namespace System.Text.Json.Serialization.Converters { internal abstract class ObjectConverter : JsonConverter<object> { private protected override ConverterStrategy GetDefaultConverterStrategy() { return ConverterStrategy.Object; } public ObjectConverter() { base.CanBePolymorphic = true; } public sealed override object ReadAsPropertyName(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { ThrowHelper.ThrowNotSupportedException_DictionaryKeyTypeNotSupported(Type, this); return null; } internal sealed override object ReadAsPropertyNameCore(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { ThrowHelper.ThrowNotSupportedException_DictionaryKeyTypeNotSupported(Type, this); return null; } public sealed override void Write(Utf8JsonWriter writer, object value, JsonSerializerOptions options) { if (value == null) writer.WriteNullValue(); else { writer.WriteStartObject(); writer.WriteEndObject(); } } public sealed override void WriteAsPropertyName(Utf8JsonWriter writer, object value, JsonSerializerOptions options) { WriteAsPropertyNameCore(writer, value, options, false); } internal sealed override void WriteAsPropertyNameCore(Utf8JsonWriter writer, object value, JsonSerializerOptions options, bool isWritingExtensionDataProperty) { if (value == null) ThrowHelper.ThrowArgumentNullException("value"); Type type = value.GetType(); if (type == Type) ThrowHelper.ThrowNotSupportedException_DictionaryKeyTypeNotSupported(type, this); JsonConverter converterInternal = options.GetConverterInternal(type); converterInternal.WriteAsPropertyNameCoreAsObject(writer, value, options, isWritingExtensionDataProperty); } } }