Changeset 16405 for branches/2931_OR-Tools_LP_MIP/HeuristicLab.MathematicalOptimization/3.3/LinearProgramming/Problems/FileBasedLinearProgrammingProblemDefinition.cs

Timestamp:

12/19/18 14:15:49 (5 years ago)

Author:

ddorfmei

Message:

#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:

• branches/2931_OR-Tools_LP_MIP/HeuristicLab.MathematicalOptimization/3.3/LinearProgramming/Problems/FileBasedLinearProgrammingProblemDefinition.cs (moved) (moved from branches/2931_OR-Tools_LP_MIP/HeuristicLab.MathematicalOptimization/3.3/LinearProgramming/Problems/LinearProgrammingProblemDefintion.cs) (1 diff)

branches/2931_OR-Tools_LP_MIP/HeuristicLab.MathematicalOptimization/3.3/LinearProgramming/Problems/FileBasedLinearProgrammingProblemDefinition.cs

@@ -20 +20 @@
 #endregion
 
+using System.Drawing;
+using System.IO;
 using Google.OrTools.LinearSolver;
-using HeuristicLab.Problems.Programmable;
+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.Problems {
+namespace HeuristicLab.MathematicalOptimization.LinearProgramming {
 
-  public class LinearProgrammingProblemDefintion : CompiledProblemDefinition {
+  [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<FileValue> fileNameParam;
+
+    [Storable]
+    private byte[] fileContent;
+
+    public FileBasedLinearProgrammingProblemDefinition() {
+      Parameters.Add(fileNameParam = new FixedValueParameter<FileValue>(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<FileValue> 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 void Initialize() {
-    }
+    public override IDeepCloneable Clone(Cloner cloner) => new FileBasedLinearProgrammingProblemDefinition(this, cloner);
   }
 }