/// <summary>
/// Processes the <b>Odata</b> <i>query</i> <see cref="HttpResponseMessage"/>.
/// </summary>
/// <typeparam name="T">The entity <see cref="Type"/>.</typeparam>
/// <param name="response">The <see cref="HttpResponseMessage"/>.</param>
/// <param name="queryArgs">The <see cref="ODataArgs"/>.</param>
/// <param name="queryAggregator">The <see cref="ODataQueryAggregator"/>.</param>
/// <param name="coll">The collection to add to.</param>
/// <returns>The <see cref="Task"/>.</returns>
internal async Task ProcessQueryResponse <T>(HttpResponseMessage response, ODataArgs queryArgs, ODataQueryAggregator queryAggregator, ICollection <T> coll)
{
EnsureSuccessStatusCodeForResponse(response);
var type = typeof(T);
IODataMapper mapper = null;
PropertyInfo pi = null;
switch (queryAggregator.SelectClause.Selector.NodeType)
{
case System.Linq.Expressions.ExpressionType.MemberAccess:
mapper = queryArgs.Mapper;
var me = (System.Linq.Expressions.MemberExpression)queryAggregator.SelectClause.Selector;
pi = (PropertyInfo)me.Member;
break;
default:
mapper = queryArgs.Mapper.SrceType == type ? queryArgs.Mapper : ODataAutoMapper.GetMapper(type);
break;
}
int?count = null;
using (var s = await response.Content.ReadAsStreamAsync().ConfigureAwait(false))
using (var sr = new StreamReader(s))
using (var jr = new JsonTextReader(sr))
{
var json = await JObject.LoadAsync(jr).ConfigureAwait(false);
count = json.Value <int?>("@odata.count");
foreach (var jt in json.GetValue("value"))
{
var obj = mapper.MapFromOData(jt, Mapper.OperationTypes.Get);
if (pi == null)
{
coll.Add((T)obj);
}
else
{
coll.Add((T)pi.GetValue(obj));
}
}
}
if (count.HasValue && queryArgs.Paging != null && queryArgs.Paging.IsGetCount)
{
queryArgs.Paging.TotalCount = count.Value;
}
}
/// <summary>
/// Sets up (creates) and auto-maps the <paramref name="args"/>.
/// </summary>
/// <typeparam name="T">The <see cref="Type"/>.</typeparam>
/// <param name="args">The <see cref="ODataArgs"/>.</param>
/// <returns>An updated or created <see cref="ODataArgs"/>.</returns>
internal ODataArgs SetUpArgs <T>(ODataArgs args)
{
var oa = args ?? new ODataArgs();
if (oa.Mapper == null)
{
oa.Mapper = ODataAutoMapper.GetMapper(typeof(T));
}
else if (oa.Mapper.SrceType != typeof(T))
{
throw new ArgumentException($"The Entity Type is '{typeof(T).Name}' and the Mapper Type is '{oa.Mapper.SrceType.Name}'; these must be the same.");
}
args = oa;
return(args);
}