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   1 // Licensed to the .NET Foundation under one or more agreements.
   2 // The .NET Foundation licenses this file to you under the MIT license.
   3 // See the LICENSE file in the project root for more information
   4
   5 namespace System.Runtime.Serialization
   6 {
   7     using System;
   8     using System.Security;
   9     using System.Security.Permissions;
  10     using System.Runtime.CompilerServices;
  11
  12     internal sealed class SurrogateDataContract : DataContract
  13     {
  14         private SurrogateDataContractCriticalHelper _helper;
  15
  16         internal SurrogateDataContract(Type type, ISerializationSurrogate serializationSurrogate)
  17             : base(new SurrogateDataContractCriticalHelper(type, serializationSurrogate))
  18         {
  19             _helper = base.Helper as SurrogateDataContractCriticalHelper;
  20         }
  21
  22         internal ISerializationSurrogate SerializationSurrogate
  23         {
  24             get { return _helper.SerializationSurrogate; }
  25         }
  26
  27         public override void WriteXmlValue(XmlWriterDelegator xmlWriter, object obj, XmlObjectSerializerWriteContext context)
  28         {
  29             SerializationInfo serInfo = new SerializationInfo(UnderlyingType, XmlObjectSerializer.FormatterConverter, !context.UnsafeTypeForwardingEnabled);
  30             SerializationSurrogateGetObjectData(obj, serInfo, context.GetStreamingContext());
  31             context.WriteSerializationInfo(xmlWriter, UnderlyingType, serInfo);
  32         }
  33
  34         [MethodImpl(MethodImplOptions.NoInlining)]
  35         private object SerializationSurrogateSetObjectData(object obj, SerializationInfo serInfo, StreamingContext context)
  36         {
  37             return SerializationSurrogate.SetObjectData(obj, serInfo, context, null);
  38         }
  39
  40         [MethodImpl(MethodImplOptions.NoInlining)]
  41         internal static object GetRealObject(IObjectReference obj, StreamingContext context)
  42         {
  43             return obj.GetRealObject(context);
  44         }
  45
  46         [MethodImpl(MethodImplOptions.NoInlining)]
  47         private object GetUninitializedObject(Type objType)
  48         {
  49             return FormatterServices.GetUninitializedObject(objType);
  50         }
  51
  52         [MethodImpl(MethodImplOptions.NoInlining)]
  53         private void SerializationSurrogateGetObjectData(object obj, SerializationInfo serInfo, StreamingContext context)
  54         {
  55             SerializationSurrogate.GetObjectData(obj, serInfo, context);
  56         }
  57
  58         public override object ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
  59         {
  60             xmlReader.Read();
  61             Type objType = UnderlyingType;
  62             object obj = objType.IsArray ? Array.CreateInstance(objType.GetElementType(), 0) : GetUninitializedObject(objType);
  63             context.AddNewObject(obj);
  64             string objectId = context.GetObjectId();
  65             SerializationInfo serInfo = context.ReadSerializationInfo(xmlReader, objType);
  66             object newObj = SerializationSurrogateSetObjectData(obj, serInfo, context.GetStreamingContext());
  67             if (newObj == null)
  68                 newObj = obj;
  69             if (newObj is IDeserializationCallback)
  70                 ((IDeserializationCallback)newObj).OnDeserialization(null);
  71             if (newObj is IObjectReference)
  72                 newObj = GetRealObject((IObjectReference)newObj, context.GetStreamingContext());
  73             context.ReplaceDeserializedObject(objectId, obj, newObj);
  74             xmlReader.ReadEndElement();
  75             return newObj;
  76         }
  77
  78         private class SurrogateDataContractCriticalHelper : DataContract.DataContractCriticalHelper
  79         {
  80             ISerializationSurrogate serializationSurrogate;
  81
  82             internal SurrogateDataContractCriticalHelper(Type type, ISerializationSurrogate serializationSurrogate)
  83                 : base(type)
  84             {
  85                 this.serializationSurrogate = serializationSurrogate;
  86                 string name, ns;
  87                 DataContract.GetDefaultStableName(DataContract.GetClrTypeFullName(type), out name, out ns);
  88                 SetDataContractName(CreateQualifiedName(name, ns));
  89             }
  90
  91             internal ISerializationSurrogate SerializationSurrogate
  92             {
  93                 get { return serializationSurrogate; }
  94             }
  95         }
  96     }
  97 }