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source: trunk/sources/HeuristicLab.Common/3.3/ObjectExtensions.cs @ 6181

Last change on this file since 6181 was 6181, checked in by mkommend, 12 years ago

#1522: Reorganized type checks and added a clause to exclude primitive arrays from being enumerated.

File size: 2.2 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2011 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;
24using System.Collections.Generic;
25using System.Reflection;
26
27namespace HeuristicLab.Common {
28  public static class ObjectExtensions {
29    public static IEnumerable<object> GetObjectGraphObjects(this object obj) {
30      var objects = new HashSet<object>();
31      obj.CollectObjectGraphObjects(objects);
32      return objects;
33    }
34
35    private static void CollectObjectGraphObjects(this object obj, HashSet<object> objects) {
36      if (obj == null || objects.Contains(obj)) return;
37      if (obj is ValueType || obj is string) return;
38      if (obj is Delegate || obj is EventHandler) return;
39      if (obj.GetType().IsSubclassOfRawGeneric(typeof(EventHandler<>))) return;
40      if (obj.GetType().GetElementType() != null) {
41        Type elementType = obj.GetType().GetElementType();
42        if (elementType.IsPrimitive || elementType == typeof(string) || elementType == typeof(decimal)) return;
43      }
44
45      objects.Add(obj);
46
47      IEnumerable enumerable = obj as IEnumerable;
48      if (enumerable != null) {
49        foreach (object value in enumerable) {
50          value.CollectObjectGraphObjects(objects);
51        }
52      } else {
53        foreach (FieldInfo f in obj.GetType().GetAllFields()) {
54          f.GetValue(obj).CollectObjectGraphObjects(objects);
55        }
56      }
57    }
58  }
59}
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