| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.iotdb.db.pipe.event.common.tsfile; |
| |
| import org.apache.iotdb.commons.pipe.config.PipeConfig; |
| import org.apache.iotdb.pipe.api.exception.PipeException; |
| |
| import org.apache.tsfile.common.constant.TsFileConstant; |
| import org.apache.tsfile.enums.TSDataType; |
| import org.apache.tsfile.read.TsFileReader; |
| import org.apache.tsfile.read.common.Field; |
| import org.apache.tsfile.read.common.Path; |
| import org.apache.tsfile.read.common.RowRecord; |
| import org.apache.tsfile.read.expression.IExpression; |
| import org.apache.tsfile.read.expression.QueryExpression; |
| import org.apache.tsfile.read.query.dataset.QueryDataSet; |
| import org.apache.tsfile.write.record.Tablet; |
| import org.apache.tsfile.write.schema.MeasurementSchema; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.NoSuchElementException; |
| import java.util.stream.Collectors; |
| |
| public class TsFileInsertionDataTabletIterator implements Iterator<Tablet> { |
| |
| private final TsFileReader tsFileReader; |
| private final Map<String, TSDataType> measurementDataTypeMap; |
| |
| private final String deviceId; |
| private final List<String> measurements; |
| |
| private final IExpression timeFilterExpression; |
| |
| private final QueryDataSet queryDataSet; |
| |
| public TsFileInsertionDataTabletIterator( |
| TsFileReader tsFileReader, |
| Map<String, TSDataType> measurementDataTypeMap, |
| String deviceId, |
| List<String> measurements, |
| IExpression timeFilterExpression) |
| throws IOException { |
| this.tsFileReader = tsFileReader; |
| this.measurementDataTypeMap = measurementDataTypeMap; |
| |
| this.deviceId = deviceId; |
| this.measurements = |
| measurements.stream() |
| .filter( |
| measurement -> |
| // time column in aligned time-series should not be a query column |
| measurement != null && !measurement.isEmpty()) |
| .sorted() |
| .collect(Collectors.toList()); |
| |
| this.timeFilterExpression = timeFilterExpression; |
| |
| this.queryDataSet = buildQueryDataSet(); |
| } |
| |
| private QueryDataSet buildQueryDataSet() throws IOException { |
| final List<Path> paths = new ArrayList<>(); |
| for (String measurement : measurements) { |
| paths.add(new Path(deviceId, measurement, false)); |
| } |
| return tsFileReader.query(QueryExpression.create(paths, timeFilterExpression)); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| try { |
| return queryDataSet.hasNext(); |
| } catch (IOException e) { |
| throw new PipeException("Failed to check next", e); |
| } |
| } |
| |
| @Override |
| public Tablet next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| |
| try { |
| return buildNextTablet(); |
| } catch (IOException e) { |
| throw new PipeException("Failed to build tablet", e); |
| } |
| } |
| |
| private Tablet buildNextTablet() throws IOException { |
| final List<MeasurementSchema> schemas = new ArrayList<>(); |
| for (final String measurement : measurements) { |
| final TSDataType dataType = |
| measurementDataTypeMap.get(deviceId + TsFileConstant.PATH_SEPARATOR + measurement); |
| schemas.add(new MeasurementSchema(measurement, dataType)); |
| } |
| final Tablet tablet = |
| new Tablet(deviceId, schemas, PipeConfig.getInstance().getPipeDataStructureTabletRowSize()); |
| tablet.initBitMaps(); |
| |
| while (queryDataSet.hasNext()) { |
| final RowRecord rowRecord = queryDataSet.next(); |
| |
| final int rowIndex = tablet.rowSize; |
| |
| tablet.addTimestamp(rowIndex, rowRecord.getTimestamp()); |
| |
| final List<Field> fields = rowRecord.getFields(); |
| final int fieldSize = fields.size(); |
| for (int i = 0; i < fieldSize; i++) { |
| final Field field = fields.get(i); |
| tablet.addValue( |
| measurements.get(i), |
| rowIndex, |
| field == null ? null : field.getObjectValue(field.getDataType())); |
| } |
| |
| tablet.rowSize++; |
| |
| if (tablet.rowSize == tablet.getMaxRowNumber()) { |
| break; |
| } |
| } |
| |
| return tablet; |
| } |
| } |