public IEnumerable <Triple> O(TripleObject o, Triple c)
{
if (c == null)
{
return(O(o));
}
var oh = KeySegments.GetNameOKeyObject(_name, o);
var startS = KeyConfig.ConcatBytes(oh, KeyConfig.ByteZero);
var endS = KeyConfig.ConcatBytes(oh, KeyConfig.ByteOne);
var(_, _, oKey) = new KeySegments(_name, c).GetKeys();
var continuation = KeyConfig.ConcatBytes(oKey, 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(); }));
}
public bool MoveNext()
{
if (_currentKey == null)
{
_currentKey = _start;
// todo: check
_iterator = _db.NewIterator();
_iterator.Seek(_start);
var firstKey = _iterator.Key();
if (KeyConfig.ByteCompare(firstKey, _start) < 0)
{
return(false);
}
}
else
{
_nextFunction(_iterator);
_currentKey = _iterator.Key();
}
if (!_iterator.Valid())
{
return(false);
}
var key = _iterator.Key();
if (KeyConfig.ByteCompare(key, _end) > 0)
{
return(false);
}
return(true);
}
public IEnumerable <Triple> SP(string s, string p, Triple c)
{
var sh = KeySegments.GetNameSKeySubjectPredicate(_name, s, p);
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(); }));
}
public IEnumerable <Triple> P(string p, Triple c)
{
if (c == null)
{
return(P(p));
}
var ph = KeySegments.GetNamePKeyPredicate(_name, p);
var startS = KeyConfig.ConcatBytes(ph, KeyConfig.ByteZero);
var endS = KeyConfig.ConcatBytes(ph, KeyConfig.ByteOne);
var(_, pKey, _) = new KeySegments(_name, c).GetKeys();
var continuation = KeyConfig.ConcatBytes(pKey, 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(); }));
}