/// <summary>
/// Asynchronous implementation of the reader logic when in state 'Operation'.
/// </summary>
/// <returns>
/// A task that represents the asynchronous read operation.
/// The value of the TResult parameter contains the batch reader state after the read.
/// </returns>
protected override async Task <ODataBatchReaderState> ReadAtOperationImplementationAsync()
{
if (this.JsonLightInputContext.JsonReader.NodeType != JsonNodeType.StartObject)
{
// No more requests in the batch.
return(await HandleMessagesEndAsync()
.ConfigureAwait(false));
}
// Load the message properties if there is no cached item for processing.
if (this.messagePropertiesCache == null)
{
// Load the message details since operation is detected.
this.messagePropertiesCache = await ODataJsonLightBatchPayloadItemPropertiesCache.CreateAsync(this)
.ConfigureAwait(false);
}
// Calculate and return next state with changeset state detection.
return(DetectChangesetStates(this.messagePropertiesCache));
}
/// <summary>
/// Asynchronous implementation of the reader logic when in state 'Start'.
/// </summary>
/// <returns>
/// A task that represents the asynchronous read operation.
/// The value of the TResult parameter contains the batch reader state after the read.
/// </returns>
protected override async Task <ODataBatchReaderState> ReadAtStartImplementationAsync()
{
Debug.Assert(this.State == ODataBatchReaderState.Initial, $"{nameof(this.State)} == {nameof(ODataBatchReaderState.Initial)}");
if (mode == ReaderMode.NotDetected)
{
// The stream should be positioned at the beginning of the batch envelope.
// Need to detect whether we are reading request or response. Stay in Initial state upon return.
await DetectReaderModeAsync()
.ConfigureAwait(false);
return(ODataBatchReaderState.Initial);
}
else
{
// The stream should be positioned at the beginning of requests array.
await this.StartReadingBatchArrayAsync()
.ConfigureAwait(false);
Debug.Assert(this.messagePropertiesCache == null, $"{nameof(this.messagePropertiesCache)} == null");
this.messagePropertiesCache = await ODataJsonLightBatchPayloadItemPropertiesCache.CreateAsync(this)
.ConfigureAwait(false);
string currentGroup = (string)this.messagePropertiesCache.GetPropertyValue(
ODataJsonLightBatchPayloadItemPropertiesCache.PropertyNameAtomicityGroup);
if (currentGroup == null)
{
return(ODataBatchReaderState.Operation);
}
else
{
HandleNewAtomicGroupStart(
(string)this.messagePropertiesCache.GetPropertyValue(
ODataJsonLightBatchPayloadItemPropertiesCache.PropertyNameId),
currentGroup);
return(ODataBatchReaderState.ChangesetStart);
}
}
}
