#region License Information /* HeuristicLab * Copyright (C) 2002-2010 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.Core; using HeuristicLab.Data; using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding.Interfaces; using HeuristicLab.Operators; using HeuristicLab.Optimization; using HeuristicLab.Parameters; using HeuristicLab.Persistence.Default.CompositeSerializers.Storable; namespace HeuristicLab.Encodings.SymbolicExpressionTreeEncoding { /// /// A base class for operators for symbolic expression trees. /// [Item("SymbolicExpressionTreeOperator", "A base class for operators for symbolic expression trees.")] [StorableClass] public abstract class SymbolicExpressionTreeOperator : SingleSuccessorOperator, IStochasticOperator, ISymbolicExpressionTreeOperator { private const string RandomParameterName = "Random"; private const string MaxTreeSizeParameterName = "MaxTreeSize"; private const string MaxTreeHeightParameterName = "MaxTreeHeight"; private const string SymbolicExpressionGrammarParameterName = "SymbolicExpressionGrammar"; public override bool CanChangeName { get { return false; } } #region Parameter Properties public ILookupParameter RandomParameter { get { return (LookupParameter)Parameters[RandomParameterName]; } } public IValueLookupParameter MaxTreeSizeParameter { get { return (IValueLookupParameter)Parameters[MaxTreeSizeParameterName]; } } public IValueLookupParameter MaxTreeHeightParameter { get { return (IValueLookupParameter)Parameters[MaxTreeHeightParameterName]; } } public ILookupParameter SymbolicExpressionGrammarParameter { get { return (ILookupParameter)Parameters[SymbolicExpressionGrammarParameterName]; } } #endregion #region Properties public IRandom Random { get { return RandomParameter.ActualValue; } } public IntValue MaxTreeSize { get { return MaxTreeSizeParameter.ActualValue; } } public IntValue MaxTreeHeight { get { return MaxTreeHeightParameter.ActualValue; } } public ISymbolicExpressionGrammar SymbolicExpressionGrammar { get { return SymbolicExpressionGrammarParameter.ActualValue; } } #endregion protected SymbolicExpressionTreeOperator() : base() { Parameters.Add(new LookupParameter(RandomParameterName, "The pseudo random number generator which should be used for symbolic expression tree operators.")); Parameters.Add(new ValueLookupParameter(MaxTreeSizeParameterName, "The maximal size (number of nodes) of the symbolic expression tree.")); Parameters.Add(new ValueLookupParameter(MaxTreeHeightParameterName, "The maximal height of the symbolic expression tree (a tree with one node has height = 0).")); Parameters.Add(new LookupParameter(SymbolicExpressionGrammarParameterName, "The grammar that defines the allowed symbols and syntax of the symbolic expression trees.")); } } }