public override TMessage?Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
var message = new TMessage();
JsonConverterHelper.PopulateList(ref reader, options, message, message.Descriptor.Fields[ListValue.ValuesFieldNumber]);
return(message);
}
public override TMessage?Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
var message = new TMessage();
var valueDescriptor = message.Descriptor.Fields[JsonConverterHelper.WrapperValueFieldNumber];
var t = JsonConverterHelper.GetFieldType(valueDescriptor);
var value = JsonSerializer.Deserialize(ref reader, t, options);
valueDescriptor.Accessor.SetValue(message, value);
return(message);
}
public override TMessage Read(
ref Utf8JsonReader reader,
Type typeToConvert,
JsonSerializerOptions options)
{
var message = new TMessage();
if (reader.TokenType != JsonTokenType.StartObject)
{
throw new InvalidOperationException($"Unexpected JSON token: {reader.TokenType}");
}
while (reader.Read())
{
switch (reader.TokenType)
{
case JsonTokenType.EndObject:
return(message);
case JsonTokenType.PropertyName:
if (_jsonFieldMap.TryGetValue(reader.GetString() !, out var fieldDescriptor))
{
if (fieldDescriptor.ContainingOneof != null)
{
if (fieldDescriptor.ContainingOneof.Accessor.GetCaseFieldDescriptor(message) != null)
{
throw new InvalidOperationException($"Multiple values specified for oneof {fieldDescriptor.ContainingOneof.Name}");
}
}
if (fieldDescriptor.IsMap)
{
JsonConverterHelper.PopulateMap(ref reader, options, message, fieldDescriptor);
}
else if (fieldDescriptor.IsRepeated)
{
JsonConverterHelper.PopulateList(ref reader, options, message, fieldDescriptor);
}
else
{
var fieldType = JsonConverterHelper.GetFieldType(fieldDescriptor);
var propertyValue = JsonSerializer.Deserialize(ref reader, fieldType, options);
fieldDescriptor.Accessor.SetValue(message, propertyValue);
}
}
else
{
reader.Skip();
}
break;
public override JsonConverter CreateConverter(
Type typeToConvert, JsonSerializerOptions options)
{
var descriptor = JsonConverterHelper.GetMessageDescriptor(typeToConvert) !;
var converterType = WellKnownTypeNames[descriptor.FullName];
var converter = (JsonConverter)Activator.CreateInstance(
converterType.MakeGenericType(new Type[] { typeToConvert }),
BindingFlags.Instance | BindingFlags.Public,
binder: null,
args: new object[] { _settings },
culture: null) !;
return(converter);
}
public override bool CanConvert(Type typeToConvert)
{
if (!typeof(IMessage).IsAssignableFrom(typeToConvert))
{
return(false);
}
var descriptor = JsonConverterHelper.GetMessageDescriptor(typeToConvert);
if (descriptor == null)
{
return(false);
}
return(JsonConverterHelper.IsWrapperType(descriptor));
}
public override bool CanConvert(Type typeToConvert)
{
if (!typeof(IMessage).IsAssignableFrom(typeToConvert))
{
return(false);
}
var descriptor = JsonConverterHelper.GetMessageDescriptor(typeToConvert);
if (descriptor == null)
{
return(false);
}
return(WellKnownTypeNames.ContainsKey(descriptor.FullName));
}
private static EnumDescriptor?ResolveEnumDescriptor(Type typeToConvert)
{
var containingType = typeToConvert?.DeclaringType?.DeclaringType;
if (containingType != null)
{
var messageDescriptor = JsonConverterHelper.GetMessageDescriptor(containingType);
if (messageDescriptor != null)
{
for (var i = 0; i < messageDescriptor.EnumTypes.Count; i++)
{
if (messageDescriptor.EnumTypes[i].ClrType == typeToConvert)
{
return(messageDescriptor.EnumTypes[i]);
}
}
}
}
return(null);
}
public override TMessage?Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
using var d = JsonDocument.ParseValue(ref reader);
if (!d.RootElement.TryGetProperty(AnyTypeUrlField, out var urlField))
{
throw new InvalidOperationException("Any message with no @type");
}
var message = new TMessage();
var typeUrl = urlField.GetString();
var typeName = Any.GetTypeName(typeUrl);
var descriptor = _settings.TypeRegistry.Find(typeName);
if (descriptor == null)
{
throw new InvalidOperationException($"Type registry has no descriptor for type name '{typeName}'");
}
IMessage data;
if (JsonConverterHelper.IsWellKnownType(descriptor))
{
if (!d.RootElement.TryGetProperty(AnyWellKnownTypeValueField, out var valueField))
{
throw new InvalidOperationException($"Expected '{AnyWellKnownTypeValueField}' property for well-known type Any body");
}
data = (IMessage)JsonSerializer.Deserialize(valueField, descriptor.ClrType, options) !;
}
else
{
data = (IMessage)JsonSerializer.Deserialize(d.RootElement, descriptor.ClrType, options) !;
}
message.Descriptor.Fields[Any.TypeUrlFieldNumber].Accessor.SetValue(message, typeUrl);
message.Descriptor.Fields[Any.ValueFieldNumber].Accessor.SetValue(message, data.ToByteString());
return(message);
}
public override void Write(Utf8JsonWriter writer, TMessage value, JsonSerializerOptions options)
{
var typeUrl = (string)value.Descriptor.Fields[Any.TypeUrlFieldNumber].Accessor.GetValue(value);
var data = (ByteString)value.Descriptor.Fields[Any.ValueFieldNumber].Accessor.GetValue(value);
var typeName = Any.GetTypeName(typeUrl);
var descriptor = _settings.TypeRegistry.Find(typeName);
if (descriptor == null)
{
throw new InvalidOperationException($"Type registry has no descriptor for type name '{typeName}'");
}
var valueMessage = descriptor.Parser.ParseFrom(data);
writer.WriteStartObject();
writer.WriteString(AnyTypeUrlField, typeUrl);
if (JsonConverterHelper.IsWellKnownType(descriptor))
{
writer.WritePropertyName(AnyWellKnownTypeValueField);
if (JsonConverterHelper.IsWrapperType(descriptor))
{
var wrappedValue = valueMessage.Descriptor.Fields[JsonConverterHelper.WrapperValueFieldNumber].Accessor.GetValue(valueMessage);
JsonSerializer.Serialize(writer, wrappedValue, wrappedValue.GetType(), options);
}
else
{
JsonSerializer.Serialize(writer, valueMessage, valueMessage.GetType(), options);
}
}
else
{
MessageConverter <Any> .WriteMessageFields(writer, valueMessage, _settings, options);
}
writer.WriteEndObject();
}