SurrogateDataContract.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / Serialization / System / Runtime / Serialization / SurrogateDataContract.cs / 2 / SurrogateDataContract.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace System.Runtime.Serialization
{ 
    using System;
    using System.Reflection; 
    using System.Xml; 
    using DataContractDictionary=System.Collections.Generic.Dictionary;
    using System.Xml.Serialization; 
    using System.Security;

    internal sealed class SurrogateDataContract : DataContract
    { 
        /// 
        /// 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;

        ///  
        /// Critical - initializes SecurityCritical field 'helper'
        /// Safe - doesn't leak anything 
        ///  
        [SecurityCritical, SecurityTreatAsSafe]
        internal SurrogateDataContract(Type type, ISerializationSurrogate serializationSurrogate) : base(new SurrogateDataContractCriticalHelper(type, serializationSurrogate)) 
        {
            helper = base.Helper as SurrogateDataContractCriticalHelper;
        }
 
        internal ISerializationSurrogate SerializationSurrogate
        { 
            ///  
            /// Critical - fetches the critical serializationSurrogate field
            /// Safe - serializationSurrogate only needs to be protected for write 
            /// 
            [SecurityCritical, SecurityTreatAsSafe]
            get { return helper.SerializationSurrogate; }
        } 

        public override void WriteXmlValue(XmlWriterDelegator xmlWriter, object obj, XmlObjectSerializerWriteContext context) 
        { 
            SerializationInfo serInfo = new SerializationInfo(UnderlyingType, XmlObjectSerializer.FormatterConverter);
            SerializationSurrogate.GetObjectData(obj, serInfo, context.GetStreamingContext()); 
            context.WriteSerializationInfo(xmlWriter, UnderlyingType, serInfo);
        }

        public override object ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context) 
        {
            xmlReader.Read(); 
            Type objType = UnderlyingType; 
            object obj = objType.IsArray ? Array.CreateInstance(objType.GetElementType(), 0) : FormatterServices.GetUninitializedObject(objType);
            context.AddNewObject(obj); 
            string objectId = context.GetObjectId();
            SerializationInfo serInfo = context.ReadSerializationInfo(xmlReader, objType);
            object newObj = SerializationSurrogate.SetObjectData(obj, serInfo, context.GetStreamingContext(), null);
            if (newObj == null) 
                newObj = obj;
            if (newObj is IDeserializationCallback) 
                ((IDeserializationCallback)newObj).OnDeserialization(null); 
            if (newObj is IObjectReference)
                newObj = ((IObjectReference)newObj).GetRealObject(context.GetStreamingContext()); 
            context.ReplaceDeserializedObject(objectId, obj, newObj);
            xmlReader.ReadEndElement();
            return newObj;
        } 

        ///  
        /// 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.
// Copyright (c) Microsoft Corporation. All rights reserved.

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK