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source: trunk/HeuristicLab.Problems.DataAnalysis/3.4/ModifiableDataset.cs @ 16243

Last change on this file since 16243 was 16242, checked in by jkarder, 5 years ago

#2939: throw ArgumentException if invalid row is specified

File size: 9.2 KB
Line 
1#region License Information
2
3/* HeuristicLab
4 * Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
5 *
6 * This file is part of HeuristicLab.
7 *
8 * HeuristicLab is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * HeuristicLab is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22#endregion
23
24using System;
25using System.Collections;
26using System.Collections.Generic;
27using System.Linq;
28using HeuristicLab.Common;
29using HeuristicLab.Core;
30using HeuristicLab.Data;
31using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
32
33namespace HeuristicLab.Problems.DataAnalysis {
34  [Item("ModifiableDataset", "Represents a dataset containing data that should be analyzed, which can be modified by adding or replacing variables and values.")]
35  [StorableClass]
36  public sealed class ModifiableDataset : Dataset, IStringConvertibleMatrix {
37    [StorableConstructor]
38    private ModifiableDataset(bool deserializing) : base(deserializing) { }
39
40    private ModifiableDataset(ModifiableDataset original, Cloner cloner) : base(original, cloner) {
41      variableNames = new List<string>(original.variableNames);
42      variableValues = CloneValues(original.variableValues);
43    }
44
45    public override IDeepCloneable Clone(Cloner cloner) { return new ModifiableDataset(this, cloner); }
46
47    public ModifiableDataset() { }
48
49    public ModifiableDataset(IEnumerable<string> variableNames, IEnumerable<IList> variableValues, bool cloneValues = false) :
50      base(variableNames, variableValues, cloneValues) { }
51
52    public Dataset ToDataset() {
53      return new Dataset(variableNames, variableNames.Select(v => variableValues[v]));
54    }
55
56
57    public IEnumerable<object> GetRow(int row) {
58      if (row < 0 || row >= Rows)
59        throw new ArgumentException(string.Format("Invalid row {0} specified. The dataset contains {1} row(s).", row, Rows));
60
61      return variableValues.Select(x => x.Value[row]);
62    }
63
64    public void AddRow(IEnumerable<object> values) {
65      var list = values.ToList();
66      if (list.Count != variableNames.Count)
67        throw new ArgumentException("The number of values must be equal to the number of variable names.");
68      // check if all the values are of the correct type
69      for (int i = 0; i < list.Count; ++i) {
70        if (list[i].GetType() != GetVariableType(variableNames[i])) {
71          throw new ArgumentException("The type of the provided value does not match the variable type.");
72        }
73      }
74      // add values
75      for (int i = 0; i < list.Count; ++i) {
76        variableValues[variableNames[i]].Add(list[i]);
77      }
78      Rows++;
79      OnRowsChanged();
80      OnReset();
81    }
82
83    public void ReplaceRow(int row, IEnumerable<object> values) {
84      var list = values.ToList();
85      if (list.Count != variableNames.Count)
86        throw new ArgumentException("The number of values must be equal to the number of variable names.");
87      // check if all the values are of the correct type
88      for (int i = 0; i < list.Count; ++i) {
89        if (list[i].GetType() != GetVariableType(variableNames[i])) {
90          throw new ArgumentException("The type of the provided value does not match the variable type.");
91        }
92      }
93      // replace values
94      for (int i = 0; i < list.Count; ++i) {
95        variableValues[variableNames[i]][row] = list[i];
96      }
97      OnReset();
98    }
99
100    // slow, avoid using this
101    public void RemoveRow(int row) {
102      foreach (var list in variableValues.Values)
103        list.RemoveAt(row);
104      Rows--;
105      OnRowsChanged();
106      OnReset();
107    }
108
109    // adds a new variable to the dataset
110    public void AddVariable(string variableName, IList values) {
111      InsertVariable(variableName, Columns, values);
112    }
113
114    public void InsertVariable(string variableName, int position, IList values) {
115      if (variableValues.ContainsKey(variableName))
116        throw new ArgumentException(string.Format("Variable {0} is already present in the dataset.", variableName));
117
118      if (position < 0 || position > Columns)
119        throw new ArgumentException(string.Format("Incorrect position {0} specified. The position must be between 0 and {1}.", position, Columns));
120
121      if (values == null)
122        throw new ArgumentNullException("values", "Values must not be null. At least an empty list of values has to be provided.");
123
124      if (values.Count != Rows)
125        throw new ArgumentException(string.Format("{0} values are provided, but {1} rows are present in the dataset.", values.Count, Rows));
126
127      if (!IsAllowedType(values))
128        throw new ArgumentException(string.Format("Unsupported type {0} for variable {1}.", GetElementType(values), variableName));
129
130      variableNames.Insert(position, variableName);
131      variableValues[variableName] = values;
132
133      OnColumnsChanged();
134      OnColumnNamesChanged();
135      OnReset();
136    }
137
138    public void ReplaceVariable(string variableName, IList values) {
139      if (!variableValues.ContainsKey(variableName))
140        throw new ArgumentException(string.Format("Variable {0} is not present in the dataset.", variableName));
141      if (values.Count != variableValues[variableName].Count)
142        throw new ArgumentException("The number of values must coincide with the number of dataset rows.");
143      if (GetVariableType(variableName) != values[0].GetType())
144        throw new ArgumentException("The type of the provided value does not match the variable type.");
145      variableValues[variableName] = values;
146    }
147
148
149    public void RemoveVariable(string variableName) {
150      if (!variableValues.ContainsKey(variableName))
151        throw new ArgumentException(string.Format("The variable {0} does not exist in the dataset.", variableName));
152      variableValues.Remove(variableName);
153      variableNames.Remove(variableName);
154      OnColumnsChanged();
155      OnColumnNamesChanged();
156      OnReset();
157    }
158
159    public void ClearValues() {
160      foreach (var list in variableValues.Values) {
161        list.Clear();
162      }
163      Rows = 0;
164      OnRowsChanged();
165      OnReset();
166    }
167
168
169    public void SetVariableValue(object value, string variableName, int row) {
170      IList list;
171      variableValues.TryGetValue(variableName, out list);
172      if (list == null)
173        throw new ArgumentException("The variable " + variableName + " does not exist in the dataset.");
174      if (row < 0 || list.Count < row)
175        throw new ArgumentOutOfRangeException("Invalid row value");
176      if (GetVariableType(variableName) != value.GetType())
177        throw new ArgumentException("The type of the provided value does not match the variable type.");
178
179      list[row] = value;
180      OnItemChanged(row, variableNames.IndexOf(variableName));
181    }
182
183    bool IStringConvertibleMatrix.SetValue(string value, int rowIndex, int columnIndex) {
184      var variableName = variableNames[columnIndex];
185      // if value represents a double
186      double dv;
187      if (double.TryParse(value, out dv)) {
188        SetVariableValue(dv, variableName, rowIndex);
189        return true;
190      }
191      // if value represents a DateTime object
192      DateTime dt;
193      if (DateTime.TryParse(value, out dt)) {
194        SetVariableValue(dt, variableName, rowIndex);
195        return true;
196      }
197      // if value is simply a string
198      SetVariableValue(value, variableName, rowIndex);
199      return true;
200    }
201
202    bool IStringConvertibleMatrix.Validate(string value, out string errorMessage) {
203      errorMessage = string.Empty;
204      return true;
205    }
206
207    #region event handlers
208    public override event EventHandler RowsChanged;
209    private void OnRowsChanged() {
210      var handler = RowsChanged;
211      if (handler != null)
212        handler(this, EventArgs.Empty);
213    }
214
215    public override event EventHandler ColumnsChanged;
216    private void OnColumnsChanged() {
217      var handler = ColumnsChanged;
218      if (handler != null)
219        handler(this, EventArgs.Empty);
220    }
221
222    public override event EventHandler ColumnNamesChanged;
223    private void OnColumnNamesChanged() {
224      var handler = ColumnNamesChanged;
225      if (handler != null)
226        handler(this, EventArgs.Empty);
227    }
228
229    public override event EventHandler Reset;
230    private void OnReset() {
231      var handler = Reset;
232      if (handler != null)
233        handler(this, EventArgs.Empty);
234    }
235
236    public override event EventHandler<EventArgs<int, int>> ItemChanged;
237    private void OnItemChanged(int rowIndex, int columnIndex) {
238      var handler = ItemChanged;
239      if (handler != null) {
240        handler(this, new EventArgs<int, int>(rowIndex, columnIndex));
241      }
242    }
243    #endregion
244  }
245}
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