| /* |
| * 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.aggregation; |
| |
| import org.apache.tsfile.block.column.Column; |
| import org.apache.tsfile.block.column.ColumnBuilder; |
| import org.apache.tsfile.enums.TSDataType; |
| import org.apache.tsfile.file.metadata.statistics.Statistics; |
| import org.apache.tsfile.utils.BitMap; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| public class MaxTimeAccumulator implements Accumulator { |
| |
| protected long maxTime = Long.MIN_VALUE; |
| protected boolean initResult = false; |
| |
| public MaxTimeAccumulator() {} |
| |
| // Column should be like: | Time | Value | |
| // Value is used to judge isNull() |
| @Override |
| public void addInput(Column[] columns, BitMap bitMap) { |
| int count = columns[0].getPositionCount(); |
| for (int i = 0; i < count; i++) { |
| if (bitMap != null && !bitMap.isMarked(i)) { |
| continue; |
| } |
| if (!columns[1].isNull(i)) { |
| updateMaxTime(columns[0].getLong(i)); |
| } |
| } |
| } |
| |
| // partialResult should be like: | partialMaxTimeValue | |
| @Override |
| public void addIntermediate(Column[] partialResult) { |
| checkArgument(partialResult.length == 1, "partialResult of MaxTime should be 1"); |
| if (partialResult[0].isNull(0)) { |
| return; |
| } |
| updateMaxTime(partialResult[0].getLong(0)); |
| } |
| |
| @Override |
| public void addStatistics(Statistics statistics) { |
| if (statistics == null) { |
| return; |
| } |
| updateMaxTime(statistics.getEndTime()); |
| } |
| |
| // finalResult should be single column, like: | finalMaxTime | |
| @Override |
| public void setFinal(Column finalResult) { |
| if (finalResult.isNull(0)) { |
| return; |
| } |
| initResult = true; |
| maxTime = finalResult.getLong(0); |
| } |
| |
| // columnBuilder should be single in maxTimeAccumulator |
| @Override |
| public void outputIntermediate(ColumnBuilder[] columnBuilders) { |
| checkArgument(columnBuilders.length == 1, "partialResult of MaxTime should be 1"); |
| if (!initResult) { |
| columnBuilders[0].appendNull(); |
| } else { |
| columnBuilders[0].writeLong(maxTime); |
| } |
| } |
| |
| @Override |
| public void outputFinal(ColumnBuilder columnBuilder) { |
| if (!initResult) { |
| columnBuilder.appendNull(); |
| } else { |
| columnBuilder.writeLong(maxTime); |
| } |
| } |
| |
| @Override |
| public void reset() { |
| initResult = false; |
| this.maxTime = Long.MIN_VALUE; |
| } |
| |
| @Override |
| public boolean hasFinalResult() { |
| return false; |
| } |
| |
| @Override |
| public TSDataType[] getIntermediateType() { |
| return new TSDataType[] {TSDataType.INT64}; |
| } |
| |
| @Override |
| public TSDataType getFinalType() { |
| return TSDataType.INT64; |
| } |
| |
| protected void updateMaxTime(long curTime) { |
| initResult = true; |
| maxTime = Math.max(maxTime, curTime); |
| } |
| } |