#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 Newtonsoft.Json.Utilities; namespace Newtonsoft.Json.Linq { internal 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(CancellationToken)) { 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(CancellationToken)) { 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