#region License Information /* HeuristicLab * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL) * * This file is part of HeuristicLab. * * HeuristicLab is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * HeuristicLab is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with HeuristicLab. If not, see . */ #endregion using HeuristicLab.Common; using HeuristicLab.Core; using HeuristicLab.Parameters; using HeuristicLab.Persistence.Default.CompositeSerializers.Storable; namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding { /// /// A base class for operators creating symbolic expression trees. /// [Item("TracingSymbolicExpressionTreeCreator", "A base class for operators creating symbolic expression trees.")] [StorableClass] public abstract class TracingSymbolicExpressionTreeCreator : SymbolicExpressionTreeOperator, ISymbolicExpressionTreeCreator { private const string SymbolicExpressionTreeParameterName = "SymbolicExpressionTree"; private const string GlobalTreeCacheParameterName = "GlobalTreeCache"; #region Parameter Properties public ILookupParameter SymbolicExpressionTreeParameter { get { return (ILookupParameter)Parameters[SymbolicExpressionTreeParameterName]; } } #endregion #region Properties public ISymbolicExpressionTree SymbolicExpressionTree { get { return SymbolicExpressionTreeParameter.ActualValue; } set { SymbolicExpressionTreeParameter.ActualValue = value; } } #endregion [StorableConstructor] protected TracingSymbolicExpressionTreeCreator(bool deserializing) : base(deserializing) { } protected TracingSymbolicExpressionTreeCreator(TracingSymbolicExpressionTreeCreator original, Cloner cloner) : base(original, cloner) { } protected TracingSymbolicExpressionTreeCreator() : base() { Parameters.Add(new LookupParameter(SymbolicExpressionTreeParameterName, "The symbolic expression tree that should be created.")); Parameters.Add(new LookupParameter>(GlobalTreeCacheParameterName, "The global cache for storing the trees")); //globalScope.Variables.Add(new Variable(GlobalOperatorCacheParameterName, new ItemList())); } public override IOperation Apply() { SymbolicExpressionTree = Create(Random); // add tree to the global tree cache AddTreeToGlobalCache(); return base.Apply(); } private void AddTreeToGlobalCache() { var globalScope = ExecutionContext.Scope; while (globalScope.Parent != null) globalScope = globalScope.Parent; Variable globalTreeCache; if (!globalScope.Variables.ContainsKey(GlobalTreeCacheParameterName)) { globalTreeCache = new Variable(GlobalTreeCacheParameterName, new ItemList()); globalScope.Variables.Add(globalTreeCache); } else globalTreeCache = (Variable)globalScope.Variables[GlobalTreeCacheParameterName]; var trees = (ItemList)globalTreeCache.Value; trees.Add(SymbolicExpressionTree); } protected abstract ISymbolicExpressionTree Create(IRandom random); public abstract ISymbolicExpressionTree CreateTree(IRandom random, ISymbolicExpressionGrammar grammar, int maxTreeLength, int maxTreeDepth); } }