async Task <ProvisioningQueryResult> ExecuteQueryAsync(Uri queryUri, int?pageSize, string continuationToken, CancellationToken cancellationToken)
{
ThrowIfClosed();
//TODO: support sqlQueryStrings
var customHeaders = new Dictionary <string, string>();
if (!string.IsNullOrWhiteSpace(continuationToken))
{
customHeaders.Add(ContinuationTokenHeader, continuationToken);
}
if (pageSize != null)
{
customHeaders.Add(PageSizeHeader, pageSize.ToString());
}
HttpResponseMessage response = await this.httpClientHelper.PostAsync <QuerySpecification>(
queryUri,
new QuerySpecification
{
Sql = string.Empty
},
null,
customHeaders,
new MediaTypeHeaderValue("application/json") { CharSet = "utf-8" },
null,
cancellationToken);
return(await ProvisioningQueryResult.FromHttpResponseAsync(response));
}
async Task <ProvisioningQueryResult> GetNextAsync(QueryOptions options)
{
this.newQuery = false;
ProvisioningQueryResult result = await this.queryTaskFunc(!string.IsNullOrWhiteSpace(options?.ContinuationToken)?options.ContinuationToken : this.continuationToken);
this.continuationToken = result.ContinuationToken;
return(result);
}
static IEnumerable <T> CastResultContent <T>(ProvisioningQueryResult result, ProvisioningQueryResultType expected)
{
if (result.Type != expected)
{
throw new InvalidCastException($"result type is {result.Type}");
}
// TODO: optimize this 2nd parse from JObject to target object type T
return(result.Items.Select(o => ((JObject)o).ToObject <T>()));
}
public async Task <QueryResponse <string> > GetNextAsJsonAsync(QueryOptions options)
{
IEnumerable <string> response;
if (!this.HasMoreResults)
{
response = new List <string>();
}
else
{
ProvisioningQueryResult r = await this.GetNextAsync(options);
response = r.Items.Select(o => o.ToString());
}
return(new QueryResponse <string>(response, this.continuationToken));
}
async Task <IEnumerable <T> > GetAndCastNextResultAsync <T>(ProvisioningQueryResultType type, QueryOptions options)
{
ProvisioningQueryResult r = await this.GetNextAsync(options);
return(CastResultContent <T>(r, type));
}