source: branches/2931_OR-Tools_LP_MIP/HeuristicLab.MathematicalOptimization/3.3/LinearProgramming/Algorithms/Solvers/GlpkSolver.cs @ 16373

Last change on this file since 16373 was 16373, checked in by ddorfmei, 5 months ago

#2931:

  • upgraded Google OR-Tools to version 6.10
  • added TextValue and TextValueView to be able to display and edit a multiline string
  • added parameter to set solver specific parameters for supported solvers
  • added support for the Protocol Buffers representation of models (import/export)
  • added import of MPS models
  • added pause/stop functionality to CplexSolver and GlpkSolver
  • refactored wrapper (LinearSolver and related enums)
  • added new algorithm category Exact for LinearProgrammingAlgorithm
File size: 2.3 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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 HeuristicLab.Common;
23using HeuristicLab.Core;
24using HeuristicLab.Data;
25using HeuristicLab.MathematicalOptimization.LinearProgramming.Algorithms.Solvers.Base;
26using HeuristicLab.Parameters;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28
29namespace HeuristicLab.MathematicalOptimization.LinearProgramming.Algorithms.Solvers {
30
31  [Item("GLPK", "GLPK (https://www.gnu.org/software/glpk/) can be used out of the box.")]
32  [StorableClass]
33  public class GlpkSolver : ExternalIncrementalSolver {
34
35    public GlpkSolver() {
36      Parameters.Remove(solverSpecificParametersParam);
37      Parameters.Add(libraryNameParam = new FixedValueParameter<FileValue>(nameof(LibraryName),
38        new FileValue { FileDialogFilter = FileDialogFilter, Value = Properties.Settings.Default.GlpkLibraryName }));
39    }
40
41    protected GlpkSolver(GlpkSolver original, Cloner cloner)
42      : base(original, cloner) {
43    }
44
45    [StorableConstructor]
46    protected GlpkSolver(bool deserializing)
47      : base(deserializing) {
48    }
49
50    public override bool SupportsPause => ProblemType == ProblemType.LinearProgramming; // TODO: pause working for linear programs?
51
52    public override bool SupportsQualityUpdate => ProblemType == ProblemType.LinearProgramming;
53
54    protected override OptimizationProblemType OptimizationProblemType =>
55      ProblemType == ProblemType.LinearProgramming
56        ? OptimizationProblemType.GlpkLinearProgramming
57        : OptimizationProblemType.GlpkMixedIntegerProgramming;
58  }
59}
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