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 #ifndef DATA_TRANSFORMER_H 16 #define DATA_TRANSFORMER_H 17 #ifdef RELATIONAL_STORE 18 19 #include <vector> 20 #include "data_value.h" 21 #include "db_types.h" 22 #include "relational_schema_object.h" 23 24 namespace DistributedDB { 25 using RowData = std::vector<DataValue>; 26 using OptRowData = std::vector<DataValue>; 27 28 struct LogInfo { 29 int64_t dataKey = -1; 30 std::string device; 31 std::string originDev; 32 Timestamp timestamp = 0; 33 Timestamp wTimestamp = 0; 34 uint64_t flag = 0; 35 Key hashKey; // primary key hash value 36 }; 37 38 struct RowDataWithLog { 39 LogInfo logInfo; 40 RowData rowData; 41 }; 42 43 struct OptRowDataWithLog { 44 LogInfo logInfo; 45 OptRowData optionalData; 46 }; 47 48 struct TableDataWithLog { 49 std::string tableName; 50 std::vector<RowDataWithLog> dataList; 51 }; 52 53 struct OptTableDataWithLog { 54 std::string tableName; 55 std::vector<OptRowDataWithLog> dataList; 56 }; 57 58 class DataTransformer { 59 public: 60 static int TransformTableData(const TableDataWithLog &tableDataWithLog, 61 const std::vector<FieldInfo> &fieldInfoList, std::vector<DataItem> &dataItems); 62 static int TransformDataItem(const std::vector<DataItem> &dataItems, const std::vector<FieldInfo> &remoteFieldInfo, 63 const std::vector<FieldInfo> &localFieldInfo, OptTableDataWithLog &tableDataWithLog); 64 65 static int SerializeDataItem(const RowDataWithLog &data, const std::vector<FieldInfo> &fieldInfo, 66 DataItem &dataItem); 67 static int DeSerializeDataItem(const DataItem &dataItem, OptRowDataWithLog &data, 68 const std::vector<FieldInfo> &remoteFieldInfo); 69 70 static uint32_t CalDataValueLength(const DataValue &dataValue); 71 static int DeserializeDataValue(DataValue &dataValue, Parcel &parcel); 72 static int SerializeDataValue(const DataValue &dataValue, Parcel &parcel); 73 74 private: 75 static int SerializeValue(Value &value, const RowData &rowData, const std::vector<FieldInfo> &fieldInfoList); 76 static int DeSerializeValue(const Value &value, OptRowData &optionalData, 77 const std::vector<FieldInfo> &remoteFieldInfo); 78 }; 79 } 80 81 #endif 82 #endif // DATA_TRANSFORMER_H