1 | #region License Information
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2 |
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3 | /* HeuristicLab
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4 | * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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5 | *
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6 | * This file is part of HeuristicLab.
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7 | *
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8 | * HeuristicLab is free software: you can redistribute it and/or modify
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9 | * it under the terms of the GNU General Public License as published by
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10 | * the Free Software Foundation, either version 3 of the License, or
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11 | * (at your option) any later version.
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12 | *
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13 | * HeuristicLab is distributed in the hope that it will be useful,
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 | * GNU General Public License for more details.
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17 | *
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18 | * You should have received a copy of the GNU General Public License
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19 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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20 | */
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21 |
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22 | #endregion
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23 |
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24 | using System;
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25 | using System.Collections;
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26 | using System.Collections.Generic;
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27 | using System.Linq;
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28 | using HeuristicLab.Common;
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29 | using HeuristicLab.Core;
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30 | using HeuristicLab.Data;
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31 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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32 |
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33 | namespace HeuristicLab.Problems.DataAnalysis {
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34 | [Item("ModifiableDataset", "Represents a dataset containing data that should be analyzed, which can be modified by adding or replacing variables and values.")]
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35 | [StorableClass]
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36 | public class ModifiableDataset : Dataset, IStringConvertibleMatrix {
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37 | [StorableConstructor]
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38 | private ModifiableDataset(bool deserializing) : base(deserializing) { }
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39 | private ModifiableDataset(ModifiableDataset original, Cloner cloner) : base(original, cloner) { }
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40 | public override IDeepCloneable Clone(Cloner cloner) { return new ModifiableDataset(this, cloner); }
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41 | public ModifiableDataset() : base() { }
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42 | public ModifiableDataset(IEnumerable<string> variableNames, IEnumerable<IList> variableValues) : base(variableNames, variableValues) { }
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43 |
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44 | public void ReplaceRow(int row, IEnumerable<object> values) {
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45 | var list = values.ToList();
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46 | if (list.Count != variableNames.Count)
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47 | throw new ArgumentException("The number of values must be equal to the number of variable names.");
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48 | // check if all the values are of the correct type
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49 | for (int i = 0; i < list.Count; ++i) {
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50 | if (list[i].GetType() != GetVariableType(variableNames[i])) {
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51 | throw new ArgumentException("The type of the provided value does not match the variable type.");
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52 | }
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53 | }
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54 | // replace values
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55 | for (int i = 0; i < list.Count; ++i) {
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56 | variableValues[variableNames[i]][row] = list[i];
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57 | }
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58 | }
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59 |
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60 | public void AddRow(IEnumerable<object> values) {
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61 | var list = values.ToList();
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62 | if (list.Count != variableNames.Count)
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63 | throw new ArgumentException("The number of values must be equal to the number of variable names.");
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64 | // check if all the values are of the correct type
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65 | for (int i = 0; i < list.Count; ++i) {
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66 | if (list[i].GetType() != GetVariableType(variableNames[i])) {
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67 | throw new ArgumentException("The type of the provided value does not match the variable type.");
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68 | }
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69 | }
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70 | // add values
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71 | for (int i = 0; i < list.Count; ++i) {
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72 | variableValues[variableNames[i]].Add(list[i]);
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73 | }
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74 | rows++;
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75 | }
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76 |
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77 | // adds a new variable to the dataset
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78 | public void AddVariable<T>(string variableName, IEnumerable<T> values) {
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79 | if (variableValues.ContainsKey(variableName))
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80 | throw new ArgumentException("Variable " + variableName + " is already present in the dataset.");
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81 | int count = values.Count();
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82 | if (count != rows)
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83 | throw new ArgumentException("The number of values must exactly match the number of rows in the dataset.");
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84 | variableValues[variableName] = new List<T>(values);
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85 | variableNames.Add(variableName);
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86 | }
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87 |
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88 | public void RemoveVariable(string variableName) {
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89 | if (!variableValues.ContainsKey(variableName))
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90 | throw new ArgumentException("The variable " + variableName + " does not exist in the dataset.");
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91 | variableValues.Remove(variableName);
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92 | variableNames.Remove(variableName);
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93 | }
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94 |
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95 | // slow, avoid to use this
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96 | public void RemoveRow(int row) {
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97 | foreach (var list in variableValues.Values)
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98 | list.RemoveAt(row);
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99 | rows--;
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100 | }
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101 |
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102 | public void SetVariableValue(object value, string variableName, int row) {
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103 | IList list;
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104 | variableValues.TryGetValue(variableName, out list);
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105 | if (list == null)
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106 | throw new ArgumentException("The variable " + variableName + " does not exist in the dataset.");
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107 | if (row < 0 || list.Count < row)
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108 | throw new ArgumentOutOfRangeException("Invalid row value");
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109 | if (GetVariableType(variableName) != value.GetType())
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110 | throw new ArgumentException("The type of the provided value does not match the variable type.");
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111 |
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112 | list[row] = value;
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113 | }
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114 |
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115 | private Type GetVariableType(string variableName) {
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116 | IList list;
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117 | variableValues.TryGetValue(variableName, out list);
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118 | if (list == null)
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119 | throw new ArgumentException("The variable " + variableName + " does not exist in the dataset.");
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120 | return list[0].GetType();
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121 | }
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122 |
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123 | bool IStringConvertibleMatrix.SetValue(string value, int rowIndex, int columnIndex) {
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124 | var variableName = variableNames[columnIndex];
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125 | // if value represents a double
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126 | double dv;
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127 | if (double.TryParse(value, out dv)) {
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128 | SetVariableValue(dv, variableName, rowIndex);
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129 | return true;
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130 | }
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131 | // if value represents a DateTime object
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132 | DateTime dt;
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133 | if (DateTime.TryParse(value, out dt)) {
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134 | SetVariableValue(dt, variableName, rowIndex);
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135 | return true;
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136 | }
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137 | // if value is simply a string
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138 | SetVariableValue(value, variableName, rowIndex);
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139 | return true;
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140 | }
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141 |
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142 | bool IStringConvertibleMatrix.Validate(string value, out string errorMessage) {
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143 | return ValidateValue(value, out errorMessage);
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144 | }
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145 |
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146 | private static bool ValidateValue(string value, out string errorMessage) {
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147 | double dv;
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148 | if (double.TryParse(value, out dv)) {
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149 | errorMessage = string.Empty;
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150 | return true;
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151 | }
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152 | DateTime dt;
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153 | if (DateTime.TryParse(value, out dt)) {
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154 | errorMessage = string.Empty;
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155 | return true;
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156 | }
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157 | errorMessage = "Value could not be validated. Please ensure that the value is either a string, a double, or a DateTime value.";
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158 | return false;
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159 | }
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160 | }
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161 | }
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