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JsonWriter.Async.cs
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JsonWriter.Async.cs
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#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;
#if HAVE_BIG_INTEGER
using System.Numerics;
#endif
using System.Threading.Tasks;
using Newtonsoft.Json.Utilities;
namespace Newtonsoft.Json
{
public abstract partial class JsonWriter
{
internal Task AutoCompleteAsync(JsonToken tokenBeingWritten, CancellationToken cancellationToken)
{
State oldState = _currentState;
// gets new state based on the current state and what is being written
State newState = StateArray[(int)tokenBeingWritten][(int)oldState];
if (newState == State.Error)
{
throw JsonWriterException.Create(this, "Token {0} in state {1} would result in an invalid JSON object.".FormatWith(CultureInfo.InvariantCulture, tokenBeingWritten.ToString(), oldState.ToString()), null);
}
_currentState = newState;
if (_formatting == Formatting.Indented)
{
switch (oldState)
{
case State.Start:
break;
case State.Property:
return WriteIndentSpaceAsync(cancellationToken);
case State.ArrayStart:
case State.ConstructorStart:
return WriteIndentAsync(cancellationToken);
case State.Array:
case State.Constructor:
return tokenBeingWritten == JsonToken.Comment ? WriteIndentAsync(cancellationToken) : AutoCompleteAsync(cancellationToken);
case State.Object:
switch (tokenBeingWritten)
{
case JsonToken.Comment:
break;
case JsonToken.PropertyName:
return AutoCompleteAsync(cancellationToken);
default:
return WriteValueDelimiterAsync(cancellationToken);
}
break;
default:
if (tokenBeingWritten == JsonToken.PropertyName)
{
return WriteIndentAsync(cancellationToken);
}
break;
}
}
else if (tokenBeingWritten != JsonToken.Comment)
{
switch (oldState)
{
case State.Object:
case State.Array:
case State.Constructor:
return WriteValueDelimiterAsync(cancellationToken);
}
}
return AsyncUtils.CompletedTask;
}
private async Task AutoCompleteAsync(CancellationToken cancellationToken)
{
await WriteValueDelimiterAsync(cancellationToken).ConfigureAwait(false);
await WriteIndentAsync(cancellationToken).ConfigureAwait(false);
}
/// <summary>
/// Asynchronously closes this writer.
/// If <see cref="JsonWriter.CloseOutput"/> is set to <c>true</c>, the destination is also closed.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task CloseAsync(CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
Close();
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously flushes whatever is in the buffer to the destination and also flushes the destination.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task FlushAsync(CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
Flush();
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes the specified end token.
/// </summary>
/// <param name="token">The end token to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
protected virtual Task WriteEndAsync(JsonToken token, CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteEnd(token);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes indent characters.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
protected virtual Task WriteIndentAsync(CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteIndent();
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes the JSON value delimiter.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
protected virtual Task WriteValueDelimiterAsync(CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteValueDelimiter();
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes an indent space.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
protected virtual Task WriteIndentSpaceAsync(CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteIndentSpace();
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes raw JSON without changing the writer's state.
/// </summary>
/// <param name="json">The raw JSON to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteRawAsync(string? json, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteRaw(json);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes the end of the current JSON object or array.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteEndAsync(CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteEnd();
return AsyncUtils.CompletedTask;
}
internal Task WriteEndInternalAsync(CancellationToken cancellationToken)
{
JsonContainerType type = Peek();
switch (type)
{
case JsonContainerType.Object:
return WriteEndObjectAsync(cancellationToken);
case JsonContainerType.Array:
return WriteEndArrayAsync(cancellationToken);
case JsonContainerType.Constructor:
return WriteEndConstructorAsync(cancellationToken);
default:
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
throw JsonWriterException.Create(this, "Unexpected type when writing end: " + type, null);
}
}
internal Task InternalWriteEndAsync(JsonContainerType type, CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
int levelsToComplete = CalculateLevelsToComplete(type);
while (levelsToComplete-- > 0)
{
JsonToken token = GetCloseTokenForType(Pop());
Task t;
if (_currentState == State.Property)
{
t = WriteNullAsync(cancellationToken);
if (!t.IsCompletedSucessfully())
{
return AwaitProperty(t, levelsToComplete, token, cancellationToken);
}
}
if (_formatting == Formatting.Indented)
{
if (_currentState != State.ObjectStart && _currentState != State.ArrayStart)
{
t = WriteIndentAsync(cancellationToken);
if (!t.IsCompletedSucessfully())
{
return AwaitIndent(t, levelsToComplete, token, cancellationToken);
}
}
}
t = WriteEndAsync(token, cancellationToken);
if (!t.IsCompletedSucessfully())
{
return AwaitEnd(t, levelsToComplete, cancellationToken);
}
UpdateCurrentState();
}
return AsyncUtils.CompletedTask;
// Local functions, params renamed (capitalized) so as not to capture and allocate when calling async
async Task AwaitProperty(Task task, int LevelsToComplete, JsonToken token, CancellationToken CancellationToken)
{
await task.ConfigureAwait(false);
// Finish current loop
if (_formatting == Formatting.Indented)
{
if (_currentState != State.ObjectStart && _currentState != State.ArrayStart)
{
await WriteIndentAsync(CancellationToken).ConfigureAwait(false);
}
}
await WriteEndAsync(token, CancellationToken).ConfigureAwait(false);
UpdateCurrentState();
await AwaitRemaining(LevelsToComplete, CancellationToken).ConfigureAwait(false);
}
async Task AwaitIndent(Task task, int LevelsToComplete, JsonToken token, CancellationToken CancellationToken)
{
await task.ConfigureAwait(false);
// Finish current loop
await WriteEndAsync(token, CancellationToken).ConfigureAwait(false);
UpdateCurrentState();
await AwaitRemaining(LevelsToComplete, CancellationToken).ConfigureAwait(false);
}
async Task AwaitEnd(Task task, int LevelsToComplete, CancellationToken CancellationToken)
{
await task.ConfigureAwait(false);
// Finish current loop
UpdateCurrentState();
await AwaitRemaining(LevelsToComplete, CancellationToken).ConfigureAwait(false);
}
async Task AwaitRemaining(int LevelsToComplete, CancellationToken CancellationToken)
{
while (LevelsToComplete-- > 0)
{
JsonToken token = GetCloseTokenForType(Pop());
if (_currentState == State.Property)
{
await WriteNullAsync(CancellationToken).ConfigureAwait(false);
}
if (_formatting == Formatting.Indented)
{
if (_currentState != State.ObjectStart && _currentState != State.ArrayStart)
{
await WriteIndentAsync(CancellationToken).ConfigureAwait(false);
}
}
await WriteEndAsync(token, CancellationToken).ConfigureAwait(false);
UpdateCurrentState();
}
}
}
/// <summary>
/// Asynchronously writes the end of an array.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteEndArrayAsync(CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteEndArray();
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes the end of a constructor.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteEndConstructorAsync(CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteEndConstructor();
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes the end of a JSON object.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteEndObjectAsync(CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteEndObject();
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes a null value.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteNullAsync(CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteNull();
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes the property name of a name/value pair of a JSON object.
/// </summary>
/// <param name="name">The name of the property.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WritePropertyNameAsync(string name, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WritePropertyName(name);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes the property name of a name/value pair of a JSON object.
/// </summary>
/// <param name="name">The name of the property.</param>
/// <param name="escape">A flag to indicate whether the text should be escaped when it is written as a JSON property name.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WritePropertyNameAsync(string name, bool escape, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WritePropertyName(name, escape);
return AsyncUtils.CompletedTask;
}
internal Task InternalWritePropertyNameAsync(string name, CancellationToken cancellationToken)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
_currentPosition.PropertyName = name;
return AutoCompleteAsync(JsonToken.PropertyName, cancellationToken);
}
/// <summary>
/// Asynchronously writes the beginning of a JSON array.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteStartArrayAsync(CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteStartArray();
return AsyncUtils.CompletedTask;
}
internal async Task InternalWriteStartAsync(JsonToken token, JsonContainerType container, CancellationToken cancellationToken)
{
UpdateScopeWithFinishedValue();
await AutoCompleteAsync(token, cancellationToken).ConfigureAwait(false);
Push(container);
}
/// <summary>
/// Asynchronously writes a comment <c>/*...*/</c> containing the specified text.
/// </summary>
/// <param name="text">Text to place inside the comment.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteCommentAsync(string? text, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteComment(text);
return AsyncUtils.CompletedTask;
}
internal Task InternalWriteCommentAsync(CancellationToken cancellationToken)
{
return AutoCompleteAsync(JsonToken.Comment, cancellationToken);
}
/// <summary>
/// Asynchronously writes raw JSON where a value is expected and updates the writer's state.
/// </summary>
/// <param name="json">The raw JSON to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteRawValueAsync(string? json, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteRawValue(json);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes the start of a constructor with the given name.
/// </summary>
/// <param name="name">The name of the constructor.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteStartConstructorAsync(string name, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteStartConstructor(name);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes the beginning of a JSON object.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
/// <returns>A <see cref="Task"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteStartObjectAsync(CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteStartObject();
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes the current <see cref="JsonReader"/> token.
/// </summary>
/// <param name="reader">The <see cref="JsonReader"/> to read the token from.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public Task WriteTokenAsync(JsonReader reader, CancellationToken cancellationToken = default)
{
return WriteTokenAsync(reader, true, cancellationToken);
}
/// <summary>
/// Asynchronously writes the current <see cref="JsonReader"/> token.
/// </summary>
/// <param name="reader">The <see cref="JsonReader"/> to read the token from.</param>
/// <param name="writeChildren">A flag indicating whether the current token's children should be written.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public Task WriteTokenAsync(JsonReader reader, bool writeChildren, CancellationToken cancellationToken = default)
{
ValidationUtils.ArgumentNotNull(reader, nameof(reader));
return WriteTokenAsync(reader, writeChildren, true, true, cancellationToken);
}
/// <summary>
/// Asynchronously writes the <see cref="JsonToken"/> token and its value.
/// </summary>
/// <param name="token">The <see cref="JsonToken"/> to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public Task WriteTokenAsync(JsonToken token, CancellationToken cancellationToken = default)
{
return WriteTokenAsync(token, null, cancellationToken);
}
/// <summary>
/// Asynchronously writes the <see cref="JsonToken"/> token and its value.
/// </summary>
/// <param name="token">The <see cref="JsonToken"/> to write.</param>
/// <param name="value">
/// The value to write.
/// A value is only required for tokens that have an associated value, e.g. the <see cref="String"/> property name for <see cref="JsonToken.PropertyName"/>.
/// <c>null</c> can be passed to the method for tokens that don't have a value, e.g. <see cref="JsonToken.StartObject"/>.
/// </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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public Task WriteTokenAsync(JsonToken token, object? value, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
switch (token)
{
case JsonToken.None:
// read to next
return AsyncUtils.CompletedTask;
case JsonToken.StartObject:
return WriteStartObjectAsync(cancellationToken);
case JsonToken.StartArray:
return WriteStartArrayAsync(cancellationToken);
case JsonToken.StartConstructor:
ValidationUtils.ArgumentNotNull(value, nameof(value));
return WriteStartConstructorAsync(value.ToString(), cancellationToken);
case JsonToken.PropertyName:
ValidationUtils.ArgumentNotNull(value, nameof(value));
return WritePropertyNameAsync(value.ToString(), cancellationToken);
case JsonToken.Comment:
return WriteCommentAsync(value?.ToString(), cancellationToken);
case JsonToken.Integer:
ValidationUtils.ArgumentNotNull(value, nameof(value));
return
#if HAVE_BIG_INTEGER
value is BigInteger integer ? WriteValueAsync(integer, cancellationToken) :
#endif
WriteValueAsync(Convert.ToInt64(value, CultureInfo.InvariantCulture), cancellationToken);
case JsonToken.Float:
ValidationUtils.ArgumentNotNull(value, nameof(value));
if (value is decimal dec)
{
return WriteValueAsync(dec, cancellationToken);
}
if (value is double doub)
{
return WriteValueAsync(doub, cancellationToken);
}
if (value is float f)
{
return WriteValueAsync(f, cancellationToken);
}
return WriteValueAsync(Convert.ToDouble(value, CultureInfo.InvariantCulture), cancellationToken);
case JsonToken.String:
ValidationUtils.ArgumentNotNull(value, nameof(value));
return WriteValueAsync(value.ToString(), cancellationToken);
case JsonToken.Boolean:
ValidationUtils.ArgumentNotNull(value, nameof(value));
return WriteValueAsync(Convert.ToBoolean(value, CultureInfo.InvariantCulture), cancellationToken);
case JsonToken.Null:
return WriteNullAsync(cancellationToken);
case JsonToken.Undefined:
return WriteUndefinedAsync(cancellationToken);
case JsonToken.EndObject:
return WriteEndObjectAsync(cancellationToken);
case JsonToken.EndArray:
return WriteEndArrayAsync(cancellationToken);
case JsonToken.EndConstructor:
return WriteEndConstructorAsync(cancellationToken);
case JsonToken.Date:
ValidationUtils.ArgumentNotNull(value, nameof(value));
if (value is DateTimeOffset offset)
{
return WriteValueAsync(offset, cancellationToken);
}
return WriteValueAsync(Convert.ToDateTime(value, CultureInfo.InvariantCulture), cancellationToken);
case JsonToken.Raw:
return WriteRawValueAsync(value?.ToString(), cancellationToken);
case JsonToken.Bytes:
ValidationUtils.ArgumentNotNull(value, nameof(value));
if (value is Guid guid)
{
return WriteValueAsync(guid, cancellationToken);
}
return WriteValueAsync((byte[]?)value, cancellationToken);
default:
throw MiscellaneousUtils.CreateArgumentOutOfRangeException(nameof(token), token, "Unexpected token type.");
}
}
internal virtual async Task WriteTokenAsync(JsonReader reader, bool writeChildren, bool writeDateConstructorAsDate, bool writeComments, CancellationToken cancellationToken)
{
int initialDepth = CalculateWriteTokenInitialDepth(reader);
do
{
// write a JValue date when the constructor is for a date
if (writeDateConstructorAsDate && reader.TokenType == JsonToken.StartConstructor && string.Equals(reader.Value?.ToString(), "Date", StringComparison.Ordinal))
{
await WriteConstructorDateAsync(reader, cancellationToken).ConfigureAwait(false);
}
else
{
if (writeComments || reader.TokenType != JsonToken.Comment)
{
await WriteTokenAsync(reader.TokenType, reader.Value, cancellationToken).ConfigureAwait(false);
}
}
} while (
// stop if we have reached the end of the token being read
initialDepth - 1 < reader.Depth - (JsonTokenUtils.IsEndToken(reader.TokenType) ? 1 : 0)
&& writeChildren
&& await reader.ReadAsync(cancellationToken).ConfigureAwait(false));
if (IsWriteTokenIncomplete(reader, writeChildren, initialDepth))
{
throw JsonWriterException.Create(this, "Unexpected end when reading token.", null);
}
}
// For internal use, when we know the writer does not offer true async support (e.g. when backed
// by a StringWriter) and therefore async write methods are always in practice just a less efficient
// path through the sync version.
internal async Task WriteTokenSyncReadingAsync(JsonReader reader, CancellationToken cancellationToken)
{
int initialDepth = CalculateWriteTokenInitialDepth(reader);
do
{
// write a JValue date when the constructor is for a date
if (reader.TokenType == JsonToken.StartConstructor && string.Equals(reader.Value?.ToString(), "Date", StringComparison.Ordinal))
{
WriteConstructorDate(reader);
}
else
{
WriteToken(reader.TokenType, reader.Value);
}
} while (
// stop if we have reached the end of the token being read
initialDepth - 1 < reader.Depth - (JsonTokenUtils.IsEndToken(reader.TokenType) ? 1 : 0)
&& await reader.ReadAsync(cancellationToken).ConfigureAwait(false));
if (initialDepth < CalculateWriteTokenFinalDepth(reader))
{
throw JsonWriterException.Create(this, "Unexpected end when reading token.", null);
}
}
private async Task WriteConstructorDateAsync(JsonReader reader, CancellationToken cancellationToken)
{
if (!await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
{
throw JsonWriterException.Create(this, "Unexpected end when reading date constructor.", null);
}
if (reader.TokenType != JsonToken.Integer)
{
throw JsonWriterException.Create(this, "Unexpected token when reading date constructor. Expected Integer, got " + reader.TokenType, null);
}
DateTime date = DateTimeUtils.ConvertJavaScriptTicksToDateTime((long)reader.Value!);
if (!await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
{
throw JsonWriterException.Create(this, "Unexpected end when reading date constructor.", null);
}
if (reader.TokenType != JsonToken.EndConstructor)
{
throw JsonWriterException.Create(this, "Unexpected token when reading date constructor. Expected EndConstructor, got " + reader.TokenType, null);
}
await WriteValueAsync(date, cancellationToken).ConfigureAwait(false);
}
/// <summary>
/// Asynchronously writes a <see cref="Nullable{T}"/> of <see cref="bool"/> value.
/// </summary>
/// <param name="value">The <see cref="Nullable{T}"/> of <see cref="bool"/> value to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteValueAsync(bool value, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteValue(value);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes a <see cref="bool"/> value.
/// </summary>
/// <param name="value">The <see cref="bool"/> value to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteValueAsync(bool? value, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteValue(value);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes a <see cref="byte"/> value.
/// </summary>
/// <param name="value">The <see cref="byte"/> value to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteValueAsync(byte value, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteValue(value);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes a <see cref="Nullable{T}"/> of <see cref="byte"/> value.
/// </summary>
/// <param name="value">The <see cref="Nullable{T}"/> of <see cref="byte"/> value to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteValueAsync(byte? value, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteValue(value);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes a <see cref="byte"/>[] value.
/// </summary>
/// <param name="value">The <see cref="byte"/>[] value to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteValueAsync(byte[]? value, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteValue(value);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes a <see cref="char"/> value.
/// </summary>
/// <param name="value">The <see cref="char"/> value to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteValueAsync(char value, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteValue(value);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes a <see cref="Nullable{T}"/> of <see cref="char"/> value.
/// </summary>
/// <param name="value">The <see cref="Nullable{T}"/> of <see cref="char"/> value to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteValueAsync(char? value, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteValue(value);
return AsyncUtils.CompletedTask;
}
/// <summary>
/// Asynchronously writes a <see cref="DateTime"/> value.
/// </summary>
/// <param name="value">The <see cref="DateTime"/> value to write.</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"/> that represents the asynchronous operation.</returns>
/// <remarks>The default behaviour is to execute synchronously, returning an already-completed task. Derived
/// classes can override this behaviour for true asynchronicity.</remarks>
public virtual Task WriteValueAsync(DateTime value, CancellationToken cancellationToken = default)
{
if (cancellationToken.IsCancellationRequested)
{
return cancellationToken.FromCanceled();
}
WriteValue(value);
return AsyncUtils.CompletedTask;
}
/// <summary>