JsonDataContract.cs source code in C# .NET

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

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

namespace System.Runtime.Serialization.Json 
{
    using System.Collections.Generic; 
    using System.Runtime; 
    using System.Runtime.Serialization;
    using System.Security; 
    using System.Reflection;
    using System.ServiceModel;
    using System.Xml;
 
#if USE_REFEMIT
    public class JsonDataContract 
#else 
    class JsonDataContract
#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] 
        JsonDataContractCriticalHelper helper;
 
        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.", 
            Safe = "Doesn't leak anything.")]
        [SecuritySafeCritical] 
        protected JsonDataContract(DataContract traditionalDataContract)
        {
            this.helper = new JsonDataContractCriticalHelper(traditionalDataContract);
        } 

        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.", 
            Safe = "Doesn't leak anything.")] 
        [SecuritySafeCritical]
        protected JsonDataContract(JsonDataContractCriticalHelper helper) 
        {
            this.helper = helper;
        }
 
        internal virtual string TypeName
        { 
            get { return null; } 
        }
 
        protected JsonDataContractCriticalHelper Helper
        {
            [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]
            get { return helper; } 
        } 

        protected DataContract TraditionalDataContract 
        {
            [Fx.Tag.SecurityNote(Critical = "Fetches the critical TraditionalDataContract from the helper.",
                Safe = "TraditionalDataContract only needs to be protected for write.")]
            [SecuritySafeCritical] 
            get { return this.helper.TraditionalDataContract; }
        } 
 
        Dictionary KnownDataContracts
        { 
            [Fx.Tag.SecurityNote(Critical = "Fetches the critical KnownDataContracts from the helper.",
                Safe = "KnownDataContracts only needs to be protected for write.")]
            [SecuritySafeCritical]
            get { return this.helper.KnownDataContracts; } 
        }
 
        [Fx.Tag.SecurityNote(Critical = "Fetches the critical JsonDataContract from the helper.", 
            Safe = "JsonDataContract only needs to be protected for write.")]
        [SecuritySafeCritical] 
        public static JsonDataContract GetJsonDataContract(DataContract traditionalDataContract)
        {
            return JsonDataContractCriticalHelper.GetJsonDataContract(traditionalDataContract);
        } 

        public object ReadJsonValue(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context) 
        { 
            PushKnownDataContracts(context);
            object deserializedObject = ReadJsonValueCore(jsonReader, context); 
            PopKnownDataContracts(context);
            return deserializedObject;
        }
 
        public virtual object ReadJsonValueCore(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context)
        { 
            return TraditionalDataContract.ReadXmlValue(jsonReader, context); 
        }
 
        public void WriteJsonValue(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
        {
            PushKnownDataContracts(context);
            WriteJsonValueCore(jsonWriter, obj, context, declaredTypeHandle); 
            PopKnownDataContracts(context);
        } 
 
        public virtual void WriteJsonValueCore(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
        { 
            TraditionalDataContract.WriteXmlValue(jsonWriter, obj, context);
        }

        protected static object HandleReadValue(object obj, XmlObjectSerializerReadContext context) 
        {
            context.AddNewObject(obj); 
            return obj; 
        }
 
        protected static bool TryReadNullAtTopLevel(XmlReaderDelegator reader)
        {
            while (reader.MoveToAttribute(JsonGlobals.typeString) && (reader.Value == JsonGlobals.nullString))
            { 
                reader.Skip();
                reader.MoveToElement(); 
                return true; 
            }
 
            reader.MoveToElement();
            return false;
        }
 
        protected void PopKnownDataContracts(XmlObjectSerializerContext context)
        { 
            if (KnownDataContracts != null) 
            {
                context.scopedKnownTypes.Pop(); 
            }
        }

        protected void PushKnownDataContracts(XmlObjectSerializerContext context) 
        {
            if (KnownDataContracts != null) 
            { 
                context.scopedKnownTypes.Push(KnownDataContracts);
            } 
        }

        [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 
        internal class JsonDataContractCriticalHelper
        { 

            static object cacheLock = new object();
            static object createDataContractLock = new object();
 
            static JsonDataContract[] dataContractCache = new JsonDataContract[32];
            static int dataContractID = 0; 
 
            static TypeHandleRef typeHandleRef = new TypeHandleRef();
            static Dictionary typeToIDCache = new Dictionary(new TypeHandleRefEqualityComparer()); 
            Dictionary knownDataContracts;
            DataContract traditionalDataContract;
            string typeName;
 
            internal JsonDataContractCriticalHelper(DataContract traditionalDataContract)
            { 
                this.traditionalDataContract = traditionalDataContract; 
                AddCollectionItemContractsToKnownDataContracts();
                this.typeName = string.IsNullOrEmpty(traditionalDataContract.Namespace.Value) ? traditionalDataContract.Name.Value : string.Concat(traditionalDataContract.Name.Value, JsonGlobals.NameValueSeparatorString, XmlObjectSerializerWriteContextComplexJson.TruncateDefaultDataContractNamespace(traditionalDataContract.Namespace.Value)); 
            }

            internal Dictionary KnownDataContracts
            { 
                get { return this.knownDataContracts; }
            } 
 
            internal DataContract TraditionalDataContract
            { 
                get { return this.traditionalDataContract; }
            }

            internal virtual string TypeName 
            {
                get { return this.typeName; } 
            } 

            public static JsonDataContract GetJsonDataContract(DataContract traditionalDataContract) 
            {
                int id = JsonDataContractCriticalHelper.GetId(traditionalDataContract.UnderlyingType.TypeHandle);
                JsonDataContract dataContract = dataContractCache[id];
                if (dataContract == null) 
                {
                    dataContract = CreateJsonDataContract(id, traditionalDataContract); 
                    dataContractCache[id] = dataContract; 
                }
                return dataContract; 
            }

            internal static int GetId(RuntimeTypeHandle typeHandle)
            { 
                lock (cacheLock)
                { 
                    IntRef id; 
                    typeHandleRef.Value = typeHandle;
                    if (!typeToIDCache.TryGetValue(typeHandleRef, out id)) 
                    {
                        int value = dataContractID++;
                        if (value >= dataContractCache.Length)
                        { 
                            int newSize = (value < Int32.MaxValue / 2) ? value * 2 : Int32.MaxValue;
                            if (newSize <= value) 
                            { 
                                Fx.Assert("DataContract cache overflow");
                                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SerializationException(System.Runtime.Serialization.SR.GetString(System.Runtime.Serialization.SR.DataContractCacheOverflow))); 
                            }
                            Array.Resize(ref dataContractCache, newSize);
                        }
                        id = new IntRef(value); 
                        try
                        { 
                            typeToIDCache.Add(new TypeHandleRef(typeHandle), id); 
                        }
                        catch (Exception ex) 
                        {
                            if (Fx.IsFatal(ex))
                            {
                                throw; 
                            }
                            throw DiagnosticUtility.ExceptionUtility.ThrowHelperFatal(ex.Message, ex); 
                        } 
                    }
                    return id.Value; 
                }
            }

            static JsonDataContract CreateJsonDataContract(int id, DataContract traditionalDataContract) 
            {
                lock (createDataContractLock) 
                { 
                    JsonDataContract dataContract = dataContractCache[id];
                    if (dataContract == null) 
                    {
                        Type traditionalDataContractType = traditionalDataContract.GetType();
                        if (traditionalDataContractType == typeof(ObjectDataContract))
                        { 
                            dataContract = new JsonObjectDataContract(traditionalDataContract);
                        } 
                        else if (traditionalDataContractType == typeof(StringDataContract)) 
                        {
                            dataContract = new JsonStringDataContract((StringDataContract) traditionalDataContract); 
                        }
                        else if (traditionalDataContractType == typeof(UriDataContract))
                        {
                            dataContract = new JsonUriDataContract((UriDataContract) traditionalDataContract); 
                        }
                        else if (traditionalDataContractType == typeof(QNameDataContract)) 
                        { 
                            dataContract = new JsonQNameDataContract((QNameDataContract) traditionalDataContract);
                        } 
                        else if (traditionalDataContractType == typeof(ByteArrayDataContract))
                        {
                            dataContract = new JsonByteArrayDataContract((ByteArrayDataContract) traditionalDataContract);
                        } 
                        else if (traditionalDataContract.IsPrimitive ||
                            traditionalDataContract.UnderlyingType == Globals.TypeOfXmlQualifiedName) 
                        { 
                            dataContract = new JsonDataContract(traditionalDataContract);
                        } 
                        else if (traditionalDataContractType == typeof(ClassDataContract))
                        {
                            dataContract = new JsonClassDataContract((ClassDataContract) traditionalDataContract);
                        } 
                        else if (traditionalDataContractType == typeof(EnumDataContract))
                        { 
                            dataContract = new JsonEnumDataContract((EnumDataContract) traditionalDataContract); 
                        }
                        else if ((traditionalDataContractType == typeof(GenericParameterDataContract)) || 
                            (traditionalDataContractType == typeof(SpecialTypeDataContract)))
                        {
                            dataContract = new JsonDataContract(traditionalDataContract);
                        } 
                        else if (traditionalDataContractType == typeof(CollectionDataContract))
                        { 
                            dataContract = new JsonCollectionDataContract((CollectionDataContract) traditionalDataContract); 
                        }
                        else if (traditionalDataContractType == typeof(XmlDataContract)) 
                        {
                            dataContract = new JsonXmlDataContract((XmlDataContract) traditionalDataContract);
                        }
                        else 
                        {
                            throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("traditionalDataContract", 
                                SR.GetString(SR.JsonTypeNotSupportedByDataContractJsonSerializer, traditionalDataContract.UnderlyingType)); 
                        }
                    } 
                    return dataContract;
                }
            }
 
            void AddCollectionItemContractsToKnownDataContracts()
            { 
                if (traditionalDataContract.KnownDataContracts != null) 
                {
                    foreach (KeyValuePair knownDataContract in traditionalDataContract.KnownDataContracts) 
                    {
                        if (!object.ReferenceEquals(knownDataContract, null))
                        {
                            CollectionDataContract collectionDataContract = knownDataContract.Value as CollectionDataContract; 
                            while (collectionDataContract != null)
                            { 
                                DataContract itemContract = collectionDataContract.ItemContract; 
                                if (knownDataContracts == null)
                                { 
                                    knownDataContracts = new Dictionary();
                                }

                                if (!knownDataContracts.ContainsKey(itemContract.StableName)) 
                                {
                                    knownDataContracts.Add(itemContract.StableName, itemContract); 
                                } 

                                if (collectionDataContract.ItemType.IsGenericType 
                                    && collectionDataContract.ItemType.GetGenericTypeDefinition() == typeof(KeyValue <, > ))
                                {
                                    DataContract itemDataContract = DataContract.GetDataContract(Globals.TypeOfKeyValuePair.MakeGenericType(collectionDataContract.ItemType.GetGenericArguments()));
                                    if (!knownDataContracts.ContainsKey(itemDataContract.StableName)) 
                                    {
                                        knownDataContracts.Add(itemDataContract.StableName, itemDataContract); 
                                    } 
                                }
 
                                if (!(itemContract is CollectionDataContract))
                                {
                                    break;
                                } 
                                collectionDataContract = itemContract as CollectionDataContract;
                            } 
                        } 
                    }
                } 
            }
        }

    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------

namespace System.Runtime.Serialization.Json 
{
    using System.Collections.Generic; 
    using System.Runtime; 
    using System.Runtime.Serialization;
    using System.Security; 
    using System.Reflection;
    using System.ServiceModel;
    using System.Xml;
 
#if USE_REFEMIT
    public class JsonDataContract 
#else 
    class JsonDataContract
#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] 
        JsonDataContractCriticalHelper helper;
 
        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.", 
            Safe = "Doesn't leak anything.")]
        [SecuritySafeCritical] 
        protected JsonDataContract(DataContract traditionalDataContract)
        {
            this.helper = new JsonDataContractCriticalHelper(traditionalDataContract);
        } 

        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.", 
            Safe = "Doesn't leak anything.")] 
        [SecuritySafeCritical]
        protected JsonDataContract(JsonDataContractCriticalHelper helper) 
        {
            this.helper = helper;
        }
 
        internal virtual string TypeName
        { 
            get { return null; } 
        }
 
        protected JsonDataContractCriticalHelper Helper
        {
            [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]
            get { return helper; } 
        } 

        protected DataContract TraditionalDataContract 
        {
            [Fx.Tag.SecurityNote(Critical = "Fetches the critical TraditionalDataContract from the helper.",
                Safe = "TraditionalDataContract only needs to be protected for write.")]
            [SecuritySafeCritical] 
            get { return this.helper.TraditionalDataContract; }
        } 
 
        Dictionary KnownDataContracts
        { 
            [Fx.Tag.SecurityNote(Critical = "Fetches the critical KnownDataContracts from the helper.",
                Safe = "KnownDataContracts only needs to be protected for write.")]
            [SecuritySafeCritical]
            get { return this.helper.KnownDataContracts; } 
        }
 
        [Fx.Tag.SecurityNote(Critical = "Fetches the critical JsonDataContract from the helper.", 
            Safe = "JsonDataContract only needs to be protected for write.")]
        [SecuritySafeCritical] 
        public static JsonDataContract GetJsonDataContract(DataContract traditionalDataContract)
        {
            return JsonDataContractCriticalHelper.GetJsonDataContract(traditionalDataContract);
        } 

        public object ReadJsonValue(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context) 
        { 
            PushKnownDataContracts(context);
            object deserializedObject = ReadJsonValueCore(jsonReader, context); 
            PopKnownDataContracts(context);
            return deserializedObject;
        }
 
        public virtual object ReadJsonValueCore(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context)
        { 
            return TraditionalDataContract.ReadXmlValue(jsonReader, context); 
        }
 
        public void WriteJsonValue(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
        {
            PushKnownDataContracts(context);
            WriteJsonValueCore(jsonWriter, obj, context, declaredTypeHandle); 
            PopKnownDataContracts(context);
        } 
 
        public virtual void WriteJsonValueCore(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
        { 
            TraditionalDataContract.WriteXmlValue(jsonWriter, obj, context);
        }

        protected static object HandleReadValue(object obj, XmlObjectSerializerReadContext context) 
        {
            context.AddNewObject(obj); 
            return obj; 
        }
 
        protected static bool TryReadNullAtTopLevel(XmlReaderDelegator reader)
        {
            while (reader.MoveToAttribute(JsonGlobals.typeString) && (reader.Value == JsonGlobals.nullString))
            { 
                reader.Skip();
                reader.MoveToElement(); 
                return true; 
            }
 
            reader.MoveToElement();
            return false;
        }
 
        protected void PopKnownDataContracts(XmlObjectSerializerContext context)
        { 
            if (KnownDataContracts != null) 
            {
                context.scopedKnownTypes.Pop(); 
            }
        }

        protected void PushKnownDataContracts(XmlObjectSerializerContext context) 
        {
            if (KnownDataContracts != null) 
            { 
                context.scopedKnownTypes.Push(KnownDataContracts);
            } 
        }

        [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 
        internal class JsonDataContractCriticalHelper
        { 

            static object cacheLock = new object();
            static object createDataContractLock = new object();
 
            static JsonDataContract[] dataContractCache = new JsonDataContract[32];
            static int dataContractID = 0; 
 
            static TypeHandleRef typeHandleRef = new TypeHandleRef();
            static Dictionary typeToIDCache = new Dictionary(new TypeHandleRefEqualityComparer()); 
            Dictionary knownDataContracts;
            DataContract traditionalDataContract;
            string typeName;
 
            internal JsonDataContractCriticalHelper(DataContract traditionalDataContract)
            { 
                this.traditionalDataContract = traditionalDataContract; 
                AddCollectionItemContractsToKnownDataContracts();
                this.typeName = string.IsNullOrEmpty(traditionalDataContract.Namespace.Value) ? traditionalDataContract.Name.Value : string.Concat(traditionalDataContract.Name.Value, JsonGlobals.NameValueSeparatorString, XmlObjectSerializerWriteContextComplexJson.TruncateDefaultDataContractNamespace(traditionalDataContract.Namespace.Value)); 
            }

            internal Dictionary KnownDataContracts
            { 
                get { return this.knownDataContracts; }
            } 
 
            internal DataContract TraditionalDataContract
            { 
                get { return this.traditionalDataContract; }
            }

            internal virtual string TypeName 
            {
                get { return this.typeName; } 
            } 

            public static JsonDataContract GetJsonDataContract(DataContract traditionalDataContract) 
            {
                int id = JsonDataContractCriticalHelper.GetId(traditionalDataContract.UnderlyingType.TypeHandle);
                JsonDataContract dataContract = dataContractCache[id];
                if (dataContract == null) 
                {
                    dataContract = CreateJsonDataContract(id, traditionalDataContract); 
                    dataContractCache[id] = dataContract; 
                }
                return dataContract; 
            }

            internal static int GetId(RuntimeTypeHandle typeHandle)
            { 
                lock (cacheLock)
                { 
                    IntRef id; 
                    typeHandleRef.Value = typeHandle;
                    if (!typeToIDCache.TryGetValue(typeHandleRef, out id)) 
                    {
                        int value = dataContractID++;
                        if (value >= dataContractCache.Length)
                        { 
                            int newSize = (value < Int32.MaxValue / 2) ? value * 2 : Int32.MaxValue;
                            if (newSize <= value) 
                            { 
                                Fx.Assert("DataContract cache overflow");
                                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SerializationException(System.Runtime.Serialization.SR.GetString(System.Runtime.Serialization.SR.DataContractCacheOverflow))); 
                            }
                            Array.Resize(ref dataContractCache, newSize);
                        }
                        id = new IntRef(value); 
                        try
                        { 
                            typeToIDCache.Add(new TypeHandleRef(typeHandle), id); 
                        }
                        catch (Exception ex) 
                        {
                            if (Fx.IsFatal(ex))
                            {
                                throw; 
                            }
                            throw DiagnosticUtility.ExceptionUtility.ThrowHelperFatal(ex.Message, ex); 
                        } 
                    }
                    return id.Value; 
                }
            }

            static JsonDataContract CreateJsonDataContract(int id, DataContract traditionalDataContract) 
            {
                lock (createDataContractLock) 
                { 
                    JsonDataContract dataContract = dataContractCache[id];
                    if (dataContract == null) 
                    {
                        Type traditionalDataContractType = traditionalDataContract.GetType();
                        if (traditionalDataContractType == typeof(ObjectDataContract))
                        { 
                            dataContract = new JsonObjectDataContract(traditionalDataContract);
                        } 
                        else if (traditionalDataContractType == typeof(StringDataContract)) 
                        {
                            dataContract = new JsonStringDataContract((StringDataContract) traditionalDataContract); 
                        }
                        else if (traditionalDataContractType == typeof(UriDataContract))
                        {
                            dataContract = new JsonUriDataContract((UriDataContract) traditionalDataContract); 
                        }
                        else if (traditionalDataContractType == typeof(QNameDataContract)) 
                        { 
                            dataContract = new JsonQNameDataContract((QNameDataContract) traditionalDataContract);
                        } 
                        else if (traditionalDataContractType == typeof(ByteArrayDataContract))
                        {
                            dataContract = new JsonByteArrayDataContract((ByteArrayDataContract) traditionalDataContract);
                        } 
                        else if (traditionalDataContract.IsPrimitive ||
                            traditionalDataContract.UnderlyingType == Globals.TypeOfXmlQualifiedName) 
                        { 
                            dataContract = new JsonDataContract(traditionalDataContract);
                        } 
                        else if (traditionalDataContractType == typeof(ClassDataContract))
                        {
                            dataContract = new JsonClassDataContract((ClassDataContract) traditionalDataContract);
                        } 
                        else if (traditionalDataContractType == typeof(EnumDataContract))
                        { 
                            dataContract = new JsonEnumDataContract((EnumDataContract) traditionalDataContract); 
                        }
                        else if ((traditionalDataContractType == typeof(GenericParameterDataContract)) || 
                            (traditionalDataContractType == typeof(SpecialTypeDataContract)))
                        {
                            dataContract = new JsonDataContract(traditionalDataContract);
                        } 
                        else if (traditionalDataContractType == typeof(CollectionDataContract))
                        { 
                            dataContract = new JsonCollectionDataContract((CollectionDataContract) traditionalDataContract); 
                        }
                        else if (traditionalDataContractType == typeof(XmlDataContract)) 
                        {
                            dataContract = new JsonXmlDataContract((XmlDataContract) traditionalDataContract);
                        }
                        else 
                        {
                            throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("traditionalDataContract", 
                                SR.GetString(SR.JsonTypeNotSupportedByDataContractJsonSerializer, traditionalDataContract.UnderlyingType)); 
                        }
                    } 
                    return dataContract;
                }
            }
 
            void AddCollectionItemContractsToKnownDataContracts()
            { 
                if (traditionalDataContract.KnownDataContracts != null) 
                {
                    foreach (KeyValuePair knownDataContract in traditionalDataContract.KnownDataContracts) 
                    {
                        if (!object.ReferenceEquals(knownDataContract, null))
                        {
                            CollectionDataContract collectionDataContract = knownDataContract.Value as CollectionDataContract; 
                            while (collectionDataContract != null)
                            { 
                                DataContract itemContract = collectionDataContract.ItemContract; 
                                if (knownDataContracts == null)
                                { 
                                    knownDataContracts = new Dictionary();
                                }

                                if (!knownDataContracts.ContainsKey(itemContract.StableName)) 
                                {
                                    knownDataContracts.Add(itemContract.StableName, itemContract); 
                                } 

                                if (collectionDataContract.ItemType.IsGenericType 
                                    && collectionDataContract.ItemType.GetGenericTypeDefinition() == typeof(KeyValue <, > ))
                                {
                                    DataContract itemDataContract = DataContract.GetDataContract(Globals.TypeOfKeyValuePair.MakeGenericType(collectionDataContract.ItemType.GetGenericArguments()));
                                    if (!knownDataContracts.ContainsKey(itemDataContract.StableName)) 
                                    {
                                        knownDataContracts.Add(itemDataContract.StableName, itemDataContract); 
                                    } 
                                }
 
                                if (!(itemContract is CollectionDataContract))
                                {
                                    break;
                                } 
                                collectionDataContract = itemContract as CollectionDataContract;
                            } 
                        } 
                    }
                } 
            }
        }

    } 
}

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

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