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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 | #region License/* FNA - XNA4 Reimplementation for Desktop Platforms * Copyright 2009-2016 Ethan Lee and the MonoGame Team * * Released under the Microsoft Public License. * See LICENSE for details. */#endregion#region Using Statementsusing System;using System.Collections.Generic;using System.Linq;using System.Reflection;#endregionnamespace Microsoft.Xna.Framework.Content{ internal class ReflectiveReader<T> : ContentTypeReader { #region Reader Delegates delegate void ReadElement(ContentReader input, object parent); private List<ReadElement> readers; #endregion #region Public Properties public override bool CanDeserializeIntoExistingObject { get { return TargetType.IsClass; } } #endregion #region Private Variables private ConstructorInfo constructor; private ContentTypeReader baseTypeReader; #endregion #region Internal Constructor internal ReflectiveReader() : base(typeof(T)) { } #endregion #region Protected ContentTypeReader Methods protected internal override void Initialize(ContentTypeReaderManager manager) { base.Initialize(manager); Type baseType = TargetType.BaseType; if (baseType != null && baseType != typeof(object)) { baseTypeReader = manager.GetTypeReader(baseType); } constructor = TargetType.GetDefaultConstructor(); PropertyInfo[] properties = TargetType.GetAllProperties(); FieldInfo[] fields = TargetType.GetAllFields(); readers = new List<ReadElement>(fields.Length + properties.Length); // Gather the properties. foreach (PropertyInfo property in properties) { ReadElement read = GetElementReader(manager, property); if (read != null) { readers.Add(read); } } // Gather the fields. foreach (FieldInfo field in fields) { ReadElement read = GetElementReader(manager, field); if (read != null) { readers.Add(read); } } } protected internal override object Read(ContentReader input, object existingInstance) { T obj; if (existingInstance != null) { obj = (T) existingInstance; } else { if (constructor == null) { obj = (T) Activator.CreateInstance(typeof(T)); } else { obj = (T) constructor.Invoke(null); } } if (baseTypeReader != null) { baseTypeReader.Read(input, obj); } // Box the type. object boxed = (object) obj; foreach (ReadElement reader in readers) { reader(input, boxed); } // Unbox it... required for value types. obj = (T) boxed; return obj; } #endregion #region Private Static Methods private static ReadElement GetElementReader( ContentTypeReaderManager manager, MemberInfo member ) { PropertyInfo property = member as PropertyInfo; FieldInfo field = member as FieldInfo; // Properties must have public get and set if ( property != null && ( property.CanWrite == false || property.CanRead == false ) ) { return null; } if (property != null) { // Properties must have at least a getter. if (property.CanRead == false) { return null; } // Skip over indexer properties if (property.GetIndexParameters().Any()) { return null; } } // Are we explicitly asked to ignore this item? Attribute attr = Attribute.GetCustomAttribute( member, typeof(ContentSerializerIgnoreAttribute) ); if (attr != null) { return null; } ContentSerializerAttribute contentSerializerAttribute = Attribute.GetCustomAttribute( member, typeof(ContentSerializerAttribute) ) as ContentSerializerAttribute; if (contentSerializerAttribute == null) { if (property != null) { /* There is no ContentSerializerAttribute, so non-public * properties cannot be deserialized. */ MethodInfo getMethod = property.GetGetMethod(true); if (getMethod != null && !getMethod.IsPublic) { return null; } MethodInfo setMethod = property.GetSetMethod(true); if (setMethod != null && !setMethod.IsPublic) { return null; } /* If the read-only property has a type reader, * and CanDeserializeIntoExistingObject is true, * then it is safe to deserialize into the existing object. */ if (!property.CanWrite) { ContentTypeReader typeReader = manager.GetTypeReader(property.PropertyType); if (typeReader == null || !typeReader.CanDeserializeIntoExistingObject) { return null; } } } else { /* There is no ContentSerializerAttribute, so non-public * fields cannot be deserialized. */ if (!field.IsPublic) { return null; } // evolutional: Added check to skip initialise only fields if (field.IsInitOnly) { return null; } } } Action<object, object> setter; Type elementType; if (property != null) { elementType = property.PropertyType; if (property.CanWrite) { setter = (o, v) => property.SetValue(o, v, null); } else { setter = (o, v) => { }; } } else { elementType = field.FieldType; setter = field.SetValue; } if ( contentSerializerAttribute != null && contentSerializerAttribute.SharedResource ) { return (input, parent) => { Action<object> action = value => setter(parent, value); input.ReadSharedResource(action); }; } // We need to have a reader at this point. ContentTypeReader reader = manager.GetTypeReader(elementType); if (reader == null) { throw new ContentLoadException(string.Format( "Content reader could not be found for {0} type.", elementType.FullName )); } /* We use the construct delegate to pick the correct existing * object to be the target of deserialization. */ Func<object, object> construct = parent => null; if (property != null && !property.CanWrite) { construct = parent => property.GetValue(parent, null); } return (input, parent) => { object existing = construct(parent); object obj2 = input.ReadObject(reader, existing); setter(parent, obj2); }; } #endregion }} |
