JsonEnumDataContract.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 / Json / JsonEnumDataContract.cs / 1305376 / JsonEnumDataContract.cs

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

namespace System.Runtime.Serialization.Json 
{
    using System.Xml; 
    using System.Security; 

    class JsonEnumDataContract : JsonDataContract 
    {
        [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] 
        JsonEnumDataContractCriticalHelper helper;
 
        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.", 
            Safe = "Doesn't leak anything.")]
        [SecuritySafeCritical] 
        public JsonEnumDataContract(EnumDataContract traditionalDataContract) : base(new JsonEnumDataContractCriticalHelper(traditionalDataContract))
        {
            this.helper = base.Helper as JsonEnumDataContractCriticalHelper;
        } 

        public bool IsULong 
        { 
            [Fx.Tag.SecurityNote(Critical = "Fetches the critical IsULong property.",
                Safe = "IsULong only needs to be protected for write.")] 
            [SecuritySafeCritical]
            get { return this.helper.IsULong; }
        }
 
        public override object ReadJsonValueCore(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context)
        { 
            object enumValue; 
            if (IsULong)
            { 
                enumValue = Enum.ToObject(TraditionalDataContract.UnderlyingType, jsonReader.ReadElementContentAsUnsignedLong());
            }
            else
            { 
                enumValue = Enum.ToObject(TraditionalDataContract.UnderlyingType, jsonReader.ReadElementContentAsLong());
            } 
 
            if (context != null)
            { 
                context.AddNewObject(enumValue);
            }
            return enumValue;
        } 

        public override void WriteJsonValueCore(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle) 
        { 
            if (IsULong)
            { 
                jsonWriter.WriteUnsignedLong(((IConvertible) obj).ToUInt64(null));
            }
            else
            { 
                jsonWriter.WriteLong(((IConvertible) obj).ToInt64(null));
            } 
        } 

        [Fx.Tag.SecurityNote(Critical = "Holds all state used for (de)serializing types." 
            + "Since the data is cached statically, we lock down access to it.")]
#pragma warning disable 618 // have not moved to the v4 security model yet
        [SecurityCritical(SecurityCriticalScope.Everything)]
#pragma warning restore 618 
        class JsonEnumDataContractCriticalHelper : JsonDataContractCriticalHelper
        { 
            bool isULong; 

            public JsonEnumDataContractCriticalHelper(EnumDataContract traditionalEnumDataContract) : base(traditionalEnumDataContract) 
            {
                isULong = traditionalEnumDataContract.IsULong;
            }
 
            public bool IsULong
            { 
                get { return this.isULong; } 
            }
        } 
    }
}

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

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