public MapIterator GetIterator(LevelDB.ReadOptions snapshot)
{
var head = Helper.tagKey_MapValues.Concat(this.Value).ToArray();
MapIterator it = new MapIterator(db, snapshot, head);
return(it);
}
public IValue GetItem(LevelDB.ReadOptions snapshot, byte[] key)
{
var _key = Helper.tagKey_MapValues.Concat(this.Value).Concat(key).ToArray();
var data = db.Get(snapshot, _key);
return(Helper.CreateValue(db, data));
}
public IValue GetItem(LevelDB.ReadOptions snapshot, byte[] key)
{
var _key = Helper.tagKey_Item.Concat(prefix).Concat(Helper.tagZero).Concat(key).ToArray();
var data = db.Get(snapshot, _key);
return(Helper.CreateValue(this.db, data));
}
public MapIterator(LevelDB.DB db, LevelDB.ReadOptions snapshot, byte[] head)
{
this.db = db;
this.snapshot = snapshot;
this.head = head;
this.it = new LevelDB.Iterator(db, snapshot);
it.Seek(head);
}
public UInt64 Count(LevelDB.ReadOptions ro)
{
byte[] key_count = Helper.tagKey_MapCount.Concat(this.Value).ToArray();
byte[] data = db.Get(ro, key_count);
if (data == null || data.Length == 0)
{
throw new Exception("error map in Count");
}
return(BitConverter.ToUInt64(data, 0));
}
public WriteBatch(LevelDB.DB _db, LevelDB.ReadOptions _snapshot = null)
{
this.db = _db;
this.snapshot = _snapshot;
if (this.snapshot == null)
{
this.snapshot = Helper.CreateSnapshot(db);
}
this.wb = new LevelDB.WriteBatch();
cache = new System.Collections.Concurrent.ConcurrentDictionary <System.Numerics.BigInteger, byte[]>();
}
