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 DATASHARESERVICE_QUERY_STRAGETY_H 17 #define DATASHARESERVICE_QUERY_STRAGETY_H 18 19 #include <shared_mutex> 20 21 #include "seq_strategy.h" 22 #include "rdb_delegate.h" 23 24 namespace OHOS::DataShare { 25 class QueryStrategy final { 26 public: 27 std::shared_ptr<DataShareResultSet> Execute(std::shared_ptr<Context> context, 28 const DataSharePredicates &predicates, const std::vector<std::string> &columns, int &errCode); 29 30 private: 31 SeqStrategy &GetStrategy(); 32 std::mutex mutex_; 33 SeqStrategy strategies_; 34 }; 35 } // namespace OHOS::DataShare 36 #endif 37