/// <summary>
/// Converts a list of CosmosElements into a memory stream.
/// </summary>
/// <param name="memoryStream">The memory stream response from Azure Cosmos</param>
/// <param name="resourceType">The resource type</param>
/// <param name="cosmosSerializationOptions">The custom serialization options. This allows custom serialization types like BSON, JSON, or other formats</param>
/// <returns>Returns a memory stream of cosmos elements. By default the memory stream will contain JSON.</returns>
internal static CosmosArray ToCosmosElements(
MemoryStream memoryStream,
ResourceType resourceType,
CosmosSerializationOptions cosmosSerializationOptions = null)
{
if (!memoryStream.CanRead)
{
throw new InvalidDataException("Stream can not be read");
}
// Execute the callback an each element of the page
// For example just could get a response like this
// {
// "_rid": "qHVdAImeKAQ=",
// "Documents": [{
// "id": "03230",
// "_rid": "qHVdAImeKAQBAAAAAAAAAA==",
// "_self": "dbs\/qHVdAA==\/colls\/qHVdAImeKAQ=\/docs\/qHVdAImeKAQBAAAAAAAAAA==\/",
// "_etag": "\"410000b0-0000-0000-0000-597916b00000\"",
// "_attachments": "attachments\/",
// "_ts": 1501107886
// }],
// "_count": 1
// }
// And you should execute the callback on each document in "Documents".
long responseLengthBytes = memoryStream.Length;
byte[] content = memoryStream.ToArray();
IJsonNavigator jsonNavigator = null;
// Use the users custom navigator
if (cosmosSerializationOptions != null)
{
jsonNavigator = cosmosSerializationOptions.CreateCustomNavigatorCallback(content);
if (jsonNavigator == null)
{
throw new InvalidOperationException("The CosmosSerializationOptions did not return a JSON navigator.");
}
}
else
{
jsonNavigator = JsonNavigator.Create(content);
}
string resourceName = CosmosElementSerializer.GetRootNodeName(resourceType);
if (!jsonNavigator.TryGetObjectProperty(
jsonNavigator.GetRootNode(),
resourceName,
out ObjectProperty objectProperty))
{
throw new InvalidOperationException($"Response Body Contract was violated. QueryResponse did not have property: {resourceName}");
}
IJsonNavigatorNode cosmosElements = objectProperty.ValueNode;
if (!(CosmosElement.Dispatch(
jsonNavigator,
cosmosElements) is CosmosArray cosmosArray))
{
throw new InvalidOperationException($"QueryResponse did not have an array of : {resourceName}");
}
return(cosmosArray);
}
