.io.IOException ;
8 import java.io.DataInputStream ;
9 import java.io.InputStreamReader ;
10 import java.io.PrintWriter ;
11 import java.io.StringWriter ;
12 import java.util.Iterator ;
13
14 public class Main
15 {
16 public Store store = new Store();
17 private PrintWriter out = new PrintWriter (System.out,true);
18
19 private void run()
20 {
21 menu_main();
22 }
23
24 public static void main(String [] args)
25 {
26 try
27 {
28 new Main().run();
29 }
30 catch(Exception e)
31 {
32 e.printStackTrace();
33 System.out.flush();
34 }
35 }
36
37 private void printInventory()
38 {
39 out.println("+-------------------+");
40 out.println("| Inventory Listing |");
41 out.println("+-------------------+");
42 out.println();
43 printProductHeader();
44 for(Iterator i = store.inventory.values().iterator(); i.hasNext(); )
45 {
46 Product p = (Product)i.next();
47 printProduct(p);
48 }
49 }
50
51 private void printDepartments()
52 {
53 out.println("+----------------------------------+");
54 out.println("| Inventory Listing by Departments |");
55 out.println("+----------------------------------+");
56 out.println();
57 for(Iterator i = store.departments.iterator(); i.hasNext(); )
58 {
59 Department d = (Department)i.next();
60 out.println("Department: "+d.getName());
61 Product[] products = d.getProducts();
62 for(int p=0; p < products.length; p++)
63 {
64 printProduct(products[p]);
65 }
66 out.println();
67 }
68 }
69
70 private void printProductHeader()
71 {
72 out.println("SKU Product Name Price");
73 out.println("------ ------------------ --------");
74 }
75
76 private void printProduct(Product p)
77 {
78 out.print(padString(p.sku,8));
79 out.print(padString(p.name,20));
80 out.print(padString(p.price+"",8));
81 out.println();
82 }
83
84 private void menu_main()
85 {
86 out.println();
87 out.println("DSO Inventory Manager");
88 out.println();
89 out.println("This sample application shows how to use Terracotta DSO to share and");
90 out.println("propagate changes to data structures.");
91 out.println();
92 out.println("To perform an action, press the key encased in the square-brackets");
93 out.println("from the list of options presented.");
94 out.println();
95 out.println("Press the [H] key for detailed information on each action.");
96 out.println();
97 while(true)
98 {
99 out.println();
100 out.println("+------------------------------------------------------------------+");
101 out.println("| [I]nventory [D]epartments [U]pdate [H]elp [Q]uit |");
102 out.println("+------------------------------------------------------------------+");
103 out.print("> ");
104 out.flush();
105 String input = getInput().trim().toUpperCase();
106
107 if (input.length() == 0)
108 continue;
109
110 switch(input.charAt(0))
111 {
112 case 'I':
113 printInventory();
114 continue;
115 case 'Q':
116 return;
117 case 'D':
118 printDepartments();
119 continue;
120 case 'U':
121 updatePrice();
122 continue;
123 case 'H':
124 printHelp();
125 continue;
126 }
127 }
128 }
129
130 private void updatePrice()
131 {
132 Product p = null;
133 {
134 printInventory();
135 out.println("\nEnter SKU of product to update:");
136 out.print("> ");
137 out.flush();
138 String s = getInput().toUpperCase();
139 p = (Product)store.inventory.get(s);
140 if (p == null)
141 {
142 out.print("[ERR] No such product with SKU '"+s+"'\n");
143 return;
144 }
145 }
146 double d = -1;
147 out.println();
148 do
149 {
150 out.println("Enter new price for '"+p.name+"': ");
151 out.print("> ");
152 out.flush();
153 String s = getInput().toUpperCase();
154 try
155 {
156 d = Double.valueOf(s).doubleValue();
157 }
158 catch(NumberFormatException nfe) { continue; }
159 synchronized(p)
160 {
161 p.setPrice(d);
162 };
163 } while(d < 0);
164 out.println("\nPrice updated:");
165 printProduct(p);
166 }
167
168 private String getInput()
169 {
170 BufferedReader stdin = new BufferedReader (new InputStreamReader (System.in));
171 try
172 {
173 return stdin.readLine();
174 }
175 catch(IOException ioe)
176 {
177 ioe.printStackTrace();
178 return "";
179 }
180 }
181
182 private String padString(String in, int length)
183 {
184 StringWriter out = new StringWriter ();
185 out.write(in);
186 length -= in.length();
187 for (int i=0; i<length; i++)
188 out.write(' ');
189 return out.toString();
190 }
191
192 private void printHelp()
193 {
194 out.println("+------+");
195 out.println("| Help |");
196 out.println("+------+");
197 out.println();
198 out.println("Press the key that correspond the action that you wish to perform");
199 out.println("Here is what each of the actions will do:");
200 out.println();
201 out.println("[I]nventory:");
202 out.println("This will list the contents of the inventory.");
203 out.println();
204 out.println("[D]epartments:");
205 out.println("This will list the contents of the inventory, grouped by the");
206 out.println("department that owns the inventory item.");
207 out.println();
208 out.println("[U]pdate:");
209 out.println("Takes you into 'edit' mode to change the 'price' field value");
210 out.println("of an inventory item.");
211 out.println();
212 out.println("[H]elp:");
213 out.println("Print this information.");
214 out.println();
215 out.println("[Q]uit:");
216 out.println("Exit this application.");
217 out.println();
218 }
219 }
220 |
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