1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections;
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24 | using System.Collections.Generic;
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25 | using System.Collections.ObjectModel;
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26 | using System.Linq;
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27 | using HeuristicLab.Common;
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28 | using HeuristicLab.Core;
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29 | using HeuristicLab.Data;
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30 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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31 |
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32 | namespace HeuristicLab.Problems.DataAnalysis {
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33 | [Item("Dataset", "Represents a dataset containing data that should be analyzed.")]
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34 | [StorableClass]
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35 | public class Dataset : NamedItem, IDataset {
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36 | [StorableConstructor]
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37 | protected Dataset(bool deserializing) : base(deserializing) { }
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38 | protected Dataset(Dataset original, Cloner cloner)
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39 | : base(original, cloner) {
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40 | variableValues = new Dictionary<string, IList>(original.variableValues);
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41 | variableNames = new List<string>(original.variableNames);
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42 | rows = original.rows;
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43 | }
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44 | public override IDeepCloneable Clone(Cloner cloner) { return new Dataset(this, cloner); }
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45 |
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46 | public Dataset()
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47 | : base() {
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48 | Name = "-";
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49 | VariableNames = Enumerable.Empty<string>();
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50 | variableValues = new Dictionary<string, IList>();
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51 | rows = 0;
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52 | }
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53 |
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54 | public Dataset(IEnumerable<string> variableNames, IEnumerable<IList> variableValues)
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55 | : base() {
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56 | Name = "-";
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57 | if (!variableNames.Any()) {
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58 | this.variableNames = Enumerable.Range(0, variableValues.Count()).Select(x => "Column " + x).ToList();
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59 | } else if (variableNames.Count() != variableValues.Count()) {
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60 | throw new ArgumentException("Number of variable names doesn't match the number of columns of variableValues");
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61 | } else if (!variableValues.All(list => list.Count == variableValues.First().Count)) {
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62 | throw new ArgumentException("The number of values must be equal for every variable");
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63 | } else if (variableNames.Distinct().Count() != variableNames.Count()) {
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64 | var duplicateVariableNames =
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65 | variableNames.GroupBy(v => v).Where(g => g.Count() > 1).Select(g => g.Key).ToList();
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66 | string message = "The dataset cannot contain duplicate variables names: " + Environment.NewLine;
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67 | foreach (var duplicateVariableName in duplicateVariableNames)
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68 | message += duplicateVariableName + Environment.NewLine;
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69 | throw new ArgumentException(message);
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70 | }
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71 |
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72 | rows = variableValues.First().Count;
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73 | this.variableNames = new List<string>(variableNames);
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74 | this.variableValues = new Dictionary<string, IList>(this.variableNames.Count);
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75 | for (int i = 0; i < this.variableNames.Count; i++) {
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76 | var values = variableValues.ElementAt(i);
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77 | IList clonedValues = null;
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78 | if (values is IList<double>)
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79 | clonedValues = new List<double>(values.Cast<double>());
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80 | else if (values is IList<string>)
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81 | clonedValues = new List<string>(values.Cast<string>());
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82 | else if (values is IList<DateTime>)
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83 | clonedValues = new List<DateTime>(values.Cast<DateTime>());
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84 | else {
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85 | this.variableNames = new List<string>();
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86 | this.variableValues = new Dictionary<string, IList>();
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87 | throw new ArgumentException("The variable values must be of type IList<double>, IList<string> or IList<DateTime>");
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88 | }
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89 | this.variableValues.Add(this.variableNames[i], clonedValues);
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90 | }
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91 | }
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92 |
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93 | public Dataset(IEnumerable<string> variableNames, double[,] variableValues) {
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94 | Name = "-";
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95 | if (variableNames.Count() != variableValues.GetLength(1)) {
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96 | throw new ArgumentException("Number of variable names doesn't match the number of columns of variableValues");
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97 | }
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98 | if (variableNames.Distinct().Count() != variableNames.Count()) {
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99 | var duplicateVariableNames = variableNames.GroupBy(v => v).Where(g => g.Count() > 1).Select(g => g.Key).ToList();
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100 | string message = "The dataset cannot contain duplicate variables names: " + Environment.NewLine;
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101 | foreach (var duplicateVariableName in duplicateVariableNames)
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102 | message += duplicateVariableName + Environment.NewLine;
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103 | throw new ArgumentException(message);
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104 | }
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105 |
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106 | rows = variableValues.GetLength(0);
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107 | this.variableNames = new List<string>(variableNames);
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108 |
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109 | this.variableValues = new Dictionary<string, IList>(variableValues.GetLength(1));
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110 | for (int col = 0; col < variableValues.GetLength(1); col++) {
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111 | string columName = this.variableNames[col];
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112 | var values = new List<double>(variableValues.GetLength(0));
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113 | for (int row = 0; row < variableValues.GetLength(0); row++) {
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114 | values.Add(variableValues[row, col]);
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115 | }
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116 | this.variableValues.Add(columName, values);
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117 | }
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118 | }
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119 |
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120 | #region Backwards compatible code, remove with 3.5
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121 | private double[,] storableData;
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122 | //name alias used to suppport backwards compatibility
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123 | [Storable(Name = "data", AllowOneWay = true)]
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124 | private double[,] StorableData { set { storableData = value; } }
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125 |
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126 | [StorableHook(HookType.AfterDeserialization)]
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127 | private void AfterDeserialization() {
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128 | if (variableValues == null) {
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129 | rows = storableData.GetLength(0);
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130 | variableValues = new Dictionary<string, IList>();
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131 | for (int col = 0; col < storableData.GetLength(1); col++) {
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132 | string columName = variableNames[col];
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133 | var values = new List<double>(rows);
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134 | for (int row = 0; row < rows; row++) {
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135 | values.Add(storableData[row, col]);
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136 | }
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137 | variableValues.Add(columName, values);
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138 | }
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139 | storableData = null;
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140 | }
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141 | }
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142 | #endregion
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143 |
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144 | [Storable(Name = "VariableValues")]
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145 | protected Dictionary<string, IList> variableValues;
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146 |
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147 | protected List<string> variableNames;
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148 | [Storable]
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149 | public IEnumerable<string> VariableNames {
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150 | get { return variableNames; }
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151 | protected set {
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152 | if (variableNames != null) throw new InvalidOperationException();
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153 | variableNames = new List<string>(value);
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154 | }
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155 | }
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156 | public IEnumerable<string> DoubleVariables {
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157 | get { return variableValues.Where(p => p.Value is List<double>).Select(p => p.Key); }
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158 | }
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159 | public IEnumerable<double> GetDoubleValues(string variableName) {
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160 | return GetValues<double>(variableName);
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161 | }
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162 | public IEnumerable<string> GetStringValues(string variableName) {
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163 | return GetValues<string>(variableName);
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164 | }
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165 | public IEnumerable<DateTime> GetDateTimeValues(string variableName) {
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166 | return GetValues<DateTime>(variableName);
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167 | }
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168 | public ReadOnlyCollection<double> GetReadOnlyDoubleValues(string variableName) {
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169 | var values = GetValues<double>(variableName).ToList();
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170 | return values.AsReadOnly();
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171 | }
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172 | public double GetDoubleValue(string variableName, int row) {
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173 | var values = GetValues<double>(variableName) as List<double>;
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174 | return values[row];
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175 | }
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176 | public IEnumerable<double> GetDoubleValues(string variableName, IEnumerable<int> rows) {
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177 | return GetValues<double>(variableName, rows);
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178 | }
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179 | private IEnumerable<T> GetValues<T>(string variableName, IEnumerable<int> rows) {
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180 | var values = GetValues<T>(variableName) as List<T>;
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181 | return rows.Select(x => values[x]);
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182 | }
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183 | private IEnumerable<T> GetValues<T>(string variableName) {
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184 | IList list;
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185 | if (!variableValues.TryGetValue(variableName, out list))
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186 | throw new ArgumentException("The variable " + variableName + " does not exist in the dataset.");
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187 | List<T> values = list as List<T>;
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188 | if (values == null) throw new ArgumentException("The variable " + variableName + " is not a " + typeof(T) + " variable.");
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189 | return values;
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190 | }
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191 | public bool VariableHasType<T>(string variableName) {
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192 | return variableValues[variableName] is IList<T>;
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193 | }
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194 |
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195 | #region IStringConvertibleMatrix Members
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196 | [Storable]
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197 | protected int rows;
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198 | public int Rows {
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199 | get { return rows; }
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200 | set { throw new NotSupportedException(); }
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201 | }
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202 | public int Columns {
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203 | get { return variableNames.Count; }
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204 | set { throw new NotSupportedException(); }
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205 | }
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206 | public bool SortableView {
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207 | get { return false; }
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208 | set { throw new NotSupportedException(); }
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209 | }
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210 | public bool ReadOnly {
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211 | get { return true; }
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212 | }
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213 | IEnumerable<string> IStringConvertibleMatrix.ColumnNames {
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214 | get { return this.VariableNames; }
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215 | set { throw new NotSupportedException(); }
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216 | }
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217 | IEnumerable<string> IStringConvertibleMatrix.RowNames {
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218 | get { return Enumerable.Empty<string>(); }
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219 | set { throw new NotSupportedException(); }
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220 | }
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221 | public string GetValue(int rowIndex, int columnIndex) {
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222 | return variableValues[variableNames[columnIndex]][rowIndex].ToString();
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223 | }
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224 | public bool SetValue(string value, int rowIndex, int columnIndex) {
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225 | throw new NotSupportedException();
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226 | }
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227 | public bool Validate(string value, out string errorMessage) {
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228 | throw new NotSupportedException();
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229 | }
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230 |
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231 | public event EventHandler ColumnsChanged { add { } remove { } }
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232 | public event EventHandler RowsChanged { add { } remove { } }
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233 | public event EventHandler ColumnNamesChanged { add { } remove { } }
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234 | public event EventHandler RowNamesChanged { add { } remove { } }
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235 | public event EventHandler SortableViewChanged { add { } remove { } }
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236 | public event EventHandler<EventArgs<int, int>> ItemChanged { add { } remove { } }
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237 | public event EventHandler Reset { add { } remove { } }
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238 | #endregion
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239 | }
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240 | }
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