348 lines
16 KiB
C#
348 lines
16 KiB
C#
//----------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//----------------------------------------------------------------
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namespace System.Runtime.Serialization.Json
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{
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using System.Collections.Generic;
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using System.Runtime;
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using System.Runtime.Serialization;
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using System.Security;
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using System.Reflection;
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#if !MONO
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using System.ServiceModel;
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#endif
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using System.Xml;
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#if USE_REFEMIT
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public class JsonDataContract
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#else
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class JsonDataContract
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#endif
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{
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[Fx.Tag.SecurityNote(Critical = "Holds instance of CriticalHelper which keeps state that is cached statically for serialization."
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+ "Static fields are marked SecurityCritical or readonly to prevent data from being modified or leaked to other components in appdomain.")]
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[SecurityCritical]
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JsonDataContractCriticalHelper helper;
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[Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.",
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Safe = "Doesn't leak anything.")]
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[SecuritySafeCritical]
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protected JsonDataContract(DataContract traditionalDataContract)
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{
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this.helper = new JsonDataContractCriticalHelper(traditionalDataContract);
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}
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[Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.",
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Safe = "Doesn't leak anything.")]
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[SecuritySafeCritical]
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protected JsonDataContract(JsonDataContractCriticalHelper helper)
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{
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this.helper = helper;
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}
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internal virtual string TypeName
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{
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get { return null; }
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}
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protected JsonDataContractCriticalHelper Helper
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{
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[Fx.Tag.SecurityNote(Critical = "Holds instance of CriticalHelper which keeps state that is cached statically for serialization."
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+ "Static fields are marked SecurityCritical or readonly to prevent data from being modified or leaked to other components in appdomain.")]
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[SecurityCritical]
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get { return helper; }
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}
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protected DataContract TraditionalDataContract
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{
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[Fx.Tag.SecurityNote(Critical = "Fetches the critical TraditionalDataContract from the helper.",
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Safe = "TraditionalDataContract only needs to be protected for write.")]
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[SecuritySafeCritical]
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get { return this.helper.TraditionalDataContract; }
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}
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Dictionary<XmlQualifiedName, DataContract> KnownDataContracts
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{
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[Fx.Tag.SecurityNote(Critical = "Fetches the critical KnownDataContracts from the helper.",
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Safe = "KnownDataContracts only needs to be protected for write.")]
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[SecuritySafeCritical]
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get { return this.helper.KnownDataContracts; }
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}
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[Fx.Tag.SecurityNote(Critical = "Fetches the critical JsonDataContract from the helper.",
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Safe = "JsonDataContract only needs to be protected for write.")]
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[SecuritySafeCritical]
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public static JsonDataContract GetJsonDataContract(DataContract traditionalDataContract)
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{
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return JsonDataContractCriticalHelper.GetJsonDataContract(traditionalDataContract);
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}
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public object ReadJsonValue(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context)
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{
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PushKnownDataContracts(context);
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object deserializedObject = ReadJsonValueCore(jsonReader, context);
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PopKnownDataContracts(context);
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return deserializedObject;
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}
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public virtual object ReadJsonValueCore(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson context)
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{
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return TraditionalDataContract.ReadXmlValue(jsonReader, context);
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}
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public void WriteJsonValue(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
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{
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PushKnownDataContracts(context);
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WriteJsonValueCore(jsonWriter, obj, context, declaredTypeHandle);
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PopKnownDataContracts(context);
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}
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public virtual void WriteJsonValueCore(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson context, RuntimeTypeHandle declaredTypeHandle)
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{
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TraditionalDataContract.WriteXmlValue(jsonWriter, obj, context);
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}
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protected static object HandleReadValue(object obj, XmlObjectSerializerReadContext context)
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{
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context.AddNewObject(obj);
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return obj;
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}
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protected static bool TryReadNullAtTopLevel(XmlReaderDelegator reader)
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{
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while (reader.MoveToAttribute(JsonGlobals.typeString) && (reader.Value == JsonGlobals.nullString))
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{
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reader.Skip();
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reader.MoveToElement();
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return true;
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}
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reader.MoveToElement();
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return false;
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}
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protected void PopKnownDataContracts(XmlObjectSerializerContext context)
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{
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if (KnownDataContracts != null)
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{
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context.scopedKnownTypes.Pop();
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}
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}
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protected void PushKnownDataContracts(XmlObjectSerializerContext context)
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{
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if (KnownDataContracts != null)
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{
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context.scopedKnownTypes.Push(KnownDataContracts);
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}
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}
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[Fx.Tag.SecurityNote(Critical = "Holds all state used for (de)serializing types."
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+ "Since the data is cached statically, we lock down access to it.")]
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#if !NO_SECURITY_ATTRIBUTES
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#pragma warning disable 618 // have not moved to the v4 security model yet
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[SecurityCritical(SecurityCriticalScope.Everything)]
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#pragma warning restore 618
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#endif
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#if USE_REFEMIT
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public class JsonDataContractCriticalHelper
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#else
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internal class JsonDataContractCriticalHelper
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#endif
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{
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static object cacheLock = new object();
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static object createDataContractLock = new object();
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static JsonDataContract[] dataContractCache = new JsonDataContract[32];
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static int dataContractID = 0;
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static TypeHandleRef typeHandleRef = new TypeHandleRef();
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static Dictionary<TypeHandleRef, IntRef> typeToIDCache = new Dictionary<TypeHandleRef, IntRef>(new TypeHandleRefEqualityComparer());
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Dictionary<XmlQualifiedName, DataContract> knownDataContracts;
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DataContract traditionalDataContract;
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string typeName;
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internal JsonDataContractCriticalHelper(DataContract traditionalDataContract)
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{
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this.traditionalDataContract = traditionalDataContract;
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AddCollectionItemContractsToKnownDataContracts();
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this.typeName = string.IsNullOrEmpty(traditionalDataContract.Namespace.Value) ? traditionalDataContract.Name.Value : string.Concat(traditionalDataContract.Name.Value, JsonGlobals.NameValueSeparatorString, XmlObjectSerializerWriteContextComplexJson.TruncateDefaultDataContractNamespace(traditionalDataContract.Namespace.Value));
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}
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internal Dictionary<XmlQualifiedName, DataContract> KnownDataContracts
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{
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get { return this.knownDataContracts; }
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}
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internal DataContract TraditionalDataContract
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{
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get { return this.traditionalDataContract; }
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}
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internal virtual string TypeName
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{
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get { return this.typeName; }
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}
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public static JsonDataContract GetJsonDataContract(DataContract traditionalDataContract)
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{
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int id = JsonDataContractCriticalHelper.GetId(traditionalDataContract.UnderlyingType.TypeHandle);
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JsonDataContract dataContract = dataContractCache[id];
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if (dataContract == null)
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{
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dataContract = CreateJsonDataContract(id, traditionalDataContract);
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dataContractCache[id] = dataContract;
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}
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return dataContract;
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}
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internal static int GetId(RuntimeTypeHandle typeHandle)
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{
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lock (cacheLock)
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{
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IntRef id;
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typeHandleRef.Value = typeHandle;
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if (!typeToIDCache.TryGetValue(typeHandleRef, out id))
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{
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int value = dataContractID++;
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if (value >= dataContractCache.Length)
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{
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int newSize = (value < Int32.MaxValue / 2) ? value * 2 : Int32.MaxValue;
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if (newSize <= value)
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{
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Fx.Assert("DataContract cache overflow");
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new SerializationException(System.Runtime.Serialization.SR.GetString(System.Runtime.Serialization.SR.DataContractCacheOverflow)));
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}
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Array.Resize<JsonDataContract>(ref dataContractCache, newSize);
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}
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id = new IntRef(value);
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try
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{
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typeToIDCache.Add(new TypeHandleRef(typeHandle), id);
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}
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catch (Exception ex)
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{
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if (Fx.IsFatal(ex))
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{
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throw;
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}
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperFatal(ex.Message, ex);
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}
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}
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return id.Value;
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}
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}
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static JsonDataContract CreateJsonDataContract(int id, DataContract traditionalDataContract)
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{
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lock (createDataContractLock)
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{
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JsonDataContract dataContract = dataContractCache[id];
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if (dataContract == null)
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{
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Type traditionalDataContractType = traditionalDataContract.GetType();
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if (traditionalDataContractType == typeof(ObjectDataContract))
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{
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dataContract = new JsonObjectDataContract(traditionalDataContract);
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}
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else if (traditionalDataContractType == typeof(StringDataContract))
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{
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dataContract = new JsonStringDataContract((StringDataContract)traditionalDataContract);
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}
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else if (traditionalDataContractType == typeof(UriDataContract))
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{
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dataContract = new JsonUriDataContract((UriDataContract)traditionalDataContract);
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}
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else if (traditionalDataContractType == typeof(QNameDataContract))
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{
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dataContract = new JsonQNameDataContract((QNameDataContract)traditionalDataContract);
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}
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else if (traditionalDataContractType == typeof(ByteArrayDataContract))
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{
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dataContract = new JsonByteArrayDataContract((ByteArrayDataContract)traditionalDataContract);
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}
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else if (traditionalDataContract.IsPrimitive ||
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traditionalDataContract.UnderlyingType == Globals.TypeOfXmlQualifiedName)
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{
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dataContract = new JsonDataContract(traditionalDataContract);
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}
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else if (traditionalDataContractType == typeof(ClassDataContract))
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{
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dataContract = new JsonClassDataContract((ClassDataContract)traditionalDataContract);
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}
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else if (traditionalDataContractType == typeof(EnumDataContract))
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{
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dataContract = new JsonEnumDataContract((EnumDataContract)traditionalDataContract);
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}
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else if ((traditionalDataContractType == typeof(GenericParameterDataContract)) ||
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(traditionalDataContractType == typeof(SpecialTypeDataContract)))
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{
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dataContract = new JsonDataContract(traditionalDataContract);
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}
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else if (traditionalDataContractType == typeof(CollectionDataContract))
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{
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dataContract = new JsonCollectionDataContract((CollectionDataContract)traditionalDataContract);
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}
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else if (traditionalDataContractType == typeof(XmlDataContract))
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{
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dataContract = new JsonXmlDataContract((XmlDataContract)traditionalDataContract);
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}
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else
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("traditionalDataContract",
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SR.GetString(SR.JsonTypeNotSupportedByDataContractJsonSerializer, traditionalDataContract.UnderlyingType));
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}
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}
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return dataContract;
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}
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}
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void AddCollectionItemContractsToKnownDataContracts()
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{
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if (traditionalDataContract.KnownDataContracts != null)
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{
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foreach (KeyValuePair<XmlQualifiedName, DataContract> knownDataContract in traditionalDataContract.KnownDataContracts)
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{
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if (!object.ReferenceEquals(knownDataContract, null))
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{
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CollectionDataContract collectionDataContract = knownDataContract.Value as CollectionDataContract;
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while (collectionDataContract != null)
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{
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DataContract itemContract = collectionDataContract.ItemContract;
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if (knownDataContracts == null)
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{
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knownDataContracts = new Dictionary<XmlQualifiedName, DataContract>();
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}
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if (!knownDataContracts.ContainsKey(itemContract.StableName))
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{
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knownDataContracts.Add(itemContract.StableName, itemContract);
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}
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if (collectionDataContract.ItemType.IsGenericType
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&& collectionDataContract.ItemType.GetGenericTypeDefinition() == typeof(KeyValue<,>))
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{
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DataContract itemDataContract = DataContract.GetDataContract(Globals.TypeOfKeyValuePair.MakeGenericType(collectionDataContract.ItemType.GetGenericArguments()));
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if (!knownDataContracts.ContainsKey(itemDataContract.StableName))
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{
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knownDataContracts.Add(itemDataContract.StableName, itemDataContract);
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}
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}
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if (!(itemContract is CollectionDataContract))
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{
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break;
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}
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collectionDataContract = itemContract as CollectionDataContract;
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}
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}
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}
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}
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}
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}
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}
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}
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