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source: branches/PersistenceOverhaul/HeuristicLab.Persistence/4.0/Transformers/StackTransformer.cs

Last change on this file was 13326, checked in by swagner, 7 years ago

#2520: Created plugin for new persistence implementation

File size: 3.3 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2012 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 HeuristicLab.Persistence.Data;
26
27namespace HeuristicLab.Persistence {
28  internal abstract class GenericStackTransformer<TSource, TTarget> : TransformerBase {
29    public override bool CanTransformType(Type type) {
30      return type == typeof(Stack<TSource>);
31    }
32    public override PersistenceData ToData(object o, PersistenceMapper mapper) {
33      var data = new ArrayData<TTarget>(Id);
34      mapper.Cache(o, data);
35      data.TypeId = mapper.GetTypeId(o.GetType());
36
37      var enumerable = (IEnumerable<TSource>)o;
38      var componentIds = new List<TTarget>();
39      foreach (var component in enumerable) {
40        componentIds.Add(GetTarget(component, mapper));
41      }
42      componentIds.Reverse();
43      data.Values = componentIds.ToArray();
44      return data;
45    }
46
47    public override object ToObject(PersistenceData data, PersistenceMapper mapper) {
48      var collection = (ArrayData<TTarget>)data;
49      var type = mapper.GetType(collection.TypeId);
50
51      var o = Activator.CreateInstance(type, true);
52      mapper.Cache(data, o);
53      dynamic stack = o;
54      foreach (var component in collection.Values) {
55        stack.Push(GetSource(component, mapper));
56      }
57      return o;
58    }
59
60    protected abstract TTarget GetTarget(TSource source, PersistenceMapper mapper);
61    protected abstract TSource GetSource(TTarget target, PersistenceMapper mapper);
62  }
63
64  internal abstract class PrimitiveStackTransformer<T> : GenericStackTransformer<T, T> {
65    protected override T GetTarget(T source, PersistenceMapper mapper) {
66      return source;
67    }
68    protected override T GetSource(T target, PersistenceMapper mapper) {
69      return target;
70    }
71  }
72
73  [Transformer("305FE51F-CE6A-43A7-A0FC-CCFFC1378680", 405)]
74  internal sealed class DoubleStackTransformer : PrimitiveStackTransformer<double> { }
75
76  [Transformer("E84A21DF-BDAF-4A24-9EF6-934ACDB82423", 406)]
77  internal sealed class StackTransformer : GenericStackTransformer<object, uint> {
78    public override bool CanTransformType(Type type) {
79      return type.IsGenericType && (type.GetGenericTypeDefinition() == typeof(Stack<>));
80    }
81
82    protected override uint GetTarget(object source, PersistenceMapper mapper) {
83      return mapper.GetDataId(source);
84    }
85    protected override object GetSource(uint target, PersistenceMapper mapper) {
86      return mapper.GetObject(target);
87    }
88  }
89}
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