1 | using System;
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2 | using HeuristicLab.Persistence.Interfaces;
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3 | using HeuristicLab.Persistence.Core;
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4 | using System.Collections.Generic;
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5 | using System.Reflection;
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6 | using System.Globalization;
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7 | using System.Text;
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8 | using System.Collections;
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9 |
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10 | namespace HeuristicLab.Persistence.Default.Decomposers {
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11 |
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12 | public class Number2StringDecomposer : IDecomposer {
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13 |
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14 | private static readonly List<Type> numberTypes =
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15 | new List<Type> {
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16 | typeof(bool),
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17 | typeof(byte),
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18 | typeof(sbyte),
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19 | typeof(short),
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20 | typeof(ushort),
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21 | typeof(int),
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22 | typeof(uint),
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23 | typeof(long),
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24 | typeof(ulong),
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25 | typeof(float),
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26 | typeof(double),
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27 | typeof(decimal),
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28 | };
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29 |
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30 | private static readonly Dictionary<Type, MethodInfo> numberParser;
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31 |
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32 | static Number2StringDecomposer() {
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33 | numberParser = new Dictionary<Type, MethodInfo>();
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34 | foreach ( var type in numberTypes ) {
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35 | numberParser[type] = type
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36 | .GetMethod("Parse", BindingFlags.Static | BindingFlags.Public,
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37 | null, new[] {typeof (string)}, null);
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38 | }
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39 | }
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40 |
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41 | public bool CanDecompose(Type type) {
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42 | return numberParser.ContainsKey(type);
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43 | }
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44 |
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45 | public string SimpleDecompose(object obj) {
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46 | if (obj.GetType() == typeof(float))
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47 | return ((float)obj).ToString("r", CultureInfo.InvariantCulture);
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48 | else if (obj.GetType() == typeof(double))
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49 | return ((double)obj).ToString("r", CultureInfo.InvariantCulture);
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50 | else if (obj.GetType() == typeof(decimal))
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51 | return ((decimal)obj).ToString("r", CultureInfo.InvariantCulture);
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52 | else
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53 | return obj.ToString();
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54 | }
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55 |
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56 | public IEnumerable<Tag> DeCompose(object obj) {
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57 | yield return new Tag(SimpleDecompose(obj));
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58 | }
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59 |
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60 | public object CreateInstance(Type type) {
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61 | return null;
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62 | }
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63 |
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64 | public object Parse(string stringValue, Type type) {
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65 | return numberParser[type]
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66 | .Invoke(null,
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67 | BindingFlags.Static | BindingFlags.PutRefDispProperty,
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68 | null, new[] {stringValue}, CultureInfo.InvariantCulture);
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69 | }
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70 |
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71 | public object Populate(object instance, IEnumerable<Tag> tags, Type type) {
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72 | foreach (Tag tag in tags)
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73 | return Parse((string)tag.Value, type);
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74 | throw new ApplicationException("not enough tags to re-compose number.");
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75 | }
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76 |
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77 | }
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78 |
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79 | public class DateTime2StringDecomposer : IDecomposer {
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80 |
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81 | public bool CanDecompose(Type type) {
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82 | return type == typeof(DateTime);
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83 | }
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84 |
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85 | public IEnumerable<Tag> DeCompose(object obj) {
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86 | yield return new Tag(((DateTime)obj).Ticks);
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87 | }
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88 |
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89 | public object CreateInstance(Type type) {
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90 | return null;
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91 | }
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92 |
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93 | public object Populate(object instance, IEnumerable<Tag> tags, Type type) {
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94 | foreach (Tag tag in tags) {
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95 | return new DateTime((long)tag.Value);
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96 | }
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97 | throw new ApplicationException("Not enough components to compose a bool.");
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98 | }
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99 |
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100 | }
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101 |
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102 | public class CompactNumberArray2StringDecomposer : IDecomposer {
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103 |
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104 | private static readonly Number2StringDecomposer numberDecomposer =
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105 | new Number2StringDecomposer();
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106 |
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107 | public bool CanDecompose(Type type) {
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108 | return
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109 | (type.IsArray || type == typeof (Array)) &&
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110 | numberDecomposer.CanDecompose(type.GetElementType());
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111 | }
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112 |
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113 | public IEnumerable<Tag> DeCompose(object obj) {
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114 | Array a = (Array) obj;
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115 | StringBuilder sb = new StringBuilder();
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116 | sb.Append(a.Rank).Append(';');
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117 | for ( int i = 0; i<a.Rank; i++ )
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118 | sb.Append(a.GetLength(i)).Append(';');
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119 | for ( int i = 0; i<a.Rank; i++)
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120 | sb.Append(a.GetLowerBound(i)).Append(';');
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121 | foreach (var number in a) {
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122 | sb.Append(numberDecomposer.SimpleDecompose(number)).Append(';');
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123 | }
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124 | yield return new Tag("compact array", sb.ToString());
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125 | }
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126 |
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127 | public object CreateInstance(Type type) {
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128 | return null;
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129 | }
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130 |
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131 | public object Populate(object instance, IEnumerable<Tag> tags, Type type) {
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132 | var iter = tags.GetEnumerator();
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133 | iter.MoveNext();
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134 | var it = ((string) iter.Current.Value).Split(new[] {';'}, StringSplitOptions.RemoveEmptyEntries).GetEnumerator();
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135 | it.MoveNext();
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136 | int rank = int.Parse((string) it.Current);
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137 | it.MoveNext();
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138 | int[] lengths = new int[rank];
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139 | int[] lowerBounds = new int[rank];
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140 | for (int i = 0; i < rank; i++, it.MoveNext())
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141 | lengths[i] = int.Parse((string) it.Current);
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142 | for (int i = 0; i < rank; i++, it.MoveNext())
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143 | lowerBounds[i] = int.Parse((string)it.Current);
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144 | Array a = Array.CreateInstance(type.GetElementType(), lengths, lowerBounds);
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145 | int[] positions = (int[]) lowerBounds.Clone();
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146 | while (it.MoveNext()) {
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147 | a.SetValue(
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148 | numberDecomposer.Parse((string)it.Current, type.GetElementType()),
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149 | positions);
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150 | positions[0] += 1;
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151 | for ( int i = 0; i<rank-1; i++ ) {
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152 | if (positions[i] >= lengths[i] + lowerBounds[i]) {
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153 | positions[i + 1] += 1;
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154 | positions[i] = lowerBounds[i];
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155 | } else {
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156 | break;
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157 | }
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158 | }
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159 | }
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160 | return a;
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161 | }
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162 | }
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163 |
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164 | public class NumberEnumerable2StringDecomposer : IDecomposer {
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165 |
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166 | private static readonly Number2StringDecomposer numberDecomposer =
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167 | new Number2StringDecomposer();
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168 |
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169 | public bool ImplementsGenericEnumerable(Type type) {
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170 | foreach( Type iface in type.GetInterfaces() ) {
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171 | if ( iface.IsGenericType &&
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172 | iface.GetGenericTypeDefinition() == typeof(IEnumerable<>) &&
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173 | numberDecomposer.CanDecompose(iface.GetGenericArguments()[0]) )
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174 | return true;
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175 | }
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176 | return false;
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177 | }
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178 |
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179 | public bool HasAddMethod(Type type) {
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180 | return
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181 | type.GetMethod("Add") != null &&
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182 | type.GetMethod("Add").GetParameters().Length == 1 &&
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183 | type.GetConstructor(
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184 | BindingFlags.Public |
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185 | BindingFlags.NonPublic |
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186 | BindingFlags.Instance,
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187 | null, Type.EmptyTypes, null) != null;
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188 | }
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189 |
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190 | public bool CanDecompose(Type type) {
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191 | return
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192 | ImplementsGenericEnumerable(type) &&
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193 | HasAddMethod(type);
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194 | }
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195 |
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196 | public IEnumerable<Tag> DeCompose(object obj) {
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197 | Type elementType = obj.GetType().GetGenericArguments()[0];
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198 | Type instantiatedGenericInterface =
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199 | typeof (IEnumerable<>).MakeGenericType(new[] {elementType});
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200 | MethodInfo genericGetEnumeratorMethod =
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201 | instantiatedGenericInterface.GetMethod("GetEnumerator");
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202 | InterfaceMapping iMap = obj.GetType().GetInterfaceMap(instantiatedGenericInterface);
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203 | MethodInfo getEnumeratorMethod =
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204 | iMap.TargetMethods[Array.IndexOf(iMap.InterfaceMethods, genericGetEnumeratorMethod)];
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205 | object[] empty = new object[] {};
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206 | object genericEnumerator = getEnumeratorMethod.Invoke(obj, empty);
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207 | MethodInfo moveNextMethod = genericEnumerator.GetType().GetMethod("MoveNext");
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208 | PropertyInfo currentProperty = genericEnumerator.GetType().GetProperty("Current");
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209 | StringBuilder sb = new StringBuilder();
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210 | while ( (bool)moveNextMethod.Invoke(genericEnumerator, empty) )
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211 | sb.Append(
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212 | numberDecomposer.SimpleDecompose(
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213 | currentProperty.GetValue(genericEnumerator, null))).Append(';');
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214 | yield return new Tag("compact enumerable", sb.ToString());
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215 | }
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216 |
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217 | public object CreateInstance(Type type) {
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218 | return Activator.CreateInstance(type, true);
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219 | }
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220 |
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221 | public object Populate(object instance, IEnumerable<Tag> tags, Type type) {
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222 | Type elementType = type.GetGenericArguments()[0];
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223 | MethodInfo addMethod = type.GetMethod("Add");
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224 | var tagEnumerator = tags.GetEnumerator();
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225 | tagEnumerator.MoveNext();
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226 | string[] stringValues = ((string) tagEnumerator.Current.Value)
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227 | .Split(new[] {';'}, StringSplitOptions.RemoveEmptyEntries);
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228 | foreach (var value in stringValues) {
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229 | addMethod.Invoke(instance, new[] {numberDecomposer.Parse(value, elementType)});
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230 | }
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231 | return instance;
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232 | }
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233 |
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234 | }
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235 |
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236 | } |
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