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1
4 package com.opensymphony.webwork.example.ajax.cart;
5
6 import com.opensymphony.webwork.example.ajax.catalog.Product;
7
8 import java.util.HashMap  ;
9 import java.util.HashSet ;
10 import java.util.Map ;
11 import java.util.Set ;
12
13
18 public class DefaultCart implements ShoppingCart {
19 Map contents = new HashMap ();
20
21 public void addToCart(int quantity, Product product) {
22 CartEntry entry = (CartEntry) contents.get(product);
23 if (entry == null) {
24 entry = new DefaultCartEntry(quantity, product);
25 contents.put(product, entry);
26 } else {
27 entry.setQuantity(entry.getQuantity() + quantity);
28 }
29 }
30
31 public void setQuantity(int quantity, Product product) {
32 if (quantity <= 0) {
33 contents.remove(product);
34 return;
35 }
36 CartEntry entry = (CartEntry) contents.get(product);
37 if (entry == null) {
38 entry = new DefaultCartEntry(quantity, product);
39 contents.put(product, entry);
40 } else {
41 entry.setQuantity(quantity);
42 }
43 }
44
45 public void removeFromCart(Product product) {
46 contents.remove(product);
47 }
48
49 public Set getContents() {
50 return new HashSet (contents.values());
51 }
52
53 public int getQuantityForProduct(Product product) {
54 CartEntry entry = (CartEntry) contents.get(product);
55 if (entry == null) {
56 return 0;
57 }
58 return entry.getQuantity();
59 }
60
61 public String toString() {
62 return "DefaultCart{" +
63 "contents=" + contents +
64 "}";
65 }
66
67 class DefaultCartEntry implements CartEntry {
68 private int quantity;
69 private Product product;
70
71 public DefaultCartEntry(int quantity, Product product) {
72 this.quantity = quantity;
73 this.product = product;
74 }
75
76 public int getQuantity() {
77 return quantity;
78 }
79
80 public void setQuantity(int quantity) {
81 this.quantity = quantity;
82 }
83
84 public Product getProduct() {
85 return product;
86 }
87 }
88 }
89 |
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