private static JsonPropertyInfo?GetPropertyWithUniqueAttribute(Type classType, Type attributeType, Dictionary <string, JsonPropertyInfo> cache)
{
JsonPropertyInfo?property = null;
foreach (JsonPropertyInfo jsonPropertyInfo in cache.Values)
{
Debug.Assert(jsonPropertyInfo.PropertyInfo != null);
Attribute?attribute = jsonPropertyInfo.PropertyInfo.GetCustomAttribute(attributeType);
if (attribute != null)
{
if (property != null)
{
ThrowHelper.ThrowInvalidOperationException_SerializationDuplicateTypeAttribute(classType, attributeType);
}
property = jsonPropertyInfo;
}
}
return(property);
}
private void DeterminePropertyName()
{
if (PropertyInfo == null)
{
return;
}
JsonPropertyNameAttribute?nameAttribute = GetAttribute <JsonPropertyNameAttribute>(PropertyInfo);
if (nameAttribute != null)
{
string name = nameAttribute.Name;
if (name == null)
{
ThrowHelper.ThrowInvalidOperationException_SerializerPropertyNameNull(ParentClassType, this);
}
NameAsString = name;
}
else if (Options.PropertyNamingPolicy != null)
{
string name = Options.PropertyNamingPolicy.ConvertName(PropertyInfo.Name);
if (name == null)
{
ThrowHelper.ThrowInvalidOperationException_SerializerPropertyNameNull(ParentClassType, this);
}
NameAsString = name;
}
else
{
NameAsString = PropertyInfo.Name;
}
Debug.Assert(NameAsString != null);
NameAsUtf8Bytes = Encoding.UTF8.GetBytes(NameAsString);
EscapedNameSection = JsonHelpers.GetEscapedPropertyNameSection(NameAsUtf8Bytes, Options.Encoder);
}
public void Write(ref WriteStack state, Utf8JsonWriter writer)
{
Debug.Assert(ShouldSerialize);
if (state.Current.CollectionEnumerator != null)
{
// Forward the setter to the value-based JsonPropertyInfo.
JsonPropertyInfo propertyInfo = ElementClassInfo.PolicyProperty;
propertyInfo.WriteEnumerable(ref state, writer);
}
else
{
int originalDepth = writer.CurrentDepth;
OnWrite(ref state.Current, writer);
if (originalDepth != writer.CurrentDepth)
{
ThrowHelper.ThrowJsonException_SerializationConverterWrite(state.PropertyPath, ConverterBase.ToString());
}
}
}
private JsonPropertyInfo GetPropertyThatHasAttribute(Type attributeType)
{
Debug.Assert(PropertyCache != null);
JsonPropertyInfo property = null;
foreach (JsonPropertyInfo jsonPropertyInfo in PropertyCache.Values)
{
Attribute attribute = jsonPropertyInfo.PropertyInfo.GetCustomAttribute(attributeType);
if (attribute != null)
{
if (property != null)
{
ThrowHelper.ThrowInvalidOperationException_SerializationDuplicateTypeAttribute(Type, attributeType);
}
property = jsonPropertyInfo;
}
}
return(property);
}
public static object CreateDictionaryValue(ref ReadStack state)
{
JsonPropertyInfo jsonPropertyInfo = state.Current.JsonPropertyInfo;
// If the property has a DictionaryConverter, then we use tempDictionaryValues.
if (jsonPropertyInfo.DictionaryConverter != null)
{
IDictionary converterDictionary;
JsonClassInfo elementClassInfo = jsonPropertyInfo.ElementClassInfo;
if (elementClassInfo.ClassType == ClassType.Value)
{
converterDictionary = elementClassInfo.PolicyProperty.CreateConverterDictionary();
}
else
{
converterDictionary = new Dictionary <string, object>();
}
state.Current.TempDictionaryValues = converterDictionary;
// Clear the value if present to ensure we don't confuse TempDictionaryValues with the collection.
if (!jsonPropertyInfo.IsPropertyPolicy && jsonPropertyInfo.CanBeNull)
{
jsonPropertyInfo.SetValueAsObject(state.Current.ReturnValue, null);
}
return(null);
}
JsonClassInfo runtimeClassInfo = jsonPropertyInfo.RuntimeClassInfo;
if (runtimeClassInfo.CreateObject == null)
{
ThrowHelper.ThrowNotSupportedException_DeserializeCreateObjectDelegateIsNull(jsonPropertyInfo.DeclaredPropertyType);
}
return(runtimeClassInfo.CreateObject());
}
public static object CreateEnumerableValue(ref Utf8JsonReader reader, ref ReadStack state, JsonSerializerOptions options)
{
JsonPropertyInfo jsonPropertyInfo = state.Current.JsonPropertyInfo;
// If the property has an EnumerableConverter, then we use tempEnumerableValues.
if (jsonPropertyInfo.EnumerableConverter != null)
{
IList converterList;
if (jsonPropertyInfo.ElementClassInfo.ClassType == ClassType.Value)
{
converterList = jsonPropertyInfo.ElementClassInfo.GetPolicyProperty().CreateConverterList();
}
else
{
converterList = new List <object>();
}
state.Current.TempEnumerableValues = converterList;
return(null);
}
Type propType = state.Current.JsonPropertyInfo.RuntimePropertyType;
if (typeof(IList).IsAssignableFrom(propType))
{
// If IList, add the members as we create them.
JsonClassInfo collectionClassInfo = state.Current.JsonPropertyInfo.RuntimeClassInfo;
IList collection = (IList)collectionClassInfo.CreateObject();
return(collection);
}
else
{
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(propType, reader, state.JsonPath);
return(null);
}
}
protected override void OnReadEnumerable(ref ReadStack state, ref Utf8JsonReader reader)
{
if (Converter == null)
{
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(RuntimePropertyType);
}
if (state.Current.KeyName == null && state.Current.IsProcessingDictionaryOrIDictionaryConstructible())
{
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(RuntimePropertyType);
return;
}
// We need an initialized array in order to store the values.
if (state.Current.IsProcessingEnumerable() && state.Current.TempEnumerableValues == null && state.Current.ReturnValue == null)
{
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(RuntimePropertyType);
return;
}
TConverter value = Converter.Read(ref reader, RuntimePropertyType, Options);
JsonSerializer.ApplyValueToEnumerable(ref value, ref state);
}
public void DetermineEnumerablePopulationStrategy(object targetEnumerable)
{
Debug.Assert(JsonPropertyInfo.ClassType == ClassType.Enumerable);
if (JsonPropertyInfo.RuntimeClassInfo.AddItemToObject != null)
{
if (!JsonPropertyInfo.TryCreateEnumerableAddMethod(targetEnumerable, out object addMethodDelegate))
{
// No "add" method for this collection, hence, not supported for deserialization.
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(
JsonPropertyInfo.DeclaredPropertyType,
JsonPropertyInfo.ParentClassType,
JsonPropertyInfo.PropertyInfo);
}
AddObjectToEnumerable = addMethodDelegate;
}
else if (targetEnumerable is IList targetList)
{
if (targetList.IsReadOnly)
{
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(
JsonPropertyInfo.DeclaredPropertyType,
JsonPropertyInfo.ParentClassType,
JsonPropertyInfo.PropertyInfo);
}
}
// If there's no add method, and we can't cast to IList, this collection is not supported for deserialization.
else
{
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(
JsonPropertyInfo.DeclaredPropertyType,
JsonPropertyInfo.ParentClassType,
JsonPropertyInfo.PropertyInfo);
}
}
public bool DetermineExtensionDataProperty(Dictionary <string, JsonPropertyInfo> cache)
{
JsonPropertyInfo?jsonPropertyInfo = GetPropertyWithUniqueAttribute(Type, typeof(JsonExtensionDataAttribute), cache);
if (jsonPropertyInfo != null)
{
Type declaredPropertyType = jsonPropertyInfo.DeclaredPropertyType;
if (typeof(IDictionary <string, object>).IsAssignableFrom(declaredPropertyType) ||
typeof(IDictionary <string, JsonElement>).IsAssignableFrom(declaredPropertyType))
{
JsonConverter converter = Options.GetConverter(declaredPropertyType);
Debug.Assert(converter != null);
}
else
{
ThrowHelper.ThrowInvalidOperationException_SerializationDataExtensionPropertyInvalid(Type, jsonPropertyInfo);
}
DataExtensionProperty = jsonPropertyInfo;
return(true);
}
return(false);
}
private static TValue?Read <TValue>(ref Utf8JsonReader reader, JsonTypeInfo jsonTypeInfo)
{
ReadStack state = default;
state.Initialize(jsonTypeInfo);
JsonReaderState readerState = reader.CurrentState;
if (readerState.Options.CommentHandling == JsonCommentHandling.Allow)
{
throw new ArgumentException(SR.JsonSerializerDoesNotSupportComments, nameof(reader));
}
// Value copy to overwrite the ref on an exception and undo the destructive reads.
Utf8JsonReader restore = reader;
ReadOnlySpan <byte> valueSpan = default;
ReadOnlySequence <byte> valueSequence = default;
try
{
switch (reader.TokenType)
{
// A new reader was created and has never been read,
// so we need to move to the first token.
// (or a reader has terminated and we're about to throw)
case JsonTokenType.None:
// Using a reader loop the caller has identified a property they wish to
// hydrate into a JsonDocument. Move to the value first.
case JsonTokenType.PropertyName:
{
if (!reader.Read())
{
ThrowHelper.ThrowJsonReaderException(ref reader, ExceptionResource.ExpectedOneCompleteToken);
}
break;
}
}
switch (reader.TokenType)
{
// Any of the "value start" states are acceptable.
case JsonTokenType.StartObject:
case JsonTokenType.StartArray:
{
long startingOffset = reader.TokenStartIndex;
if (!reader.TrySkip())
{
ThrowHelper.ThrowJsonReaderException(ref reader, ExceptionResource.NotEnoughData);
}
long totalLength = reader.BytesConsumed - startingOffset;
ReadOnlySequence <byte> sequence = reader.OriginalSequence;
if (sequence.IsEmpty)
{
valueSpan = reader.OriginalSpan.Slice(
checked ((int)startingOffset),
checked ((int)totalLength));
}
else
{
valueSequence = sequence.Slice(startingOffset, totalLength);
}
Debug.Assert(
reader.TokenType == JsonTokenType.EndObject ||
reader.TokenType == JsonTokenType.EndArray);
break;
}
// Single-token values
case JsonTokenType.Number:
case JsonTokenType.True:
case JsonTokenType.False:
case JsonTokenType.Null:
{
if (reader.HasValueSequence)
{
valueSequence = reader.ValueSequence;
}
else
{
valueSpan = reader.ValueSpan;
}
break;
}
// String's ValueSequence/ValueSpan omits the quotes, we need them back.
case JsonTokenType.String:
{
ReadOnlySequence <byte> sequence = reader.OriginalSequence;
if (sequence.IsEmpty)
{
// Since the quoted string fit in a ReadOnlySpan originally
// the contents length plus the two quotes can't overflow.
int payloadLength = reader.ValueSpan.Length + 2;
Debug.Assert(payloadLength > 1);
ReadOnlySpan <byte> readerSpan = reader.OriginalSpan;
Debug.Assert(
readerSpan[(int)reader.TokenStartIndex] == (byte)'"',
$"Calculated span starts with {readerSpan[(int)reader.TokenStartIndex]}");
Debug.Assert(
readerSpan[(int)reader.TokenStartIndex + payloadLength - 1] == (byte)'"',
$"Calculated span ends with {readerSpan[(int)reader.TokenStartIndex + payloadLength - 1]}");
valueSpan = readerSpan.Slice((int)reader.TokenStartIndex, payloadLength);
}
else
{
long payloadLength = 2;
if (reader.HasValueSequence)
{
payloadLength += reader.ValueSequence.Length;
}
else
{
payloadLength += reader.ValueSpan.Length;
}
valueSequence = sequence.Slice(reader.TokenStartIndex, payloadLength);
Debug.Assert(
valueSequence.First.Span[0] == (byte)'"',
$"Calculated sequence starts with {valueSequence.First.Span[0]}");
Debug.Assert(
valueSequence.ToArray()[payloadLength - 1] == (byte)'"',
$"Calculated sequence ends with {valueSequence.ToArray()[payloadLength - 1]}");
}
break;
}
default:
{
byte displayByte;
if (reader.HasValueSequence)
{
displayByte = reader.ValueSequence.First.Span[0];
}
else
{
displayByte = reader.ValueSpan[0];
}
ThrowHelper.ThrowJsonReaderException(
ref reader,
ExceptionResource.ExpectedStartOfValueNotFound,
displayByte);
break;
}
}
}
catch (JsonReaderException ex)
{
reader = restore;
// Re-throw with Path information.
ThrowHelper.ReThrowWithPath(ref state, ex);
}
int length = valueSpan.IsEmpty ? checked ((int)valueSequence.Length) : valueSpan.Length;
byte[] rented = ArrayPool <byte> .Shared.Rent(length);
Span <byte> rentedSpan = rented.AsSpan(0, length);
try
{
if (valueSpan.IsEmpty)
{
valueSequence.CopyTo(rentedSpan);
}
else
{
valueSpan.CopyTo(rentedSpan);
}
JsonReaderOptions originalReaderOptions = readerState.Options;
var newReader = new Utf8JsonReader(rentedSpan, originalReaderOptions);
JsonConverter jsonConverter = state.Current.JsonPropertyInfo !.ConverterBase;
TValue? value = ReadCore <TValue>(jsonConverter, ref newReader, jsonTypeInfo.Options, ref state);
// The reader should have thrown if we have remaining bytes.
Debug.Assert(newReader.BytesConsumed == length);
return(value);
}
catch (JsonException)
{
reader = restore;
throw;
}
finally
{
rentedSpan.Clear();
ArrayPool <byte> .Shared.Return(rented);
}
}
public JsonClassInfo(Type type, JsonSerializerOptions options)
{
Type = type;
Options = options;
ClassType = GetClassType(type, options);
CreateObject = options.MemberAccessorStrategy.CreateConstructor(type);
// Ignore properties on enumerable.
switch (ClassType)
{
case ClassType.Object:
{
PropertyInfo[] properties = type.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
Dictionary <string, JsonPropertyInfo> cache = CreatePropertyCache(properties.Length);
foreach (PropertyInfo propertyInfo in properties)
{
// Ignore indexers
if (propertyInfo.GetIndexParameters().Length > 0)
{
continue;
}
// For now we only support public getters\setters
if (propertyInfo.GetMethod?.IsPublic == true ||
propertyInfo.SetMethod?.IsPublic == true)
{
JsonPropertyInfo jsonPropertyInfo = AddProperty(propertyInfo.PropertyType, propertyInfo, type, options);
Debug.Assert(jsonPropertyInfo != null);
// If the JsonPropertyNameAttribute or naming policy results in collisions, throw an exception.
if (!JsonHelpers.TryAdd(cache, jsonPropertyInfo.NameAsString, jsonPropertyInfo))
{
JsonPropertyInfo other = cache[jsonPropertyInfo.NameAsString];
if (other.ShouldDeserialize == false && other.ShouldSerialize == false)
{
// Overwrite the one just added since it has [JsonIgnore].
cache[jsonPropertyInfo.NameAsString] = jsonPropertyInfo;
}
else if (jsonPropertyInfo.ShouldDeserialize == true || jsonPropertyInfo.ShouldSerialize == true)
{
ThrowHelper.ThrowInvalidOperationException_SerializerPropertyNameConflict(this, jsonPropertyInfo);
}
// else ignore jsonPropertyInfo since it has [JsonIgnore].
}
}
}
if (DetermineExtensionDataProperty(cache))
{
// Remove from cache since it is handled independently.
cache.Remove(DataExtensionProperty.NameAsString);
}
// Set as a unit to avoid concurrency issues.
PropertyCache = cache;
}
break;
case ClassType.Enumerable:
case ClassType.Dictionary:
{
// Add a single property that maps to the class type so we can have policies applied.
AddPolicyProperty(type, options);
Type objectType;
if (IsNativelySupportedCollection(type))
{
// Use the type from the property policy to get any late-bound concrete types (from an interface like IDictionary).
objectType = PolicyProperty.RuntimePropertyType;
}
else
{
// We need to create the declared instance for types implementing natively supported collections.
objectType = PolicyProperty.DeclaredPropertyType;
}
CreateObject = options.MemberAccessorStrategy.CreateConstructor(objectType);
ElementType = GetElementType(type, parentType: null, memberInfo: null, options: options);
}
break;
case ClassType.IDictionaryConstructible:
{
// Add a single property that maps to the class type so we can have policies applied.
AddPolicyProperty(type, options);
ElementType = GetElementType(type, parentType: null, memberInfo: null, options: options);
CreateConcreteDictionary = options.MemberAccessorStrategy.CreateConstructor(
typeof(Dictionary <,>).MakeGenericType(typeof(string), ElementType));
CreateObject = options.MemberAccessorStrategy.CreateConstructor(PolicyProperty.DeclaredPropertyType);
}
break;
case ClassType.Value:
// Add a single property that maps to the class type so we can have policies applied.
AddPolicyProperty(type, options);
break;
case ClassType.Unknown:
// Add a single property that maps to the class type so we can have policies applied.
AddPolicyProperty(type, options);
PropertyCache = new Dictionary <string, JsonPropertyInfo>();
break;
default:
Debug.Fail($"Unexpected class type: {ClassType}");
break;
}
}
private static void ReadCore(
JsonSerializerOptions options,
ref Utf8JsonReader reader,
ref ReadStack readStack)
{
try
{
JsonReaderState initialState = default;
long initialBytesConsumed = default;
while (true)
{
if (readStack.ReadAhead)
{
// When we're reading ahead we always have to save the state
// as we don't know if the next token is an opening object or
// array brace.
initialState = reader.CurrentState;
initialBytesConsumed = reader.BytesConsumed;
}
if (!reader.Read())
{
// Need more data
break;
}
JsonTokenType tokenType = reader.TokenType;
if (JsonHelpers.IsInRangeInclusive(tokenType, JsonTokenType.String, JsonTokenType.False))
{
Debug.Assert(tokenType == JsonTokenType.String || tokenType == JsonTokenType.Number || tokenType == JsonTokenType.True || tokenType == JsonTokenType.False);
HandleValue(tokenType, options, ref reader, ref readStack);
}
else if (tokenType == JsonTokenType.PropertyName)
{
HandlePropertyName(options, ref reader, ref readStack);
}
else if (tokenType == JsonTokenType.StartObject)
{
if (readStack.Current.SkipProperty)
{
readStack.Push();
readStack.Current.Drain = true;
}
else if (readStack.Current.IsProcessingValue())
{
if (!HandleObjectAsValue(tokenType, options, ref reader, ref readStack, ref initialState, initialBytesConsumed))
{
// Need more data
break;
}
}
else if (readStack.Current.IsProcessingDictionary())
{
HandleStartDictionary(options, ref readStack);
}
else
{
HandleStartObject(options, ref readStack);
}
}
else if (tokenType == JsonTokenType.EndObject)
{
if (readStack.Current.Drain)
{
readStack.Pop();
// Clear the current property in case it is a dictionary, since dictionaries must have EndProperty() called when completed.
// A non-dictionary property can also have EndProperty() called when completed, although it is redundant.
readStack.Current.EndProperty();
}
else if (readStack.Current.IsProcessingDictionary())
{
HandleEndDictionary(options, ref readStack);
}
else
{
HandleEndObject(ref readStack);
}
}
else if (tokenType == JsonTokenType.StartArray)
{
if (!readStack.Current.IsProcessingValue())
{
HandleStartArray(options, ref readStack);
}
else if (!HandleObjectAsValue(tokenType, options, ref reader, ref readStack, ref initialState, initialBytesConsumed))
{
// Need more data
break;
}
}
else if (tokenType == JsonTokenType.EndArray)
{
HandleEndArray(options, ref readStack);
}
else if (tokenType == JsonTokenType.Null)
{
HandleNull(options, ref reader, ref readStack);
}
}
}
catch (JsonReaderException ex)
{
// Re-throw with Path information.
ThrowHelper.ReThrowWithPath(readStack, ex);
}
catch (FormatException ex) when(ex.Source == ThrowHelper.ExceptionSourceValueToRethrowAsJsonException)
{
ThrowHelper.ReThrowWithPath(readStack, reader, ex);
}
catch (InvalidOperationException ex) when(ex.Source == ThrowHelper.ExceptionSourceValueToRethrowAsJsonException)
{
ThrowHelper.ReThrowWithPath(readStack, reader, ex);
}
catch (JsonException ex)
{
ThrowHelper.AddExceptionInformation(readStack, reader, ex);
throw;
}
readStack.BytesConsumed += reader.BytesConsumed;
}
public JsonClassInfo(Type type, JsonSerializerOptions options)
{
Type = type;
Options = options;
JsonConverter converter = GetConverter(
Type,
parentClassType: null, // A ClassInfo never has a "parent" class.
propertyInfo: null, // A ClassInfo never has a "parent" property.
out Type runtimeType,
Options);
ClassType = converter.ClassType;
PropertyInfoForClassInfo = CreatePropertyInfoForClassInfo(Type, runtimeType, converter, Options);
switch (ClassType)
{
case ClassType.Object:
{
// Create the policy property.
PropertyInfoForClassInfo = CreatePropertyInfoForClassInfo(type, runtimeType, converter !, options);
CreateObject = options.MemberAccessorStrategy.CreateConstructor(type);
PropertyInfo[] properties = type.GetProperties(BindingFlags.Instance | BindingFlags.Public);
Dictionary <string, JsonPropertyInfo> cache = CreatePropertyCache(properties.Length);
foreach (PropertyInfo propertyInfo in properties)
{
// Ignore indexers
if (propertyInfo.GetIndexParameters().Length > 0)
{
continue;
}
// For now we only support public getters\setters
if (propertyInfo.GetMethod?.IsPublic == true ||
propertyInfo.SetMethod?.IsPublic == true)
{
JsonPropertyInfo jsonPropertyInfo = AddProperty(propertyInfo.PropertyType, propertyInfo, type, options);
Debug.Assert(jsonPropertyInfo != null && jsonPropertyInfo.NameAsString != null);
// If the JsonPropertyNameAttribute or naming policy results in collisions, throw an exception.
if (!JsonHelpers.TryAdd(cache, jsonPropertyInfo.NameAsString, jsonPropertyInfo))
{
JsonPropertyInfo other = cache[jsonPropertyInfo.NameAsString];
if (other.ShouldDeserialize == false && other.ShouldSerialize == false)
{
// Overwrite the one just added since it has [JsonIgnore].
cache[jsonPropertyInfo.NameAsString] = jsonPropertyInfo;
}
else if (jsonPropertyInfo.ShouldDeserialize == true || jsonPropertyInfo.ShouldSerialize == true)
{
ThrowHelper.ThrowInvalidOperationException_SerializerPropertyNameConflict(Type, jsonPropertyInfo);
}
// else ignore jsonPropertyInfo since it has [JsonIgnore].
}
}
}
JsonPropertyInfo[] cacheArray;
if (DetermineExtensionDataProperty(cache))
{
// Remove from cache since it is handled independently.
cache.Remove(DataExtensionProperty !.NameAsString !);
cacheArray = new JsonPropertyInfo[cache.Count + 1];
// Set the last element to the extension property.
cacheArray[cache.Count] = DataExtensionProperty;
}
else
{
cacheArray = new JsonPropertyInfo[cache.Count];
}
// Set fields when finished to avoid concurrency issues.
PropertyCache = cache;
cache.Values.CopyTo(cacheArray, 0);
PropertyCacheArray = cacheArray;
if (converter.ConstructorIsParameterized)
{
converter.CreateConstructorDelegate(options);
InitializeConstructorParameters(converter.ConstructorInfo);
}
}
break;
case ClassType.Enumerable:
case ClassType.Dictionary:
{
ElementType = converter.ElementType;
CreateObject = options.MemberAccessorStrategy.CreateConstructor(runtimeType);
}
break;
case ClassType.Value:
case ClassType.NewValue:
{
CreateObject = options.MemberAccessorStrategy.CreateConstructor(type);
}
break;
case ClassType.None:
{
ThrowHelper.ThrowNotSupportedException_SerializationNotSupported(type);
}
break;
default:
Debug.Fail($"Unexpected class type: {ClassType}");
throw new InvalidOperationException();
}
}
// There are three conditions to consider for an object (primitive value, enumerable or object) being processed here:
// 1) The object type was specified as the root-level return type to a Parse\Read method.
// 2) The object is property on a parent object.
// 3) The object is an element in an enumerable.
private static bool Write(
Utf8JsonWriter writer,
int originalWriterDepth,
int flushThreshold,
JsonSerializerOptions options,
ref WriteStack state)
{
bool finishedSerializing;
try
{
do
{
WriteStackFrame current = state.Current;
switch (current.JsonClassInfo.ClassType)
{
case ClassType.Enumerable:
finishedSerializing = HandleEnumerable(current.JsonClassInfo.ElementClassInfo, options, writer, ref state);
break;
case ClassType.Value:
Debug.Assert(current.JsonPropertyInfo.ClassType == ClassType.Value);
current.JsonPropertyInfo.Write(ref state, writer);
finishedSerializing = true;
break;
case ClassType.Object:
finishedSerializing = WriteObject(options, writer, ref state);
break;
case ClassType.Dictionary:
case ClassType.IDictionaryConstructible:
finishedSerializing = HandleDictionary(current.JsonClassInfo.ElementClassInfo, options, writer, ref state);
break;
default:
Debug.Assert(state.Current.JsonClassInfo.ClassType == ClassType.Unknown);
// Treat typeof(object) as an empty object.
finishedSerializing = WriteObject(options, writer, ref state);
break;
}
if (finishedSerializing)
{
if (writer.CurrentDepth == 0 || writer.CurrentDepth == originalWriterDepth)
{
break;
}
}
else if (writer.CurrentDepth >= options.EffectiveMaxDepth)
{
ThrowHelper.ThrowJsonException_DepthTooLarge(writer.CurrentDepth, state, options);
}
// If serialization is not yet end and we surpass beyond flush threshold return false and flush stream.
if (flushThreshold >= 0 && writer.BytesPending > flushThreshold)
{
return(false);
}
} while (true);
}
catch (InvalidOperationException ex) when(ex.Source == ThrowHelper.ExceptionSourceValueToRethrowAsJsonException)
{
ThrowHelper.ReThrowWithPath(state, ex);
}
catch (JsonException ex)
{
ThrowHelper.AddExceptionInformation(state, ex);
throw;
}
return(true);
}
private void InitializeConstructorParameters(ConstructorInfo constructorInfo)
{
ParameterInfo[] parameters = constructorInfo !.GetParameters();
Dictionary <string, JsonParameterInfo> parameterCache = CreateParameterCache(parameters.Length, Options);
Dictionary <string, JsonPropertyInfo> propertyCache = PropertyCache !;
foreach (ParameterInfo parameterInfo in parameters)
{
PropertyInfo?firstMatch = null;
bool isBound = false;
foreach (JsonPropertyInfo jsonPropertyInfo in PropertyCacheArray !)
{
// This is not null because it is an actual
// property on a type, not a "policy property".
PropertyInfo propertyInfo = jsonPropertyInfo.PropertyInfo !;
string camelCasePropName = JsonNamingPolicy.CamelCase.ConvertName(propertyInfo.Name);
if (parameterInfo.Name == camelCasePropName &&
parameterInfo.ParameterType == propertyInfo.PropertyType)
{
if (isBound)
{
Debug.Assert(firstMatch != null);
// Multiple object properties cannot bind to the same
// constructor parameter.
ThrowHelper.ThrowInvalidOperationException_MultiplePropertiesBindToConstructorParameters(
Type,
parameterInfo,
firstMatch,
propertyInfo,
constructorInfo);
}
JsonParameterInfo jsonParameterInfo = AddConstructorParameter(parameterInfo, jsonPropertyInfo, Options);
// One object property cannot map to multiple constructor
// parameters (ConvertName above can't return multiple strings).
parameterCache.Add(jsonParameterInfo.NameAsString, jsonParameterInfo);
// Remove property from deserialization cache to reduce the number of JsonPropertyInfos considered during JSON matching.
propertyCache.Remove(jsonPropertyInfo.NameAsString !);
isBound = true;
firstMatch = propertyInfo;
}
}
}
// It is invalid for the extension data property to bind with a constructor argument.
if (DataExtensionProperty != null &&
parameterCache.ContainsKey(DataExtensionProperty.NameAsString !))
{
ThrowHelper.ThrowInvalidOperationException_ExtensionDataCannotBindToCtorParam(DataExtensionProperty.PropertyInfo !, Type, constructorInfo);
}
ParameterCache = parameterCache;
ParameterCount = parameters.Length;
PropertyCache = propertyCache;
}
internal static void Unescape(ReadOnlySpan <byte> source, Span <byte> destination, int idx, out int written)
{
Debug.Assert(idx >= 0 && idx < source.Length);
Debug.Assert(source[idx] == JsonConstants.BackSlash);
Debug.Assert(destination.Length >= source.Length);
source.Slice(0, idx).CopyTo(destination);
written = idx;
for (; idx < source.Length; idx++)
{
byte currentByte = source[idx];
if (currentByte == JsonConstants.BackSlash)
{
idx++;
currentByte = source[idx];
if (currentByte == JsonConstants.Quote)
{
destination[written++] = JsonConstants.Quote;
}
else if (currentByte == 'n')
{
destination[written++] = JsonConstants.LineFeed;
}
else if (currentByte == 'r')
{
destination[written++] = JsonConstants.CarriageReturn;
}
else if (currentByte == JsonConstants.BackSlash)
{
destination[written++] = JsonConstants.BackSlash;
}
else if (currentByte == JsonConstants.Slash)
{
destination[written++] = JsonConstants.Slash;
}
else if (currentByte == 't')
{
destination[written++] = JsonConstants.Tab;
}
else if (currentByte == 'b')
{
destination[written++] = JsonConstants.BackSpace;
}
else if (currentByte == 'f')
{
destination[written++] = JsonConstants.FormFeed;
}
else if (currentByte == 'u')
{
// The source is known to be valid JSON, and hence if we see a \u, it is guaranteed to have 4 hex digits following it
// Otherwise, the Utf8JsonReader would have alreayd thrown an exception.
Debug.Assert(source.Length >= idx + 5);
bool result = Utf8Parser.TryParse(source.Slice(idx + 1, 4), out int scalar, out int bytesConsumed, 'x');
Debug.Assert(result);
Debug.Assert(bytesConsumed == 4);
idx += bytesConsumed; // The loop iteration will increment idx past the last hex digit
if (JsonHelpers.IsInRangeInclusive((uint)scalar, JsonConstants.HighSurrogateStartValue, JsonConstants.LowSurrogateEndValue))
{
// The first hex value cannot be a low surrogate.
if (scalar >= JsonConstants.LowSurrogateStartValue)
{
ThrowHelper.ThrowInvalidOperationException_ReadInvalidUTF16(scalar);
}
Debug.Assert(JsonHelpers.IsInRangeInclusive((uint)scalar, JsonConstants.HighSurrogateStartValue, JsonConstants.HighSurrogateEndValue));
idx += 3; // Skip the last hex digit and the next \u
// We must have a low surrogate following a high surrogate.
if (source.Length < idx + 4 || source[idx - 2] != '\\' || source[idx - 1] != 'u')
{
ThrowHelper.ThrowInvalidOperationException_ReadInvalidUTF16();
}
// The source is known to be valid JSON, and hence if we see a \u, it is guaranteed to have 4 hex digits following it
// Otherwise, the Utf8JsonReader would have alreayd thrown an exception.
result = Utf8Parser.TryParse(source.Slice(idx, 4), out int lowSurrogate, out bytesConsumed, 'x');
Debug.Assert(result);
Debug.Assert(bytesConsumed == 4);
// If the first hex value is a high surrogate, the next one must be a low surrogate.
if (!JsonHelpers.IsInRangeInclusive((uint)lowSurrogate, JsonConstants.LowSurrogateStartValue, JsonConstants.LowSurrogateEndValue))
{
ThrowHelper.ThrowInvalidOperationException_ReadInvalidUTF16(lowSurrogate);
}
idx += bytesConsumed - 1; // The loop iteration will increment idx past the last hex digit
// To find the unicode scalar:
// (0x400 * (High surrogate - 0xD800)) + Low surrogate - 0xDC00 + 0x10000
scalar = (JsonConstants.BitShiftBy10 * (scalar - JsonConstants.HighSurrogateStartValue))
+ (lowSurrogate - JsonConstants.LowSurrogateStartValue)
+ JsonConstants.UnicodePlane01StartValue;
}
#if BUILDING_INBOX_LIBRARY
var rune = new Rune(scalar);
int bytesWritten = rune.EncodeToUtf8(destination.Slice(written));
#else
EncodeToUtf8Bytes((uint)scalar, destination.Slice(written), out int bytesWritten);
#endif
Debug.Assert(bytesWritten <= 4);
written += bytesWritten;
}
}
else
{
destination[written++] = currentByte;
}
}
}
// If this method is changed, also change ApplyValueToEnumerable.
internal static void ApplyObjectToEnumerable(
object value,
ref ReadStack state,
ref Utf8JsonReader reader,
bool setPropertyDirectly = false)
{
Debug.Assert(!state.Current.SkipProperty);
if (state.Current.IsEnumerable)
{
if (state.Current.TempEnumerableValues != null)
{
state.Current.TempEnumerableValues.Add(value);
}
else
{
if (!(state.Current.ReturnValue is IList list))
{
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(value.GetType(), reader, state.JsonPath);
return;
}
list.Add(value);
}
}
else if (!setPropertyDirectly && state.Current.IsEnumerableProperty)
{
Debug.Assert(state.Current.JsonPropertyInfo != null);
Debug.Assert(state.Current.ReturnValue != null);
if (state.Current.TempEnumerableValues != null)
{
state.Current.TempEnumerableValues.Add(value);
}
else
{
IList list = (IList)state.Current.JsonPropertyInfo.GetValueAsObject(state.Current.ReturnValue);
if (list == null)
{
state.Current.JsonPropertyInfo.SetValueAsObject(state.Current.ReturnValue, value);
}
else
{
list.Add(value);
}
}
}
else if (state.Current.IsDictionary || (state.Current.IsDictionaryProperty && !setPropertyDirectly))
{
Debug.Assert(state.Current.ReturnValue != null);
IDictionary dictionary = (IDictionary)state.Current.JsonPropertyInfo.GetValueAsObject(state.Current.ReturnValue);
string key = state.Current.KeyName;
Debug.Assert(!string.IsNullOrEmpty(key));
dictionary[key] = value;
}
else if (state.Current.IsIDictionaryConstructible ||
(state.Current.IsIDictionaryConstructibleProperty && !setPropertyDirectly))
{
Debug.Assert(state.Current.TempDictionaryValues != null);
IDictionary dictionary = (IDictionary)state.Current.JsonPropertyInfo.GetValueAsObject(state.Current.TempDictionaryValues);
string key = state.Current.KeyName;
Debug.Assert(!string.IsNullOrEmpty(key));
dictionary[key] = value;
}
else
{
Debug.Assert(state.Current.JsonPropertyInfo != null);
state.Current.JsonPropertyInfo.SetValueAsObject(state.Current.ReturnValue, value);
}
}
/// <summary>
/// Returns true if successful, false is the reader ran out of buffer.
/// Sets state.Current.ReturnValue to the $ref target for MetadataRefProperty cases.
/// </summary>
internal static bool ResolveMetadata(
JsonConverter converter,
ref Utf8JsonReader reader,
ref ReadStack state)
{
if (state.Current.ObjectState < StackFrameObjectState.ReadAheadNameOrEndObject)
{
// Read the first metadata property name.
if (!ReadAheadMetataDataAndSetState(ref reader, ref state, StackFrameObjectState.ReadNameOrEndObject))
{
return(false);
}
}
if (state.Current.ObjectState == StackFrameObjectState.ReadNameOrEndObject)
{
if (reader.TokenType != JsonTokenType.PropertyName)
{
// An enumerable needs metadata since it starts with StartObject.
if (converter.ClassType == ClassType.Enumerable)
{
ThrowHelper.ThrowJsonException_MetadataPreservedArrayValuesNotFound(converter.TypeToConvert);
}
// The reader should have detected other invalid cases.
Debug.Assert(reader.TokenType == JsonTokenType.EndObject);
// Skip the read of the first property name, since we already read it above.
state.Current.PropertyState = StackFramePropertyState.ReadName;
return(true);
}
ReadOnlySpan <byte> propertyName = reader.GetSpan();
MetadataPropertyName metadata = GetMetadataPropertyName(propertyName);
if (metadata == MetadataPropertyName.Id)
{
state.Current.JsonPropertyName = propertyName.ToArray();
if (!converter.CanHaveIdMetadata)
{
ThrowHelper.ThrowJsonException_MetadataCannotParsePreservedObjectIntoImmutable(converter.TypeToConvert);
}
state.Current.ObjectState = StackFrameObjectState.ReadAheadIdValue;
}
else if (metadata == MetadataPropertyName.Ref)
{
state.Current.JsonPropertyName = propertyName.ToArray();
if (converter.IsValueType)
{
ThrowHelper.ThrowJsonException_MetadataInvalidReferenceToValueType(converter.TypeToConvert);
}
state.Current.ObjectState = StackFrameObjectState.ReadAheadRefValue;
}
else if (metadata == MetadataPropertyName.Values)
{
state.Current.JsonPropertyName = propertyName.ToArray();
if (converter.ClassType == ClassType.Enumerable)
{
ThrowHelper.ThrowJsonException_MetadataMissingIdBeforeValues();
}
else
{
ThrowHelper.ThrowJsonException_MetadataInvalidPropertyWithLeadingDollarSign(propertyName, ref state, reader);
}
}
else
{
Debug.Assert(metadata == MetadataPropertyName.NoMetadata);
// Having a StartObject without metadata properties is not allowed.
if (converter.ClassType == ClassType.Enumerable)
{
state.Current.JsonPropertyName = propertyName.ToArray();
ThrowHelper.ThrowJsonException_MetadataPreservedArrayInvalidProperty(converter.TypeToConvert, reader);
}
// Skip the read of the first property name, since we already read it above.
state.Current.PropertyState = StackFramePropertyState.ReadName;
return(true);
}
}
if (state.Current.ObjectState == StackFrameObjectState.ReadAheadRefValue)
{
if (!ReadAheadMetataDataAndSetState(ref reader, ref state, StackFrameObjectState.ReadRefValue))
{
return(false);
}
}
else if (state.Current.ObjectState == StackFrameObjectState.ReadAheadIdValue)
{
if (!ReadAheadMetataDataAndSetState(ref reader, ref state, StackFrameObjectState.ReadIdValue))
{
return(false);
}
}
if (state.Current.ObjectState == StackFrameObjectState.ReadRefValue)
{
if (reader.TokenType != JsonTokenType.String)
{
ThrowHelper.ThrowJsonException_MetadataValueWasNotString(reader.TokenType);
}
string key = reader.GetString() !;
// todo: https://github.com/dotnet/runtime/issues/32354
state.Current.ReturnValue = state.ReferenceResolver.ResolveReferenceOnDeserialize(key);
state.Current.ObjectState = StackFrameObjectState.ReadAheadRefEndObject;
}
else if (state.Current.ObjectState == StackFrameObjectState.ReadIdValue)
{
if (reader.TokenType != JsonTokenType.String)
{
ThrowHelper.ThrowJsonException_MetadataValueWasNotString(reader.TokenType);
}
state.Current.MetadataId = reader.GetString();
// Clear the MetadataPropertyName since we are done processing Id.
state.Current.JsonPropertyName = default;
if (converter.ClassType == ClassType.Enumerable)
{
// Need to Read $values property name.
state.Current.ObjectState = StackFrameObjectState.ReadAheadValuesName;
}
else
{
// We are done reading metadata.
state.Current.ObjectState = StackFrameObjectState.PropertyValue;
return(true);
}
}
if (state.Current.ObjectState == StackFrameObjectState.ReadAheadRefEndObject)
{
if (!ReadAheadMetataDataAndSetState(ref reader, ref state, StackFrameObjectState.ReadRefEndObject))
{
return(false);
}
}
if (state.Current.ObjectState == StackFrameObjectState.ReadRefEndObject)
{
if (reader.TokenType != JsonTokenType.EndObject)
{
// We just read a property. The only valid next tokens are EndObject and PropertyName.
Debug.Assert(reader.TokenType == JsonTokenType.PropertyName);
ThrowHelper.ThrowJsonException_MetadataReferenceObjectCannotContainOtherProperties(reader.GetSpan(), ref state);
}
return(true);
}
if (state.Current.ObjectState == StackFrameObjectState.ReadAheadValuesName)
{
if (!ReadAheadMetataDataAndSetState(ref reader, ref state, StackFrameObjectState.ReadValuesName))
{
return(false);
}
}
if (state.Current.ObjectState == StackFrameObjectState.ReadValuesName)
{
if (reader.TokenType != JsonTokenType.PropertyName)
{
ThrowHelper.ThrowJsonException_MetadataPreservedArrayValuesNotFound(converter.TypeToConvert);
}
ReadOnlySpan <byte> propertyName = reader.GetSpan();
// Remember the property in case we get an exception.
state.Current.JsonPropertyName = propertyName.ToArray();
if (GetMetadataPropertyName(propertyName) != MetadataPropertyName.Values)
{
ThrowHelper.ThrowJsonException_MetadataPreservedArrayInvalidProperty(converter.TypeToConvert, reader);
}
state.Current.ObjectState = StackFrameObjectState.ReadAheadValuesStartArray;
}
if (state.Current.ObjectState == StackFrameObjectState.ReadAheadValuesStartArray)
{
if (!ReadAheadMetataDataAndSetState(ref reader, ref state, StackFrameObjectState.ReadValuesStartArray))
{
return(false);
}
}
if (state.Current.ObjectState == StackFrameObjectState.ReadValuesStartArray)
{
if (reader.TokenType != JsonTokenType.StartArray)
{
ThrowHelper.ThrowJsonException_MetadataValuesInvalidToken(reader.TokenType);
}
state.Current.ObjectState = StackFrameObjectState.PropertyValue;
}
return(true);
}
internal JsonConverter GetConverterInternal(Type typeToConvert)
{
Debug.Assert(typeToConvert != null);
if (_converters.TryGetValue(typeToConvert, out JsonConverter? converter))
{
Debug.Assert(converter != null);
return(converter);
}
// Priority 1: If there is a JsonSerializerContext, fetch the converter from there.
converter = _context?.GetTypeInfo(typeToConvert)?.PropertyInfoForTypeInfo?.ConverterBase;
// Priority 2: Attempt to get custom converter added at runtime.
// Currently there is not a way at runtime to override the [JsonConverter] when applied to a property.
foreach (JsonConverter item in Converters)
{
if (item.CanConvert(typeToConvert))
{
converter = item;
break;
}
}
// Priority 3: Attempt to get converter from [JsonConverter] on the type being converted.
if (converter == null)
{
JsonConverterAttribute?converterAttribute = (JsonConverterAttribute?)
GetAttributeThatCanHaveMultiple(typeToConvert, typeof(JsonConverterAttribute));
if (converterAttribute != null)
{
converter = GetConverterFromAttribute(converterAttribute, typeToConvert: typeToConvert, classTypeAttributeIsOn: typeToConvert, memberInfo: null);
}
}
// Priority 4: Attempt to get built-in converter.
if (converter == null)
{
if (s_defaultSimpleConverters == null || s_defaultFactoryConverters == null)
{
// (De)serialization using serializer's options-based methods has not yet occurred, so the built-in converters are not rooted.
// Even though source-gen code paths do not call this method <i.e. JsonSerializerOptions.GetConverter(Type)>, we do not root all the
// built-in converters here since we fetch converters for any type included for source generation from the binded context (Priority 1).
Debug.Assert(s_defaultSimpleConverters == null);
Debug.Assert(s_defaultFactoryConverters == null);
ThrowHelper.ThrowNotSupportedException_BuiltInConvertersNotRooted(typeToConvert);
return(null !);
}
if (s_defaultSimpleConverters.TryGetValue(typeToConvert, out JsonConverter? foundConverter))
{
Debug.Assert(foundConverter != null);
converter = foundConverter;
}
else
{
foreach (JsonConverter item in s_defaultFactoryConverters)
{
if (item.CanConvert(typeToConvert))
{
converter = item;
break;
}
}
// Since the object and IEnumerable converters cover all types, we should have a converter.
Debug.Assert(converter != null);
}
}
// Allow redirection for generic types or the enum converter.
if (converter is JsonConverterFactory factory)
{
converter = factory.GetConverterInternal(typeToConvert, this);
// A factory cannot return null; GetConverterInternal checked for that.
Debug.Assert(converter != null);
}
Type converterTypeToConvert = converter.TypeToConvert;
if (!converterTypeToConvert.IsAssignableFromInternal(typeToConvert) &&
!typeToConvert.IsAssignableFromInternal(converterTypeToConvert))
{
ThrowHelper.ThrowInvalidOperationException_SerializationConverterNotCompatible(converter.GetType(), typeToConvert);
}
// Only cache the value once (de)serialization has occurred since new converters can be added that may change the result.
if (_haveTypesBeenCreated)
{
// A null converter is allowed here and cached.
// Ignore failure case here in multi-threaded cases since the cached item will be equivalent.
_converters.TryAdd(typeToConvert, converter);
}
return(converter);
}
/// <summary>
/// Returns the converter for the specified type.
/// </summary>
/// <param name="typeToConvert">The type to return a converter for.</param>
/// <returns>
/// The converter for the given type.
/// </returns>
/// <exception cref="InvalidOperationException">
/// The configured <see cref="JsonConverter"/> for <paramref name="typeToConvert"/> returned an invalid converter.
/// </exception>
/// <exception cref="NotSupportedException">
/// There is no compatible <see cref="System.Text.Json.Serialization.JsonConverter"/>
/// for <paramref name="typeToConvert"/> or its serializable members.
/// </exception>
public JsonConverter GetConverter(Type typeToConvert)
{
if (_converters.TryGetValue(typeToConvert, out JsonConverter? converter))
{
Debug.Assert(converter != null);
return(converter);
}
// Priority 2: Attempt to get custom converter added at runtime.
// Currently there is not a way at runtime to overide the [JsonConverter] when applied to a property.
foreach (JsonConverter item in Converters)
{
if (item.CanConvert(typeToConvert))
{
converter = item;
break;
}
}
// Priority 3: Attempt to get converter from [JsonConverter] on the type being converted.
if (converter == null)
{
JsonConverterAttribute?converterAttribute = (JsonConverterAttribute?)
GetAttributeThatCanHaveMultiple(typeToConvert, typeof(JsonConverterAttribute));
if (converterAttribute != null)
{
converter = GetConverterFromAttribute(converterAttribute, typeToConvert: typeToConvert, classTypeAttributeIsOn: typeToConvert, memberInfo: null);
}
}
// Priority 4: Attempt to get built-in converter.
if (converter == null)
{
if (s_defaultSimpleConverters.TryGetValue(typeToConvert, out JsonConverter? foundConverter))
{
Debug.Assert(foundConverter != null);
converter = foundConverter;
}
else
{
foreach (JsonConverter item in s_defaultFactoryConverters)
{
if (item.CanConvert(typeToConvert))
{
converter = item;
break;
}
}
// Since the object and IEnumerable converters cover all types, we should have a converter.
Debug.Assert(converter != null);
}
}
// Allow redirection for generic types or the enum converter.
if (converter is JsonConverterFactory factory)
{
converter = factory.GetConverterInternal(typeToConvert, this);
// A factory cannot return null; GetConverterInternal checked for that.
Debug.Assert(converter != null);
}
Type converterTypeToConvert = converter.TypeToConvert;
if (!converterTypeToConvert.IsAssignableFromInternal(typeToConvert) &&
!typeToConvert.IsAssignableFromInternal(converterTypeToConvert))
{
ThrowHelper.ThrowInvalidOperationException_SerializationConverterNotCompatible(converter.GetType(), typeToConvert);
}
// Only cache the value once (de)serialization has occurred since new converters can be added that may change the result.
if (_haveTypesBeenCreated)
{
// A null converter is allowed here and cached.
// Ignore failure case here in multi-threaded cases since the cached item will be equivalent.
_converters.TryAdd(typeToConvert, converter);
}
return(converter);
}
public JsonClassInfo(Type type, JsonSerializerOptions options)
{
Type = type;
Options = options;
JsonConverter converter = GetConverter(
Type,
parentClassType: null, // A ClassInfo never has a "parent" class.
propertyInfo: null, // A ClassInfo never has a "parent" property.
out Type runtimeType,
Options);
ClassType = converter.ClassType;
PropertyInfoForClassInfo = CreatePropertyInfoForClassInfo(Type, runtimeType, converter, Options);
switch (ClassType)
{
case ClassType.Object:
{
CreateObject = options.MemberAccessorStrategy.CreateConstructor(type);
Dictionary <string, JsonPropertyInfo> cache = new Dictionary <string, JsonPropertyInfo>(
Options.PropertyNameCaseInsensitive
? StringComparer.OrdinalIgnoreCase
: StringComparer.Ordinal);
for (Type?currentType = type; currentType != null; currentType = currentType.BaseType)
{
foreach (PropertyInfo propertyInfo in currentType.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly))
{
// Ignore indexers
if (propertyInfo.GetIndexParameters().Length > 0)
{
continue;
}
// For now we only support public getters\setters
if (propertyInfo.GetMethod?.IsPublic == true ||
propertyInfo.SetMethod?.IsPublic == true)
{
JsonPropertyInfo jsonPropertyInfo = AddProperty(propertyInfo, currentType, options);
Debug.Assert(jsonPropertyInfo != null && jsonPropertyInfo.NameAsString != null);
// If the JsonPropertyNameAttribute or naming policy results in collisions, throw an exception.
if (!JsonHelpers.TryAdd(cache, jsonPropertyInfo.NameAsString, jsonPropertyInfo))
{
JsonPropertyInfo other = cache[jsonPropertyInfo.NameAsString];
if (other.ShouldDeserialize == false && other.ShouldSerialize == false)
{
// Overwrite the one just added since it has [JsonIgnore].
cache[jsonPropertyInfo.NameAsString] = jsonPropertyInfo;
}
else if (other.PropertyInfo?.Name != jsonPropertyInfo.PropertyInfo?.Name &&
(jsonPropertyInfo.ShouldDeserialize == true || jsonPropertyInfo.ShouldSerialize == true))
{
// Check for name equality is required to determine when a new slot is used for the member.
// Therefore, if names are not the same, there is conflict due to the name policy or attributes.
ThrowHelper.ThrowInvalidOperationException_SerializerPropertyNameConflict(Type, jsonPropertyInfo);
}
// else ignore jsonPropertyInfo since it has [JsonIgnore] or it's hidden by a new slot.
}
}
else
{
if (JsonPropertyInfo.GetAttribute <JsonIncludeAttribute>(propertyInfo) != null)
{
ThrowHelper.ThrowInvalidOperationException_JsonIncludeOnNonPublicInvalid(propertyInfo, currentType);
}
// Non-public properties should not be included for (de)serialization.
}
}
}
JsonPropertyInfo[] cacheArray;
if (DetermineExtensionDataProperty(cache))
{
// Remove from cache since it is handled independently.
cache.Remove(DataExtensionProperty !.NameAsString !);
cacheArray = new JsonPropertyInfo[cache.Count + 1];
// Set the last element to the extension property.
cacheArray[cache.Count] = DataExtensionProperty;
}
else
{
cacheArray = new JsonPropertyInfo[cache.Count];
}
// Copy the dictionary cache to the array cache.
cache.Values.CopyTo(cacheArray, 0);
// Set the array cache field at this point since it is completely initialized.
// It can now be safely accessed by other threads.
PropertyCacheArray = cacheArray;
// Allow constructor parameter logic to remove items from the dictionary since the JSON
// property values will be passed to the constructor and do not call a property setter.
if (converter.ConstructorIsParameterized)
{
InitializeConstructorParameters(cache, converter.ConstructorInfo !);
}
// Set the dictionary cache field at this point since it is completely initialized.
// It can now be safely accessed by other threads.
PropertyCache = cache;
}
break;
case ClassType.Enumerable:
case ClassType.Dictionary:
{
ElementType = converter.ElementType;
CreateObject = options.MemberAccessorStrategy.CreateConstructor(runtimeType);
}
break;
case ClassType.Value:
case ClassType.NewValue:
{
CreateObject = options.MemberAccessorStrategy.CreateConstructor(type);
}
break;
case ClassType.None:
{
ThrowHelper.ThrowNotSupportedException_SerializationNotSupported(type);
}
break;
default:
Debug.Fail($"Unexpected class type: {ClassType}");
throw new InvalidOperationException();
}
}
public JsonClassInfo(Type type, JsonSerializerOptions options)
{
Type = type;
Options = options;
JsonConverter converter = GetConverter(
Type,
parentClassType: null, // A ClassInfo never has a "parent" class.
propertyInfo: null, // A ClassInfo never has a "parent" property.
out Type runtimeType,
Options);
ClassType = converter.ClassType;
PropertyInfoForClassInfo = CreatePropertyInfoForClassInfo(Type, runtimeType, converter, Options);
switch (ClassType)
{
case ClassType.Object:
{
CreateObject = options.MemberAccessorStrategy.CreateConstructor(type);
Dictionary <string, JsonPropertyInfo> cache = new Dictionary <string, JsonPropertyInfo>(
Options.PropertyNameCaseInsensitive
? StringComparer.OrdinalIgnoreCase
: StringComparer.Ordinal);
Dictionary <string, PropertyInfo>?ignoredProperties = null;
// We start from the most derived type.
for (Type?currentType = type; currentType != null; currentType = currentType.BaseType)
{
foreach (PropertyInfo propertyInfo in currentType.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.DeclaredOnly))
{
// Ignore indexers and virtual properties that have overrides that were [JsonIgnore]d.
if (propertyInfo.GetIndexParameters().Length > 0 || PropertyIsOverridenAndIgnored(propertyInfo, ignoredProperties))
{
continue;
}
// For now we only support public properties (i.e. setter and/or getter is public).
if (propertyInfo.GetMethod?.IsPublic == true ||
propertyInfo.SetMethod?.IsPublic == true)
{
JsonPropertyInfo jsonPropertyInfo = AddProperty(propertyInfo, currentType, options);
Debug.Assert(jsonPropertyInfo != null && jsonPropertyInfo.NameAsString != null);
string propertyName = propertyInfo.Name;
// The JsonPropertyNameAttribute or naming policy resulted in a collision.
if (!JsonHelpers.TryAdd(cache, jsonPropertyInfo.NameAsString, jsonPropertyInfo))
{
JsonPropertyInfo other = cache[jsonPropertyInfo.NameAsString];
if (other.IsIgnored)
{
// Overwrite previously cached property since it has [JsonIgnore].
cache[jsonPropertyInfo.NameAsString] = jsonPropertyInfo;
}
else if (
// Does the current property have `JsonIgnoreAttribute`?
!jsonPropertyInfo.IsIgnored &&
// Is the current property hidden by the previously cached property
// (with `new` keyword, or by overriding)?
other.PropertyInfo !.Name != propertyName &&
// Was a property with the same CLR name ignored? That property hid the current property,
// thus, if it was ignored, the current property should be ignored too.
ignoredProperties?.ContainsKey(propertyName) != true
)
{
// Throw if we have two public properties with the same JSON property name,
// neither overrides or hides the other, and neither have been ignored.
ThrowHelper.ThrowInvalidOperationException_SerializerPropertyNameConflict(Type, jsonPropertyInfo);
}
// Ignore the current property.
}
if (jsonPropertyInfo.IsIgnored)
{
(ignoredProperties ??= new Dictionary <string, PropertyInfo>())[propertyName] = propertyInfo;
public JsonClassInfo(Type type, JsonSerializerOptions options)
{
Type = type;
Options = options;
JsonConverter converter = GetConverter(
Type,
parentClassType: null, // A ClassInfo never has a "parent" class.
memberInfo: null, // A ClassInfo never has a "parent" property.
out Type runtimeType,
Options);
ClassType = converter.ClassType;
JsonNumberHandling?typeNumberHandling = GetNumberHandlingForType(Type);
PropertyInfoForClassInfo = CreatePropertyInfoForClassInfo(Type, runtimeType, converter, Options);
switch (ClassType)
{
case ClassType.Object:
{
CreateObject = Options.MemberAccessorStrategy.CreateConstructor(type);
Dictionary <string, JsonPropertyInfo> cache = new Dictionary <string, JsonPropertyInfo>(
Options.PropertyNameCaseInsensitive
? StringComparer.OrdinalIgnoreCase
: StringComparer.Ordinal);
Dictionary <string, MemberInfo>?ignoredMembers = null;
// We start from the most derived type.
for (Type?currentType = type; currentType != null; currentType = currentType.BaseType)
{
const BindingFlags bindingFlags =
BindingFlags.Instance |
BindingFlags.Public |
BindingFlags.NonPublic |
BindingFlags.DeclaredOnly;
foreach (PropertyInfo propertyInfo in currentType.GetProperties(bindingFlags))
{
// Ignore indexers and virtual properties that have overrides that were [JsonIgnore]d.
if (propertyInfo.GetIndexParameters().Length > 0 || PropertyIsOverridenAndIgnored(propertyInfo, ignoredMembers))
{
continue;
}
// For now we only support public properties (i.e. setter and/or getter is public).
if (propertyInfo.GetMethod?.IsPublic == true ||
propertyInfo.SetMethod?.IsPublic == true)
{
CacheMember(currentType, propertyInfo.PropertyType, propertyInfo, typeNumberHandling, cache, ref ignoredMembers);
}
else
{
if (JsonPropertyInfo.GetAttribute <JsonIncludeAttribute>(propertyInfo) != null)
{
ThrowHelper.ThrowInvalidOperationException_JsonIncludeOnNonPublicInvalid(propertyInfo, currentType);
}
// Non-public properties should not be included for (de)serialization.
}
}
foreach (FieldInfo fieldInfo in currentType.GetFields(bindingFlags))
{
if (PropertyIsOverridenAndIgnored(fieldInfo, ignoredMembers))
{
continue;
}
bool hasJsonInclude = JsonPropertyInfo.GetAttribute <JsonIncludeAttribute>(fieldInfo) != null;
if (fieldInfo.IsPublic)
{
if (hasJsonInclude || Options.IncludeFields)
{
CacheMember(currentType, fieldInfo.FieldType, fieldInfo, typeNumberHandling, cache, ref ignoredMembers);
}
}
else
{
if (hasJsonInclude)
{
ThrowHelper.ThrowInvalidOperationException_JsonIncludeOnNonPublicInvalid(fieldInfo, currentType);
}
// Non-public fields should not be included for (de)serialization.
}
}
}
JsonPropertyInfo[] cacheArray;
if (DetermineExtensionDataProperty(cache))
{
// Remove from cache since it is handled independently.
cache.Remove(DataExtensionProperty !.NameAsString);
cacheArray = new JsonPropertyInfo[cache.Count + 1];
// Set the last element to the extension property.
cacheArray[cache.Count] = DataExtensionProperty;
}
else
{
cacheArray = new JsonPropertyInfo[cache.Count];
}
// Copy the dictionary cache to the array cache.
cache.Values.CopyTo(cacheArray, 0);
// These are not accessed by other threads until the current JsonClassInfo instance
// is finished initializing and added to the cache on JsonSerializerOptions.
PropertyCache = cache;
PropertyCacheArray = cacheArray;
// Allow constructor parameter logic to remove items from the dictionary since the JSON
// property values will be passed to the constructor and do not call a property setter.
if (converter.ConstructorIsParameterized)
{
InitializeConstructorParameters(converter.ConstructorInfo !);
}
}
break;
case ClassType.Enumerable:
case ClassType.Dictionary:
{
ElementType = converter.ElementType;
CreateObject = Options.MemberAccessorStrategy.CreateConstructor(runtimeType);
}
break;
case ClassType.Value:
case ClassType.NewValue:
{
CreateObject = Options.MemberAccessorStrategy.CreateConstructor(type);
}
break;
case ClassType.None:
{
ThrowHelper.ThrowNotSupportedException_SerializationNotSupported(type);
}
break;
default:
Debug.Fail($"Unexpected class type: {ClassType}");
throw new InvalidOperationException();
}
}
public T?SetValue(string propertyName, T?value, Action?assignParent = null)
{
if (IsReadOnly)
{
ThrowHelper.ThrowNotSupportedException_NodeCollectionIsReadOnly();
}
if (propertyName == null)
{
throw new ArgumentNullException(nameof(propertyName));
}
CreateDictionaryIfThresholdMet();
T?existing = null;
if (_propertyDictionary != null)
{
// Fast path if item doesn't exist in dictionary.
if (JsonHelpers.TryAdd(_propertyDictionary, propertyName, value))
{
assignParent?.Invoke();
_propertyList.Add(new KeyValuePair <string, T?>(propertyName, value));
return(null);
}
existing = _propertyDictionary[propertyName];
if (ReferenceEquals(existing, value))
{
// Ignore if the same value.
return(null);
}
}
int i = FindValueIndex(propertyName);
if (i >= 0)
{
if (_propertyDictionary != null)
{
_propertyDictionary[propertyName] = value;
}
else
{
KeyValuePair <string, T?> current = _propertyList[i];
if (ReferenceEquals(current.Value, value))
{
// Ignore if the same value.
return(null);
}
existing = current.Value;
}
assignParent?.Invoke();
_propertyList[i] = new KeyValuePair <string, T?>(propertyName, value);
}
else
{
assignParent?.Invoke();
_propertyDictionary?.Add(propertyName, value);
_propertyList.Add(new KeyValuePair <string, T?>(propertyName, value));
Debug.Assert(existing == null);
}
return(existing);
}
private static void HandleStartDictionary(JsonSerializerOptions options, ref ReadStack state)
{
Debug.Assert(!state.Current.IsProcessingEnumerable());
JsonPropertyInfo jsonPropertyInfo = state.Current.JsonPropertyInfo;
if (jsonPropertyInfo == null)
{
jsonPropertyInfo = state.Current.JsonClassInfo.CreateRootObject(options);
}
Debug.Assert(jsonPropertyInfo != null);
// A nested object or dictionary so push new frame.
if (state.Current.CollectionPropertyInitialized)
{
state.Push();
state.Current.JsonClassInfo = jsonPropertyInfo.ElementClassInfo;
state.Current.InitializeJsonPropertyInfo();
JsonClassInfo classInfo = state.Current.JsonClassInfo;
if (state.Current.IsProcessingIDictionaryConstructible())
{
state.Current.TempDictionaryValues = (IDictionary)classInfo.CreateConcreteDictionary();
state.Current.CollectionPropertyInitialized = true;
}
else if (state.Current.IsProcessingDictionary())
{
if (classInfo.CreateObject == null)
{
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(classInfo.Type, parentType: null, memberInfo: null);
}
state.Current.ReturnValue = classInfo.CreateObject();
state.Current.CollectionPropertyInitialized = true;
}
else if (state.Current.IsProcessingObject(ClassType.Object))
{
if (classInfo.CreateObject == null)
{
ThrowHelper.ThrowNotSupportedException_DeserializeCreateObjectDelegateIsNull(classInfo.Type);
}
state.Current.ReturnValue = classInfo.CreateObject();
}
else
{
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(classInfo.Type);
}
return;
}
state.Current.CollectionPropertyInitialized = true;
if (state.Current.IsProcessingIDictionaryConstructible())
{
JsonClassInfo dictionaryClassInfo;
if (jsonPropertyInfo.DeclaredPropertyType == jsonPropertyInfo.ImplementedPropertyType)
{
dictionaryClassInfo = options.GetOrAddClass(jsonPropertyInfo.RuntimePropertyType);
}
else
{
dictionaryClassInfo = options.GetOrAddClass(jsonPropertyInfo.DeclaredPropertyType);
}
state.Current.TempDictionaryValues = (IDictionary)dictionaryClassInfo.CreateConcreteDictionary();
}
else
{
// Create the dictionary.
JsonClassInfo dictionaryClassInfo = jsonPropertyInfo.RuntimeClassInfo;
IDictionary value = (IDictionary)dictionaryClassInfo.CreateObject();
if (value != null)
{
if (state.Current.ReturnValue != null)
{
state.Current.JsonPropertyInfo.SetValueAsObject(state.Current.ReturnValue, value);
}
else
{
// A dictionary is being returned directly, or a nested dictionary.
state.Current.SetReturnValue(value);
}
}
}
}
public JsonClassInfo(Type type, JsonSerializerOptions options)
{
Type = type;
Options = options;
ClassType = GetClassType(
type,
parentClassType: type,
propertyInfo: null,
out Type runtimeType,
out Type elementType,
out Type nullableUnderlyingType,
out MethodInfo addMethod,
out JsonConverter converter,
checkForAddMethod: true,
options);
// Ignore properties on enumerable.
switch (ClassType)
{
case ClassType.Object:
{
CreateObject = options.MemberAccessorStrategy.CreateConstructor(type);
PropertyInfo[] properties = type.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
Dictionary <string, JsonPropertyInfo> cache = CreatePropertyCache(properties.Length);
foreach (PropertyInfo propertyInfo in properties)
{
// Ignore indexers
if (propertyInfo.GetIndexParameters().Length > 0)
{
continue;
}
// For now we only support public getters\setters
if (propertyInfo.GetMethod?.IsPublic == true ||
propertyInfo.SetMethod?.IsPublic == true)
{
JsonPropertyInfo jsonPropertyInfo = AddProperty(propertyInfo.PropertyType, propertyInfo, type, options);
Debug.Assert(jsonPropertyInfo != null);
// If the JsonPropertyNameAttribute or naming policy results in collisions, throw an exception.
if (!JsonHelpers.TryAdd(cache, jsonPropertyInfo.NameAsString, jsonPropertyInfo))
{
JsonPropertyInfo other = cache[jsonPropertyInfo.NameAsString];
if (other.ShouldDeserialize == false && other.ShouldSerialize == false)
{
// Overwrite the one just added since it has [JsonIgnore].
cache[jsonPropertyInfo.NameAsString] = jsonPropertyInfo;
}
else if (jsonPropertyInfo.ShouldDeserialize == true || jsonPropertyInfo.ShouldSerialize == true)
{
ThrowHelper.ThrowInvalidOperationException_SerializerPropertyNameConflict(this, jsonPropertyInfo);
}
// else ignore jsonPropertyInfo since it has [JsonIgnore].
}
}
}
JsonPropertyInfo[] cacheArray;
if (DetermineExtensionDataProperty(cache))
{
// Remove from cache since it is handled independently.
cache.Remove(DataExtensionProperty.NameAsString);
cacheArray = new JsonPropertyInfo[cache.Count + 1];
// Set the last element to the extension property.
cacheArray[cache.Count] = DataExtensionProperty;
}
else
{
cacheArray = new JsonPropertyInfo[cache.Count];
}
// Set fields when finished to avoid concurrency issues.
PropertyCache = cache;
cache.Values.CopyTo(cacheArray, 0);
PropertyCacheArray = cacheArray;
}
break;
case ClassType.Enumerable:
case ClassType.Dictionary:
{
// Add a single property that maps to the class type so we can have policies applied.
ElementType = elementType;
AddItemToObject = addMethod;
// A policy property is not a real property on a type; instead it leverages the existing converter
// logic and generic support to avoid boxing. It is used with values types, elements from collections and
// dictionaries, and collections themselves. Typically it would represent a CLR type such as System.String.
PolicyProperty = CreateProperty(
declaredPropertyType: type,
runtimePropertyType: runtimeType,
propertyInfo: null, // Not a real property so this is null.
parentClassType: typeof(object),
collectionElementType: elementType,
nullableUnderlyingType,
converter: null,
ClassType,
options);
CreateObject = options.MemberAccessorStrategy.CreateConstructor(PolicyProperty.RuntimePropertyType);
}
break;
case ClassType.Value:
{
CreateObject = options.MemberAccessorStrategy.CreateConstructor(type);
// Add a single property that maps to the class type so we can have policies applied.
//AddPolicyPropertyForValue(type, options);
PolicyProperty = CreateProperty(
declaredPropertyType: type,
runtimePropertyType: runtimeType,
propertyInfo: null, // Not a real property so this is null.
parentClassType: typeof(object),
collectionElementType: null,
nullableUnderlyingType,
converter,
ClassType,
options);
}
break;
case ClassType.Unknown:
{
CreateObject = options.MemberAccessorStrategy.CreateConstructor(type);
// Add a single property that maps to the class type so we can have policies applied.
//AddPolicyPropertyForValue(type, options);
PolicyProperty = CreateProperty(
declaredPropertyType: type,
runtimePropertyType: runtimeType,
propertyInfo: null, // Not a real property so this is null.
parentClassType: typeof(object),
collectionElementType: null,
nullableUnderlyingType,
converter,
ClassType,
options);
PropertyCache = new Dictionary <string, JsonPropertyInfo>();
PropertyCacheArray = Array.Empty <JsonPropertyInfo>();
}
break;
default:
Debug.Fail($"Unexpected class type: {ClassType}");
break;
}
}
private static bool TryParseValue(ref Utf8JsonReader reader, [NotNullWhen(true)] out JsonDocument?document, bool shouldThrow)
{
JsonReaderState state = reader.CurrentState;
CheckSupportedOptions(state.Options, nameof(reader));
// Value copy to overwrite the ref on an exception and undo the destructive reads.
Utf8JsonReader restore = reader;
ReadOnlySpan <byte> valueSpan = default;
ReadOnlySequence <byte> valueSequence = default;
try
{
switch (reader.TokenType)
{
// A new reader was created and has never been read,
// so we need to move to the first token.
// (or a reader has terminated and we're about to throw)
case JsonTokenType.None:
// Using a reader loop the caller has identified a property they wish to
// hydrate into a JsonDocument. Move to the value first.
case JsonTokenType.PropertyName:
{
if (!reader.Read())
{
if (shouldThrow)
{
ThrowHelper.ThrowJsonReaderException(
ref reader,
ExceptionResource.ExpectedJsonTokens);
}
reader = restore;
document = null;
return(false);
}
break;
}
}
switch (reader.TokenType)
{
// Any of the "value start" states are acceptable.
case JsonTokenType.StartObject:
case JsonTokenType.StartArray:
{
long startingOffset = reader.TokenStartIndex;
if (!reader.TrySkip())
{
if (shouldThrow)
{
ThrowHelper.ThrowJsonReaderException(
ref reader,
ExceptionResource.ExpectedJsonTokens);
}
reader = restore;
document = null;
return(false);
}
long totalLength = reader.BytesConsumed - startingOffset;
ReadOnlySequence <byte> sequence = reader.OriginalSequence;
if (sequence.IsEmpty)
{
valueSpan = reader.OriginalSpan.Slice(
checked ((int)startingOffset),
checked ((int)totalLength));
}
else
{
valueSequence = sequence.Slice(startingOffset, totalLength);
}
Debug.Assert(
reader.TokenType == JsonTokenType.EndObject ||
reader.TokenType == JsonTokenType.EndArray);
break;
}
// Single-token values
case JsonTokenType.Number:
case JsonTokenType.True:
case JsonTokenType.False:
case JsonTokenType.Null:
{
if (reader.HasValueSequence)
{
valueSequence = reader.ValueSequence;
}
else
{
valueSpan = reader.ValueSpan;
}
break;
}
// String's ValueSequence/ValueSpan omits the quotes, we need them back.
case JsonTokenType.String:
{
ReadOnlySequence <byte> sequence = reader.OriginalSequence;
if (sequence.IsEmpty)
{
// Since the quoted string fit in a ReadOnlySpan originally
// the contents length plus the two quotes can't overflow.
int payloadLength = reader.ValueSpan.Length + 2;
Debug.Assert(payloadLength > 1);
ReadOnlySpan <byte> readerSpan = reader.OriginalSpan;
Debug.Assert(
readerSpan[(int)reader.TokenStartIndex] == (byte)'"',
$"Calculated span starts with {readerSpan[(int)reader.TokenStartIndex]}");
Debug.Assert(
readerSpan[(int)reader.TokenStartIndex + payloadLength - 1] == (byte)'"',
$"Calculated span ends with {readerSpan[(int)reader.TokenStartIndex + payloadLength - 1]}");
valueSpan = readerSpan.Slice((int)reader.TokenStartIndex, payloadLength);
}
else
{
long payloadLength = 2;
if (reader.HasValueSequence)
{
payloadLength += reader.ValueSequence.Length;
}
else
{
payloadLength += reader.ValueSpan.Length;
}
valueSequence = sequence.Slice(reader.TokenStartIndex, payloadLength);
Debug.Assert(
valueSequence.First.Span[0] == (byte)'"',
$"Calculated sequence starts with {valueSequence.First.Span[0]}");
Debug.Assert(
valueSequence.ToArray()[payloadLength - 1] == (byte)'"',
$"Calculated sequence ends with {valueSequence.ToArray()[payloadLength - 1]}");
}
break;
}
default:
{
if (shouldThrow)
{
// Default case would only hit if TokenType equals JsonTokenType.EndObject or JsonTokenType.EndArray in which case it would never be sequence
Debug.Assert(!reader.HasValueSequence);
byte displayByte = reader.ValueSpan[0];
ThrowHelper.ThrowJsonReaderException(
ref reader,
ExceptionResource.ExpectedStartOfValueNotFound,
displayByte);
}
reader = restore;
document = null;
return(false);
}
}
}
catch
{
reader = restore;
throw;
}
int length = valueSpan.IsEmpty ? checked ((int)valueSequence.Length) : valueSpan.Length;
byte[] rented = ArrayPool <byte> .Shared.Rent(length);
Span <byte> rentedSpan = rented.AsSpan(0, length);
try
{
if (valueSpan.IsEmpty)
{
valueSequence.CopyTo(rentedSpan);
}
else
{
valueSpan.CopyTo(rentedSpan);
}
document = Parse(rented.AsMemory(0, length), state.Options, rented);
return(true);
}
catch
{
// This really shouldn't happen since the document was already checked
// for consistency by Skip. But if data mutations happened just after
// the calls to Read then the copy may not be valid.
rentedSpan.Clear();
ArrayPool <byte> .Shared.Return(rented);
throw;
}
}
private void DetermineSerializationCapabilities()
{
if (ClassType != ClassType.Enumerable &&
ClassType != ClassType.Dictionary &&
ClassType != ClassType.IDictionaryConstructible)
{
// We serialize if there is a getter + not ignoring readonly properties.
ShouldSerialize = HasGetter && (HasSetter || !Options.IgnoreReadOnlyProperties);
// We deserialize if there is a setter.
ShouldDeserialize = HasSetter;
}
else
{
if (HasGetter)
{
ShouldSerialize = true;
if (HasSetter)
{
ShouldDeserialize = true;
if (RuntimePropertyType.IsArray)
{
// Verify that we don't have a multidimensional array.
if (RuntimePropertyType.GetArrayRank() > 1)
{
throw ThrowHelper.GetNotSupportedException_SerializationNotSupportedCollection(RuntimePropertyType, ParentClassType, PropertyInfo);
}
EnumerableConverter = s_jsonArrayConverter;
}
else if (ClassType == ClassType.IDictionaryConstructible)
{
// Natively supported type.
if (DeclaredPropertyType == ImplementedPropertyType)
{
if (RuntimePropertyType.FullName.StartsWith(JsonClassInfo.ImmutableNamespaceName))
{
DefaultImmutableDictionaryConverter.RegisterImmutableDictionary(
RuntimePropertyType, JsonClassInfo.GetElementType(RuntimePropertyType, ParentClassType, PropertyInfo, Options), Options);
DictionaryConverter = s_jsonImmutableDictionaryConverter;
}
else if (JsonClassInfo.IsDeserializedByConstructingWithIDictionary(RuntimePropertyType))
{
DictionaryConverter = s_jsonIDictionaryConverter;
}
}
// Type that implements a type with ClassType IDictionaryConstructible.
else
{
DictionaryConverter = s_jsonDerivedDictionaryConverter;
}
}
else if (ClassType == ClassType.Enumerable)
{
// Else if it's an implementing type whose runtime type is not assignable to IList.
if (DeclaredPropertyType != ImplementedPropertyType &&
(!typeof(IList).IsAssignableFrom(RuntimePropertyType) ||
ImplementedPropertyType == typeof(ArrayList) ||
ImplementedPropertyType == typeof(IList)))
{
EnumerableConverter = s_jsonDerivedEnumerableConverter;
}
else if (JsonClassInfo.IsDeserializedByConstructingWithIList(RuntimePropertyType) ||
(!typeof(IList).IsAssignableFrom(RuntimePropertyType) &&
JsonClassInfo.HasConstructorThatTakesGenericIEnumerable(RuntimePropertyType, Options)))
{
EnumerableConverter = s_jsonICollectionConverter;
}
else if (RuntimePropertyType.IsGenericType &&
RuntimePropertyType.FullName.StartsWith(JsonClassInfo.ImmutableNamespaceName) &&
RuntimePropertyType.GetGenericArguments().Length == 1)
{
DefaultImmutableEnumerableConverter.RegisterImmutableCollection(RuntimePropertyType,
JsonClassInfo.GetElementType(RuntimePropertyType, ParentClassType, PropertyInfo, Options), Options);
EnumerableConverter = s_jsonImmutableEnumerableConverter;
}
}
}
}
}
}
private void WriteStart(byte token)
{
if (CurrentDepth >= JsonConstants.MaxWriterDepth)
{
ThrowHelper.ThrowInvalidOperationException(ExceptionResource.DepthTooLarge, _currentDepth, token: default, tokenType: default);
private static void HandleStartArray(
JsonSerializerOptions options,
ref Utf8JsonReader reader,
ref ReadStack state)
{
JsonPropertyInfo jsonPropertyInfo = state.Current.JsonPropertyInfo;
if (state.Current.SkipProperty)
{
// The array is not being applied to the object.
state.Push();
state.Current.Drain = true;
return;
}
if (jsonPropertyInfo == null)
{
jsonPropertyInfo = state.Current.JsonClassInfo.CreateRootObject(options);
}
else if (state.Current.JsonClassInfo.ClassType == ClassType.Unknown)
{
jsonPropertyInfo = state.Current.JsonClassInfo.CreatePolymorphicProperty(jsonPropertyInfo, typeof(object), options);
}
// Verify that we don't have a multidimensional array.
Type arrayType = jsonPropertyInfo.RuntimePropertyType;
if (!typeof(IEnumerable).IsAssignableFrom(arrayType) || (arrayType.IsArray && arrayType.GetArrayRank() > 1))
{
ThrowHelper.ThrowJsonException_DeserializeUnableToConvertValue(arrayType, reader, state.JsonPath);
}
Debug.Assert(state.Current.IsProcessingEnumerableOrDictionary);
if (state.Current.PropertyInitialized)
{
// A nested json array so push a new stack frame.
Type elementType = jsonPropertyInfo.ElementClassInfo.Type;
state.Push();
state.Current.Initialize(elementType, options);
state.Current.PropertyInitialized = true;
}
else
{
state.Current.PropertyInitialized = true;
}
jsonPropertyInfo = state.Current.JsonPropertyInfo;
if (state.Current.JsonClassInfo.ClassType == ClassType.Value)
{
state.Current.JsonPropertyInfo.Read(JsonTokenType.StartObject, ref state, ref reader);
}
else
{
// If current property is already set (from a constructor, for example) leave as-is.
if (jsonPropertyInfo.GetValueAsObject(state.Current.ReturnValue) == null)
{
// Create the enumerable.
object value = ReadStackFrame.CreateEnumerableValue(ref reader, ref state, options);
// If value is not null, then we don't have a converter so apply the value.
if (value != null)
{
if (state.Current.ReturnValue != null)
{
state.Current.JsonPropertyInfo.SetValueAsObject(state.Current.ReturnValue, value);
}
else
{
// Primitive arrays being returned without object
state.Current.SetReturnValue(value);
}
}
}
}
}