| /* |
| * 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.tsfile.read.query.dataset; |
| |
| import org.apache.iotdb.tsfile.exception.write.UnSupportedDataTypeException; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.read.common.BatchData; |
| import org.apache.iotdb.tsfile.read.common.Field; |
| import org.apache.iotdb.tsfile.read.common.Path; |
| import org.apache.iotdb.tsfile.read.common.RowRecord; |
| import org.apache.iotdb.tsfile.read.reader.series.AbstractFileSeriesReader; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.PriorityQueue; |
| import java.util.Set; |
| |
| /** multi-way merging data set, no need to use TimeGenerator. */ |
| public class DataSetWithoutTimeGenerator extends QueryDataSet { |
| |
| private final List<AbstractFileSeriesReader> readers; |
| |
| private List<BatchData> batchDataList; |
| |
| private List<Boolean> hasDataRemaining; |
| |
| /** heap only need to store time. */ |
| private PriorityQueue<Long> timeHeap; |
| |
| private Set<Long> timeSet; |
| |
| /** |
| * constructor of DataSetWithoutTimeGenerator. |
| * |
| * @param paths paths in List structure |
| * @param dataTypes TSDataTypes in List structure |
| * @param readers readers in List(FileSeriesReaderByTimestamp) structure |
| * @throws IOException IOException |
| */ |
| public DataSetWithoutTimeGenerator( |
| List<Path> paths, List<TSDataType> dataTypes, List<AbstractFileSeriesReader> readers) |
| throws IOException { |
| super(paths, dataTypes); |
| this.readers = readers; |
| initHeap(); |
| } |
| |
| private void initHeap() throws IOException { |
| hasDataRemaining = new ArrayList<>(); |
| batchDataList = new ArrayList<>(); |
| timeHeap = new PriorityQueue<>(); |
| timeSet = new HashSet<>(); |
| |
| for (int i = 0; i < paths.size(); i++) { |
| AbstractFileSeriesReader reader = readers.get(i); |
| if (!reader.hasNextBatch()) { |
| batchDataList.add(new BatchData()); |
| hasDataRemaining.add(false); |
| } else { |
| batchDataList.add(reader.nextBatch()); |
| hasDataRemaining.add(true); |
| } |
| } |
| |
| for (BatchData data : batchDataList) { |
| if (data.hasCurrent()) { |
| timeHeapPut(data.currentTime()); |
| } |
| } |
| } |
| |
| @Override |
| public boolean hasNextWithoutConstraint() { |
| return !timeHeap.isEmpty(); |
| } |
| |
| @SuppressWarnings("squid:S3776") // Suppress high Cognitive Complexity warning |
| @Override |
| public RowRecord nextWithoutConstraint() throws IOException { |
| long minTime = timeHeapGet(); |
| |
| RowRecord rowRecord = new RowRecord(minTime); |
| |
| for (int i = 0; i < paths.size(); i++) { |
| if (Boolean.FALSE.equals(hasDataRemaining.get(i))) { |
| rowRecord.addField(null); |
| continue; |
| } |
| |
| BatchData data = batchDataList.get(i); |
| |
| if (data.hasCurrent() && data.currentTime() == minTime) { |
| Field field = putValueToField(data); |
| data.next(); |
| |
| if (!data.hasCurrent()) { |
| AbstractFileSeriesReader reader = readers.get(i); |
| if (reader.hasNextBatch()) { |
| data = reader.nextBatch(); |
| if (data.hasCurrent()) { |
| batchDataList.set(i, data); |
| timeHeapPut(data.currentTime()); |
| } else { |
| hasDataRemaining.set(i, false); |
| } |
| } else { |
| hasDataRemaining.set(i, false); |
| } |
| } else { |
| timeHeapPut(data.currentTime()); |
| } |
| rowRecord.addField(field); |
| } else { |
| rowRecord.addField(null); |
| } |
| } |
| return rowRecord; |
| } |
| |
| /** keep heap from storing duplicate time. */ |
| private void timeHeapPut(long time) { |
| if (!timeSet.contains(time)) { |
| timeSet.add(time); |
| timeHeap.add(time); |
| } |
| } |
| |
| private Long timeHeapGet() { |
| Long t = timeHeap.poll(); |
| timeSet.remove(t); |
| return t; |
| } |
| |
| private Field putValueToField(BatchData col) { |
| TSDataType type = col.getDataType(); |
| Field field; |
| if (type == TSDataType.VECTOR) { |
| field = new Field((col.getVector())[0].getDataType()); |
| } else { |
| field = new Field(col.getDataType()); |
| } |
| switch (col.getDataType()) { |
| case BOOLEAN: |
| field.setBoolV(col.getBoolean()); |
| break; |
| case INT32: |
| field.setIntV(col.getInt()); |
| break; |
| case INT64: |
| field.setLongV(col.getLong()); |
| break; |
| case FLOAT: |
| field.setFloatV(col.getFloat()); |
| break; |
| case DOUBLE: |
| field.setDoubleV(col.getDouble()); |
| break; |
| case TEXT: |
| field.setBinaryV(col.getBinary()); |
| break; |
| case VECTOR: |
| Field.setTsPrimitiveValue((col.getVector())[0], field); |
| break; |
| default: |
| throw new UnSupportedDataTypeException("UnSupported" + col.getDataType()); |
| } |
| return field; |
| } |
| } |