SurrogateDataContract.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / Serialization / System / Runtime / Serialization / SurrogateDataContract.cs / 1305376 / SurrogateDataContract.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace System.Runtime.Serialization
{ 
    using System;
    using System.Security; 
    using System.Security.Permissions; 
    using System.Runtime.CompilerServices;
 
#if USE_REFEMIT
    public sealed class SurrogateDataContract : DataContract
#else
    internal sealed class SurrogateDataContract : DataContract 
#endif
    { 
        [Fx.Tag.SecurityNote(Critical = "Holds instance of CriticalHelper which keeps state that is cached statically for serialization." 
            + " Static fields are marked SecurityCritical or readonly to prevent data from being modified or leaked to other components in appdomain.")]
        [SecurityCritical] 
        SurrogateDataContractCriticalHelper helper;

        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.",
            Safe = "Doesn't leak anything.")] 
        [SecuritySafeCritical]
        internal SurrogateDataContract(Type type, ISerializationSurrogate serializationSurrogate) : base(new SurrogateDataContractCriticalHelper(type, serializationSurrogate)) 
        { 
            helper = base.Helper as SurrogateDataContractCriticalHelper;
        } 

        internal ISerializationSurrogate SerializationSurrogate
        {
            [Fx.Tag.SecurityNote(Critical = "Fetches the critical serializationSurrogate property.", 
                Safe = "serializationSurrogate only needs to be protected for write.")]
            [SecuritySafeCritical] 
            get { return helper.SerializationSurrogate; } 
        }
 
        public override void WriteXmlValue(XmlWriterDelegator xmlWriter, object obj, XmlObjectSerializerWriteContext context)
        {
            SerializationInfo serInfo = new SerializationInfo(UnderlyingType, XmlObjectSerializer.FormatterConverter);
            SerializationSurrogateGetObjectData(obj, serInfo, context.GetStreamingContext()); 
            context.WriteSerializationInfo(xmlWriter, UnderlyingType, serInfo);
        } 
 
        [Fx.Tag.SecurityNote(Critical = "Calls the critical methods of ISurrogateSelector", Safe = "Demands for FullTrust")]
        [SecuritySafeCritical] 
        [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
        [MethodImpl(MethodImplOptions.NoInlining)]
        object SerializationSurrogateSetObjectData(object obj, SerializationInfo serInfo, StreamingContext context)
        { 
            return SerializationSurrogate.SetObjectData(obj, serInfo, context, null);
        } 
 
        [Fx.Tag.SecurityNote(Critical = "Calls the critical methods of IObjectReference", Safe = "Demands for FullTrust")]
        [SecuritySafeCritical] 
        [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
        [MethodImpl(MethodImplOptions.NoInlining)]
        internal static object GetRealObject(IObjectReference obj, StreamingContext context)
        { 
            return obj.GetRealObject(context);
        } 
 
        [Fx.Tag.SecurityNote(Critical = "Calls the critical methods of FormatterServices", Safe = "Demands for FullTrust")]
        [SecuritySafeCritical] 
        [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
        [MethodImpl(MethodImplOptions.NoInlining)]
        object GetUninitializedObject(Type objType)
        { 
            return FormatterServices.GetUninitializedObject(objType);
        } 
 
        [Fx.Tag.SecurityNote(Critical = "Calls the critical methods of ISerializationSurrogate", Safe = "Demands for FullTrust")]
        [SecuritySafeCritical] 
        [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
        [MethodImpl(MethodImplOptions.NoInlining)]
        void SerializationSurrogateGetObjectData(object obj, SerializationInfo serInfo, StreamingContext context)
        { 
            SerializationSurrogate.GetObjectData(obj, serInfo, context);
        } 
 
        public override object ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
        { 
            xmlReader.Read();
            Type objType = UnderlyingType;
            object obj = objType.IsArray ? Array.CreateInstance(objType.GetElementType(), 0) : GetUninitializedObject(objType);
            context.AddNewObject(obj); 
            string objectId = context.GetObjectId();
            SerializationInfo serInfo = context.ReadSerializationInfo(xmlReader, objType); 
            object newObj = SerializationSurrogateSetObjectData(obj, serInfo, context.GetStreamingContext()); 
            if (newObj == null)
                newObj = obj; 
            if (newObj is IDeserializationCallback)
                ((IDeserializationCallback)newObj).OnDeserialization(null);
            if (newObj is IObjectReference)
                newObj = GetRealObject((IObjectReference)newObj, context.GetStreamingContext()); 
            context.ReplaceDeserializedObject(objectId, obj, newObj);
            xmlReader.ReadEndElement(); 
            return newObj; 
        }
 
        [Fx.Tag.SecurityNote(Critical = "Holds all state used for for (de)serializing with ISerializationSurrogate."
            + " Since it accesses data on the base type that is cached statically, we lock down access to it.")]
        [SecurityCritical(SecurityCriticalScope.Everything)]
        class SurrogateDataContractCriticalHelper : DataContract.DataContractCriticalHelper 
        {
            ISerializationSurrogate serializationSurrogate; 
 
            internal SurrogateDataContractCriticalHelper(Type type, ISerializationSurrogate serializationSurrogate) : base(type)
            { 
                this.serializationSurrogate = serializationSurrogate;
                string name, ns;
                DataContract.GetDefaultStableName(DataContract.GetClrTypeFullName(type), out name, out ns);
                SetDataContractName(CreateQualifiedName(name, ns)); 
            }
 
            internal ISerializationSurrogate SerializationSurrogate 
            {
                get { return serializationSurrogate; } 
            }
        }
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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