source: BMXNET_RPMS_dotNET_UTILITIES-BMX/branch/IHS BMX Framework/lib/NUnit/NUnit-2.5.10.11092/samples/csharp/money/MoneyBag.cs@ 1146

Last change on this file since 1146 was 1146, checked in by Sam Habiel, 13 years ago

Initial Import of BMX4
File size: 4.0 KB
Line 
1// ****************************************************************
2// This is free software licensed under the NUnit license. You
3// may obtain a copy of the license as well as information regarding
4// copyright ownership at http://nunit.org/?p=license&r=2.4.
5// ****************************************************************
6
7namespace NUnit.Samples.Money
8{
9
10 using System;
11 using System.Collections;
12 using System.Text;
13
14 /// <summary>A MoneyBag defers exchange rate conversions.</summary>
15 /// <remarks>For example adding
16 /// 12 Swiss Francs to 14 US Dollars is represented as a bag
17 /// containing the two Monies 12 CHF and 14 USD. Adding another
18 /// 10 Swiss francs gives a bag with 22 CHF and 14 USD. Due to
19 /// the deferred exchange rate conversion we can later value a
20 /// MoneyBag with different exchange rates.
21 ///
22 /// A MoneyBag is represented as a list of Monies and provides
23 /// different constructors to create a MoneyBag.</remarks>
24 class MoneyBag: IMoney
25 {
26 private ArrayList fMonies= new ArrayList(5);
27
28 private MoneyBag()
29 {
30 }
31 public MoneyBag(Money[] bag)
32 {
33 for (int i= 0; i < bag.Length; i++)
34 {
35 if (!bag[i].IsZero)
36 AppendMoney(bag[i]);
37 }
38 }
39 public MoneyBag(Money m1, Money m2)
40 {
41 AppendMoney(m1);
42 AppendMoney(m2);
43 }
44 public MoneyBag(Money m, MoneyBag bag)
45 {
46 AppendMoney(m);
47 AppendBag(bag);
48 }
49 public MoneyBag(MoneyBag m1, MoneyBag m2)
50 {
51 AppendBag(m1);
52 AppendBag(m2);
53 }
54 public IMoney Add(IMoney m)
55 {
56 return m.AddMoneyBag(this);
57 }
58 public IMoney AddMoney(Money m)
59 {
60 return (new MoneyBag(m, this)).Simplify();
61 }
62 public IMoney AddMoneyBag(MoneyBag s)
63 {
64 return (new MoneyBag(s, this)).Simplify();
65 }
66 private void AppendBag(MoneyBag aBag)
67 {
68 foreach (Money m in aBag.fMonies)
69 AppendMoney(m);
70 }
71 private void AppendMoney(Money aMoney)
72 {
73 IMoney old= FindMoney(aMoney.Currency);
74 if (old == null)
75 {
76 fMonies.Add(aMoney);
77 return;
78 }
79 fMonies.Remove(old);
80 IMoney sum= old.Add(aMoney);
81 if (sum.IsZero)
82 return;
83 fMonies.Add(sum);
84 }
85 private bool Contains(Money aMoney)
86 {
87 Money m= FindMoney(aMoney.Currency);
88 return m.Amount == aMoney.Amount;
89 }
90 public override bool Equals(Object anObject)
91 {
92 if (IsZero)
93 if (anObject is IMoney)
94 return ((IMoney)anObject).IsZero;
95
96 if (anObject is MoneyBag)
97 {
98 MoneyBag aMoneyBag= (MoneyBag)anObject;
99 if (aMoneyBag.fMonies.Count != fMonies.Count)
100 return false;
101
102 foreach (Money m in fMonies)
103 {
104 if (!aMoneyBag.Contains(m))
105 return false;
106 }
107 return true;
108 }
109 return false;
110 }
111 private Money FindMoney(String currency)
112 {
113 foreach (Money m in fMonies)
114 {
115 if (m.Currency.Equals(currency))
116 return m;
117 }
118 return null;
119 }
120 public override int GetHashCode()
121 {
122 int hash= 0;
123 foreach (Money m in fMonies)
124 {
125 hash^= m.GetHashCode();
126 }
127 return hash;
128 }
129 public bool IsZero
130 {
131 get { return fMonies.Count == 0; }
132 }
133 public IMoney Multiply(int factor)
134 {
135 MoneyBag result= new MoneyBag();
136 if (factor != 0)
137 {
138 foreach (Money m in fMonies)
139 {
140 result.AppendMoney((Money)m.Multiply(factor));
141 }
142 }
143 return result;
144 }
145 public IMoney Negate()
146 {
147 MoneyBag result= new MoneyBag();
148 foreach (Money m in fMonies)
149 {
150 result.AppendMoney((Money)m.Negate());
151 }
152 return result;
153 }
154 private IMoney Simplify()
155 {
156 if (fMonies.Count == 1)
157 return (IMoney)fMonies[0];
158 return this;
159 }
160 public IMoney Subtract(IMoney m)
161 {
162 return Add(m.Negate());
163 }
164 public override String ToString()
165 {
166 StringBuilder buffer = new StringBuilder();
167 buffer.Append("{");
168 foreach (Money m in fMonies)
169 buffer.Append(m);
170 buffer.Append("}");
171 return buffer.ToString();
172 }
173 }
174}
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