[7395] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2012 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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[8331] | 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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[7395] | 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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[8331] | 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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[7395] | 88 | switch (ReductionOperation.Value.Value) {
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| 89 | case ReductionOperations.Sum:
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[8331] | 90 | result = values.Sum();
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[7395] | 91 | break;
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[8331] | 92 | case ReductionOperations.Product:
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| 93 | result = values.Aggregate(1, (x, y) => x * y);
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[7395] | 94 | break;
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[8331] | 95 | case ReductionOperations.Count:
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| 96 | result = values.Count();
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[7395] | 97 | break;
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| 98 | case ReductionOperations.Min:
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[8331] | 99 | result = values.Min();
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[7395] | 100 | break;
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| 101 | case ReductionOperations.Max:
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[8331] | 102 | result = values.Max();
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[7395] | 103 | break;
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[8331] | 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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[7395] | 110 | default:
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[8331] | 111 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as ReductionOperation for type: {1}.", ReductionOperation.Value.Value, targetType));
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[7395] | 112 | }
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| 113 |
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[8331] | 114 | IntValue target;
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[7395] | 115 | switch (TargetOperation.Value.Value) {
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| 116 | case ReductionOperations.Sum:
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[8331] | 117 | target = InitializeTarget<IntValue, int>(targetType, 0);
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[7395] | 118 | target.Value += result;
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| 119 | break;
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[8331] | 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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[7395] | 123 | break;
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[8331] | 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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[7395] | 140 | default:
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[8331] | 141 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as TargetOperation for type: {1}.", TargetOperation.Value.Value, targetType));
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[7395] | 142 | }
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| 143 | }
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[8331] | 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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[7395] | 148 | switch (ReductionOperation.Value.Value) {
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| 149 | case ReductionOperations.Sum:
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[8331] | 150 | result = values.Sum();
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[7395] | 151 | break;
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[8331] | 152 | case ReductionOperations.Product:
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| 153 | result = values.Aggregate(1.0, (x, y) => x * y);
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[7395] | 154 | break;
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[8331] | 155 | case ReductionOperations.Count:
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| 156 | result = values.Count();
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[7395] | 157 | break;
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| 158 | case ReductionOperations.Min:
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[8331] | 159 | result = values.Min();
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[7395] | 160 | break;
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| 161 | case ReductionOperations.Max:
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[8331] | 162 | result = values.Max();
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[7395] | 163 | break;
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[8331] | 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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[7395] | 170 | default:
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[8331] | 171 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as ReductionOperation for type: {1}.", ReductionOperation.Value.Value, targetType));
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[7395] | 172 | }
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| 173 |
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[8331] | 174 | DoubleValue target;
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[7395] | 175 | switch (TargetOperation.Value.Value) {
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| 176 | case ReductionOperations.Sum:
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[8331] | 177 | target = InitializeTarget<DoubleValue, double>(targetType, 0.0);
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[7395] | 178 | target.Value += result;
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| 179 | break;
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[8331] | 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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[7395] | 183 | break;
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[8331] | 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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[7395] | 200 | default:
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[8331] | 201 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as TargetOperation for type: {1}.", TargetOperation.Value.Value, targetType));
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[7395] | 202 | }
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| 203 | }
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[8331] | 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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[7395] | 208 | switch (ReductionOperation.Value.Value) {
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| 209 | case ReductionOperations.Sum:
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[8331] | 210 | result = values.Aggregate(new TimeSpan(), (x, y) => x + y);
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[7395] | 211 | break;
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| 212 | case ReductionOperations.Min:
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[8331] | 213 | result = values.Min();
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[7395] | 214 | break;
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| 215 | case ReductionOperations.Max:
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[8331] | 216 | result = values.Max();
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[7395] | 217 | break;
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[8331] | 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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[7395] | 224 | default:
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[8331] | 225 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as ReductionOperation for type: {1}.", ReductionOperation.Value.Value, targetType));
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[7395] | 226 | }
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| 227 |
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[8331] | 228 | TimeSpanValue target;
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[7395] | 229 | switch (TargetOperation.Value.Value) {
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[8331] | 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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[7395] | 246 | case ReductionOperations.Assign:
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[8331] | 247 | target = InitializeTarget<TimeSpanValue, TimeSpan>(targetType, new TimeSpan());
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[7395] | 248 | target.Value = result;
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| 249 | break;
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| 250 | default:
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[8331] | 251 | throw new InvalidOperationException(string.Format("Operation {0} is not supported as TargetOperation for type: {1}.", TargetOperation.Value.Value, targetType));
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[7395] | 252 | }
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| 253 | }
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[8331] | 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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[7395] | 269 | }
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| 270 | }
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