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20
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1 using Stocks.Common.Core;
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2 using System.Collections;
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3 using System;
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4 using System.Collections.Generic;
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5
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6 namespace Stocks.Common.Models
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7 {
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8 public class Price : IEquatable<Price>, IComparable<Price>, IComparable
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9 {
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10 public string Symbol { get; set; }
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11 public decimal CurrentPrice { get; set; }
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12 public decimal PreviousPrice { get; set; }
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13
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14 public Price()
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15 {
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16 }
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17
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18 public Price(string symbol, decimal currentPrice, decimal previousPrice)
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19 : this()
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20 {
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21 Symbol = symbol;
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22 CurrentPrice = currentPrice;
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23 PreviousPrice = previousPrice;
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24 }
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25
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26 public override bool Equals(object obj)
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27 {
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28 if (obj is Price)
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29 return Equals(obj as Price);
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30 else
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31 return false;
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32 }
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33
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34 public bool Equals(Price other)
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35 {
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36 return (Symbol == other.Symbol
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37 && CurrentPrice == other.CurrentPrice
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38 && PreviousPrice == other.PreviousPrice);
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39 }
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40
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41 public int CompareTo(Price other)
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42 {
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43 return Symbol.CompareTo(other.Symbol);
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44 }
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45
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46 public int CompareTo(Price other, PriceComparisonType comparisonType)
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47 {
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48 switch (comparisonType)
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49 {
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50 case PriceComparisonType.NotSet:
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51 case PriceComparisonType.Symbol:
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52 return Symbol.CompareTo(other.Symbol);
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53 case PriceComparisonType.CurrentPrice:
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54 return CurrentPrice.CompareTo(other.CurrentPrice);
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55 case PriceComparisonType.PreviousPrice:
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56 return PreviousPrice.CompareTo(other.PreviousPrice);
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57 default:
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58 throw new Exception("Unknown comparison type");
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59 }
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60 }
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61
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62 public int CompareTo(object obj)
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63 {
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64 Price other;
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65 if (obj is Price)
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66 other = obj as Price;
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67 else
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68 throw new ArgumentException("obj is not a Price");
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69
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70 return CompareTo(other);
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71 }
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72 public override int GetHashCode()
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73 {
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74 int hash = 13;
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75 hash = (hash * 7) + Symbol.GetHashCode();
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76 hash = (hash * 7) + CurrentPrice.GetHashCode();
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77 hash = (hash * 7) + PreviousPrice.GetHashCode();
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78 return hash;
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79 }
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80
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81 public static bool operator ==(Price lhs, Price rhs)
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82 {
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83 if (System.Object.ReferenceEquals(lhs, rhs))
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84 return true;
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85
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86 if (((object)lhs == null) || ((object)rhs == null))
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87 return false;
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88
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89 return lhs.Symbol == rhs.Symbol
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90 && lhs.CurrentPrice == rhs.CurrentPrice
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91 && lhs.PreviousPrice == rhs.PreviousPrice;
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92 }
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93
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94 public static bool operator !=(Price lhs, Price rhs)
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95 {
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96 return !(lhs == rhs);
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97 }
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98
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99
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100 public class PriceComparer : IComparer<Price>, IComparer
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101 {
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102 public PriceComparisonType ComparisonMethod { get; set; }
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103
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104 public int Compare(Price x, Price y)
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105 {
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106 return x.CompareTo(y, ComparisonMethod);
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107 }
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108
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109 public int Compare(object x, object y)
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110 {
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111 Price lhs, rhs;
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112
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113 if (x is Price)
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114 lhs = x as Price;
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115 else
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116 throw new ArgumentException("x is not a Price");
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117
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118 if (y is Price)
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119 rhs = y as Price;
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120 else
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121 throw new ArgumentException("y is not a Price");
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122
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123 return lhs.CompareTo(rhs, ComparisonMethod);
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124 }
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125 }
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126 }
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127
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128 public enum PriceComparisonType { NotSet = 0, Symbol, CurrentPrice, PreviousPrice }
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129 }
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