internal static IEnumerable <object> ReadDocumentsAs(Type documentType, string filePath, FileFormat format)
{
if (format == FileFormat.Auto)
{
format = filePath.EndsWith(".json", StringComparison.OrdinalIgnoreCase) ? FileFormat.Json : FileFormat.Bson;
}
var serializer = BsonSerializer.LookupSerializer(documentType);
var options = DocumentSerializationOptions.Defaults;
if (format == FileFormat.Json)
{
var jb = new JsonBuffer(File.ReadAllText(filePath));
bool array = false;
for (; ;)
{
// skip white
int c;
for (; ;)
{
// end or white?
if ((c = jb.Read()) <= 32)
{
// end?
if (c < 0)
{
goto end;
}
// white
continue;
}
// document
if (c == '{')
{
jb.UnRead(c);
break;
}
// array
if (c == ',')
{
if (array)
{
continue;
}
}
else if (c == ']')
{
if (array)
{
array = false;
continue;
}
}
else if (c == '[')
{
if (!array)
{
array = true;
continue;
}
}
throw new FormatException(string.Format(null, "Unexpected character '{0}' at position {1}.", (char)c, jb.Position - 1));
}
using (var bsonReader = BsonReader.Create(jb))
yield return(serializer.Deserialize(bsonReader, documentType, options));
}
end :;
}
else
{
using (var stream = File.OpenRead(filePath))
{
long length = stream.Length;
while (stream.Position < length)
{
using (var bsonReader = BsonReader.Create(stream))
yield return(serializer.Deserialize(bsonReader, documentType, options));
}
}
}
}