[266] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2008 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 System;
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[260] | 23 | using System.Collections.Generic;
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| 24 | using System.Linq;
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| 25 | using System.Text;
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| 26 | using HeuristicLab.Core;
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| 27 | using System.Xml;
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| 28 |
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| 29 | namespace HeuristicLab.Functions {
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| 30 | class EvaluatorSymbolTable : StorableBase{
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| 31 | public const int ADDITION = 10010;
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| 32 | public const int AND = 10020;
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| 33 | public const int AVERAGE = 10030;
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| 34 | public const int CONSTANT = 10040;
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| 35 | public const int COSINUS = 10050;
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| 36 | public const int DIVISION = 10060;
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| 37 | public const int EQU = 10070;
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| 38 | public const int EXP = 10080;
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| 39 | public const int GT = 10090;
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| 40 | public const int IFTE = 10100;
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| 41 | public const int LT = 10110;
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| 42 | public const int LOG = 10120;
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| 43 | public const int MULTIPLICATION = 10130;
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| 44 | public const int NOT = 10140;
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| 45 | public const int OR = 10150;
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| 46 | public const int POWER = 10160;
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| 47 | public const int SIGNUM = 10170;
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| 48 | public const int SINUS = 10180;
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| 49 | public const int SQRT = 10190;
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[308] | 50 | public const int SUBTRACTION = 10200;
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[260] | 51 | public const int TANGENS = 10210;
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| 52 | public const int VARIABLE = 10220;
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| 53 | public const int XOR = 10230;
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| 54 |
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| 55 | private int nextFunctionSymbol = 10240;
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| 56 | private Dictionary<int, IFunction> table;
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| 57 | private Dictionary<IFunction, int> reverseTable;
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| 58 | private Dictionary<Type, int> staticTypes;
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| 59 |
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| 60 | private static EvaluatorSymbolTable symbolTable = new EvaluatorSymbolTable();
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| 61 | public static EvaluatorSymbolTable SymbolTable {
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| 62 | get { return EvaluatorSymbolTable.symbolTable; }
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| 63 | }
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| 64 |
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| 65 | // needs to be public for persistence mechanism (Activator.CreateInstance needs empty constructor)
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| 66 | public EvaluatorSymbolTable () {
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| 67 | table = new Dictionary<int, IFunction>();
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| 68 | reverseTable = new Dictionary<IFunction, int>();
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| 69 | staticTypes = new Dictionary<Type, int>();
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| 70 | staticTypes[typeof(Addition)] = ADDITION;
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| 71 | staticTypes[typeof(And)] = AND;
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| 72 | staticTypes[typeof(Average)] = AVERAGE;
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| 73 | staticTypes[typeof(Constant)] = CONSTANT;
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| 74 | staticTypes[typeof(Cosinus)] = COSINUS;
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| 75 | staticTypes[typeof(Division)] = DIVISION;
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| 76 | staticTypes[typeof(Equal)] = EQU;
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| 77 | staticTypes[typeof(Exponential)] = EXP;
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| 78 | staticTypes[typeof(GreaterThan)] = GT;
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| 79 | staticTypes[typeof(IfThenElse)] = IFTE;
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| 80 | staticTypes[typeof(LessThan)] = LT;
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| 81 | staticTypes[typeof(Logarithm)] = LOG;
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| 82 | staticTypes[typeof(Multiplication)] = MULTIPLICATION;
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| 83 | staticTypes[typeof(Not)] = NOT;
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| 84 | staticTypes[typeof(Or)] = OR;
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| 85 | staticTypes[typeof(Power)] = POWER;
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| 86 | staticTypes[typeof(Signum)] = SIGNUM;
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| 87 | staticTypes[typeof(Sinus)] = SINUS;
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| 88 | staticTypes[typeof(Sqrt)] = SQRT;
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[308] | 89 | staticTypes[typeof(Subtraction)] = SUBTRACTION;
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[260] | 90 | staticTypes[typeof(Tangens)] = TANGENS;
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| 91 | staticTypes[typeof(Variable)] = VARIABLE;
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| 92 | staticTypes[typeof(Xor)] = XOR;
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| 93 | }
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| 94 |
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| 95 | internal int MapFunction(IFunction function) {
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| 96 | if(!reverseTable.ContainsKey(function)) {
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| 97 | int curFunctionSymbol;
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| 98 | if(staticTypes.ContainsKey(function.GetType())) curFunctionSymbol = staticTypes[function.GetType()];
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| 99 | else {
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| 100 | curFunctionSymbol = nextFunctionSymbol;
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| 101 | nextFunctionSymbol++;
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| 102 | }
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| 103 | reverseTable[function] = curFunctionSymbol;
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| 104 | table[curFunctionSymbol] = function;
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| 105 | }
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| 106 | return reverseTable[function];
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| 107 | }
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| 108 |
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| 109 | internal IFunction MapSymbol(int symbol) {
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| 110 | return table[symbol];
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| 111 | }
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| 112 |
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| 113 | public override XmlNode GetXmlNode(string name, XmlDocument document, IDictionary<Guid, IStorable> persistedObjects) {
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| 114 | XmlNode node = base.GetXmlNode(name, document, persistedObjects);
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| 115 | XmlAttribute nextFunctionSymbolAttribute = document.CreateAttribute("NextFunctionSymbol");
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| 116 | nextFunctionSymbolAttribute.Value = nextFunctionSymbol.ToString();
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| 117 | node.Attributes.Append(nextFunctionSymbolAttribute);
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| 118 | XmlNode symbolTableNode = document.CreateNode(XmlNodeType.Element, "Table", null);
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| 119 | foreach(KeyValuePair<int, IFunction> entry in table) {
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| 120 | XmlNode entryNode = PersistenceManager.Persist("Entry", entry.Value, document, persistedObjects);
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| 121 | XmlAttribute symbolAttr = document.CreateAttribute("Symbol");
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| 122 | symbolAttr.Value = entry.Key.ToString();
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| 123 | entryNode.Attributes.Append(symbolAttr);
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| 124 | symbolTableNode.AppendChild(entryNode);
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| 125 | }
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| 126 | node.AppendChild(symbolTableNode);
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| 127 | return node;
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| 128 | }
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| 129 |
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| 130 | public override void Populate(XmlNode node, IDictionary<Guid, IStorable> restoredObjects) {
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[309] | 131 | if(this == symbolTable) {
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| 132 | base.Populate(node, restoredObjects);
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| 133 | table.Clear();
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| 134 | reverseTable.Clear();
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| 135 | nextFunctionSymbol = int.Parse(node.Attributes["NextFunctionSymbol"].Value);
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| 136 | XmlNode symbolTableNode = node.SelectSingleNode("Table");
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| 137 | foreach(XmlNode entry in symbolTableNode.ChildNodes) {
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| 138 | IFunction function = (IFunction)PersistenceManager.Restore(entry, restoredObjects);
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| 139 | int symbol = int.Parse(entry.Attributes["Symbol"].Value);
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| 140 | table[symbol] = function;
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| 141 | reverseTable[function] = symbol;
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| 142 | }
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| 143 | } else {
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| 144 | symbolTable.Populate(node, restoredObjects);
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[260] | 145 | }
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| 146 | }
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| 147 | }
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| 148 | }
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