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MessageConverter.cs
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MessageConverter.cs
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// Copyright (c) .NET Foundation and contributors. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
using System;
using System.Text.Json;
namespace Microsoft.DotNet.Interactive.Jupyter.Messaging;
internal class MessageConverter : JsonConverter<Message>
{
public override Message Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
EnsureStartObject(reader, typeToConvert);
_ = JsonDocument.TryParseValue(ref reader, out JsonDocument doc);
JsonElement root = doc.RootElement;
_ = root.TryGetProperty("header", out JsonElement headerElement);
_ = root.TryGetProperty("parent_header", out JsonElement parentHeaderElement);
_ = root.TryGetProperty("metadata", out JsonElement metadataElement);
_ = root.TryGetProperty("content", out JsonElement contentElement);
return MessageExtensions.DeserializeMessage(
signature: null,
headerJson: headerElement.GetRawText(),
parentHeaderJson: parentHeaderElement.GetRawText(),
metadataJson: metadataElement.GetRawText(),
contentJson: contentElement.GetRawText(),
identifiers: null,
options);
}
public override void Write(Utf8JsonWriter writer, Message value, JsonSerializerOptions options)
{
writer.WriteStartObject();
Write(writer, value.Header, "header", options);
Write(writer, value.ParentHeader ?? new object(), "parent_header", options);
Write(writer, value.MetaData ?? new object(), "metadata", options);
Write(writer, value.Content, "content", options);
Write(writer, value.Buffers, "buffers", options);
Write(writer, value.Channel, "channel", options);
writer.WriteEndObject();
}
private void Write<T>(Utf8JsonWriter writer, T value, string propertyName, JsonSerializerOptions options)
{
var localOptions = new JsonSerializerOptions(options);
localOptions.Converters.Remove(this);
writer.WritePropertyName(options.PropertyNamingPolicy?.ConvertName(propertyName) ?? propertyName);
JsonSerializer.Serialize(writer, value, value.GetType(), localOptions);
}
}