#region License Information
/* HeuristicLab
* Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
*
* This file is part of HeuristicLab.
*
* HeuristicLab is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* HeuristicLab is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with HeuristicLab. If not, see .
*/
#endregion
using System.Drawing;
using System.IO;
using Google.OrTools.LinearSolver;
using HeuristicLab.Common;
using HeuristicLab.Common.Resources;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Optimization;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
namespace HeuristicLab.MathematicalOptimization.LinearProgramming {
[Item("File-Based Linear/Mixed Integer Programming Problem Definition", "File that defines the model for linear/mixed integer programming problem.")]
[StorableClass]
public sealed class FileBasedLinearProgrammingProblemDefinition : ParameterizedNamedItem, ILinearProgrammingProblemDefinition {
[Storable]
private readonly IFixedValueParameter fileNameParam;
[Storable]
private byte[] fileContent;
public FileBasedLinearProgrammingProblemDefinition() {
Parameters.Add(fileNameParam = new FixedValueParameter(nameof(FileName), new FileValue()));
fileNameParam.Value.FileDialogFilter =
"All Supported Files (*.mps;*.bin;*.prototxt)|*.mps;*.bin;*.prototxt|" +
"Mathematical Programming System Files (*.mps)|*.mps|" +
"Google OR-Tools Protocol Buffers Files (*.bin;*.prototxt)|*.bin;*.prototxt|" +
"All Files (*.*)|*.*";
fileNameParam.Value.PathChanged += (o, e) => {
if (File.Exists(FileName)) {
fileContent = File.ReadAllBytes(FileName);
}
};
}
private FileBasedLinearProgrammingProblemDefinition(FileBasedLinearProgrammingProblemDefinition original, Cloner cloner)
: base(original, cloner) {
fileNameParam = cloner.Clone(original.fileNameParam);
}
[StorableConstructor]
private FileBasedLinearProgrammingProblemDefinition(bool deserializing) : base(deserializing) { }
public new static Image StaticItemImage => VSImageLibrary.File;
public string FileName {
get => fileNameParam.Value.Value;
set => fileNameParam.Value.Value = value;
}
public IFixedValueParameter FileNameParam => fileNameParam;
public void Analyze(Solver solver, ResultCollection results) {
}
public void BuildModel(Solver solver) {
var fileInfo = new FileInfo(FileName);
var tempFileName = Path.GetTempFileName();
File.WriteAllBytes(tempFileName, fileContent);
var status = (SolverResponseStatus)(fileInfo.Extension == ".mps"
? solver.ImportModelFromMpsFormat(tempFileName)
: solver.ImportModelFromProtoFormat(tempFileName));
if (status == SolverResponseStatus.Abnormal)
throw new FileFormatException($"'{FileName}' is not a valid MPS or Google OR-Tools Protocol Buffers file.");
File.Delete(tempFileName);
}
public override IDeepCloneable Clone(Cloner cloner) => new FileBasedLinearProgrammingProblemDefinition(this, cloner);
}
}