internal DBLob(DBCollection cl)
{
this._cl = cl;
this._connection = cl.CollSpace.SequoiaDB.Connection;
this._isBigEndian = cl.isBigEndian;
_id = ObjectId.Empty;
_mode = -1;
_size = 0;
_readOffset = -1;
_createTime = 0;
_isOpen = false;
_contextID = -1;
}
internal DBCursor(SDBMessage rtnSDBMessage, DBCollection dbc)
{
this.dbc = dbc;
connection = dbc.CollSpace.SequoiaDB.Connection;
hint = new BsonDocument();
hint.Add("", SequoiadbConstants.CLIENT_RECORD_ID_INDEX);
sdbMessage = new SDBMessage();
reqId = rtnSDBMessage.RequestID;
sdbMessage.NodeID = SequoiadbConstants.ZERO_NODEID;
sdbMessage.ContextIDList = rtnSDBMessage.ContextIDList;
contextId = sdbMessage.ContextIDList[0];
sdbMessage.NumReturned = -1; // return data count
list = rtnSDBMessage.ObjectList; // while using fineOne, ObjectList may have data
hasMore = true;
isBigEndian = dbc.isBigEndian;
isClosed = false;
this.DBQuery = new DBQuery();
}
/* \fn void UpdateCurrent(BsonDocument modifier)
* \brief Update the current Bson of this cursor
* \param modifier The updating rule
* \exception SequoiaDB.BaseException
* \exception System.Exception
*/
/*
* public void UpdateCurrent(BsonDocument modifier)
* {
* if (modifier == null)
* throw new BaseException("SDB_INVALIDARG");
* if (dbc == null)
* throw new BaseException("SDB_CLT_OBJ_NOT_EXIST");
* BsonDocument current;
* if (( current = Current()) != null )
* {
* BsonDocument matcher = new BsonDocument();
* matcher.Add(SequoiadbConstants.OID, current[SequoiadbConstants.OID].AsObjectId);
* dbc.Update(matcher, modifier, hint);
* BsonDocument dummy = new BsonDocument();
* list[index] = dbc.Query(matcher, dummy, dummy, dummy).Next();
* }
* }
*/
/* \fn void DeleteCurrent()
* \brief Delete the current Bson of this cursor
* \exception SequoiaDB.BaseException
* \exception System.Exception
*/
/*
* public void DeleteCurrent()
* {
* if ( Current() != null )
* dbc.Delete( list[index] );
* list.RemoveAt(index);
* if (index >= list.Count)
* index = -1;
* }
*/
private void ReadNextBuffer()
{
if (connection == null)
{
throw new BaseException("SDB_NOT_CONNECTED");
}
if (-1 == contextId)
{
hasMore = false;
index = -1;
dbc = null;
list = null;
return;
}
sdbMessage.OperationCode = Operation.OP_GETMORE;
sdbMessage.RequestID = reqId;
byte[] request = SDBMessageHelper.BuildGetMoreRequest(sdbMessage, isBigEndian);
connection.SendMessage(request);
SDBMessage rtnSDBMessage = SDBMessageHelper.MsgExtractReply(connection.ReceiveMessage(isBigEndian), isBigEndian);
rtnSDBMessage = SDBMessageHelper.CheckRetMsgHeader(sdbMessage, rtnSDBMessage);
int flags = rtnSDBMessage.Flags;
if (flags == SequoiadbConstants.SDB_DMS_EOC)
{
hasMore = false;
index = -1;
dbc = null;
list = null;
}
else if (flags != 0)
{
throw new BaseException(flags);
}
else
{
reqId = rtnSDBMessage.RequestID;
list = rtnSDBMessage.ObjectList;
}
}
internal DBCursor(SDBMessage rtnSDBMessage, DBCollection dbc)
: base(rtnSDBMessage, dbc)
{
this.m_Enumerator = new DBCursorEnumerator <TDocument>(this);
}