1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2015 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.Collections.Generic;
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24 | using System.Linq;
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25 | using Google.ProtocolBuffers;
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26 |
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27 | namespace HeuristicLab.Persistence {
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28 | public sealed class Mapper {
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29 | private static StaticCache staticCache = null;
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30 | private static object locker = new object();
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31 | public static StaticCache StaticCache {
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32 | get {
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33 | lock (locker) {
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34 | if (staticCache == null) staticCache = new StaticCache();
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35 | return staticCache;
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36 | }
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37 | }
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38 | }
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39 |
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40 | private Index<ITransformer> transformers;
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41 | private Index<Type> types;
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42 | private Index<string> strings;
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43 | private Index<Box> boxes;
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44 | private Dictionary<object, uint> object2BoxId;
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45 | private Dictionary<uint, object> boxId2object;
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46 |
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47 | public long BoxCount { get; private set; }
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48 |
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49 | public Mapper() {
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50 | transformers = new Index<ITransformer>();
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51 | types = new Index<Type>();
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52 | strings = new Index<string>();
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53 | boxes = new Index<Box>();
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54 | object2BoxId = new Dictionary<object, uint>(new ReferenceEqualityComparer<object>());
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55 | boxId2object = new Dictionary<uint, object>();
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56 |
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57 | BoxCount = 0;
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58 | }
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59 |
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60 | public uint GetTransformerId(ITransformer transformer) {
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61 | return transformers.GetIndex(transformer);
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62 | }
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63 | public ITransformer GetTransformer(uint transformerId) {
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64 | return transformers.GetValue(transformerId);
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65 | }
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66 |
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67 | public uint GetTypeId(Type type) {
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68 | return types.GetIndex(type);
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69 | }
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70 | public Type GetType(uint typeId) {
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71 | return types.GetValue(typeId);
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72 | }
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73 |
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74 | public uint GetStringId(string str) {
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75 | return strings.GetIndex(str);
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76 | }
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77 | public string GetString(uint stringId) {
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78 | return strings.GetValue(stringId);
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79 | }
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80 |
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81 | public uint GetBoxId(object o) {
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82 | uint boxId;
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83 | if (object2BoxId.TryGetValue(o, out boxId)) return boxId;
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84 |
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85 | if (o == null)
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86 | boxId = boxes.GetIndex(null);
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87 | else {
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88 | var type = o.GetType();
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89 | var typeInfo = StaticCache.GetTypeInfo(type);
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90 | if (typeInfo.Transformer == null) throw new ArgumentException("Cannot serialize object of type " + o.GetType());
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91 | BoxCount++;
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92 | typeInfo.Used++;
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93 | boxId = boxes.GetIndex(typeInfo.Transformer.ToBox(o, this));
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94 | }
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95 | object2BoxId.Add(o, boxId);
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96 | return boxId;
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97 | }
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98 | public object GetObject(uint boxId) {
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99 | object o;
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100 | if (boxId2object.TryGetValue(boxId, out o)) return o;
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101 |
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102 | var box = this.boxes.GetValue(boxId);
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103 | if (box == null)
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104 | o = null;
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105 | else {
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106 | var transformer = transformers.GetValue(box.TransformerId);
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107 | o = transformer.ToObject(box, this);
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108 | }
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109 | boxId2object.Add(boxId, o);
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110 | return o;
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111 | }
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112 |
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113 | public object CreateInstance(Type type) {
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114 | return StaticCache.GetTypeInfo(type).GetConstructor()();
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115 | }
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116 |
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117 | public static Bundle ToBundle(object o) {
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118 | var mapper = new Mapper();
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119 | var bundle = Bundle.CreateBuilder();
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120 | bundle.RootBoxId = mapper.GetBoxId(o);
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121 | bundle.AddRangeTransformerGuids(mapper.transformers.GetValues().Select(x => x.Guid).Select(x => ByteString.CopyFrom(x.ToByteArray())));
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122 | bundle.AddRangeTypeGuids(mapper.types.GetValues().Select(x => StaticCache.GetGuid(x)).Select(x => ByteString.CopyFromUtf8(x)));
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123 | bundle.AddRangeStrings(mapper.strings.GetValues());
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124 | bundle.AddRangeBoxes(mapper.boxes.GetValues());
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125 | return bundle.Build();
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126 | }
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127 | public static object ToObject(Bundle bundle) {
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128 | var mapper = new Mapper();
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129 | mapper.types = new Index<Type>(bundle.TypeGuidsList.Select(x => x.ToStringUtf8()).Select(x => StaticCache.GetType(x)));
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130 | mapper.strings = new Index<string>(bundle.StringsList);
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131 | mapper.boxes = new Index<Box>(bundle.BoxesList);
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132 | mapper.transformers = new Index<ITransformer>(bundle.TransformerGuidsList.Select(x => new Guid(x.ToByteArray())).Select(x => StaticCache.GetTransformer(x)));
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133 | return mapper.GetObject(bundle.RootBoxId);
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134 | }
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135 | }
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136 | }
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