1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2014 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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23 | using System.Linq;
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24 | using System.Reflection;
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25 | using HeuristicLab.Common;
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26 | using HeuristicLab.Core;
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27 | using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
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28 | using HeuristicLab.Scripting;
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29 |
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30 | namespace HeuristicLab.Problems.Programmable {
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31 | [Item("ProblemDefinitionScript", "Script that defines the parameter vector and evaluates the solution for a programmable problem.")]
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32 | [StorableClass]
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33 | public abstract class ProblemDefinitionScript : Script, IProblemDefinition {
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34 | protected bool SuppressEvents { get; set; }
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35 |
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36 | [Storable]
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37 | private VariableStore variableStore;
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38 | public VariableStore VariableStore {
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39 | get { return variableStore; }
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40 | }
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41 |
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42 | [StorableConstructor]
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43 | protected ProblemDefinitionScript(bool deserializing) : base(deserializing) { }
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44 | protected ProblemDefinitionScript(ProblemDefinitionScript original, Cloner cloner)
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45 | : base(original, cloner) {
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46 | variableStore = cloner.Clone(original.variableStore);
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47 | }
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48 | protected ProblemDefinitionScript()
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49 | : base() {
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50 | variableStore = new VariableStore();
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51 | }
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52 |
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53 | IEncoding IProblemDefinition.Encoding {
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54 | get { return CompiledProblemDefinition.Encoding; }
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55 | }
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56 |
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57 | private readonly object locker = new object();
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58 | private volatile IProblemDefinition compiledProblemDefinition;
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59 | protected IProblemDefinition CompiledProblemDefinition {
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60 | get {
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61 | if (compiledProblemDefinition == null) throw new InvalidOperationException("The problem definition script is not compiled and cannot be used.");
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62 | return compiledProblemDefinition;
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63 | }
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64 | private set {
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65 | compiledProblemDefinition = value;
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66 | OnProblemDefinitionChanged();
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67 | }
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68 | }
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69 |
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70 | public override Assembly Compile() {
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71 | var assembly = base.Compile();
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72 | var types = assembly.GetTypes();
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73 | if (!types.Any(x => typeof(CompiledProblemDefinition).IsAssignableFrom(x)))
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74 | throw new ProblemDefinitionScriptException("The compiled code doesn't contain a problem definition." + Environment.NewLine + "The problem definition must be a subclass of CompiledProblemDefinition.");
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75 | if (types.Count(x => typeof(CompiledProblemDefinition).IsAssignableFrom(x)) > 1)
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76 | throw new ProblemDefinitionScriptException("The compiled code contains multiple problem definitions." + Environment.NewLine + "Only one subclass of CompiledProblemDefinition is allowed.");
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77 |
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78 | CompiledProblemDefinition inst;
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79 | try {
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80 | inst = (CompiledProblemDefinition)Activator.CreateInstance(types.Single(x => typeof(CompiledProblemDefinition).IsAssignableFrom(x)));
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81 | } catch (Exception e) {
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82 | compiledProblemDefinition = null;
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83 | throw new ProblemDefinitionScriptException("Instantiating the problem definition failed." + Environment.NewLine + "Check your default constructor.", e);
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84 | }
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85 |
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86 | try {
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87 | inst.vars = new Variables(VariableStore);
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88 | inst.Initialize();
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89 | } catch (Exception e) {
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90 | compiledProblemDefinition = null;
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91 | throw new ProblemDefinitionScriptException("Initializing the problem definition failed." + Environment.NewLine + "Check your Initialize() method.", e);
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92 | }
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93 |
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94 | try {
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95 | CompiledProblemDefinition = inst;
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96 | } catch (Exception e) {
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97 | compiledProblemDefinition = null;
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98 | throw new ProblemDefinitionScriptException("Using the problem definition in the problem failed." + Environment.NewLine + "Examine this error message carefully (often there is an issue with the defined encoding).", e);
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99 | }
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100 |
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101 | return assembly;
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102 | }
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103 |
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104 | protected override void OnCodeChanged() {
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105 | base.OnCodeChanged();
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106 | compiledProblemDefinition = null;
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107 | }
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108 |
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109 | public event EventHandler ProblemDefinitionChanged;
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110 | protected virtual void OnProblemDefinitionChanged() {
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111 | var handler = ProblemDefinitionChanged;
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112 | if (handler != null) handler(this, EventArgs.Empty);
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113 | }
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114 | }
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115 | }
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