| /* |
| * 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.file.metadata.statistics; |
| |
| import org.apache.iotdb.tsfile.exception.filter.StatisticsClassException; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.utils.RamUsageEstimator; |
| import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.nio.ByteBuffer; |
| import java.util.Objects; |
| |
| public class DoubleStatistics extends Statistics<Double> { |
| |
| public static final long INSTANCE_SIZE = |
| RamUsageEstimator.shallowSizeOfInstance(DoubleStatistics.class); |
| |
| private double minValue; |
| private double maxValue; |
| private double firstValue; |
| private double lastValue; |
| private double sumValue; |
| |
| @Override |
| public TSDataType getType() { |
| return TSDataType.DOUBLE; |
| } |
| |
| /** The output of this method should be identical to the method "serializeStats(outputStream)". */ |
| @Override |
| public int getStatsSize() { |
| return 40; |
| } |
| |
| @Override |
| public long getRetainedSizeInBytes() { |
| return INSTANCE_SIZE; |
| } |
| |
| /** |
| * initialize double statistics. |
| * |
| * @param min min value |
| * @param max max value |
| * @param first the first value |
| * @param last the last value |
| * @param sum sum value |
| */ |
| public void initializeStats(double min, double max, double first, double last, double sum) { |
| this.minValue = min; |
| this.maxValue = max; |
| this.firstValue = first; |
| this.lastValue = last; |
| this.sumValue = sum; |
| } |
| |
| private void updateStats(double minValue, double maxValue, double lastValue, double sumValue) { |
| if (minValue < this.minValue) { |
| this.minValue = minValue; |
| } |
| if (maxValue > this.maxValue) { |
| this.maxValue = maxValue; |
| } |
| this.sumValue += sumValue; |
| this.lastValue = lastValue; |
| } |
| |
| private void updateStats( |
| double minValue, |
| double maxValue, |
| double firstValue, |
| double lastValue, |
| double sumValue, |
| long startTime, |
| long endTime) { |
| if (minValue < this.minValue) { |
| this.minValue = minValue; |
| } |
| if (maxValue > this.maxValue) { |
| this.maxValue = maxValue; |
| } |
| this.sumValue += sumValue; |
| // only if endTime greater or equals to the current endTime need we update the last value |
| // only if startTime less or equals to the current startTime need we update the first value |
| // otherwise, just ignore |
| if (startTime <= this.getStartTime()) { |
| this.firstValue = firstValue; |
| } |
| if (endTime >= this.getEndTime()) { |
| this.lastValue = lastValue; |
| } |
| } |
| |
| @Override |
| void updateStats(double value) { |
| if (this.isEmpty) { |
| initializeStats(value, value, value, value, value); |
| isEmpty = false; |
| } else { |
| updateStats(value, value, value, value); |
| } |
| } |
| |
| @Override |
| void updateStats(double[] values, int batchSize) { |
| for (int i = 0; i < batchSize; i++) { |
| updateStats(values[i]); |
| } |
| } |
| |
| @Override |
| public Double getMinValue() { |
| return minValue; |
| } |
| |
| @Override |
| public Double getMaxValue() { |
| return maxValue; |
| } |
| |
| @Override |
| public Double getFirstValue() { |
| return firstValue; |
| } |
| |
| @Override |
| public Double getLastValue() { |
| return lastValue; |
| } |
| |
| @Override |
| public double getSumDoubleValue() { |
| return sumValue; |
| } |
| |
| @Override |
| public long getSumLongValue() { |
| throw new StatisticsClassException( |
| String.format(STATS_UNSUPPORTED_MSG, TSDataType.DOUBLE, "long sum")); |
| } |
| |
| @Override |
| protected void mergeStatisticsValue(Statistics<Double> stats) { |
| DoubleStatistics doubleStats = (DoubleStatistics) stats; |
| if (this.isEmpty) { |
| initializeStats( |
| doubleStats.getMinValue(), |
| doubleStats.getMaxValue(), |
| doubleStats.getFirstValue(), |
| doubleStats.getLastValue(), |
| doubleStats.sumValue); |
| isEmpty = false; |
| } else { |
| updateStats( |
| doubleStats.getMinValue(), |
| doubleStats.getMaxValue(), |
| doubleStats.getFirstValue(), |
| doubleStats.getLastValue(), |
| doubleStats.sumValue, |
| stats.getStartTime(), |
| stats.getEndTime()); |
| } |
| } |
| |
| @Override |
| public int serializeStats(OutputStream outputStream) throws IOException { |
| int byteLen = 0; |
| byteLen += ReadWriteIOUtils.write(minValue, outputStream); |
| byteLen += ReadWriteIOUtils.write(maxValue, outputStream); |
| byteLen += ReadWriteIOUtils.write(firstValue, outputStream); |
| byteLen += ReadWriteIOUtils.write(lastValue, outputStream); |
| byteLen += ReadWriteIOUtils.write(sumValue, outputStream); |
| return byteLen; |
| } |
| |
| @Override |
| public void deserialize(InputStream inputStream) throws IOException { |
| this.minValue = ReadWriteIOUtils.readDouble(inputStream); |
| this.maxValue = ReadWriteIOUtils.readDouble(inputStream); |
| this.firstValue = ReadWriteIOUtils.readDouble(inputStream); |
| this.lastValue = ReadWriteIOUtils.readDouble(inputStream); |
| this.sumValue = ReadWriteIOUtils.readDouble(inputStream); |
| } |
| |
| @Override |
| public void deserialize(ByteBuffer byteBuffer) { |
| this.minValue = ReadWriteIOUtils.readDouble(byteBuffer); |
| this.maxValue = ReadWriteIOUtils.readDouble(byteBuffer); |
| this.firstValue = ReadWriteIOUtils.readDouble(byteBuffer); |
| this.lastValue = ReadWriteIOUtils.readDouble(byteBuffer); |
| this.sumValue = ReadWriteIOUtils.readDouble(byteBuffer); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| if (!super.equals(o)) { |
| return false; |
| } |
| double e = 0.00001; |
| DoubleStatistics that = (DoubleStatistics) o; |
| return Math.abs(that.minValue - minValue) < e |
| && Math.abs(that.maxValue - maxValue) < e |
| && Math.abs(that.firstValue - firstValue) < e |
| && Math.abs(that.lastValue - lastValue) < e |
| && Math.abs(that.sumValue - sumValue) < e; |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(super.hashCode(), minValue, maxValue, firstValue, lastValue, sumValue); |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString() |
| + " [minValue:" |
| + minValue |
| + ",maxValue:" |
| + maxValue |
| + ",firstValue:" |
| + firstValue |
| + ",lastValue:" |
| + lastValue |
| + ",sumValue:" |
| + sumValue |
| + "]"; |
| } |
| } |