// 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 Deserialize method.
// 2) The object is a property on a parent object.
// 3) The object is an element in an enumerable.
private static bool WriteCore(
Utf8JsonWriter writer,
object?value,
JsonSerializerOptions options,
ref WriteStack state,
JsonConverter jsonConverter)
{
try
{
return(jsonConverter.TryWriteAsObject(writer, value, options, ref state));
}
catch (InvalidOperationException ex) when(ex.Source == ThrowHelper.ExceptionSourceValueToRethrowAsJsonException)
{
ThrowHelper.ReThrowWithPath(state, ex);
throw;
}
catch (JsonException ex)
{
ThrowHelper.AddExceptionInformation(state, ex);
throw;
}
}
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 (options.ReferenceHandling.ShouldReadPreservedReferences())
{
CheckValidTokenAfterMetadataValues(ref readStack, 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.ReferenceId != null)
{
Debug.Assert(options.ReferenceHandling.ShouldReadPreservedReferences());
HandleReference(ref readStack);
}
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;
}
// 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 flushThreshold,
JsonSerializerOptions options,
ref WriteStack state)
{
bool finishedSerializing;
int currentDepth = writer.CurrentDepth;
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 == currentDepth)
{
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 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(tokenType))
{
if (!HandleObjectAsValue(tokenType, options, ref reader, ref readStack, ref initialState, initialBytesConsumed))
{
// Need more data
break;
}
}
else if (readStack.Current.IsProcessingDictionary || readStack.Current.IsProcessingIDictionaryConstructible)
{
HandleStartDictionary(options, ref reader, ref readStack);
}
else
{
HandleStartObject(options, ref reader, ref readStack);
}
}
else if (tokenType == JsonTokenType.EndObject)
{
if (readStack.Current.Drain)
{
readStack.Pop();
}
else if (readStack.Current.IsProcessingDictionary || readStack.Current.IsProcessingIDictionaryConstructible)
{
HandleEndDictionary(options, ref reader, ref readStack);
}
else
{
HandleEndObject(options, ref reader, ref readStack);
}
}
else if (tokenType == JsonTokenType.StartArray)
{
if (!readStack.Current.IsProcessingValue(tokenType))
{
HandleStartArray(options, ref reader, 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 reader, ref readStack);
}
else if (tokenType == JsonTokenType.Null)
{
HandleNull(ref reader, ref readStack, options);
}
}
}
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;
return;
}
private static void ReadCore(
JsonSerializerOptions options,
ref Utf8JsonReader reader,
ref ReadStack state)
{
try
{
JsonPropertyInfo jsonPropertyInfo = state.Current.JsonClassInfo !.PolicyProperty !;
JsonConverter converter = jsonPropertyInfo.ConverterBase;
if (!state.IsContinuation)
{
if (!JsonConverter.SingleValueReadWithReadAhead(converter.ClassType, ref reader, ref state))
{
// Read more data until we have the full element.
state.BytesConsumed += reader.BytesConsumed;
return;
}
}
else
{
// For a continuation, read ahead here to avoid having to build and then tear
// down the call stack if there is more than one buffer fetch necessary.
if (!JsonConverter.SingleValueReadWithReadAhead(ClassType.Value, ref reader, ref state))
{
state.BytesConsumed += reader.BytesConsumed;
return;
}
}
bool success = converter.TryReadAsObject(ref reader, jsonPropertyInfo.RuntimePropertyType !, options, ref state, out object?value);
if (success)
{
state.Current.ReturnValue = value;
// Read any trailing whitespace.
// If additional whitespace exists after this read, the subsequent call to reader.Read() will throw.
reader.Read();
}
state.BytesConsumed += reader.BytesConsumed;
}
catch (JsonReaderException ex)
{
// Re-throw with Path information.
ThrowHelper.ReThrowWithPath(state, ex);
}
catch (FormatException ex) when(ex.Source == ThrowHelper.ExceptionSourceValueToRethrowAsJsonException)
{
ThrowHelper.ReThrowWithPath(state, reader, ex);
}
catch (InvalidOperationException ex) when(ex.Source == ThrowHelper.ExceptionSourceValueToRethrowAsJsonException)
{
ThrowHelper.ReThrowWithPath(state, reader, ex);
}
catch (JsonException ex)
{
ThrowHelper.AddExceptionInformation(state, reader, ex);
throw;
}
}
// 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 Deserialize method.
// 2) The object is a 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
{
switch (state.Current.JsonClassInfo.ClassType)
{
case ClassType.Enumerable:
finishedSerializing = HandleEnumerable(state.Current.JsonClassInfo.ElementClassInfo, options, writer, ref state);
break;
case ClassType.Value:
Debug.Assert(state.Current.JsonPropertyInfo.ClassType == ClassType.Value);
state.Current.JsonPropertyInfo.Write(ref state, writer);
finishedSerializing = true;
break;
case ClassType.Dictionary:
finishedSerializing = HandleDictionary(state.Current.JsonClassInfo.ElementClassInfo, options, writer, ref state);
break;
default:
Debug.Assert(state.Current.JsonClassInfo.ClassType == ClassType.Object ||
state.Current.JsonClassInfo.ClassType == ClassType.Unknown);
finishedSerializing = WriteObject(options, writer, ref state);
break;
}
if (finishedSerializing)
{
if (writer.CurrentDepth == originalWriterDepth)
{
break;
}
}
else if (writer.CurrentDepth >= options.EffectiveMaxDepth)
{
ThrowHelper.ThrowInvalidOperationException_SerializerCycleDetected(options.MaxDepth);
}
// If serialization is not finished and we surpass flush threshold then return false which will 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);
}
