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source: stable/HeuristicLab.Problems.Programmable/3.3/ProblemDefinitionScript.cs @ 15529

Last change on this file since 15529 was 15260, checked in by jkarder, 7 years ago

#2553: merged r15120 into stable

File size: 5.4 KB
RevLine 
[11484]1#region License Information
2/* HeuristicLab
[14186]3 * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
[11484]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
22using System;
23using System.Linq;
24using System.Reflection;
25using HeuristicLab.Common;
26using HeuristicLab.Core;
[11949]27using HeuristicLab.Optimization;
[11484]28using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
29using HeuristicLab.Scripting;
30
31namespace HeuristicLab.Problems.Programmable {
32  [Item("ProblemDefinitionScript", "Script that defines the parameter vector and evaluates the solution for a programmable problem.")]
33  [StorableClass]
[11739]34  public abstract class ProblemDefinitionScript : Script, IProblemDefinition {
[11484]35    protected bool SuppressEvents { get; set; }
36
37    [Storable]
38    private VariableStore variableStore;
39    public VariableStore VariableStore {
40      get { return variableStore; }
41    }
42
[11944]43    [Storable]
44    private bool codeChanged;
45
[11484]46    [StorableConstructor]
[11739]47    protected ProblemDefinitionScript(bool deserializing) : base(deserializing) { }
48    protected ProblemDefinitionScript(ProblemDefinitionScript original, Cloner cloner)
[11484]49      : base(original, cloner) {
50      variableStore = cloner.Clone(original.variableStore);
[11944]51      codeChanged = original.codeChanged;
[11484]52    }
[11753]53    protected ProblemDefinitionScript()
54      : base() {
[11484]55      variableStore = new VariableStore();
56    }
[13277]57    protected ProblemDefinitionScript(string code)
58      : base(code) {
59      variableStore = new VariableStore();
60    }
[11484]61
[11739]62    IEncoding IProblemDefinition.Encoding {
[11753]63      get { return CompiledProblemDefinition.Encoding; }
[11739]64    }
65
[11900]66    private readonly object compileLock = new object();
[11739]67    private volatile IProblemDefinition compiledProblemDefinition;
68    protected IProblemDefinition CompiledProblemDefinition {
[11484]69      get {
[11900]70        // double checked locking pattern
71        if (compiledProblemDefinition == null) {
72          lock (compileLock) {
73            if (compiledProblemDefinition == null) {
[11944]74              if (codeChanged) throw new ProblemDefinitionScriptException("The code has been changed, but was not recompiled.");
[11900]75              Compile(false);
76            }
77          }
78        }
[11739]79        return compiledProblemDefinition;
[11484]80      }
81    }
[15260]82    public dynamic Instance {
83      get { return compiledProblemDefinition; }
84    }
[11484]85
[11900]86    public sealed override Assembly Compile() {
87      return Compile(true);
88    }
89
[11944]90    private Assembly Compile(bool fireChanged) {
[11484]91      var assembly = base.Compile();
92      var types = assembly.GetTypes();
[11885]93      if (!types.Any(x => typeof(CompiledProblemDefinition).IsAssignableFrom(x)))
94        throw new ProblemDefinitionScriptException("The compiled code doesn't contain a problem definition." + Environment.NewLine + "The problem definition must be a subclass of CompiledProblemDefinition.");
95      if (types.Count(x => typeof(CompiledProblemDefinition).IsAssignableFrom(x)) > 1)
96        throw new ProblemDefinitionScriptException("The compiled code contains multiple problem definitions." + Environment.NewLine + "Only one subclass of CompiledProblemDefinition is allowed.");
97
98      CompiledProblemDefinition inst;
[11484]99      try {
[11885]100        inst = (CompiledProblemDefinition)Activator.CreateInstance(types.Single(x => typeof(CompiledProblemDefinition).IsAssignableFrom(x)));
101      } catch (Exception e) {
102        compiledProblemDefinition = null;
103        throw new ProblemDefinitionScriptException("Instantiating the problem definition failed." + Environment.NewLine + "Check your default constructor.", e);
104      }
105
106      try {
[11484]107        inst.vars = new Variables(VariableStore);
108        inst.Initialize();
[11885]109      } catch (Exception e) {
110        compiledProblemDefinition = null;
111        throw new ProblemDefinitionScriptException("Initializing the problem definition failed." + Environment.NewLine + "Check your Initialize() method.", e);
112      }
113
114      try {
[11900]115        compiledProblemDefinition = inst;
116        if (fireChanged) OnProblemDefinitionChanged();
[11880]117      } catch (Exception e) {
[11739]118        compiledProblemDefinition = null;
[11885]119        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);
[11739]120      }
[11885]121
[11944]122      codeChanged = false;
[11484]123      return assembly;
124    }
125
126    protected override void OnCodeChanged() {
127      base.OnCodeChanged();
[11739]128      compiledProblemDefinition = null;
[11944]129      codeChanged = true;
[11484]130    }
131
[11739]132    public event EventHandler ProblemDefinitionChanged;
133    protected virtual void OnProblemDefinitionChanged() {
134      var handler = ProblemDefinitionChanged;
[11484]135      if (handler != null) handler(this, EventArgs.Empty);
136    }
137  }
138}
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