#region License Information
/* HeuristicLab
* Copyright (C) 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;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using HeuristicLab.PluginInfrastructure;
namespace HeuristicLab.Problems.DataAnalysis.Views {
[NonDiscoverableType]
public abstract class AbstractFeatureCorrelationCalculator {
private readonly BackgroundWorker backgroundWorker;
public AbstractFeatureCorrelationCalculator() {
backgroundWorker = new BackgroundWorker { WorkerReportsProgress = true, WorkerSupportsCancellation = true };
backgroundWorker.DoWork += BackgroundWorker_DoWork;
backgroundWorker.ProgressChanged += BackgroundWorker_ProgressChanged;
backgroundWorker.RunWorkerCompleted += BackgroundWorker_RunWorkerCompleted;
}
private BackgroundWorkerInfo bwInfo;
public void TryCancelCalculation() {
if (!backgroundWorker.IsBusy) return;
bwInfo = null;
backgroundWorker.CancelAsync();
}
protected static IEnumerable GetRelevantIndices(IDataAnalysisProblemData problemData, string partition) {
IEnumerable var;
if (partition.Equals(AbstractFeatureCorrelationView.TRAININGSAMPLES))
var = problemData.TrainingIndices;
else if (partition.Equals(AbstractFeatureCorrelationView.TESTSAMPLES))
var = problemData.TestIndices;
else var = Enumerable.Range(0, problemData.Dataset.Rows);
return var;
}
#region backgroundworker
protected void StartCalculation(BackgroundWorkerInfo info) {
bwInfo = info;
if (backgroundWorker.IsBusy) {
backgroundWorker.CancelAsync();
return;
}
backgroundWorker.RunWorkerAsync(bwInfo);
}
protected abstract void BackgroundWorker_DoWork(object sender, DoWorkEventArgs e);
private void BackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) {
BackgroundWorker worker = (BackgroundWorker)sender;
if (!e.Cancelled && !worker.CancellationPending) {
if (e.Error != null) {
ErrorHandling.ShowErrorDialog(e.Error);
} else {
OnCorrelationCalculationFinished((double[,])e.Result, bwInfo.Calculator, bwInfo.Partition, bwInfo.IgnoreMissingValues, bwInfo.Variable);
}
} else if (bwInfo != null) {
backgroundWorker.RunWorkerAsync(bwInfo);
}
}
#endregion
#region events
public class CorrelationCalculationFinishedArgs : EventArgs {
public double[,] Correlation { get; private set; }
public IDependencyCalculator Calculcator { get; private set; }
public string Partition { get; private set; }
public bool IgnoreMissingValues { get; private set; }
public string Variable { get; private set; }
public CorrelationCalculationFinishedArgs(double[,] correlation, IDependencyCalculator calculator, string partition, bool ignoreMissingValues, string variable = null) {
this.Correlation = correlation;
this.Calculcator = calculator;
this.Partition = partition;
this.IgnoreMissingValues = ignoreMissingValues;
this.Variable = variable;
}
}
public delegate void CorrelationCalculationFinishedHandler(object sender, CorrelationCalculationFinishedArgs e);
public event CorrelationCalculationFinishedHandler CorrelationCalculationFinished;
protected virtual void OnCorrelationCalculationFinished(double[,] correlation, IDependencyCalculator calculator, string partition, bool ignoreMissingValues, string variable = null) {
var handler = CorrelationCalculationFinished;
if (handler != null)
handler(this, new CorrelationCalculationFinishedArgs(correlation, calculator, partition, ignoreMissingValues, variable));
}
public event ProgressChangedEventHandler ProgressChanged;
protected virtual void BackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e) {
var handler = ProgressChanged;
if (handler != null) {
handler(sender, e);
}
}
#endregion
protected class BackgroundWorkerInfo {
public IDataset Dataset { get; set; }
public IDependencyCalculator Calculator { get; set; }
public string Partition { get; set; }
public IEnumerable Indices { get; set; }
public bool IgnoreMissingValues { get; set; }
public string Variable { get; set; }
public int Frames { get; set; }
public double[,] AlreadyCalculated { get; set; }
}
}
}