Code:
/ WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / NetFx35 / System.ServiceModel.Web / System / Runtime / Serialization / Json / JsonDataContract.cs / 1 / JsonDataContract.cs
//---------------------------------------------------------------- // Copyright (c) Microsoft Corporation. All rights reserved. //--------------------------------------------------------------- namespace System.Runtime.Serialization.Json { using System.Runtime.Serialization; using System.Collections.Generic; using System.Reflection; using System.ServiceModel; using System.Xml; using System.Security; using System.ServiceModel.Web; #if USE_REFEMIT public class JsonDataContract #else class JsonDataContract #endif { //// 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; //// Critical - initializes SecurityCritical field 'helper' // Safe - doesn't leak anything // [SecurityCritical, SecurityTreatAsSafe] protected JsonDataContract(DataContract traditionalDataContract) { this.helper = new JsonDataContractCriticalHelper(traditionalDataContract); } //// Critical - initializes SecurityCritical field 'helper' // Safe - doesn't leak anything // [SecurityCritical, SecurityTreatAsSafe] protected JsonDataContract(JsonDataContractCriticalHelper helper) { this.helper = helper; } internal virtual string TypeName { get { return null; } } protected JsonDataContractCriticalHelper Helper { //// 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 { //// Critical - fetches the critical TraditionalDataContract from the helper // Safe - TraditionalDataContract needs to be protected for only write // [SecurityCritical, SecurityTreatAsSafe] get { return this.helper.TraditionalDataContract; } } DictionaryKnownDataContracts { // // Critical - fetches the critical KnownDataContracts from the helper // Safe - KnownDataContracts needs to be protected for only write // [SecurityCritical, SecurityTreatAsSafe] get { return this.helper.KnownDataContracts; } } //// Critical - fetches the critical JsonDataContract from the helper // Safe - Needs to be protected for only write // [SecurityCritical, SecurityTreatAsSafe] 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); } //// Review - checks type visibility to calculate if access to it requires MemberAccessPermission. // since this information is used to determine whether to give the generated code access // permissions to private members, any changes to the logic should be reviewed. // [SecurityRequiresReview] internal static bool IsTypeVisibleInJsonSerializationModule(Type type) { return type.Module.Equals(JsonGlobals.JsonSerializationModule); } 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); } } //// Critical - holds all state used for (de)serializing types. // since the data is cached statically, we lock down access to it. // [SecurityCritical(SecurityCriticalScope.Everything)] 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 DictionarytypeToIDCache = 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 System.ServiceModel.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 (System.ServiceModel.DiagnosticUtility.IsFatal(ex)) { throw; } throw System.ServiceModel.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 System.ServiceModel.DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("traditionalDataContract", SR2.GetString(SR2.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. 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