csharp-sdk-upm/Libs/Newtonsoft.Json.AOT/Linq/JObject.Async.cs

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2021-03-31 11:22:02 +08:00
#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion
#if HAVE_ASYNC
using System;
using System.Globalization;
using System.Threading;
using System.Threading.Tasks;
using LC.Newtonsoft.Json.Utilities;
namespace LC.Newtonsoft.Json.Linq
{
public partial class JObject
{
/// <summary>
/// Writes this token to a <see cref="JsonWriter"/> asynchronously.
/// </summary>
/// <param name="writer">A <see cref="JsonWriter"/> into which this method will write.</param>
/// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
/// <param name="converters">A collection of <see cref="JsonConverter"/> which will be used when writing the token.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous write operation.</returns>
public override Task WriteToAsync(JsonWriter writer, CancellationToken cancellationToken, params JsonConverter[] converters)
{
Task t = writer.WriteStartObjectAsync(cancellationToken);
if (!t.IsCompletedSucessfully())
{
return AwaitProperties(t, 0, writer, cancellationToken, converters);
}
for (int i = 0; i < _properties.Count; i++)
{
t = _properties[i].WriteToAsync(writer, cancellationToken, converters);
if (!t.IsCompletedSucessfully())
{
return AwaitProperties(t, i + 1, writer, cancellationToken, converters);
}
}
return writer.WriteEndObjectAsync(cancellationToken);
// Local functions, params renamed (capitalized) so as not to capture and allocate when calling async
async Task AwaitProperties(Task task, int i, JsonWriter Writer, CancellationToken CancellationToken, JsonConverter[] Converters)
{
await task.ConfigureAwait(false);
for (; i < _properties.Count; i++)
{
await _properties[i].WriteToAsync(Writer, CancellationToken, Converters).ConfigureAwait(false);
}
await Writer.WriteEndObjectAsync(CancellationToken).ConfigureAwait(false);
}
}
/// <summary>
/// Asynchronously loads a <see cref="JObject"/> from a <see cref="JsonReader"/>.
/// </summary>
/// <param name="reader">A <see cref="JsonReader"/> that will be read for the content of the <see cref="JObject"/>.</param>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>
/// A <see cref="Task{TResult}"/> that represents the asynchronous load. The <see cref="Task{TResult}.Result"/>
/// property returns a <see cref="JObject"/> that contains the JSON that was read from the specified <see cref="JsonReader"/>.</returns>
public new static Task<JObject> LoadAsync(JsonReader reader, CancellationToken cancellationToken = default)
{
return LoadAsync(reader, null, cancellationToken);
}
/// <summary>
/// Asynchronously loads a <see cref="JObject"/> from a <see cref="JsonReader"/>.
/// </summary>
/// <param name="reader">A <see cref="JsonReader"/> that will be read for the content of the <see cref="JObject"/>.</param>
/// <param name="settings">The <see cref="JsonLoadSettings"/> used to load the JSON.
/// If this is <c>null</c>, default load settings will be used.</param>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>
/// A <see cref="Task{TResult}"/> that represents the asynchronous load. The <see cref="Task{TResult}.Result"/>
/// property returns a <see cref="JObject"/> that contains the JSON that was read from the specified <see cref="JsonReader"/>.</returns>
public new static async Task<JObject> LoadAsync(JsonReader reader, JsonLoadSettings? settings, CancellationToken cancellationToken = default)
{
ValidationUtils.ArgumentNotNull(reader, nameof(reader));
if (reader.TokenType == JsonToken.None)
{
if (!await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
{
throw JsonReaderException.Create(reader, "Error reading JObject from JsonReader.");
}
}
await reader.MoveToContentAsync(cancellationToken).ConfigureAwait(false);
if (reader.TokenType != JsonToken.StartObject)
{
throw JsonReaderException.Create(reader, "Error reading JObject from JsonReader. Current JsonReader item is not an object: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));
}
JObject o = new JObject();
o.SetLineInfo(reader as IJsonLineInfo, settings);
await o.ReadTokenFromAsync(reader, settings, cancellationToken).ConfigureAwait(false);
return o;
}
}
}
#endif