1 /*
2  * Copyright (c) 2022 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 KVSTORE_DATASHARE_BRIDGE_H
17 #define KVSTORE_DATASHARE_BRIDGE_H
18 
19 #include "kvstore_result_set.h"
20 #include "single_kvstore.h"
21 #include "result_set_bridge.h"
22 #include "datashare_errno.h"
23 
24 namespace OHOS {
25 namespace DistributedKv {
26 class KvStoreDataShareBridge : public DataShare::ResultSetBridge {
27 public:
28     KvStoreDataShareBridge(std::shared_ptr<KvStoreResultSet> kvResultSet);
29 
30     ~KvStoreDataShareBridge() = default;
31 
32     int GetRowCount(int32_t &count) override;
33 
34     int GetAllColumnNames(std::vector<std::string> &columnNames) override;
35 
36     int OnGo(int32_t startRowIndex, int32_t targetRowIndex, DataShare::ResultSetBridge::Writer &writer) override;
37 
38 private:
39     int Count();
40 
41     bool FillBlock(int startRowIndex, DataShare::ResultSetBridge::Writer &writer) __attribute__((no_sanitize("cfi")));
42 
43     static constexpr int32_t INVALID_COUNT = -1;
44 
45     int32_t resultRowCount {INVALID_COUNT};
46 
47     std::shared_ptr<KvStoreResultSet> kvResultSet_;
48 };
49 } // namespace DistributedKv
50 } // namespace OHOS
51 #endif // KVSTORE_DATASHARE_BRIDGE_H
52