#region License Information /* HeuristicLab * Copyright (C) 2002-2016 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.Encodings.SymbolicExpressionTreeEncoding; using HeuristicLab.Operators; using HeuristicLab.Parameters; using HeuristicLab.Persistence; namespace HeuristicLab.Problems.DataAnalysis.Symbolic { [Item("SymbolicExpressionTreeSimplificationOperator", "Simplifies symbolic expression trees encoding a mathematical formula.")] [StorableType("4f49c5b1-13b4-4ce9-b954-8c1dd695a7f9")] public class SymbolicDataAnalysisExpressionTreeSimplificationOperator : SingleSuccessorOperator, ISymbolicExpressionTreeOperator { private const string SymbolicExpressionTreeParameterName = "SymbolicExpressionTree"; public ILookupParameter SymbolicExpressionTreeParameter { get { return (ILookupParameter)Parameters[SymbolicExpressionTreeParameterName]; } } private readonly TreeSimplifier simplifier = new TreeSimplifier(); [StorableConstructor] protected SymbolicDataAnalysisExpressionTreeSimplificationOperator(bool deserializing) : base(deserializing) { } protected SymbolicDataAnalysisExpressionTreeSimplificationOperator(SymbolicDataAnalysisExpressionTreeSimplificationOperator original, Cloner cloner) : base(original, cloner) { } public override IDeepCloneable Clone(Cloner cloner) { return new SymbolicDataAnalysisExpressionTreeSimplificationOperator(this, cloner); } public SymbolicDataAnalysisExpressionTreeSimplificationOperator() { Parameters.Add(new LookupParameter(SymbolicExpressionTreeParameterName, "The symbolic expression tree to simplify.")); } public override IOperation Apply() { var tree = SymbolicExpressionTreeParameter.ActualValue; var simplifiedTree = simplifier.Simplify(tree); simplifiedTree = simplifier.Simplify(simplifiedTree); SymbolicExpressionTreeParameter.ActualValue = simplifiedTree; return base.Apply(); } } }