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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Reflection;
using System.Runtime;
using System.Runtime.Serialization;
using System.Runtime.Serialization.DataContracts;
using System.Xml;
using DataContractDictionary = System.Collections.Generic.Dictionary<System.Xml.XmlQualifiedName, System.Runtime.Serialization.DataContracts.DataContract>;
namespace System.Runtime.Serialization.Json
{
internal class JsonDataContract
{
private readonly JsonDataContractCriticalHelper _helper;
[RequiresDynamicCode(DataContract.SerializerAOTWarning)]
[RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]
protected JsonDataContract(DataContract traditionalDataContract)
{
_helper = new JsonDataContractCriticalHelper(traditionalDataContract);
}
protected JsonDataContract(JsonDataContractCriticalHelper helper)
{
_helper = helper;
}
internal virtual string? TypeName => null;
protected JsonDataContractCriticalHelper Helper => _helper;
protected DataContract TraditionalDataContract => _helper.TraditionalDataContract;
private DataContractDictionary? KnownDataContracts => _helper.KnownDataContracts;
public static JsonReadWriteDelegates? GetGeneratedReadWriteDelegates(DataContract c)
{
// this method used to be rewritten by an IL transform
// with the restructuring for multi-file, this is no longer true - instead
// this has become a normal method
JsonReadWriteDelegates? result;
return JsonReadWriteDelegates.GetJsonDelegates().TryGetValue(c, out result) ? result : null;
}
internal static JsonReadWriteDelegates GetReadWriteDelegatesFromGeneratedAssembly(DataContract c)
{
JsonReadWriteDelegates? result = GetGeneratedReadWriteDelegates(c);
if (result == null)
{
throw new InvalidDataContractException(SR.Format(SR.SerializationCodeIsMissingForType, c.UnderlyingType));
}
else
{
return result;
}
}
internal static JsonReadWriteDelegates? TryGetReadWriteDelegatesFromGeneratedAssembly(DataContract c)
{
JsonReadWriteDelegates? result = GetGeneratedReadWriteDelegates(c);
return result;
}
[RequiresDynamicCode(DataContract.SerializerAOTWarning)]
[RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]
public static JsonDataContract GetJsonDataContract(DataContract traditionalDataContract)
{
return JsonDataContractCriticalHelper.GetJsonDataContract(traditionalDataContract);
}
[RequiresDynamicCode(DataContract.SerializerAOTWarning)]
[RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]
public object? ReadJsonValue(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson? context)
{
PushKnownDataContracts(context);
object? deserializedObject = ReadJsonValueCore(jsonReader, context);
PopKnownDataContracts(context);
return deserializedObject;
}
[RequiresDynamicCode(DataContract.SerializerAOTWarning)]
[RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]
public virtual object? ReadJsonValueCore(XmlReaderDelegator jsonReader, XmlObjectSerializerReadContextComplexJson? context)
{
return TraditionalDataContract.ReadXmlValue(jsonReader, context);
}
[RequiresDynamicCode(DataContract.SerializerAOTWarning)]
[RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]
public void WriteJsonValue(XmlWriterDelegator jsonWriter, object obj, XmlObjectSerializerWriteContextComplexJson? context, RuntimeTypeHandle declaredTypeHandle)
{
PushKnownDataContracts(context);
WriteJsonValueCore(jsonWriter, obj, context, declaredTypeHandle);
PopKnownDataContracts(context);
}
[RequiresDynamicCode(DataContract.SerializerAOTWarning)]
[RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]
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)
{
if (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)
{
Debug.Assert(context != null);
context.scopedKnownTypes.Pop();
}
}
protected void PushKnownDataContracts(XmlObjectSerializerContext? context)
{
if (KnownDataContracts != null)
{
Debug.Assert(context != null);
context.scopedKnownTypes.Push(KnownDataContracts);
}
}
internal class JsonDataContractCriticalHelper
{
private static readonly object s_cacheLock = new object();
private static readonly object s_createDataContractLock = new object();
private static JsonDataContract[] s_dataContractCache = new JsonDataContract[32];
private static int s_dataContractID;
private static readonly ConcurrentDictionary<nint, int> s_typeToIDCache = new();
private DataContractDictionary? _knownDataContracts;
private readonly DataContract _traditionalDataContract;
private readonly string _typeName;
[RequiresDynamicCode(DataContract.SerializerAOTWarning)]
[RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]
internal JsonDataContractCriticalHelper(DataContract traditionalDataContract)
{
_traditionalDataContract = traditionalDataContract;
AddCollectionItemContractsToKnownDataContracts();
_typeName = string.IsNullOrEmpty(traditionalDataContract.Namespace.Value) ? traditionalDataContract.Name.Value : string.Concat(traditionalDataContract.Name.Value, JsonGlobals.NameValueSeparatorString, XmlObjectSerializerWriteContextComplexJson.TruncateDefaultDataContractNamespace(traditionalDataContract.Namespace.Value));
}
internal DataContractDictionary? KnownDataContracts => _knownDataContracts;
internal DataContract TraditionalDataContract => _traditionalDataContract;
internal virtual string TypeName => _typeName;
[RequiresDynamicCode(DataContract.SerializerAOTWarning)]
[RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]
public static JsonDataContract GetJsonDataContract(DataContract traditionalDataContract)
{
int id = JsonDataContractCriticalHelper.GetId(traditionalDataContract.UnderlyingType.TypeHandle);
JsonDataContract dataContract = s_dataContractCache[id];
if (dataContract == null)
{
dataContract = CreateJsonDataContract(id, traditionalDataContract);
s_dataContractCache[id] = dataContract;
}
return dataContract;
}
internal static int GetId(RuntimeTypeHandle typeHandle)
{
if (s_typeToIDCache.TryGetValue(typeHandle.Value, out int id))
return id;
lock (s_cacheLock)
{
return s_typeToIDCache.GetOrAdd(typeHandle.Value, static _ =>
{
int nextId = s_dataContractID++;
if (nextId >= s_dataContractCache.Length)
{
int newSize = (nextId < int.MaxValue / 2) ? nextId * 2 : int.MaxValue;
if (newSize <= nextId)
{
Debug.Fail("DataContract cache overflow");
throw new SerializationException(SR.DataContractCacheOverflow);
}
Array.Resize<JsonDataContract>(ref s_dataContractCache, newSize);
}
return nextId;
});
}
}
[RequiresDynamicCode(DataContract.SerializerAOTWarning)]
[RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]
private static JsonDataContract CreateJsonDataContract(int id, DataContract traditionalDataContract)
{
lock (s_createDataContractLock)
{
JsonDataContract dataContract = s_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 new ArgumentException(SR.Format(SR.JsonTypeNotSupportedByDataContractJsonSerializer, traditionalDataContract.UnderlyingType), nameof(traditionalDataContract));
}
}
return dataContract;
}
}
[RequiresDynamicCode(DataContract.SerializerAOTWarning)]
[RequiresUnreferencedCode(DataContract.SerializerTrimmerWarning)]
private void AddCollectionItemContractsToKnownDataContracts()
{
if (_traditionalDataContract.KnownDataContracts != null)
{
foreach (KeyValuePair<XmlQualifiedName, DataContract> knownDataContract in _traditionalDataContract.KnownDataContracts)
{
CollectionDataContract? collectionDataContract = knownDataContract.Value as CollectionDataContract;
while (collectionDataContract != null)
{
DataContract itemContract = collectionDataContract.ItemContract;
_knownDataContracts ??= new DataContractDictionary();
_knownDataContracts.TryAdd(itemContract.XmlName, itemContract);
if (collectionDataContract.ItemType.IsGenericType
&& collectionDataContract.ItemType.GetGenericTypeDefinition() == typeof(KeyValue<,>))
{
DataContract itemDataContract = DataContract.GetDataContract(Globals.TypeOfKeyValuePair.MakeGenericType(collectionDataContract.ItemType.GenericTypeArguments));
_knownDataContracts.TryAdd(itemDataContract.XmlName, itemDataContract);
}
if (!(itemContract is CollectionDataContract))
{
break;
}
collectionDataContract = itemContract as CollectionDataContract;
}
}
}
}
}
}
internal sealed class JsonReadWriteDelegates
{
// this is the global dictionary for JSON delegates introduced for multi-file
private static readonly Dictionary<DataContract, JsonReadWriteDelegates> s_jsonDelegates = new Dictionary<DataContract, JsonReadWriteDelegates>();
public static Dictionary<DataContract, JsonReadWriteDelegates> GetJsonDelegates()
{
return s_jsonDelegates;
}
public JsonFormatClassWriterDelegate? ClassWriterDelegate { get; set; }
public JsonFormatClassReaderDelegate? ClassReaderDelegate { get; set; }
public JsonFormatCollectionWriterDelegate? CollectionWriterDelegate { get; set; }
public JsonFormatCollectionReaderDelegate? CollectionReaderDelegate { get; set; }
public JsonFormatGetOnlyCollectionReaderDelegate? GetOnlyCollectionReaderDelegate { get; set; }
}
}
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