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source: branches/ParameterBinding/HeuristicLab.Persistence/3.3/Default/CompositeSerializers/KeyValuePairSerializer.cs @ 6716

Last change on this file since 6716 was 4068, checked in by swagner, 14 years ago

Sorted usings and removed unused usings in entire solution (#1094)

File size: 3.4 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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.Linq;
25using System.Reflection;
26using HeuristicLab.Persistence.Core;
27using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
28using HeuristicLab.Persistence.Interfaces;
29
30namespace HeuristicLab.Persistence.Default.CompositeSerializers {
31
32  [StorableClass]
33  internal sealed class KeyValuePairSerializer : ICompositeSerializer {
34
35    public int Priority {
36      get { return 100; }
37    }
38
39    private static readonly Type genericKeyValuePairType =
40      typeof(KeyValuePair<int, int>).GetGenericTypeDefinition();
41
42    public bool CanSerialize(Type type) {
43      return type.IsGenericType &&
44             type.GetGenericTypeDefinition() == genericKeyValuePairType;
45    }
46
47    public string JustifyRejection(Type type) {
48      if (!type.IsGenericType)
49        return "not even generic";
50      return "not generic KeyValuePair<,>";
51    }
52
53    public IEnumerable<Tag> CreateMetaInfo(object o) {
54      return new Tag[] { };
55    }
56
57    public IEnumerable<Tag> Decompose(object o) {
58      Type t = o.GetType();
59      Tag key, value;
60      try {
61        key = new Tag("key", t.GetProperty("Key").GetValue(o, null));
62      }
63      catch (Exception e) {
64        throw new PersistenceException("Exception caught during KeyValuePair decomposition", e);
65      }
66      yield return key;
67      try {
68        value = new Tag("value", t.GetProperty("Value").GetValue(o, null));
69      }
70      catch (Exception e) {
71        throw new PersistenceException("Exception caught during KeyValuePair decomposition", e);
72      }
73      yield return value;
74    }
75
76    public object CreateInstance(Type type, IEnumerable<Tag> metaInfo) {
77      return Activator.CreateInstance(type, true);
78    }
79
80    public void Populate(object instance, IEnumerable<Tag> o, Type t) {
81      IEnumerator<Tag> iter = o.GetEnumerator();
82      try {
83        iter.MoveNext();
84        t.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
85          .Single(fi => fi.Name == "key").SetValue(instance, iter.Current.Value);
86        iter.MoveNext();
87        t.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
88          .Single(fi => fi.Name == "value").SetValue(instance, iter.Current.Value);
89      }
90      catch (InvalidOperationException e) {
91        throw new PersistenceException("Not enough components to populate KeyValuePair instance", e);
92      }
93      catch (Exception e) {
94        throw new PersistenceException("Exception caught during KeyValuePair reconstruction", e);
95      }
96    }
97  }
98}
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