source: branches/2931_OR-Tools_LP_MIP/HeuristicLab.MathematicalOptimization/3.3/LinearProgramming/Algorithms/Solvers/ScipSolver.cs @ 16405

Last change on this file since 16405 was 16405, checked in by ddorfmei, 3 months ago

#2931:

  • moved views to separate plugin HeuristicLab.MathematicalOptimization.Views
  • added button in LinearProgrammingProblemView to select the problem definition type
  • added views for problem definitions
  • added ExportFile parameter to LinearProgrammingAlgorithm
  • extended FileValue and FileValueView by the option to save a file
  • code cleanup
File size: 2.8 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 System;
23using System.Threading;
24using HeuristicLab.Common;
25using HeuristicLab.Core;
26using HeuristicLab.Data;
27using HeuristicLab.Optimization;
28using HeuristicLab.Parameters;
29using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
30
31namespace HeuristicLab.MathematicalOptimization.LinearProgramming {
32
33  [Item("SCIP", "SCIP (http://scip.zib.de/) must be installed and licenced.")]
34  [StorableClass]
35  public class ScipSolver : ExternalIncrementalLinearSolver {
36    private TimeSpan timeLimit = TimeSpan.Zero;
37
38    public ScipSolver() {
39      Parameters.Add(libraryNameParam = new FixedValueParameter<FileValue>(nameof(LibraryName),
40        new FileValue { FileDialogFilter = FileDialogFilter, Value = Properties.Settings.Default.ScipLibraryName }));
41      problemTypeParam.Value =
42        (EnumValue<ProblemType>)new EnumValue<ProblemType>(ProblemType.MixedIntegerProgramming).AsReadOnly();
43      SolverSpecificParameters =
44        "# for file format and parameters, see https://scip.zib.de/doc/html/PARAMETERS.php" + Environment.NewLine +
45        "# example:" + Environment.NewLine +
46        "# branching/random/seed = 10" + Environment.NewLine;
47    }
48
49    [StorableConstructor]
50    protected ScipSolver(bool deserializing)
51      : base(deserializing) {
52    }
53
54    protected ScipSolver(ScipSolver original, Cloner cloner)
55      : base(original, cloner) {
56    }
57
58    protected override TimeSpan IntermediateTimeLimit => timeLimit += QualityUpdateInterval;
59
60    protected override OptimizationProblemType OptimizationProblemType =>
61          OptimizationProblemType.ScipMixedIntegerProgramming;
62
63    public override void Solve(ILinearProgrammingProblemDefinition problemDefintion, ref TimeSpan executionTime, ResultCollection results, CancellationToken cancellationToken) {
64      timeLimit = TimeSpan.Zero;
65      base.Solve(problemDefintion, ref executionTime, results, cancellationToken);
66    }
67  }
68}
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