[12196] | 1 | #region License Information
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| 2 |
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| 3 | /* HeuristicLab
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[14186] | 4 | * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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[12196] | 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.Generic;
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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.Optimization;
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[12316] | 31 | using HeuristicLab.Parameters;
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[12196] | 32 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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| 33 | using HeuristicLab.PluginInfrastructure;
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| 34 |
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| 35 | namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding {
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| 36 | [Item("SymbolicExpressionTreeEncoding", "Describes a symbolic expression tree encoding.")]
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| 37 | [StorableClass]
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[12319] | 38 | public sealed class SymbolicExpressionTreeEncoding : Encoding<ISymbolicExpressionTreeCreator> {
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[12196] | 39 | #region Encoding Parameters
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| 40 | [Storable]
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| 41 | private IFixedValueParameter<IntValue> treeLengthParameter;
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| 42 | public IFixedValueParameter<IntValue> TreeLengthParameter {
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| 43 | get { return treeLengthParameter; }
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| 44 | set {
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| 45 | if (value == null) throw new ArgumentNullException("Tree length parameter must not be null.");
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| 46 | if (value.Value == null) throw new ArgumentNullException("Tree length parameter value must not be null.");
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| 47 | if (treeLengthParameter == value) return;
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| 48 |
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| 49 | if (treeLengthParameter != null)
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| 50 | Parameters.Remove(treeLengthParameter);
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| 51 |
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| 52 | treeLengthParameter = value;
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| 53 | Parameters.Add(treeLengthParameter);
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[12266] | 54 | OnLengthParameterChanged();
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[12196] | 55 | }
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| 56 | }
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| 57 |
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| 58 | [Storable]
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| 59 | private IFixedValueParameter<IntValue> treeDepthParameter;
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| 60 | public IFixedValueParameter<IntValue> TreeDepthParameter {
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| 61 | get { return treeDepthParameter; }
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| 62 | set {
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| 63 | if (value == null) throw new ArgumentNullException("Tree length parameter must not be null.");
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| 64 | if (value.Value == null) throw new ArgumentNullException("Tree length parameter value must not be null.");
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| 65 | if (treeDepthParameter == value) return;
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| 66 |
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| 67 | if (treeDepthParameter != null)
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| 68 | Parameters.Remove(treeDepthParameter);
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| 69 |
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| 70 | treeDepthParameter = value;
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| 71 | Parameters.Add(treeDepthParameter);
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[12266] | 72 | OnDepthParameterChanged();
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[12196] | 73 | }
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| 74 | }
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[12316] | 75 |
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| 76 | [Storable]
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| 77 | private IValueParameter<ISymbolicExpressionGrammar> grammarParameter;
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| 78 | public IValueParameter<ISymbolicExpressionGrammar> GrammarParameter {
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| 79 | get { return grammarParameter; }
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| 80 | set {
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| 81 | if (value == null) throw new ArgumentNullException("Grammar parameter must not be null.");
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| 82 | if (value.Value == null) throw new ArgumentNullException("Grammar parameter value must not be null.");
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| 83 | if (grammarParameter == value) return;
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| 84 |
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| 85 | if (grammarParameter != null)
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| 86 | Parameters.Remove(grammarParameter);
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| 87 |
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| 88 | grammarParameter = value;
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| 89 | Parameters.Add(grammarParameter);
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| 90 | OnGrammarParameterChanged();
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| 91 | }
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| 92 | }
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| 93 |
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| 94 |
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| 95 | [Storable]
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| 96 | private IFixedValueParameter<IntValue> functionDefinitionsParameter;
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| 97 | public IFixedValueParameter<IntValue> FunctionDefinitionsParameter {
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| 98 | get { return functionDefinitionsParameter; }
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| 99 | set {
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| 100 | if (value == null) throw new ArgumentNullException("Function definitions parameter must not be null.");
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| 101 | if (value.Value == null) throw new ArgumentNullException("Function definitions parameter value must not be null.");
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| 102 | if (functionDefinitionsParameter == value) return;
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| 103 |
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| 104 | if (functionDefinitionsParameter != null)
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| 105 | Parameters.Remove(functionDefinitionsParameter);
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| 106 |
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| 107 | functionDefinitionsParameter = value;
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| 108 | Parameters.Add(functionDefinitionsParameter);
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| 109 | OnFunctionDefinitionsParameterChanged();
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| 110 | }
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| 111 | }
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| 112 |
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| 113 | [Storable]
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| 114 | private IFixedValueParameter<IntValue> functionArgumentsParameter;
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| 115 | public IFixedValueParameter<IntValue> FunctionArgumentsParameter {
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| 116 | get { return functionArgumentsParameter; }
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| 117 | set {
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| 118 | if (value == null) throw new ArgumentNullException("Function arguments parameter must not be null.");
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| 119 | if (value.Value == null) throw new ArgumentNullException("Function arguments parameter value must not be null.");
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| 120 | if (functionArgumentsParameter == value) return;
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| 121 |
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| 122 | if (functionArgumentsParameter != null)
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| 123 | Parameters.Remove(functionArgumentsParameter);
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| 124 |
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| 125 | functionArgumentsParameter = value;
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| 126 | Parameters.Add(functionArgumentsParameter);
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| 127 | OnFunctionArgumentsParameterChanged();
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| 128 | }
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| 129 | }
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[12196] | 130 | #endregion
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| 131 |
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[12316] | 132 | #region Parameter properties
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| 133 | public int TreeLength {
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| 134 | get { return TreeLengthParameter.Value.Value; }
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| 135 | set { TreeLengthParameter.Value.Value = value; }
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| 136 | }
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[12196] | 137 |
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[12316] | 138 | public int TreeDepth {
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| 139 | get { return TreeDepthParameter.Value.Value; }
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| 140 | set { TreeDepthParameter.Value.Value = value; }
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| 141 | }
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| 142 |
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| 143 | public ISymbolicExpressionGrammar Grammar {
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| 144 | get { return GrammarParameter.Value; }
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| 145 | set { GrammarParameter.Value = value; }
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| 146 | }
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| 147 |
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| 148 | public int FunctionDefinitions {
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| 149 | get { return FunctionDefinitionsParameter.Value.Value; }
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| 150 | set { FunctionDefinitionsParameter.Value.Value = value; }
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| 151 | }
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| 152 |
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| 153 | public int FunctionArguments {
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| 154 | get { return FunctionArgumentsParameter.Value.Value; }
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| 155 | set { FunctionArgumentsParameter.Value.Value = value; }
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| 156 | }
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| 157 | #endregion
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| 158 |
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[12196] | 159 | [StorableConstructor]
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[12319] | 160 | private SymbolicExpressionTreeEncoding(bool deserializing) : base(deserializing) { }
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[13630] | 161 | public SymbolicExpressionTreeEncoding() : this(new SimpleSymbolicExpressionGrammar()) { }
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[12319] | 162 | public SymbolicExpressionTreeEncoding(ISymbolicExpressionGrammar grammar) : this("SymbolicExpressionTree", grammar, 50, 50) { }
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| 163 | public SymbolicExpressionTreeEncoding(ISymbolicExpressionGrammar grammar, int maximumLength, int maximumDepth) : this("SymbolicExpressionTree", grammar, maximumLength, maximumDepth) { }
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| 164 | public SymbolicExpressionTreeEncoding(string name, ISymbolicExpressionGrammar grammar, int maximumLength, int maximumDepth)
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[12316] | 165 | : base(name) {
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[12334] | 166 | treeLengthParameter = new FixedValueParameter<IntValue>("Maximum Tree Length", "Maximal length of the symbolic expression.", new IntValue(maximumLength));
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[12319] | 167 | treeDepthParameter = new FixedValueParameter<IntValue>("Maximum Tree Depth", "Maximal depth of the symbolic expression. The minimum depth needed for the algorithm is 3 because two levels are reserved for the ProgramRoot and the Start symbol.", new IntValue(maximumDepth));
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| 168 | grammarParameter = new ValueParameter<ISymbolicExpressionGrammar>("Grammar", "The grammar that should be used for symbolic expression tree.", grammar);
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[12316] | 169 | functionDefinitionsParameter = new FixedValueParameter<IntValue>("Function Definitions", "Maximal number of automatically defined functions", new IntValue(0));
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| 170 | functionArgumentsParameter = new FixedValueParameter<IntValue>("Function Arguments", "Maximal number of arguments of automatically defined functions.", new IntValue(0));
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| 171 |
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| 172 | Parameters.Add(treeLengthParameter);
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| 173 | Parameters.Add(treeDepthParameter);
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| 174 | Parameters.Add(grammarParameter);
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| 175 | Parameters.Add(functionDefinitionsParameter);
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| 176 | Parameters.Add(functionArgumentsParameter);
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| 177 |
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| 178 | SolutionCreator = new ProbabilisticTreeCreator();
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| 179 | RegisterParameterEvents();
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| 180 | DiscoverOperators();
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| 181 | }
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| 182 |
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[12196] | 183 | private SymbolicExpressionTreeEncoding(SymbolicExpressionTreeEncoding original, Cloner cloner)
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| 184 | : base(original, cloner) {
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[12319] | 185 | treeLengthParameter = cloner.Clone(original.TreeLengthParameter);
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| 186 | treeDepthParameter = cloner.Clone(original.TreeDepthParameter);
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| 187 | grammarParameter = cloner.Clone(original.GrammarParameter);
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| 188 | functionDefinitionsParameter = cloner.Clone(original.FunctionDefinitionsParameter);
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| 189 | functionArgumentsParameter = cloner.Clone(original.FunctionArgumentsParameter);
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[12316] | 190 | RegisterParameterEvents();
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[12196] | 191 | }
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| 192 |
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| 193 | public override IDeepCloneable Clone(Cloner cloner) {
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| 194 | return new SymbolicExpressionTreeEncoding(this, cloner);
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| 195 | }
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| 196 |
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[12316] | 197 | #region changed events
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[12196] | 198 | private void OnLengthParameterChanged() {
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| 199 | RegisterLengthParameterEvents();
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| 200 | ConfigureOperators(Operators);
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| 201 | }
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| 202 | private void OnDepthParameterChanged() {
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| 203 | RegisterDepthParameterEvents();
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| 204 | ConfigureOperators(Operators);
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| 205 | }
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[12316] | 206 | private void OnGrammarParameterChanged() {
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| 207 | RegisterGrammarParameterEvents();
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[12319] | 208 | FunctionArguments = Grammar.MaximumFunctionArguments;
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| 209 | FunctionDefinitions = Grammar.MaximumFunctionDefinitions;
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[12316] | 210 | ConfigureOperators(Operators);
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| 211 | }
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[12196] | 212 |
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[12316] | 213 | private void OnFunctionDefinitionsParameterChanged() {
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| 214 | RegisterFunctionDefinitionsParameterEvents();
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| 215 | Grammar.MaximumFunctionDefinitions = FunctionDefinitions;
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| 216 | }
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| 217 |
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| 218 | private void OnFunctionArgumentsParameterChanged() {
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| 219 | RegisterFunctionArgumentsParameterEvetns();
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| 220 | Grammar.MaximumFunctionArguments = FunctionArguments;
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| 221 | }
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| 222 |
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| 223 | private void RegisterParameterEvents() {
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[12266] | 224 | RegisterLengthParameterEvents();
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| 225 | RegisterLengthParameterEvents();
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[12316] | 226 | RegisterGrammarParameterEvents();
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| 227 | RegisterFunctionDefinitionsParameterEvents();
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| 228 | RegisterFunctionArgumentsParameterEvetns();
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[12266] | 229 | }
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| 230 |
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[12316] | 231 |
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[12319] | 232 | private void RegisterLengthParameterEvents() { }
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| 233 | private void RegisterDepthParameterEvents() { }
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[12196] | 234 |
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[12316] | 235 | private void RegisterGrammarParameterEvents() {
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[12319] | 236 | GrammarParameter.ValueChanged += (o, s) => {
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| 237 | FunctionArguments = Grammar.MaximumFunctionArguments;
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| 238 | FunctionDefinitions = Grammar.MaximumFunctionDefinitions;
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| 239 | ConfigureOperators(Operators);
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| 240 | };
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| 241 | GrammarParameter.Value.Changed += (o, s) => {
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| 242 | FunctionArguments = Grammar.MaximumFunctionArguments;
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| 243 | FunctionDefinitions = Grammar.MaximumFunctionDefinitions;
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| 244 | ConfigureOperators(Operators);
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| 245 | };
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[12316] | 246 | }
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[12196] | 247 |
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[12316] | 248 | private void RegisterFunctionDefinitionsParameterEvents() {
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| 249 | FunctionDefinitionsParameter.Value.ValueChanged += (o, s) => Grammar.MaximumFunctionDefinitions = FunctionDefinitions;
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| 250 | }
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| 251 | private void RegisterFunctionArgumentsParameterEvetns() {
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| 252 | FunctionArgumentsParameter.Value.ValueChanged += (o, s) => Grammar.MaximumFunctionArguments = FunctionArguments;
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| 253 | }
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| 254 | #endregion
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| 255 |
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[12196] | 256 | #region Operator discovery
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| 257 | private static readonly IEnumerable<Type> encodingSpecificOperatorTypes;
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| 258 | static SymbolicExpressionTreeEncoding() {
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| 259 | encodingSpecificOperatorTypes = new List<Type>
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| 260 | {
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| 261 | typeof(ISymbolicExpressionTreeOperator),
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| 262 | typeof(ISymbolicExpressionTreeCreator),
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| 263 | typeof(ISymbolicExpressionTreeCrossover),
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[12316] | 264 | typeof(ISymbolicExpressionTreeManipulator),
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| 265 | typeof(ISymbolicExpressionTreeArchitectureAlteringOperator),
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| 266 | typeof(ISymbolicExpressionTreeAnalyzer),
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[12196] | 267 | };
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| 268 | }
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| 269 |
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| 270 | private void DiscoverOperators() {
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| 271 | var assembly = typeof(ISymbolicExpressionTreeOperator).Assembly;
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| 272 | var discoveredTypes = ApplicationManager.Manager.GetTypes(encodingSpecificOperatorTypes, assembly, true, false, false);
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| 273 | var operators = discoveredTypes.Select(t => (IOperator)Activator.CreateInstance(t));
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| 274 | var newOperators = operators.Except(Operators, new TypeEqualityComparer<IOperator>()).ToList();
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| 275 |
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| 276 | ConfigureOperators(newOperators);
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| 277 | foreach (var @operator in newOperators)
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| 278 | AddOperator(@operator);
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| 279 | }
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| 280 | #endregion
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| 281 |
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| 282 | #region Specific operator wiring
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[12266] | 283 |
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| 284 | public override void ConfigureOperators(IEnumerable<IOperator> operators) {
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[12316] | 285 | ConfigureTreeOperators(operators.OfType<ISymbolicExpressionTreeOperator>());
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| 286 | ConfigureSizeConstraintOperators(operators.OfType<ISymbolicExpressionTreeSizeConstraintOperator>());
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| 287 | ConfigureGrammarBaseOperators(operators.OfType<ISymbolicExpressionTreeGrammarBasedOperator>());
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| 288 | ConfigureArchitectureAlteringOperators(operators.OfType<ISymbolicExpressionTreeArchitectureAlteringOperator>());
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| 289 |
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| 290 | ConfigureAnalyzers(operators.OfType<ISymbolicExpressionTreeAnalyzer>());
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[12266] | 291 | ConfigureCreators(operators.OfType<ISymbolicExpressionTreeCreator>());
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| 292 | ConfigureCrossovers(operators.OfType<ISymbolicExpressionTreeCrossover>());
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| 293 | ConfigureManipulators(operators.OfType<ISymbolicExpressionTreeManipulator>());
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| 294 | }
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| 295 |
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[12316] | 296 | private void ConfigureTreeOperators(IEnumerable<ISymbolicExpressionTreeOperator> treeOperators) {
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| 297 | foreach (var treeOperator in treeOperators) {
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| 298 | treeOperator.SymbolicExpressionTreeParameter.ActualName = Name;
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| 299 | treeOperator.SymbolicExpressionTreeParameter.Hidden = true;
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[12196] | 300 | }
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| 301 | }
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| 302 |
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[12316] | 303 | private void ConfigureSizeConstraintOperators(IEnumerable<ISymbolicExpressionTreeSizeConstraintOperator> sizeConstraintOperators) {
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| 304 | foreach (var sizeConstraintOperator in sizeConstraintOperators) {
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| 305 | sizeConstraintOperator.MaximumSymbolicExpressionTreeLengthParameter.ActualName = TreeLengthParameter.Name;
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[12421] | 306 | sizeConstraintOperator.MaximumSymbolicExpressionTreeLengthParameter.Hidden = true;
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[12316] | 307 | sizeConstraintOperator.MaximumSymbolicExpressionTreeDepthParameter.ActualName = TreeDepthParameter.Name;
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[12421] | 308 | sizeConstraintOperator.MaximumSymbolicExpressionTreeDepthParameter.Hidden = true;
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[12316] | 309 | }
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| 310 | }
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| 311 |
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| 312 | private void ConfigureGrammarBaseOperators(IEnumerable<ISymbolicExpressionTreeGrammarBasedOperator> grammarBasedOperators) {
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| 313 | foreach (var grammarBasedOperator in grammarBasedOperators) {
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| 314 | grammarBasedOperator.SymbolicExpressionTreeGrammarParameter.ActualName = GrammarParameter.Name;
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[12421] | 315 | grammarBasedOperator.SymbolicExpressionTreeGrammarParameter.Hidden = true;
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[12316] | 316 | }
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| 317 | }
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| 318 |
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| 319 | private void ConfigureArchitectureAlteringOperators(IEnumerable<ISymbolicExpressionTreeArchitectureAlteringOperator> architectureAlteringOperators) {
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| 320 | foreach (var architectureAlteringOperator in architectureAlteringOperators) {
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| 321 | architectureAlteringOperator.MaximumFunctionDefinitionsParameter.ActualName = FunctionDefinitionsParameter.Name;
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[12421] | 322 | architectureAlteringOperator.MaximumFunctionDefinitionsParameter.Hidden = true;
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[12316] | 323 | architectureAlteringOperator.MaximumFunctionArgumentsParameter.ActualName = FunctionArgumentsParameter.Name;
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[12421] | 324 | architectureAlteringOperator.MaximumFunctionArgumentsParameter.Hidden = true;
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[12316] | 325 | }
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| 326 |
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| 327 | }
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| 328 |
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| 329 | private void ConfigureAnalyzers(IEnumerable<ISymbolicExpressionTreeAnalyzer> analyzers) {
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| 330 | foreach (var analyzer in analyzers) {
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| 331 | analyzer.SymbolicExpressionTreeParameter.ActualName = Name;
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[12421] | 332 | analyzer.SymbolicExpressionTreeParameter.Hidden = true;
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[12316] | 333 | }
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[12334] | 334 | foreach (var analyzer in analyzers.OfType<SymbolicExpressionTreeLengthAnalyzer>()) {
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| 335 | analyzer.MaximumSymbolicExpressionTreeLengthParameter.ActualName = TreeLengthParameter.Name;
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[12421] | 336 | analyzer.MaximumSymbolicExpressionTreeLengthParameter.Hidden = true;
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[12334] | 337 | }
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[12316] | 338 | }
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| 339 |
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| 340 | private void ConfigureCreators(IEnumerable<ISymbolicExpressionTreeCreator> creators) {
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| 341 | //Empty interface
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| 342 | foreach (var creator in creators) { }
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| 343 | }
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| 344 |
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[12196] | 345 | private void ConfigureCrossovers(IEnumerable<ISymbolicExpressionTreeCrossover> crossovers) {
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| 346 | foreach (var crossover in crossovers) {
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| 347 | crossover.ParentsParameter.ActualName = Name;
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[12421] | 348 | crossover.ParentsParameter.Hidden = true;
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[12196] | 349 | }
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| 350 | }
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| 351 |
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| 352 | private void ConfigureManipulators(IEnumerable<ISymbolicExpressionTreeManipulator> manipulators) {
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[12316] | 353 | //Empty interface
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| 354 | foreach (var manipulator in manipulators) { }
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[12196] | 355 | }
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| 356 | #endregion
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| 357 | }
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| 358 |
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| 359 | public static class IndividualExtensionMethods {
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| 360 | public static ISymbolicExpressionTree SymbolicExpressionTree(this Individual individual) {
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| 361 | var encoding = individual.GetEncoding<SymbolicExpressionTreeEncoding>();
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| 362 | return individual.SymbolicExpressionTree(encoding.Name);
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| 363 | }
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| 364 |
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| 365 | public static ISymbolicExpressionTree SymbolicExpressionTree(this Individual individual, string name) {
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| 366 | return (ISymbolicExpressionTree)individual[name];
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| 367 | }
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| 368 | }
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| 369 | }
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