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//----------------------------------------------------------------
// 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<XmlQualifiedName, DataContract> 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
#if USE_REFEMIT
public class JsonDataContractCriticalHelper
#else
internal class JsonDataContractCriticalHelper
#endif
{
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<TypeHandleRef, IntRef> typeToIDCache = new Dictionary<TypeHandleRef, IntRef>(new TypeHandleRefEqualityComparer());
Dictionary<XmlQualifiedName, DataContract> 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<XmlQualifiedName, DataContract> 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<JsonDataContract>(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<XmlQualifiedName, DataContract> 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<XmlQualifiedName, DataContract>();
}
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;
}
}
}
}
}
}
}
}
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