public T this[int index]
{
get
{
EnsurePositionsBuilt();
if (_stream == null)
{
_stream = _streamProvider();
}
if (index < 0 || index > _itemPositions.Length)
{
throw new IndexOutOfRangeException("index");
}
// Seek to the item
long position = _itemPositions[index];
_stream.Seek(position, SeekOrigin.Begin);
// Build a JsonTextReader
using (JsonInnerTextReader reader = new JsonInnerTextReader(new StreamReader(_stream)))
{
reader.CloseInput = false;
reader.Read();
return(_jsonSerializer.Deserialize <T>(reader));
}
}
set => throw new NotSupportedException();
public T this[int index]
{
get
{
EnsurePositionsBuilt();
if (_stream == null)
{
_stream = _streamProvider();
}
if (index < 0 || index > _itemPositions.Length)
{
throw new IndexOutOfRangeException("index");
}
// Return last, if re-requested
if (index == _lastAccessedItemIndex)
{
return(_lastAccessedItem);
}
// Seek to the item
long position = _itemPositions[index];
_stream.Seek(position, SeekOrigin.Begin);
// Build a JsonTextReader
using (JsonInnerTextReader reader = new JsonInnerTextReader(new StreamReader(_stream)))
{
reader.CloseInput = false;
reader.Read();
// Deserialize and transform the item, if required
T item = _jsonSerializer.Deserialize <T>(reader);
if (_transformer != null)
{
item = _transformer(item);
}
_lastAccessedItemIndex = index;
_lastAccessedItem = item;
return(item);
}
}
set
{
// Don't throw if setting same instance getter returned (SarifRewritingVisitor on DeferredList)
if (index == _lastAccessedItemIndex && object.ReferenceEquals(value, _lastAccessedItem))
{
return;
}
throw new NotSupportedException();
}
}
