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 System.Reflection;
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26 | using System.Reflection.Emit;
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27 |
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28 | namespace HeuristicLab.Persistence {
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29 | public sealed class TypeInfo {
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30 | private Func<object> constructor;
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31 |
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32 | public Type Type { get; private set; }
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33 | public ITransformer Transformer { get; private set; }
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34 | public StorableTypeAttribute StorableTypeAttribute { get; private set; }
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35 | public IEnumerable<ComponentInfo> Fields { get; private set; }
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36 | public IEnumerable<ComponentInfo> Properties { get; private set; }
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37 | public IEnumerable<MethodInfo> BeforeSerializationHooks { get; private set; }
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38 | public IEnumerable<MethodInfo> AfterDeserializationHooks { get; private set; }
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39 | public long Used { get; set; }
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40 |
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41 | public TypeInfo(Type type) {
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42 | constructor = null;
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43 | Type = type;
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44 | Fields = Enumerable.Empty<ComponentInfo>();
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45 | Properties = Enumerable.Empty<ComponentInfo>();
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46 | BeforeSerializationHooks = Enumerable.Empty<MethodInfo>();
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47 | AfterDeserializationHooks = Enumerable.Empty<MethodInfo>();
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48 | Used = 0;
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49 | Reflect();
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50 | }
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51 | public TypeInfo(Type type, ITransformer transformer)
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52 | : this(type) {
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53 | Transformer = transformer;
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54 | }
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55 |
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56 | private void Reflect() {
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57 | var type = Type;
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58 | StorableTypeAttribute = StorableTypeAttribute.GetStorableTypeAttribute(type);
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59 | if (StorableTypeAttribute != null) {
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60 | // traverse type hierarchy from base type to sub types
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61 | Stack<Type> types = new Stack<Type>();
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62 | while (type != null) {
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63 | types.Push(type);
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64 | type = type.BaseType;
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65 | }
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66 |
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67 | var fields = new List<ComponentInfo>();
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68 | var properties = new List<ComponentInfo>();
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69 | var beforeSerializationHooks = new List<MethodInfo>();
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70 | var afterDeserializationHooks = new List<MethodInfo>();
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71 | while (types.Count > 0) {
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72 | type = types.Pop();
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73 | if (StorableTypeAttribute.MemberSelection != StorableMemberSelection.AllProperties) {
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74 | var fieldInfos = type.GetFields(BindingFlags.Instance | BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic)
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75 | .Where(x => !x.Name.StartsWith("<") && !x.Name.EndsWith("k__BackingField")); // exclude backing fields
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76 | if (StorableTypeAttribute.MemberSelection == StorableMemberSelection.MarkedOnly)
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77 | fieldInfos = fieldInfos.Where(x => StorableAttribute.IsStorable(x)).ToArray();
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78 | foreach (var field in fieldInfos) {
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79 | var attrib = StorableAttribute.GetStorableAttribute(field);
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80 | var name = attrib == null || string.IsNullOrEmpty(attrib.Name) ? field.Name : attrib.Name;
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81 | fields.Add(new ComponentInfo(type.Name + '.' + name, field, attrib, true, true));
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82 | }
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83 | }
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84 |
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85 | if (StorableTypeAttribute.MemberSelection != StorableMemberSelection.AllFields) {
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86 | var propertyInfos = type.GetProperties(BindingFlags.Instance | BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic).
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87 | Where(x => x.GetIndexParameters().Length == 0); // exclude indexed properties
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88 | if (StorableTypeAttribute.MemberSelection == StorableMemberSelection.MarkedOnly)
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89 | propertyInfos = propertyInfos.Where(x => StorableAttribute.IsStorable(x)).ToArray();
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90 | foreach (var property in propertyInfos) {
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91 | var attrib = StorableAttribute.GetStorableAttribute(property);
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92 | var name = attrib == null || string.IsNullOrEmpty(attrib.Name) ? property.Name : attrib.Name;
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93 | properties.Add(new ComponentInfo(type.Name + '.' + name, property, attrib, property.CanRead, property.CanWrite));
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94 | }
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95 | }
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96 |
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97 | var methodInfos = type.GetMethods(BindingFlags.Instance | BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic).
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98 | Where(x => StorableHookAttribute.IsStorableHook(x)).
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99 | Where(x => (x.ReturnType == typeof(void)) && (x.GetParameters().Length == 0));
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100 | foreach (var method in methodInfos) {
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101 | foreach (var attrib in StorableHookAttribute.GetStorableHookAttributes(method)) {
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102 | if (attrib.HookType == HookType.BeforeSerialization)
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103 | beforeSerializationHooks.Add(method);
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104 | if (attrib.HookType == HookType.AfterDeserialization)
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105 | afterDeserializationHooks.Add(method);
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106 | }
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107 | }
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108 | }
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109 | Fields = fields;
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110 | Properties = properties;
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111 | BeforeSerializationHooks = beforeSerializationHooks;
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112 | AfterDeserializationHooks = afterDeserializationHooks;
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113 | }
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114 | }
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115 |
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116 | public Func<object> GetConstructor() {
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117 | if (constructor != null) return constructor;
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118 |
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119 | // get storable constructor
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120 | var ctor = Type.GetConstructors(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
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121 | .Where(x => StorableConstructorAttribute.IsStorableConstructor(x))
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122 | .Where(x => (x.GetParameters().Length == 1) && (x.GetParameters()[0].ParameterType == typeof(StorableConstructorFlag)))
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123 | .FirstOrDefault();
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124 | if (ctor != null) {
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125 | DynamicMethod dm = new DynamicMethod("", typeof(object), null, Type, true);
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126 | ILGenerator ilgen = dm.GetILGenerator();
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127 | var local = ilgen.DeclareLocal(typeof(StorableConstructorFlag));
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128 | ilgen.Emit(OpCodes.Ldloca_S, local);
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129 | ilgen.Emit(OpCodes.Initobj, typeof(StorableConstructorFlag)); // load default value for StorableConstructorFlag
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130 | ilgen.Emit(OpCodes.Ldloc_0);
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131 | ilgen.Emit(OpCodes.Newobj, ctor);
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132 | ilgen.Emit(OpCodes.Ret);
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133 | constructor = (Func<object>)dm.CreateDelegate(typeof(Func<object>));
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134 | return constructor;
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135 | }
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136 |
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137 | // get default constructor
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138 | ctor = Type.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic,
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139 | null, Type.EmptyTypes, null);
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140 | if (ctor != null) {
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141 | DynamicMethod dm = new DynamicMethod("", typeof(object), null, Type, true);
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142 | ILGenerator ilgen = dm.GetILGenerator();
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143 | ilgen.Emit(OpCodes.Newobj, ctor);
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144 | ilgen.Emit(OpCodes.Ret);
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145 | constructor = (Func<object>)dm.CreateDelegate(typeof(Func<object>));
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146 | return constructor;
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147 | }
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148 |
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149 | throw new Exception("No storable constructor or parameterless constructor found.");
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150 | }
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151 | }
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152 | }
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