IEnumerable<NeuralVectors> DoGetNextVectors(IndexSet indexes)
{
var privIndexes = new IndexSet(indexes);
foreach (int index in privIndexes.ToList())
{
string key = CacheKeyPrefix + index;
var foundVector = cache[key] as NeuralVectors;
if (foundVector != null)
{
yield return foundVector;
privIndexes.Remove(index);
}
}
if (privIndexes.Count > 0)
{
var indexList = privIndexes.ToList();
int listIndex = 0;
foreach (var vector in BaseProvider.GetNextVectors(privIndexes))
{
int vectorIndex = indexList[listIndex++];
string key = CacheKeyPrefix + vectorIndex;
cache[key] = vector;
keys.Add(key);
yield return vector;
}
}
}