protected Index(Tangle <TValue> tangle, string name, Delegate function)
{
IndexFunction = function as IndexFunc <TIndexKey, TValue>;
IndexMultipleFunction = function as IndexMultipleFunc <TIndexKey, TValue>;
if ((IndexFunction == null) && (IndexMultipleFunction == null))
{
throw new InvalidOperationException("An index must have either an IndexFunc or IndexMultipleFunc");
}
Tangle = tangle;
Name = name;
KeyConverter = TangleKey.GetConverter <TIndexKey>();
IndexBase <TValue> temp;
if (tangle.Indices.TryGetValue(name, out temp))
{
throw new InvalidOperationException("An index with that name already exists");
}
BTree = new BTree(tangle.Storage, Name + "_");
tangle.Indices.Add(name, this);
if (tangle.Count != BTree.MutationSentinel)
{
Populate();
}
}
public static Future <Index <TIndexKey, TValue> > Create(Tangle <TValue> tangle, string name, IndexMultipleFunc <TIndexKey, TValue> function)
{
return(tangle.QueueWorkItem(new CreateThunk(name, function)));
}
public Future <Index <U, T> > CreateIndex <U> (string name, IndexMultipleFunc <U, T> function)
{
return(Index <U, T> .Create(this, name, function));
}
