1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2016 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 HeuristicLab.Collections;
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25 | using HeuristicLab.Common;
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26 | using HeuristicLab.Core;
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27 | using HeuristicLab.Parameters;
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28 | using HeuristicLab.Persistence;
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29 |
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30 | namespace HeuristicLab.Operators {
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31 | /// <summary>
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32 | /// A base class for operators which apply arbitrary many other operators of a specific type.
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33 | /// </summary>
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34 | [Item("MultiOperator", "A base class for operators which apply arbitrary many other operators of a specific type.")]
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35 | [StorableType("74649f75-ebe5-4d50-b2f9-c5339988b78d")]
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36 | public abstract class MultiOperator<T> : InstrumentedOperator, IMultiOperator<T> where T : class, IOperator {
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37 | private List<IValueParameter<T>> operatorParameters;
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38 | protected IEnumerable<IValueParameter<T>> OperatorParameters { get { return operatorParameters; } }
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39 |
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40 | [Storable]
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41 | private IItemList<T> operators;
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42 | public IItemList<T> Operators {
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43 | get { return operators; }
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44 | protected set {
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45 | if (operators != value) {
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46 | if (value == null) throw new ArgumentException();
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47 | DeregisterOperatorsEvents();
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48 | operators = value;
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49 | RegisterOperatorsEvents();
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50 | UpdateOperatorParameters();
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51 | }
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52 | }
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53 | }
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54 |
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55 | [StorableConstructor]
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56 | protected MultiOperator(StorableConstructorFlag deserializing) : base(deserializing) { }
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57 | protected MultiOperator(MultiOperator<T> original, Cloner cloner)
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58 | : base(original, cloner) {
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59 | this.operators = cloner.Clone<IItemList<T>>(original.operators);
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60 | Initialize();
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61 | }
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62 | public MultiOperator()
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63 | : base() {
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64 | this.operators = new ItemList<T>();
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65 | Initialize();
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66 | }
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67 |
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68 | [StorableHook(HookType.AfterDeserialization)]
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69 | private void AfterDeserialization() {
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70 | Initialize();
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71 | }
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72 |
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73 | private void Initialize() {
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74 | if (operators != null) RegisterOperatorsEvents();
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75 | operatorParameters = new List<IValueParameter<T>>();
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76 | for (int i = 0; i < Operators.Count; i++) {
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77 | IValueParameter<T> opParam = (IValueParameter<T>)Parameters[i.ToString()];
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78 | operatorParameters.Add(opParam);
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79 | opParam.ValueChanged += new EventHandler(opParam_ValueChanged);
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80 | }
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81 | }
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82 |
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83 | private void UpdateOperatorParameters() {
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84 | foreach (IValueParameter<T> opParam in operatorParameters) {
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85 | opParam.ValueChanged -= new EventHandler(opParam_ValueChanged);
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86 | Parameters.Remove(opParam.Name);
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87 | }
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88 | operatorParameters.Clear();
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89 | for (int i = 0; i < Operators.Count; i++) {
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90 | IValueParameter<T> opParam = new OptionalValueParameter<T>(i.ToString(), string.Empty, Operators[i]);
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91 | opParam.Hidden = true;
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92 | opParam.ValueChanged += new EventHandler(opParam_ValueChanged);
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93 | Parameters.Add(opParam);
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94 | operatorParameters.Add(opParam);
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95 | }
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96 | }
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97 |
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98 | #region Events
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99 | private void RegisterOperatorsEvents() {
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100 | operators.ItemsAdded += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsAdded);
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101 | operators.ItemsRemoved += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsRemoved);
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102 | operators.ItemsReplaced += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsReplaced);
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103 | operators.ItemsMoved += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsMoved);
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104 | operators.CollectionReset += new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_CollectionReset);
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105 | }
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106 | private void DeregisterOperatorsEvents() {
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107 | operators.ItemsAdded -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsAdded);
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108 | operators.ItemsRemoved -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsRemoved);
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109 | operators.ItemsReplaced -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsReplaced);
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110 | operators.ItemsMoved -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_ItemsMoved);
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111 | operators.CollectionReset -= new CollectionItemsChangedEventHandler<IndexedItem<T>>(Operators_CollectionReset);
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112 | }
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113 | protected virtual void Operators_ItemsAdded(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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114 | UpdateOperatorParameters();
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115 | }
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116 | protected virtual void Operators_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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117 | UpdateOperatorParameters();
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118 | }
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119 | protected virtual void Operators_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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120 | foreach (IndexedItem<T> item in e.Items)
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121 | operatorParameters[item.Index].Value = item.Value;
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122 | }
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123 | protected virtual void Operators_ItemsMoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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124 | foreach (IndexedItem<T> item in e.Items)
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125 | operatorParameters[item.Index].Value = item.Value;
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126 | }
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127 | protected virtual void Operators_CollectionReset(object sender, CollectionItemsChangedEventArgs<IndexedItem<T>> e) {
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128 | UpdateOperatorParameters();
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129 | }
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130 | private void opParam_ValueChanged(object sender, EventArgs e) {
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131 | IValueParameter<T> opParam = (IValueParameter<T>)sender;
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132 | if (opParam.Value == null)
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133 | operators.RemoveAt(operatorParameters.IndexOf(opParam));
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134 | else
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135 | operators[operatorParameters.IndexOf(opParam)] = opParam.Value;
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136 | }
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137 | #endregion
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138 | }
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139 | }
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