public IEnumerable <IGrouping <string, TripleObject> > GetSubjectGroupings(string s)
{
var sh = KeySegments.GetNameSKeySubject(_name, s);
var startS = KeyConfig.ConcatBytes(sh, KeyConfig.ByteZero);
var endS = KeyConfig.ConcatBytes(sh, KeyConfig.ByteOne);
return(new RocksSubjectGrouping(_db, _name, s, startS, endS));
}
public IEnumerable <Triple> S(string s)
{
var sh = KeySegments.GetNameSKeySubject(_name, s);
var startS = KeyConfig.ConcatBytes(sh, KeyConfig.ByteZero);
var endS = KeyConfig.ConcatBytes(sh, KeyConfig.ByteOne);
return(new RocksEnumerable(_db, startS, endS, (Iterator it) => { return it.Next(); }));
}
public IEnumerable <IGrouping <string, IGrouping <string, TripleObject> > > GetGroupings()
{
var nameBytes = KeySegments.GetNameSKey(Name);
var start = KeyConfig.ConcatBytes(nameBytes, KeyConfig.ByteZero);
var end = KeyConfig.ConcatBytes(nameBytes, KeyConfig.ByteOne);
var subjects = new RocksEnumerable(_db, start, end, (it) => {
var key = it.Key();
var splits = KeyConfig.Split(key);
var nextKey = KeyConfig.ConcatBytes(splits[0], KeyConfig.ByteZero, splits[1], KeyConfig.ByteOne);
return(it.Seek(nextKey));
}).Select(x => x.Subject);
foreach (var s in subjects)
{
var sh = KeySegments.GetNameSKeySubject(Name, s);
var startS = KeyConfig.ConcatBytes(sh, KeyConfig.ByteZero);
var endS = KeyConfig.ConcatBytes(sh, KeyConfig.ByteOne);
yield return(new RocksSubjectGrouping(_db, Name, s, startS, endS));
}
}
public IEnumerable <Triple> S(string s, Triple c)
{
var sh = KeySegments.GetNameSKeySubject(_name, s);
var startS = KeyConfig.ConcatBytes(sh, KeyConfig.ByteZero);
var endS = KeyConfig.ConcatBytes(sh, KeyConfig.ByteOne);
// todo: optimize
var(sKey, _, _) = new KeySegments(_name, c).GetKeys();
var continuation = KeyConfig.ConcatBytes(sKey, KeyConfig.ByteOne);
if (KeyConfig.ByteCompare(continuation, startS) < 0)
{
throw new InvalidOperationException("Invalid continuation token. Before range");
}
else if (KeyConfig.ByteCompare(continuation, endS) > 0)
{
return(Enumerable.Empty <Triple>());
}
return(new RocksEnumerable(_db, continuation, endS, (Iterator it) => { return it.Next(); }));
}