[3223] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2008 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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[3294] | 23 | using System.Linq;
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[3223] | 24 | using System.Collections.Generic;
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| 25 | using System.Text;
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[3376] | 26 | using HeuristicLab.Common;
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[3223] | 27 | using HeuristicLab.Core;
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| 28 | using System.Xml;
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| 29 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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[3244] | 30 | using HeuristicLab.Data;
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[3294] | 31 | using System.Diagnostics;
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[3462] | 32 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Symbols;
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[3223] | 33 |
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| 34 | namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding {
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| 35 | [StorableClass]
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[3252] | 36 | public class SymbolicExpressionTreeNode : ICloneable {
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| 37 | [Storable]
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[3541] | 38 | private IList<SymbolicExpressionTreeNode> subTrees;
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[3252] | 39 | [Storable]
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[3223] | 40 | private Symbol symbol;
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[3484] | 41 | public Symbol Symbol {
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| 42 | get { return symbol; }
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| 43 | protected set { symbol = value; }
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| 44 | }
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[3462] | 45 |
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| 46 | // parent relation is not persisted or cloned (will be set on AddSubtree or RemoveSubtree)
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[3369] | 47 | private SymbolicExpressionTreeNode parent;
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[3484] | 48 | internal SymbolicExpressionTreeNode Parent {
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| 49 | get { return parent; }
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| 50 | set { parent = value; }
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| 51 | }
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[3223] | 52 |
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[3486] | 53 | public SymbolicExpressionTreeNode() {
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| 54 | // don't allocate subtrees list here!
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| 55 | // because we don't want to allocate it in terminal nodes
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| 56 | }
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[3484] | 57 |
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| 58 | public SymbolicExpressionTreeNode(Symbol symbol) {
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[3338] | 59 | subTrees = new List<SymbolicExpressionTreeNode>();
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[3223] | 60 | this.symbol = symbol;
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| 61 | }
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| 62 |
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[3252] | 63 | // copy constructor
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| 64 | protected SymbolicExpressionTreeNode(SymbolicExpressionTreeNode original) {
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| 65 | symbol = original.symbol;
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[3294] | 66 | subTrees = new List<SymbolicExpressionTreeNode>();
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[3252] | 67 | foreach (var subtree in original.SubTrees) {
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[3369] | 68 | AddSubTree((SymbolicExpressionTreeNode)subtree.Clone());
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[3252] | 69 | }
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| 70 | }
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[3223] | 71 |
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[3486] | 72 | [StorableHook(HookType.AfterDeserialization)]
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| 73 | private void AfterDeserializationHook() {
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| 74 | foreach (var subtree in SubTrees) {
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| 75 | subtree.Parent = this;
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| 76 | }
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| 77 | }
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| 78 |
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[3244] | 79 | public virtual bool HasLocalParameters {
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[3223] | 80 | get { return false; }
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| 81 | }
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| 82 |
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| 83 | public virtual IList<SymbolicExpressionTreeNode> SubTrees {
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| 84 | get { return subTrees; }
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| 85 | }
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| 86 |
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[3369] | 87 | internal virtual ISymbolicExpressionGrammar Grammar {
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| 88 | get { return parent.Grammar; }
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| 89 | set { throw new NotSupportedException("Grammar can be set only for SymbolicExpressionTreeTopLevelNodes."); }
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| 90 | }
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| 91 |
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[3244] | 92 | public int GetSize() {
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[3223] | 93 | int size = 1;
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| 94 | foreach (SymbolicExpressionTreeNode tree in SubTrees) size += tree.GetSize();
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| 95 | return size;
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| 96 | }
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| 97 |
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[3244] | 98 | public int GetHeight() {
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[3223] | 99 | int maxHeight = 0;
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| 100 | foreach (SymbolicExpressionTreeNode tree in SubTrees) maxHeight = Math.Max(maxHeight, tree.GetHeight());
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| 101 | return maxHeight + 1;
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| 102 | }
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[3294] | 103 |
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[3338] | 104 | public virtual void ResetLocalParameters(IRandom random) { }
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| 105 | public virtual void ShakeLocalParameters(IRandom random, double shakingFactor) { }
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| 106 |
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| 107 | public virtual void AddSubTree(SymbolicExpressionTreeNode tree) {
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[3369] | 108 | subTrees.Add(tree);
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| 109 | tree.Parent = this;
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[3294] | 110 | }
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| 111 |
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[3338] | 112 | public virtual void InsertSubTree(int index, SymbolicExpressionTreeNode tree) {
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[3369] | 113 | subTrees.Insert(index, tree);
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| 114 | tree.Parent = this;
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[3294] | 115 | }
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| 116 |
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[3338] | 117 | public virtual void RemoveSubTree(int index) {
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[3369] | 118 | subTrees[index].Parent = null;
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| 119 | subTrees.RemoveAt(index);
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[3294] | 120 | }
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| 121 |
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[3338] | 122 | public IEnumerable<SymbolicExpressionTreeNode> IterateNodesPrefix() {
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| 123 | yield return this;
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[3486] | 124 | if (SubTrees != null) {
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| 125 | foreach (var subtree in SubTrees) {
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| 126 | foreach (var n in subtree.IterateNodesPrefix())
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| 127 | yield return n;
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| 128 | }
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[3338] | 129 | }
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[3294] | 130 | }
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| 131 |
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[3338] | 132 | public IEnumerable<SymbolicExpressionTreeNode> IterateNodesPostfix() {
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[3486] | 133 | if (SubTrees != null) {
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| 134 | foreach (var subtree in SubTrees) {
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| 135 | foreach (var n in subtree.IterateNodesPrefix())
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| 136 | yield return n;
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| 137 | }
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[3338] | 138 | }
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| 139 | yield return this;
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[3294] | 140 | }
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[3338] | 141 | public IEnumerable<Symbol> GetAllowedSymbols(int argumentIndex) {
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| 142 | return Grammar.Symbols.Where(s => Grammar.IsAllowedChild(Symbol, s, argumentIndex));
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[3294] | 143 | }
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[3338] | 144 | public int GetMinSubtreeCount() {
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| 145 | return Grammar.GetMinSubtreeCount(Symbol);
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[3223] | 146 | }
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[3338] | 147 | public int GetMaxSubtreeCount() {
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| 148 | return Grammar.GetMaxSubtreeCount(Symbol);
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[3223] | 149 | }
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| 150 |
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[3252] | 151 | #region ICloneable Members
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| 152 |
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| 153 | public virtual object Clone() {
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| 154 | return new SymbolicExpressionTreeNode(this);
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[3237] | 155 | }
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[3252] | 156 |
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| 157 | #endregion
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[3338] | 158 |
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[3442] | 159 | public override string ToString() {
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| 160 | return Symbol.Name;
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| 161 | }
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[3223] | 162 | }
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| 163 | }
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