source: branches/DataAnalysis Refactoring/HeuristicLab.Problems.DataAnalysis/3.4/Implementation/DataAnalysisProblemData.cs @ 5736

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2011 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 <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using HeuristicLab.Collections;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.Problems.DataAnalysis {
  [StorableClass]
  public abstract class DataAnalysisProblemData : ParameterizedNamedItem, IDataAnalysisProblemData {
    private const string DatasetParameterName = "Dataset";
    private const string InputVariablesParameterName = "InputVariables";
    private const string TrainingPartitionStartParameterName = "TrainingPartitionStart";
    private const string TrainingPartitionEndParameterName = "TrainingPartitionEnd";
    private const string TestPartitionStartParameterName = "TestPartitionStart";
    private const string TestPartitionEndParameterName = "TestPartitionEnd";

    #region parameter properites
    public IFixedValueParameter<Dataset> DatasetParameter {
      get { return (IFixedValueParameter<Dataset>)Parameters[DatasetParameterName]; }
    }
    public IFixedValueParameter<ICheckedItemList<StringValue>> InputVariablesParameter {
      get { return (IFixedValueParameter<ICheckedItemList<StringValue>>)Parameters[InputVariablesParameterName]; }
    }
    public IFixedValueParameter<IntValue> TrainingPartitionStartParameter {
      get { return (IFixedValueParameter<IntValue>)Parameters[TrainingPartitionStartParameterName]; }
    }
    public IFixedValueParameter<IntValue> TrainingPartitionEndParameter {
      get { return (IFixedValueParameter<IntValue>)Parameters[TrainingPartitionEndParameterName]; }
    }
    public IFixedValueParameter<IntValue> TestPartitionStartParameter {
      get { return (IFixedValueParameter<IntValue>)Parameters[TestPartitionStartParameterName]; }
    }
    public IFixedValueParameter<IntValue> TestPartitionEndParameter {
      get { return (IFixedValueParameter<IntValue>)Parameters[TestPartitionEndParameterName]; }
    }
    #endregion

    #region propeties
    public Dataset Dataset {
      get { return DatasetParameter.Value; }
    }
    public ICheckedItemList<StringValue> InputVariables {
      get { return InputVariablesParameter.Value; }
    }
    public IEnumerable<string> AllowedInputVariables {
      get { return InputVariables.CheckedItems.Select(x => x.Value.Value); }
    }

    public IntValue TrainingPartitionStart {
      get { return TrainingPartitionStartParameter.Value; }
    }
    public IntValue TrainingPartitionEnd {
      get { return TrainingPartitionEndParameter.Value; }
    }
    public IntValue TestPartitionStart {
      get { return TestPartitionStartParameter.Value; }
    }
    public IntValue TestPartitionEnd {
      get { return TestPartitionEndParameter.Value; }
    }

    public IEnumerable<int> TrainingIndizes {
      get {
        return Enumerable.Range(TrainingPartitionStart.Value, TrainingPartitionEnd.Value - TrainingPartitionStart.Value)
                         .Where(i => i >= 0 && i < Dataset.Rows && (i < TestPartitionStart.Value || TestPartitionEnd.Value <= i));
      }
    }
    public IEnumerable<int> TestIndizes {
      get {
        return Enumerable.Range(TestPartitionStart.Value, TestPartitionEnd.Value - TestPartitionStart.Value)
           .Where(i => i >= 0 && i < Dataset.Rows);
      }
    }
    #endregion

    protected DataAnalysisProblemData(DataAnalysisProblemData original, Cloner cloner) : base(original, cloner) { }
    [StorableConstructor]
    protected DataAnalysisProblemData(bool deserializing) : base(deserializing) { }

    protected DataAnalysisProblemData(Dataset dataset, IEnumerable<string> allowedInputVariables) {
      if (dataset == null) throw new ArgumentNullException("The dataset must not be null.");
      if (allowedInputVariables == null) throw new ArgumentNullException("The allowedInputVariables must not be null.");

      if (allowedInputVariables.Except(dataset.VariableNames).Any())
        throw new ArgumentException("All allowed input variables must be present in the dataset.");

      var inputVariables = new CheckedItemList<StringValue>(dataset.VariableNames.Select(x => new StringValue(x)));
      foreach (StringValue x in inputVariables)
        inputVariables.SetItemCheckedState(x, allowedInputVariables.Contains(x.Value));

      int trainingPartitionStart = 0;
      int trainingPartitionEnd = dataset.Rows / 2;
      int testPartitionStart = dataset.Rows / 2;
      int testPartitionEnd = dataset.Rows;

      Parameters.Add(new FixedValueParameter<Dataset>(DatasetParameterName, "", dataset));
      Parameters.Add(new FixedValueParameter<ICheckedItemList<StringValue>>(InputVariablesParameterName, "", inputVariables.AsReadOnly()));
      Parameters.Add(new FixedValueParameter<IntValue>(TrainingPartitionStartParameterName, "", new IntValue(trainingPartitionStart)));
      Parameters.Add(new FixedValueParameter<IntValue>(TrainingPartitionEndParameterName, "", new IntValue(trainingPartitionEnd)));
      Parameters.Add(new FixedValueParameter<IntValue>(TestPartitionStartParameterName, "", new IntValue(testPartitionStart)));
      Parameters.Add(new FixedValueParameter<IntValue>(TestPartitionEndParameterName, "", new IntValue(testPartitionEnd)));

      ((ValueParameter<Dataset>)DatasetParameter).ReactOnValueToStringChangedAndValueItemImageChanged = false;
      RegisterEventHandlers();
    }

    private void RegisterEventHandlers() {
      DatasetParameter.ValueChanged += new EventHandler(Parameter_ValueChanged);
      InputVariables.CheckedItemsChanged += new CollectionItemsChangedEventHandler<IndexedItem<StringValue>>(InputVariables_CheckedItemsChanged);
      TrainingPartitionStart.ValueChanged += new EventHandler(Parameter_ValueChanged);
      TrainingPartitionEnd.ValueChanged += new EventHandler(Parameter_ValueChanged);
      TestPartitionStart.ValueChanged += new EventHandler(Parameter_ValueChanged);
      TestPartitionEnd.ValueChanged += new EventHandler(Parameter_ValueChanged);
    }

    private void InputVariables_CheckedItemsChanged(object sender, CollectionItemsChangedEventArgs<IndexedItem<StringValue>> e) {
      OnChanged();
    }

    private void Parameter_ValueChanged(object sender, EventArgs e) {
      OnChanged();
    }

    public event EventHandler Changed;
    protected virtual void OnChanged() {
      var listeners = Changed;
      if (listeners != null) listeners(this, EventArgs.Empty);
    }
  }
}