public IEnumerable <T> Get(int index)
{
int?firstObjectIndex = _latestObjectIndex.GetAtIndex(index);
if (firstObjectIndex == null)
{
yield break;
}
int objectIndex = firstObjectIndex.Value;
while (objectIndex != -1)
{
byte[] data = _objectIndex.GetDataAtIndex(objectIndex);
LinkedIndexItem <T>?item = null;
if (data != null)
{
item = LinkedIndexItem <T> .FromArray(data);
}
if (item != null)
{
objectIndex = item.Value.PreviousItem;
yield return(item.Value.Content);
}
else
{
objectIndex = -1;
}
}
}
public static LinkedIndexItem <T> FromArray(byte[] bytes)
{
BinaryReader reader = new BinaryReader(new MemoryStream(bytes));
LinkedIndexItem <T> s = default(LinkedIndexItem <T>);
s.Content = ConverterHelper.FromBytes <T>(reader.ReadBytes(SizeHelper.SizeOf(typeof(T))));
s.PreviousItem = reader.ReadInt32();
return(s);
}
public void Add(int index, T content)
{
lock (_writeLock)
{
int?locationOfCurrentVersion = _latestObjectIndex.GetAtIndex(index);
LinkedIndexItem <T> item = new LinkedIndexItem <T>
{
Content = content
};
item.PreviousItem = locationOfCurrentVersion ?? -1;
int itemIndex = _objectIndex.Last() + 1;
_objectIndex.SetAtIndex(itemIndex, item.ToArray());
_latestObjectIndex.SetAtIndex(index, itemIndex);
}
}