1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef I_KV_DB_RAW_CURSOR_H
17 #define I_KV_DB_RAW_CURSOR_H
18 
19 #include "macro_utils.h"
20 #include "db_types.h"
21 
22 namespace DistributedDB {
23 class IKvDBRawCursor {
24 public:
25     IKvDBRawCursor() = default;
~IKvDBRawCursor()26     virtual ~IKvDBRawCursor() {}
27 
28     DISABLE_COPY_ASSIGN_MOVE(IKvDBRawCursor);
29 
30     // Open the raw cursor.
31     virtual int Open() = 0;
32 
33     // Close the raw cursor before invoking operator delete.
34     virtual void Close() = 0;
35 
36     // Reload all data.
37     virtual int Reload() = 0;
38 
39     // Get total entries count.
40     virtual int GetCount() const = 0;
41 
42     // Get next entry, return errCode if it fails.
43     virtual int GetNext(Entry &entry, bool isCopy) const = 0;
44 };
45 } // namespace DistributedDB
46 
47 #endif // I_KV_DB_RAW_CURSOR_H
48