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 DATASHARE_HELPER_H
17 #define DATASHARE_HELPER_H
18 
19 #include <cstdint>
20 #include <string>
21 
22 #include "data_ability_observer_interface.h"
23 #include "datashare_value_object.h"
24 #include "datashare_values_bucket.h"
25 #include "uri.h"
26 
27 namespace OHOS {
28 namespace DataShare {
29 constexpr int32_t E_OK = 0;
30 class DataSharePredicates {
31 public:
32     DataSharePredicates *EqualTo(const std::string &field, const std::string &value);
33 };
34 class DatashareBusinessError {};
35 class DataShareResultSet {
36 public:
37     DataShareResultSet() = default;
38     ~DataShareResultSet() = default;
39     static int32_t GetRowCount(int32_t &count);
40     static int32_t Close();
41     static int32_t GoToFirstRow();
42     static int32_t GetColumnIndex(const std::string &columnName, int32_t &columnIndex);
43     int32_t GetString(int columnIndex, std::string &value) const;
44 
45 private:
46     std::string strValue_;
47 };
48 
49 class DataShareHelper {
50 public:
51     DataShareHelper() = default;
52     ~DataShareHelper() = default;
53     static std::shared_ptr<DataShareHelper> Creator(
54         const sptr<IRemoteObject> &token, const std::string &strUri, const std::string &extUri);
55     std::shared_ptr<DataShareResultSet> Query(Uri &uri, const DataSharePredicates &predicates,
56         std::vector<std::string> &columns, DatashareBusinessError *businessError = nullptr);
57     static void RegisterObserver(const Uri &uri, const sptr<AAFwk::IDataAbilityObserver> &dataObserver);
58     static void UnregisterObserver(const Uri &uri, const sptr<AAFwk::IDataAbilityObserver> &dataObserver);
59     static bool Release();
60     static int Update(Uri &uri, const DataSharePredicates &predicates, const DataShareValuesBucket &value);
61     static int Insert(Uri &uri, const DataShareValuesBucket &value);
62 
63 private:
64     static std::shared_ptr<DataShareHelper> instance_;
65     std::shared_ptr<DataShareResultSet> resultSet_;
66 };
67 } // namespace DataShare
68 } // namespace OHOS
69 #endif // DATASHARE_HELPER_H
70