private string GenerateBulkCommand <T>(IEnumerable <T> @objects)
{
@objects.ThrowIfNull("objects");
var index = this.Settings.DefaultIndex;
if (string.IsNullOrEmpty(index))
{
throw new NullReferenceException("Cannot infer default index for current connection.");
}
if (@objects.Count() == 0)
{
return(null);
}
var type = typeof(T);
var typeName = Inflector.MakePlural(type.Name).ToLower();
Func <T, string> idSelector = null;
var idProperty = type.GetProperty("Id");
if (idProperty != null)
{
if (idProperty.PropertyType == typeof(int))
{
idSelector = (@object) => ((int)@object.TryGetPropertyValue("Id")).ToString();
}
else if (idProperty.PropertyType == typeof(int?))
{
idSelector = (@object) =>
{
int?val = (int?)@object.TryGetPropertyValue("Id");
return((val.HasValue) ? val.Value.ToString() : string.Empty);
}
}
;
else if (idProperty.PropertyType == typeof(string))
{
idSelector = (@object) => (string)@object.TryGetPropertyValue("Id");
}
}
var sb = new StringBuilder();
var command = "{{ \"index\" : {{ \"_index\" : \"{0}\", \"_type\" : \"{1}\", \"_id\" : \"{2}\" }} }}\n";
//if we can't reflect id let ES create one.
if (idSelector == null)
{
command = "{{ \"index\" : {{ \"_index\" : \"{0}\", \"_type\" : \"{1}\" }} }}\n".F(index, typeName);
}
foreach (var @object in objects)
{
string jsonCommand = JsonConvert.SerializeObject(@object, Formatting.None, this.SerializationSettings);
if (idSelector == null)
{
sb.Append(command);
}
else
{
sb.Append(command.F(index, typeName, idSelector(@object)));
}
sb.Append(jsonCommand + "\n");
}
var json = sb.ToString();
return(json);
}