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source: trunk/sources/HeuristicLab.Constraints/3.3/IsIntegerConstraint.cs @ 2445

Last change on this file since 2445 was 1853, checked in by epitzer, 15 years ago

Fix EmptyStorableClass attributes. (#603)

File size: 2.2 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Text;
25using HeuristicLab.Core;
26using HeuristicLab.Data;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28
29namespace HeuristicLab.Constraints {
30  /// <summary>
31  /// Constraint that allows only integer values.
32  /// </summary>
33  public class IsIntegerConstraint : ConstraintBase {
34    /// <inheritdoc select="summary"/>
35    public override string Description {
36      get { return "Allows only integer values."; }
37    }
38
39    /// <summary>
40    /// Checks whether the given element fulfills the current constraint.
41    /// </summary>
42    /// <param name="item">The item to check.</param>
43    /// <returns><c>true</c> if the constraint could be fulfilled, <c>false</c> otherwise.</returns>
44    public override bool Check(IItem item) {
45      // ConstrainedIntData is always integer => just return true
46      if (item is ConstrainedIntData)
47        return true;
48
49      // if we have an item of ConstrainedDoubleData then we check if it is integer or not
50      if (item is ConstrainedDoubleData) {
51        ConstrainedDoubleData d = (ConstrainedDoubleData)item;
52        if (d.Data == Math.Truncate(d.Data)) {
53          return true;
54        } else {
55          return false;
56        }
57      }
58
59      // assume that all other data types are never integer
60      return false;
61    }
62  }
63}
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