1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2013 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.Generic;
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24 | using System.Linq;
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25 | using HeuristicLab.Common;
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26 | using HeuristicLab.Core;
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27 | using HeuristicLab.Data;
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28 | using HeuristicLab.Parameters;
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29 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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30 |
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31 | namespace HeuristicLab.Operators {
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32 | [Item("DataReducer", "An operator to reduce values of sub scopes.")]
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33 | [StorableClass]
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34 | public sealed class DataReducer : SingleSuccessorOperator {
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35 | #region Parameter Properties
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36 | public ScopeTreeLookupParameter<IItem> ParameterToReduce {
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37 | get { return (ScopeTreeLookupParameter<IItem>)Parameters["ParameterToReduce"]; }
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38 | }
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39 | public LookupParameter<IItem> TargetParameter {
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40 | get { return (LookupParameter<IItem>)Parameters["TargetParameter"]; }
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41 | }
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42 | public ValueParameter<ReductionOperation> ReductionOperation {
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43 | get { return (ValueParameter<ReductionOperation>)Parameters["ReductionOperation"]; }
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44 | }
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45 | public ValueParameter<ReductionOperation> TargetOperation {
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46 | get { return (ValueParameter<ReductionOperation>)Parameters["TargetOperation"]; }
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47 | }
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48 | #endregion
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49 |
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50 | [StorableConstructor]
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51 | private DataReducer(bool deserializing) : base(deserializing) { }
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52 | private DataReducer(DataReducer original, Cloner cloner)
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53 | : base(original, cloner) {
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54 | }
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55 | public DataReducer()
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56 | : base() {
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57 | #region Create parameters
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58 | Parameters.Add(new ScopeTreeLookupParameter<IItem>("ParameterToReduce", "The parameter on which the reduction operation should be applied."));
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59 | Parameters.Add(new LookupParameter<IItem>("TargetParameter", "The target variable in which the reduced value should be stored."));
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60 | Parameters.Add(new ValueParameter<ReductionOperation>("ReductionOperation", "The operation which is applied on the parameters to reduce."));
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61 | Parameters.Add(new ValueParameter<ReductionOperation>("TargetOperation", "The operation used to apply the reduced value to the target variable."));
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62 | #endregion
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63 | }
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64 |
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65 | public override IDeepCloneable Clone(Cloner cloner) {
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66 | return new DataReducer(this, cloner);
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67 | }
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68 |
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69 | public override IOperation Apply() {
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70 | var values = ParameterToReduce.ActualValue;
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71 | if (values.Count() > 0) {
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72 | if (values.All(x => typeof(IntValue).IsAssignableFrom(x.GetType()))) {
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73 | CalculateResult(values.OfType<IntValue>().Select(x => x.Value), values.First().GetType());
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74 | } else if (values.All(x => typeof(DoubleValue).IsAssignableFrom(x.GetType()))) {
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75 | CalculateResult(values.OfType<DoubleValue>().Select(x => x.Value), values.First().GetType());
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76 | } else if (values.All(x => typeof(TimeSpanValue).IsAssignableFrom(x.GetType()))) {
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77 | CalculateResult(values.OfType<TimeSpanValue>().Select(x => x.Value), values.First().GetType());
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78 | } else {
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79 | throw new ArgumentException(string.Format("Type {0} is not supported by the DataReducer.", values.First().GetType()));
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80 | }
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81 | }
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82 | return base.Apply();
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83 | }
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84 |
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85 | #region integer reduction
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86 | private void CalculateResult(IEnumerable<int> values, Type targetType) {
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87 | int result;
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88 | switch (ReductionOperation.Value.Value) {
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89 | case ReductionOperations.Sum:
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90 | result = values.Sum();
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91 | break;
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92 | case ReductionOperations.Product:
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93 | result = values.Aggregate(1, (x, y) => x * y);
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94 | break;
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95 | case ReductionOperations.Count:
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96 | result = values.Count();
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97 | break;
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98 | case ReductionOperations.Min:
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99 | result = values.Min();
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100 | break;
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101 | case ReductionOperations.Max:
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102 | result = values.Max();
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103 | break;
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104 | case ReductionOperations.Avg:
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105 | result = (int)Math.Round(values.Average());
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106 | break;
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107 | case ReductionOperations.Assign:
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108 | result = values.Last();
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109 | break;
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110 | default:
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111 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as ReductionOperation for type: {1}.", ReductionOperation.Value.Value, targetType));
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112 | }
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113 |
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114 | IntValue target;
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115 | switch (TargetOperation.Value.Value) {
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116 | case ReductionOperations.Sum:
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117 | target = InitializeTarget<IntValue, int>(targetType, 0);
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118 | target.Value += result;
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119 | break;
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120 | case ReductionOperations.Product:
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121 | target = InitializeTarget<IntValue, int>(targetType, 1);
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122 | target.Value = target.Value * result;
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123 | break;
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124 | case ReductionOperations.Min:
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125 | target = InitializeTarget<IntValue, int>(targetType, int.MaxValue);
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126 | target.Value = Math.Min(target.Value, result);
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127 | break;
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128 | case ReductionOperations.Max:
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129 | target = InitializeTarget<IntValue, int>(targetType, int.MinValue);
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130 | target.Value = Math.Max(target.Value, result);
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131 | break;
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132 | case ReductionOperations.Avg:
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133 | target = InitializeTarget<IntValue, int>(targetType, result);
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134 | target.Value = (int)Math.Round((target.Value + result) / 2.0);
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135 | break;
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136 | case ReductionOperations.Assign:
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137 | target = InitializeTarget<IntValue, int>(targetType, 0);
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138 | target.Value = result;
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139 | break;
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140 | default:
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141 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as TargetOperation for type: {1}.", TargetOperation.Value.Value, targetType));
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142 | }
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143 | }
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144 | #endregion
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145 | #region double reduction
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146 | private void CalculateResult(IEnumerable<double> values, Type targetType) {
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147 | double result;
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148 | switch (ReductionOperation.Value.Value) {
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149 | case ReductionOperations.Sum:
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150 | result = values.Sum();
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151 | break;
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152 | case ReductionOperations.Product:
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153 | result = values.Aggregate(1.0, (x, y) => x * y);
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154 | break;
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155 | case ReductionOperations.Count:
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156 | result = values.Count();
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157 | break;
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158 | case ReductionOperations.Min:
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159 | result = values.Min();
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160 | break;
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161 | case ReductionOperations.Max:
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162 | result = values.Max();
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163 | break;
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164 | case ReductionOperations.Avg:
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165 | result = values.Average();
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166 | break;
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167 | case ReductionOperations.Assign:
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168 | result = values.Last();
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169 | break;
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170 | default:
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171 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as ReductionOperation for type: {1}.", ReductionOperation.Value.Value, targetType));
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172 | }
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173 |
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174 | DoubleValue target;
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175 | switch (TargetOperation.Value.Value) {
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176 | case ReductionOperations.Sum:
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177 | target = InitializeTarget<DoubleValue, double>(targetType, 0.0);
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178 | target.Value += result;
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179 | break;
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180 | case ReductionOperations.Product:
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181 | target = InitializeTarget<DoubleValue, double>(targetType, 1.0);
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182 | target.Value = target.Value * result;
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183 | break;
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184 | case ReductionOperations.Min:
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185 | target = InitializeTarget<DoubleValue, double>(targetType, double.MaxValue);
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186 | target.Value = Math.Min(target.Value, result);
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187 | break;
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188 | case ReductionOperations.Max:
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189 | target = InitializeTarget<DoubleValue, double>(targetType, double.MinValue);
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190 | target.Value = Math.Max(target.Value, result);
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191 | break;
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192 | case ReductionOperations.Avg:
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193 | target = InitializeTarget<DoubleValue, double>(targetType, result);
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194 | target.Value = (target.Value + result) / 2.0;
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195 | break;
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196 | case ReductionOperations.Assign:
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197 | target = InitializeTarget<DoubleValue, double>(targetType, 0.0);
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198 | target.Value = result;
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199 | break;
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200 | default:
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201 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as TargetOperation for type: {1}.", TargetOperation.Value.Value, targetType));
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202 | }
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203 | }
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204 | #endregion
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205 | #region TimeSpan reduction
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206 | private void CalculateResult(IEnumerable<TimeSpan> values, Type targetType) {
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207 | TimeSpan result;
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208 | switch (ReductionOperation.Value.Value) {
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209 | case ReductionOperations.Sum:
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210 | result = values.Aggregate(new TimeSpan(), (x, y) => x + y);
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211 | break;
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212 | case ReductionOperations.Min:
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213 | result = values.Min();
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214 | break;
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215 | case ReductionOperations.Max:
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216 | result = values.Max();
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217 | break;
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218 | case ReductionOperations.Avg:
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219 | result = TimeSpan.FromMilliseconds(values.Average(x => x.TotalMilliseconds));
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220 | break;
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221 | case ReductionOperations.Assign:
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222 | result = values.Last();
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223 | break;
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224 | default:
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225 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as ReductionOperation for type: {1}.", ReductionOperation.Value.Value, targetType));
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226 | }
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227 |
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228 | TimeSpanValue target;
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229 | switch (TargetOperation.Value.Value) {
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230 | case ReductionOperations.Sum:
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231 | target = InitializeTarget<TimeSpanValue, TimeSpan>(targetType, new TimeSpan());
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232 | target.Value += result;
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233 | break;
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234 | case ReductionOperations.Min:
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235 | target = InitializeTarget<TimeSpanValue, TimeSpan>(targetType, TimeSpan.MaxValue);
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236 | target.Value = target.Value < result ? target.Value : result;
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237 | break;
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238 | case ReductionOperations.Max:
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239 | target = InitializeTarget<TimeSpanValue, TimeSpan>(targetType, TimeSpan.MinValue);
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240 | target.Value = target.Value > result ? target.Value : result;
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241 | break;
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242 | case ReductionOperations.Avg:
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243 | target = InitializeTarget<TimeSpanValue, TimeSpan>(targetType, result);
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244 | target.Value = TimeSpan.FromMilliseconds((target.Value.TotalMilliseconds + result.TotalMilliseconds) / 2);
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245 | break;
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246 | case ReductionOperations.Assign:
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247 | target = InitializeTarget<TimeSpanValue, TimeSpan>(targetType, new TimeSpan());
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248 | target.Value = result;
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249 | break;
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250 | default:
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251 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as TargetOperation for type: {1}.", TargetOperation.Value.Value, targetType));
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252 | }
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253 | }
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254 | #endregion
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255 |
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256 | #region helpers
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257 | private T1 InitializeTarget<T1, T2>(Type targetType, T2 initialValue)
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258 | where T1 : ValueTypeValue<T2>
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259 | where T2 : struct {
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260 | T1 target = (T1)TargetParameter.ActualValue;
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261 | if (target == null) {
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262 | target = (T1)Activator.CreateInstance(targetType);
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263 | TargetParameter.ActualValue = target;
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264 | target.Value = initialValue;
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265 | }
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266 | return target;
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267 | }
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268 | #endregion
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269 | }
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270 | }
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