| /* |
| * 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.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.column.Column; |
| import org.apache.iotdb.tsfile.read.common.block.column.TimeColumn; |
| |
| import java.util.List; |
| |
| public class CountWindowManager implements IWindowManager { |
| |
| private final CountWindow countWindow; |
| |
| private boolean needSkip; |
| private boolean initialized; |
| |
| public CountWindowManager(CountWindowParameter countWindowParameter) { |
| this.countWindow = new CountWindow(countWindowParameter); |
| this.needSkip = false; |
| } |
| |
| @Override |
| public boolean isCurWindowInit() { |
| return this.initialized; |
| } |
| |
| @Override |
| public void initCurWindow() { |
| this.initialized = true; |
| countWindow.resetCurCount(); |
| countWindow.setStartTime(Long.MAX_VALUE); |
| countWindow.setEndTime(Long.MIN_VALUE); |
| } |
| |
| @Override |
| public boolean hasNext(boolean hasMoreData) { |
| return hasMoreData; |
| } |
| |
| @Override |
| public void next() { |
| this.needSkip = true; |
| this.initialized = false; |
| } |
| |
| @Override |
| public IWindow getCurWindow() { |
| return countWindow; |
| } |
| |
| @Override |
| public TsBlock skipPointsOutOfCurWindow(TsBlock inputTsBlock) { |
| if (!needSkip) { |
| return inputTsBlock; |
| } |
| |
| if (inputTsBlock == null || inputTsBlock.isEmpty()) { |
| return inputTsBlock; |
| } |
| |
| TimeColumn timeColumn = inputTsBlock.getTimeColumn(); |
| Column controlColumn = countWindow.getControlColumn(inputTsBlock); |
| long leftCount = countWindow.getLeftCount(); |
| int i = 0; |
| int size = inputTsBlock.getPositionCount(); |
| |
| for (; i < size && leftCount != 0; i++) { |
| |
| if (isIgnoringNull() && controlColumn.isNull(i)) { |
| continue; |
| } else { |
| // A Count Window has exactly the row number of countNumber |
| // if leftCount is zero, the window is finished. |
| leftCount--; |
| } |
| |
| long currentTime = timeColumn.getLong(i); |
| // judge whether we need update endTime |
| if (countWindow.getStartTime() > currentTime) { |
| countWindow.setStartTime(currentTime); |
| } |
| // judge whether we need update endTime |
| if (countWindow.getEndTime() < currentTime) { |
| countWindow.setEndTime(currentTime); |
| } |
| } |
| |
| countWindow.setLeftCount(leftCount); |
| |
| // we can create a new window beginning at index i of inputTsBlock |
| if (i < size) { |
| needSkip = false; |
| } |
| return inputTsBlock.subTsBlock(i); |
| } |
| |
| @Override |
| public TsBlockBuilder createResultTsBlockBuilder(List<Aggregator> aggregators) { |
| List<TSDataType> dataTypes = getResultDataTypes(aggregators); |
| // Judge whether we need output endTime column. |
| if (countWindow.isNeedOutputEndTime()) { |
| dataTypes.add(0, TSDataType.INT64); |
| } |
| return new TsBlockBuilder(dataTypes); |
| } |
| |
| @Override |
| public void appendAggregationResult( |
| TsBlockBuilder resultTsBlockBuilder, List<Aggregator> aggregators) { |
| if (countWindow.getLeftCount() != 0) { |
| return; |
| } |
| long endTime = countWindow.isNeedOutputEndTime() ? countWindow.getEndTime() : -1; |
| outputAggregators(aggregators, resultTsBlockBuilder, countWindow.getStartTime(), endTime); |
| } |
| |
| @Override |
| public boolean needSkipInAdvance() { |
| return true; |
| } |
| |
| @Override |
| public boolean isIgnoringNull() { |
| return countWindow.isIgnoreNull(); |
| } |
| } |