private IList<object> GetAllDescendantReaderKeys(object seed)
{
var all = new List<object>(17) {seed}; // will grow as we iter
for (var i = 0; i < all.Count; i++)
{
var obj = all[i];
// TODO: We don't check closed readers here (as getTopReaderContext
// throws AlreadyClosedException), what should we do? Reflection?
var reader = obj as IndexReader;
if (reader != null)
{
try
{
var childs = reader.Context.Children;
if (childs != null) // it is composite reader
{
foreach (var ctx in childs)
{
all.Add(ctx.Reader.CoreCacheKey);
}
}
}
catch (AlreadyClosedException)
{
// ignore this reader
}
}
}
// need to skip the first, because it was the seed
return all.GetRange(1, all.Count - 1);
}
