1 /*
2  * Copyright (c) 2023 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 OHOS_DISTRIBUTED_DATA_SERVICES_FRAMEWORK_STORE_CURSOR_H
17 #define OHOS_DISTRIBUTED_DATA_SERVICES_FRAMEWORK_STORE_CURSOR_H
18 #include <map>
19 #include <variant>
20 #include <vector>
21 
22 #include "store/general_value.h"
23 namespace OHOS::DistributedData {
24 class Cursor {
25 public:
26     virtual ~Cursor() = default;
27 
28     virtual int32_t GetColumnNames(std::vector<std::string> &names) const = 0;
29 
30     virtual int32_t GetColumnName(int32_t col, std::string &name) const = 0;
31 
32     virtual int32_t GetColumnType(int32_t col) const = 0;
33 
34     virtual int32_t GetCount() const = 0;
35 
36     virtual int32_t MoveToFirst() = 0;
37 
38     virtual int32_t MoveToNext() = 0;
39 
40     virtual int32_t MoveToPrev() = 0;
41 
42     virtual int32_t GetEntry(VBucket &entry) = 0;
43 
44     virtual int32_t GetRow(VBucket &data) = 0;
45 
46     virtual int32_t Get(int32_t col, Value &value) = 0;
47 
48     virtual int32_t Get(const std::string &col, Value &value) = 0;
49 
50     virtual int32_t Close() = 0;
51 
52     virtual bool IsEnd() = 0;
53 };
54 } // namespace OHOS::DistributedData
55 #endif // OHOS_DISTRIBUTED_DATA_SERVICES_FRAMEWORK_STORE_CURSOR_H
56