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source: stable/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/Formatters/SymbolicDataAnalysisExpressionSmalltalkFormatter.cs @ 12607

Last change on this file since 12607 was 12009, checked in by ascheibe, 10 years ago

#2212 updated copyright year

File size: 8.0 KB
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[4861]1#region License Information
2/* HeuristicLab
[12009]3 * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
[4861]4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
[9794]22using System.Globalization;
[4861]23using System.Text;
[9821]24using HeuristicLab.Common;
[4861]25using HeuristicLab.Core;
[9821]26using HeuristicLab.Encodings.SymbolicExpressionTreeEncoding;
[4861]27
[9821]28namespace HeuristicLab.Problems.DataAnalysis.Symbolic {
[4861]29
[9649]30  [Item("Smalltalk String Formatter", "String formatter for string representations of symbolic expression trees in Smalltalk syntax.")]
[9821]31  public class SymbolicDataAnalysisExpressionSmalltalkFormatter : NamedItem, ISymbolicExpressionTreeStringFormatter {
[4861]32
[9821]33    protected SymbolicDataAnalysisExpressionSmalltalkFormatter(SymbolicDataAnalysisExpressionSmalltalkFormatter original, Cloner cloner) : base(original, cloner) { }
34    public SymbolicDataAnalysisExpressionSmalltalkFormatter()
[9649]35      : base() {
[9821]36      Name = ItemName;
37      Description = ItemDescription;
[4861]38    }
39
[9649]40    public string Format(ISymbolicExpressionTree symbolicExpressionTree) {
[4861]41      return FormatRecursively(symbolicExpressionTree.Root);
42    }
43
[9794]44    // returns the smalltalk expression corresponding to the node
45    // smalltalk expressions are always surrounded by parantheses "(<expr>)"
[9649]46    private string FormatRecursively(ISymbolicExpressionTreeNode node) {
[4868]47
[9649]48      ISymbol symbol = node.Symbol;
[4868]49
50      if (symbol is ProgramRootSymbol || symbol is StartSymbol)
[9649]51        return FormatRecursively(node.GetSubtree(0));
[4868]52
[9794]53      StringBuilder stringBuilder = new StringBuilder(20);
[4861]54
[4868]55      stringBuilder.Append("(");
56
[4861]57      if (symbol is Addition) {
[9649]58        for (int i = 0; i < node.SubtreeCount; i++) {
[4861]59          if (i > 0) stringBuilder.Append("+");
[9649]60          stringBuilder.Append(FormatRecursively(node.GetSubtree(i)));
[4861]61        }
62      } else if (symbol is And) {
[4868]63        stringBuilder.Append("(");
[9649]64        for (int i = 0; i < node.SubtreeCount; i++) {
[4861]65          if (i > 0) stringBuilder.Append("&");
[9794]66          stringBuilder.Append("(");
[9649]67          stringBuilder.Append(FormatRecursively(node.GetSubtree(i)));
[9794]68          stringBuilder.Append(" > 0)");
[4861]69        }
[4868]70        stringBuilder.Append(") ifTrue:[1] ifFalse:[-1]");
[4861]71      } else if (symbol is Average) {
72        stringBuilder.Append("(1/");
[9649]73        stringBuilder.Append(node.SubtreeCount);
[4861]74        stringBuilder.Append(")*(");
[9649]75        for (int i = 0; i < node.SubtreeCount; i++) {
[4861]76          if (i > 0) stringBuilder.Append("+");
[9649]77          stringBuilder.Append(FormatRecursively(node.GetSubtree(i)));
[4861]78        }
79        stringBuilder.Append(")");
80      } else if (symbol is Constant) {
81        ConstantTreeNode constantTreeNode = node as ConstantTreeNode;
[9794]82        stringBuilder.Append(constantTreeNode.Value.ToString(CultureInfo.InvariantCulture));
[4861]83      } else if (symbol is Cosine) {
[9649]84        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[4868]85        stringBuilder.Append(" cos");
[4861]86      } else if (symbol is Division) {
[9649]87        if (node.SubtreeCount == 1) {
[4868]88          stringBuilder.Append("1/");
[9649]89          stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[4868]90        } else {
[9649]91          stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[4868]92          stringBuilder.Append("/(");
[9649]93          for (int i = 1; i < node.SubtreeCount; i++) {
[4868]94            if (i > 1) stringBuilder.Append("*");
[9649]95            stringBuilder.Append(FormatRecursively(node.GetSubtree(i)));
[4868]96          }
[4861]97          stringBuilder.Append(")");
98        }
99      } else if (symbol is Exponential) {
[9649]100        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[4868]101        stringBuilder.Append(" exp");
[4861]102      } else if (symbol is GreaterThan) {
103        stringBuilder.Append("(");
[9649]104        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[4868]105        stringBuilder.Append(" > ");
[9649]106        stringBuilder.Append(FormatRecursively(node.GetSubtree(1)));
[4868]107        stringBuilder.Append(") ifTrue: [1] ifFalse: [-1]");
[4861]108      } else if (symbol is IfThenElse) {
109        stringBuilder.Append("(");
[9649]110        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[4868]111        stringBuilder.Append(" > 0) ifTrue: [");
[9649]112        stringBuilder.Append(FormatRecursively(node.GetSubtree(1)));
[4861]113        stringBuilder.Append("] ifFalse: [");
[9649]114        stringBuilder.Append(FormatRecursively(node.GetSubtree(2)));
[4869]115        stringBuilder.Append("]");
[4861]116      } else if (symbol is LaggedVariable) {
[9794]117        stringBuilder.Append("lagged variable not implemented");
[4861]118      } else if (symbol is LessThan) {
119        stringBuilder.Append("(");
[9649]120        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[4868]121        stringBuilder.Append(" < ");
[9649]122        stringBuilder.Append(FormatRecursively(node.GetSubtree(1)));
[4868]123        stringBuilder.Append(") ifTrue: [1] ifFalse: [-1]");
[4861]124      } else if (symbol is Logarithm) {
[9649]125        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[4868]126        stringBuilder.Append("ln");
[4861]127      } else if (symbol is Multiplication) {
[9649]128        for (int i = 0; i < node.SubtreeCount; i++) {
[4861]129          if (i > 0) stringBuilder.Append("*");
[9649]130          stringBuilder.Append(FormatRecursively(node.GetSubtree(i)));
[4861]131        }
132      } else if (symbol is Not) {
[9794]133        stringBuilder.Append("(");
[9649]134        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[9794]135        stringBuilder.Append(">0) ifTrue: [-1] ifFalse: [1.0]");
[4861]136      } else if (symbol is Or) {
[4868]137        stringBuilder.Append("(");
[9649]138        for (int i = 0; i < node.SubtreeCount; i++) {
[4861]139          if (i > 0) stringBuilder.Append("|");
[9794]140          stringBuilder.Append("(");
[9649]141          stringBuilder.Append(FormatRecursively(node.GetSubtree(i)));
[9794]142          stringBuilder.Append(">0)");
[4861]143        }
[4868]144        stringBuilder.Append(") ifTrue:[1] ifFalse:[-1]");
[4861]145      } else if (symbol is Sine) {
[9649]146        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[4868]147        stringBuilder.Append(" sin");
[4861]148      } else if (symbol is Subtraction) {
[9649]149        if (node.SubtreeCount == 1) {
[4869]150          stringBuilder.Append("-1*");
[9649]151          stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[4868]152        } else {
[9649]153          stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
154          for (int i = 1; i < node.SubtreeCount; i++) {
[9794]155            stringBuilder.Append(" - ");
[9649]156            stringBuilder.Append(FormatRecursively(node.GetSubtree(i)));
[4868]157          }
[4861]158        }
159      } else if (symbol is Tangent) {
[9649]160        stringBuilder.Append(FormatRecursively(node.GetSubtree(0)));
[9794]161        stringBuilder.Append(" tan");
[9649]162      } else if (symbol is Variable) {
[4868]163        VariableTreeNode variableTreeNode = node as VariableTreeNode;
[9794]164        stringBuilder.Append(variableTreeNode.Weight.ToString(CultureInfo.InvariantCulture));
[4868]165        stringBuilder.Append("*");
166        stringBuilder.Append(variableTreeNode.VariableName);
[9649]167      } else {
[9794]168        stringBuilder.Append("(");
169        for (int i = 0; i < node.SubtreeCount; i++) {
170          if (i > 0) stringBuilder.Append(", ");
171          stringBuilder.Append(FormatRecursively(node.GetSubtree(i)));
172        }
173        stringBuilder.AppendFormat(" {0} [Not Supported] )", node.Symbol.Name);
[4861]174      }
175
[4868]176      stringBuilder.Append(")");
177
[4861]178      return stringBuilder.ToString();
179    }
180
181    public override IDeepCloneable Clone(Cloner cloner) {
[9821]182      return new SymbolicDataAnalysisExpressionSmalltalkFormatter(this, cloner);
[4861]183    }
184  }
185}
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