1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2015 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 HeuristicLab.Common;
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23 | using HeuristicLab.Core;
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24 | using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
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25 | using HeuristicLab.Operators;
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26 | using HeuristicLab.Parameters;
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27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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28 |
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29 | namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
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30 | [Item("SymbolicExpressionTreeSimplificationOperator", "Simplifies symbolic expression trees encoding a mathematical formula.")]
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31 | [StorableClass("A3F1B8D7-0D13-46C6-B2ED-F92D089510D0")]
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32 | public class SymbolicDataAnalysisExpressionTreeSimplificationOperator : SingleSuccessorOperator, ISymbolicExpressionTreeOperator {
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33 | private const string SymbolicExpressionTreeParameterName = "SymbolicExpressionTree";
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34 |
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35 | public ILookupParameter<ISymbolicExpressionTree> SymbolicExpressionTreeParameter {
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36 | get { return (ILookupParameter<ISymbolicExpressionTree>)Parameters[SymbolicExpressionTreeParameterName]; }
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37 | }
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38 |
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39 | private readonly SymbolicDataAnalysisExpressionTreeSimplifier simplifier = new SymbolicDataAnalysisExpressionTreeSimplifier();
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40 |
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41 | [StorableConstructor]
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42 | protected SymbolicDataAnalysisExpressionTreeSimplificationOperator(bool deserializing) : base(deserializing) { }
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43 | protected SymbolicDataAnalysisExpressionTreeSimplificationOperator(SymbolicDataAnalysisExpressionTreeSimplificationOperator original, Cloner cloner)
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44 | : base(original, cloner) { }
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45 | public override IDeepCloneable Clone(Cloner cloner) {
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46 | return new SymbolicDataAnalysisExpressionTreeSimplificationOperator(this, cloner);
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47 | }
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48 |
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49 | public SymbolicDataAnalysisExpressionTreeSimplificationOperator() {
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50 | Parameters.Add(new LookupParameter<ISymbolicExpressionTree>(SymbolicExpressionTreeParameterName, "The symbolic expression tree to simplify."));
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51 | }
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52 |
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53 | public override IOperation Apply() {
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54 | var tree = SymbolicExpressionTreeParameter.ActualValue;
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55 | var simplifiedTree = simplifier.Simplify(tree);
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56 | simplifiedTree = simplifier.Simplify(simplifiedTree);
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57 | SymbolicExpressionTreeParameter.ActualValue = simplifiedTree;
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58 |
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59 | return base.Apply();
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60 | }
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61 | }
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62 | }
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