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_EXTENSION_CLOUD_CURSOR_IMPL_H 17 #define OHOS_DISTRIBUTED_DATA_SERVICES_EXTENSION_CLOUD_CURSOR_IMPL_H 18 19 #include <set> 20 #include "basic_rust_types.h" 21 #include "cloud_ext_types.h" 22 #include "cloud/schema_meta.h" 23 #include "store/cursor.h" 24 25 namespace OHOS::CloudData { 26 using DBVBucket = DistributedData::VBucket; 27 using DBSchemaMeta = DistributedData::SchemaMeta; 28 using DBValue = DistributedData::Value; 29 using DBErr = DistributedData::GeneralError; 30 class CloudCursorImpl : public DistributedData::Cursor { 31 public: 32 explicit CloudCursorImpl(OhCloudExtCloudDbData *cloudData); 33 ~CloudCursorImpl(); 34 int32_t GetColumnNames(std::vector<std::string> &names) const override; 35 int32_t GetColumnName(int32_t col, std::string &name) const override; 36 int32_t GetColumnType(int32_t col) const override; 37 int32_t GetCount() const override; 38 int32_t MoveToFirst() override; 39 int32_t MoveToNext() override; 40 int32_t MoveToPrev() override; 41 int32_t GetEntry(DBVBucket &entry) override; 42 int32_t GetRow(DBVBucket &data) override; 43 int32_t Get(int32_t col, DBValue &value) override; 44 int32_t Get(const std::string &col, DBValue &value) override; 45 int32_t Close() override; 46 bool IsEnd() override; 47 48 private: 49 enum Flag : int32_t { 50 INSERT = 0, 51 UPDATE = 1, 52 DELETE = 2 53 }; 54 static const size_t INVALID_INDEX = SIZE_MAX; 55 static constexpr const char *OPERATION_KEY = "operation"; 56 static constexpr const char *GID_KEY = "id"; 57 static constexpr const char *CREATE_TIME_KEY = "createTime"; 58 static constexpr const char *MODIFY_TIME_KEY = "modifyTime"; 59 template<class T> 60 inline static constexpr auto TYPE_INDEX = DistributedData::TYPE_INDEX<T>; 61 62 std::vector<std::pair<std::string, DBValue>> GetData(OhCloudExtValueBucket *vb); 63 DBValue GetExtend(OhCloudExtValueBucket *vb, const std::string &col); 64 OhCloudExtCloudDbData *cloudData_ = nullptr; 65 OhCloudExtVector *values_ = nullptr; 66 size_t valuesLen_ = 0; 67 bool finished_ = true; 68 std::string cursor_; 69 size_t index_ = INVALID_INDEX; 70 bool consumed_ = false; 71 std::vector<std::string> names_; 72 }; 73 } // namespace OHOS::CloudData 74 #endif // OHOS_DISTRIBUTED_DATA_SERVICES_EXTENSION_CLOUD_CURSOR_IMPL_H 75