JsonCollectionDataContract.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / Serialization / System / Runtime / Serialization / Json / JsonCollectionDataContract.cs / 1305376 / JsonCollectionDataContract.cs
                        
                        
                            //---------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------

namespace System.Runtime.Serialization.Json 
{
    using System.Threading; 
    using System.Xml; 
    using System.Security;
 
    class JsonCollectionDataContract : 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]
        JsonCollectionDataContractCriticalHelper helper; 
 
        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.",
            Safe = "Doesn't leak anything.")] 
        [SecuritySafeCritical]
        public JsonCollectionDataContract(CollectionDataContract traditionalDataContract) : base(new JsonCollectionDataContractCriticalHelper(traditionalDataContract))
        {
            this.helper = base.Helper as JsonCollectionDataContractCriticalHelper; 
        }
 
        internal JsonFormatCollectionReaderDelegate JsonFormatReaderDelegate 
        {
            [Fx.Tag.SecurityNote(Critical = "Fetches the critical JsonFormatReaderDelegate property.", 
                Safe = "JsonFormatReaderDelegate only needs to be protected for write.")]
            [SecuritySafeCritical]
            get
            { 
                if (helper.JsonFormatReaderDelegate == null)
                { 
                    lock (this) 
                    {
                        if (helper.JsonFormatReaderDelegate == null) 
                        {
                            JsonFormatCollectionReaderDelegate tempDelegate = new JsonFormatReaderGenerator().GenerateCollectionReader(TraditionalCollectionDataContract);
                            Thread.MemoryBarrier();
                            helper.JsonFormatReaderDelegate = tempDelegate; 
                        }
                    } 
                } 
                return helper.JsonFormatReaderDelegate;
            } 
        }

        internal JsonFormatGetOnlyCollectionReaderDelegate JsonFormatGetOnlyReaderDelegate
        { 
            [Fx.Tag.SecurityNote(Critical = "Fetches the critical JsonFormatGetOnlyReaderDelegate property.",
                Safe = "JsonFormatGetOnlyReaderDelegate only needs to be protected for write; initialized in getter if null.")] 
            [SecuritySafeCritical] 
            get
            { 
                if (helper.JsonFormatGetOnlyReaderDelegate == null)
                {
                    lock (this)
                    { 
                        if (helper.JsonFormatGetOnlyReaderDelegate == null)
                        { 
                            JsonFormatGetOnlyCollectionReaderDelegate tempDelegate = new JsonFormatReaderGenerator().GenerateGetOnlyCollectionReader(TraditionalCollectionDataContract); 
                            Thread.MemoryBarrier();
                            helper.JsonFormatGetOnlyReaderDelegate = tempDelegate; 
                        }
                    }
                }
                return helper.JsonFormatGetOnlyReaderDelegate; 
            }
        } 
 
        internal JsonFormatCollectionWriterDelegate JsonFormatWriterDelegate
        { 
            [Fx.Tag.SecurityNote(Critical = "Fetches the critical JsonFormatWriterDelegate property.",
                Safe = "JsonFormatWriterDelegate only needs to be protected for write.")]
            [SecuritySafeCritical]
            get 
            {
                if (helper.JsonFormatWriterDelegate == null) 
                { 
                    lock (this)
                    { 
                        if (helper.JsonFormatWriterDelegate == null)
                        {
                            JsonFormatCollectionWriterDelegate tempDelegate = new JsonFormatWriterGenerator().GenerateCollectionWriter(TraditionalCollectionDataContract);
                            Thread.MemoryBarrier(); 
                            helper.JsonFormatWriterDelegate = tempDelegate;
                        } 
                    } 
                }
                return helper.JsonFormatWriterDelegate; 
            }
        }

        CollectionDataContract TraditionalCollectionDataContract 
        {
            [Fx.Tag.SecurityNote(Critical = "Fetches the critical TraditionalCollectionDataContract property.", 
                Safe = "TraditionalCollectionDataContract only needs to be protected for write.")] 
            [SecuritySafeCritical]
            get { return this.helper.TraditionalCollectionDataContract; } 
        }

        public override object ReadJsonValueCore(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context)
        { 
            jsonReader.Read();
            object o = null; 
            if (context.IsGetOnlyCollection) 
            {
                // IsGetOnlyCollection value has already been used to create current collectiondatacontract, value can now be reset. 
                context.IsGetOnlyCollection = false;
                JsonFormatGetOnlyReaderDelegate(jsonReader, context, XmlDictionaryString.Empty, JsonGlobals.itemDictionaryString, TraditionalCollectionDataContract);
            }
            else 
            {
                o = JsonFormatReaderDelegate(jsonReader, context, XmlDictionaryString.Empty, JsonGlobals.itemDictionaryString, TraditionalCollectionDataContract); 
            } 
            jsonReader.ReadEndElement();
            return o; 
        }

        public override void WriteJsonValueCore(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
        { 
            // IsGetOnlyCollection value has already been used to create current collectiondatacontract, value can now be reset.
            context.IsGetOnlyCollection = false; 
            JsonFormatWriterDelegate(jsonWriter, obj, context, TraditionalCollectionDataContract); 
        }
 
        [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 JsonCollectionDataContractCriticalHelper : JsonDataContractCriticalHelper 
        { 
            JsonFormatCollectionReaderDelegate jsonFormatReaderDelegate;
            JsonFormatGetOnlyCollectionReaderDelegate jsonFormatGetOnlyReaderDelegate; 
            JsonFormatCollectionWriterDelegate jsonFormatWriterDelegate;
            CollectionDataContract traditionalCollectionDataContract;

            public JsonCollectionDataContractCriticalHelper(CollectionDataContract traditionalDataContract) : base(traditionalDataContract) 
            {
                this.traditionalCollectionDataContract = traditionalDataContract; 
            } 

            internal JsonFormatCollectionReaderDelegate JsonFormatReaderDelegate 
            {
                get { return this.jsonFormatReaderDelegate; }
                set { this.jsonFormatReaderDelegate = value; }
            } 

            internal JsonFormatGetOnlyCollectionReaderDelegate JsonFormatGetOnlyReaderDelegate 
            { 
                get { return this.jsonFormatGetOnlyReaderDelegate; }
                set { this.jsonFormatGetOnlyReaderDelegate = value; } 
            }

            internal JsonFormatCollectionWriterDelegate JsonFormatWriterDelegate
            { 
                get { return this.jsonFormatWriterDelegate; }
                set { this.jsonFormatWriterDelegate = value; } 
            } 

            internal CollectionDataContract TraditionalCollectionDataContract 
            {
                get { return this.traditionalCollectionDataContract; }
            }
 
        }
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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JsonCollectionDataContract.cs source code in C# .NET

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