#region License Information /* HeuristicLab * Copyright (C) 2002-2012 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.Linq; using System.Text; using System.Xml; using HeuristicLab.DataImporter.Data; using HeuristicLab.DataImporter.Data.CommandBase; using HeuristicLab.DataImporter.Data.Model; using HeuristicLab.DataImporter.Command.View; using HeuristicLab.Persistence.Default.CompositeSerializers.Storable; namespace HeuristicLab.DataImporter.Command { [StorableClass] [ViewableCommandInfoAttribute("Percental Change", 1, ColumnGroupState.DoubleColumnSelected, "Change Values", Position = 3)] public class PercentalChangeCommand : ColumnGroupCommandWithAffectedColumnsBase { private Dictionary oldColumns; private ICollection oldSortedColumnIndices; private PercentalChangeCommand() : base(null, string.Empty, null) { oldColumns = new Dictionary(); } public PercentalChangeCommand(DataSet dataSet, string columnGroupName, int[] affectedColumns) : base(dataSet, columnGroupName, affectedColumns) { oldColumns = new Dictionary(); } public override string Description { get { return "Calculate the percental change from last to the current value"; } } public override void Execute() { base.Execute(); foreach (int col in AffectedColumns) { DoubleColumn doubleCol = ColumnGroup.GetColumn(col) as DoubleColumn; if (doubleCol == null) throw new CommandExecutionException("Filtering is only supported for double columns.", this); } DoubleColumn column; oldSortedColumnIndices = new List(ColumnGroup.SortedColumnIndexes); foreach (int col in AffectedColumns) { if (ColumnGroup.GetColumn(col) is DoubleColumn) { column = (DoubleColumn)ColumnGroup.GetColumn(col); oldColumns.Add(col, column); ColumnGroup.ReplaceColumn(col, CalcNewColumn(column)); } } ColumnGroup.SortedColumnIndexes = oldSortedColumnIndices; ColumnGroup.FireChanged(); ColumnGroup = null; } public override void UndoExecute() { base.UndoExecute(); foreach (KeyValuePair pair in oldColumns) ColumnGroup.ReplaceColumn(pair.Key, pair.Value); ColumnGroup.SortedColumnIndexes = oldSortedColumnIndices; oldSortedColumnIndices = null; oldColumns.Clear(); ColumnGroup.FireChanged(); ColumnGroup = null; } private DoubleColumn CalcNewColumn(DoubleColumn oldColumn) { DoubleColumn newCol = (DoubleColumn)oldColumn.CreateCopyOfColumnWithoutValues(); var data = oldColumn.ValuesEnumerable.Cast(); var ans = new double?[] { null } // insert an empty value at the beginning .Concat(data) .Zip(data, (prev, cur) => (cur.HasValue && prev.HasValue) ? (cur - prev) / prev : null) .ToArray(); foreach (var e in ans) newCol.AddValue(e); newCol.SortOrder = oldColumn.SortOrder; return newCol; } } }