| /* |
| * 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.queryengine.execution.operator.window; |
| |
| import org.apache.iotdb.db.queryengine.execution.aggregation.Aggregator; |
| import org.apache.iotdb.db.queryengine.execution.aggregation.timerangeiterator.ITimeRangeIterator; |
| import org.apache.iotdb.db.queryengine.execution.operator.AggregationUtil; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.read.common.block.TsBlock; |
| import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder; |
| import org.apache.iotdb.tsfile.read.common.block.TsBlockUtil; |
| |
| import java.util.List; |
| |
| public class TimeWindowManager implements IWindowManager { |
| |
| private final TimeWindow curWindow; |
| private final boolean ascending; |
| private final ITimeRangeIterator timeRangeIterator; |
| private final boolean needOutputEndTime; |
| private boolean initialized; |
| private boolean needSkip; |
| private long startTime; |
| private long endTime; |
| |
| public TimeWindowManager( |
| ITimeRangeIterator timeRangeIterator, TimeWindowParameter timeWindowParameter) { |
| this.timeRangeIterator = timeRangeIterator; |
| this.initialized = false; |
| this.curWindow = new TimeWindow(this.timeRangeIterator.nextTimeRange()); |
| this.needOutputEndTime = timeWindowParameter.isNeedOutputEndTime(); |
| this.ascending = timeRangeIterator.isAscending(); |
| // At beginning, we do not need to skip inputTsBlock |
| this.needSkip = false; |
| } |
| |
| @Override |
| public boolean isCurWindowInit() { |
| return this.initialized; |
| } |
| |
| @Override |
| public void initCurWindow() { |
| this.initialized = true; |
| } |
| |
| @Override |
| public boolean hasNext(boolean hasMoreData) { |
| return this.curWindow.getCurTimeRange() != null || this.timeRangeIterator.hasNextTimeRange(); |
| } |
| |
| @Override |
| public void next() { |
| // When we go into next window, we should pay attention to previous window whether all points |
| // belong to previous window have been consumed. If not, we need skip these points. |
| this.needSkip = true; |
| this.initialized = false; |
| this.startTime = this.timeRangeIterator.currentOutputTime(); |
| this.endTime = this.curWindow.getCurMaxTime(); |
| this.curWindow.update(this.timeRangeIterator.nextTimeRange()); |
| } |
| |
| @Override |
| public IWindow getCurWindow() { |
| return curWindow; |
| } |
| |
| @Override |
| public TsBlock skipPointsOutOfCurWindow(TsBlock inputTsBlock) { |
| // If we do not need to skip, we return tsBlock directly |
| if (!this.needSkip || inputTsBlock == null || inputTsBlock.isEmpty()) { |
| return inputTsBlock; |
| } |
| |
| int positionCount = inputTsBlock.getPositionCount(); |
| // Used to mark the index we could skip to. |
| int skipIndex = 0; |
| // If current window overlaps with inputTsBlock, we can use bisection method to find the index |
| if (satisfiedCurWindow(inputTsBlock)) { |
| // If ascending, find the index of first greater than or equal to targetTime |
| // If !ascending, find the index of first less than or equal to targetTime |
| if ((ascending && inputTsBlock.getStartTime() < curWindow.getCurMinTime()) |
| || (!ascending && inputTsBlock.getStartTime() > curWindow.getCurMaxTime())) { |
| skipIndex = |
| TsBlockUtil.getFirstConditionIndex( |
| inputTsBlock, curWindow.getCurTimeRange(), ascending); |
| } |
| } else { |
| // Here, current window does not overlap with inputTsBlock. We could skip the whole |
| // inputTsBlock if the time range of inputTsBlock has been overdue compare to the time range |
| // of current window. |
| if ((ascending && inputTsBlock.getEndTime() < curWindow.getCurMinTime()) |
| || (!ascending && inputTsBlock.getEndTime() > curWindow.getCurMaxTime())) { |
| skipIndex = positionCount; |
| } |
| } |
| // This means that we have skipped all points before the time range of current window. |
| if (skipIndex < positionCount) { |
| needSkip = false; |
| } |
| return inputTsBlock.subTsBlock(skipIndex); |
| } |
| |
| @Override |
| public boolean satisfiedCurWindow(TsBlock inputTsBlock) { |
| return AggregationUtil.satisfiedTimeRange(inputTsBlock, curWindow.getCurTimeRange(), ascending); |
| } |
| |
| @Override |
| public boolean isTsBlockOutOfBound(TsBlock inputTsBlock) { |
| return inputTsBlock != null |
| && (this.ascending |
| ? inputTsBlock.getEndTime() > this.curWindow.getCurMaxTime() |
| : inputTsBlock.getEndTime() < this.curWindow.getCurMinTime()); |
| } |
| |
| @Override |
| public TsBlockBuilder createResultTsBlockBuilder(List<Aggregator> aggregators) { |
| List<TSDataType> dataTypes = getResultDataTypes(aggregators); |
| // Judge whether we need output endTime column. |
| if (this.needOutputEndTime) { |
| dataTypes.add(0, TSDataType.INT64); |
| } |
| return new TsBlockBuilder(dataTypes); |
| } |
| |
| @Override |
| public void appendAggregationResult( |
| TsBlockBuilder resultTsBlockBuilder, List<Aggregator> aggregators) { |
| outputAggregators( |
| aggregators, |
| resultTsBlockBuilder, |
| this.startTime, |
| this.needOutputEndTime ? this.endTime : -1); |
| } |
| |
| @Override |
| public boolean notInitializedLastTimeWindow() { |
| return !this.initialized; |
| } |
| |
| @Override |
| public boolean needSkipInAdvance() { |
| return false; |
| } |
| |
| @Override |
| public boolean isIgnoringNull() { |
| return true; |
| } |
| } |