| /* |
| * 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.common.conf.TSFileConfig; |
| import org.apache.iotdb.tsfile.exception.filter.StatisticsClassException; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.utils.Binary; |
| 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; |
| |
| import static org.apache.iotdb.tsfile.utils.RamUsageEstimator.sizeOfCharArray; |
| |
| /** Statistics for string type. */ |
| public class BinaryStatistics extends Statistics<Binary> { |
| |
| public static final long INSTANCE_SIZE = |
| RamUsageEstimator.shallowSizeOfInstance(BinaryStatistics.class) |
| + 2 * RamUsageEstimator.shallowSizeOfInstance(Binary.class); |
| |
| private static final Binary EMPTY_VALUE = new Binary("", TSFileConfig.STRING_CHARSET); |
| |
| private Binary firstValue = EMPTY_VALUE; |
| private Binary lastValue = EMPTY_VALUE; |
| |
| @Override |
| public TSDataType getType() { |
| return TSDataType.TEXT; |
| } |
| |
| /** The output of this method should be identical to the method "serializeStats(outputStream)". */ |
| @Override |
| public int getStatsSize() { |
| return 4 + firstValue.getValues().length + 4 + lastValue.getValues().length; |
| } |
| |
| @Override |
| public long getRetainedSizeInBytes() { |
| return INSTANCE_SIZE |
| + sizeOfCharArray(firstValue.getLength()) |
| + sizeOfCharArray(lastValue.getLength()); |
| } |
| |
| /** |
| * initialize Statistics. |
| * |
| * @param first the first value |
| * @param last the last value |
| */ |
| public void initializeStats(Binary first, Binary last) { |
| this.firstValue = first; |
| this.lastValue = last; |
| } |
| |
| private void updateLastStats(Binary lastValue) { |
| this.lastValue = lastValue; |
| } |
| |
| private void updateStats(Binary firstValue, Binary lastValue, long startTime, long endTime) { |
| // 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 |
| public Binary getMinValue() { |
| throw new StatisticsClassException( |
| String.format(STATS_UNSUPPORTED_MSG, TSDataType.TEXT, "min")); |
| } |
| |
| @Override |
| public Binary getMaxValue() { |
| throw new StatisticsClassException( |
| String.format(STATS_UNSUPPORTED_MSG, TSDataType.TEXT, "max")); |
| } |
| |
| @Override |
| public Binary getFirstValue() { |
| return firstValue; |
| } |
| |
| @Override |
| public Binary getLastValue() { |
| return lastValue; |
| } |
| |
| @Override |
| public double getSumDoubleValue() { |
| throw new StatisticsClassException( |
| String.format(STATS_UNSUPPORTED_MSG, TSDataType.TEXT, "double sum")); |
| } |
| |
| @Override |
| public long getSumLongValue() { |
| throw new StatisticsClassException( |
| String.format(STATS_UNSUPPORTED_MSG, TSDataType.TEXT, "long sum")); |
| } |
| |
| @Override |
| protected void mergeStatisticsValue(Statistics<Binary> stats) { |
| BinaryStatistics stringStats = (BinaryStatistics) stats; |
| if (isEmpty) { |
| initializeStats(stringStats.getFirstValue(), stringStats.getLastValue()); |
| isEmpty = false; |
| } else { |
| updateStats( |
| stringStats.getFirstValue(), |
| stringStats.getLastValue(), |
| stats.getStartTime(), |
| stats.getEndTime()); |
| } |
| } |
| |
| @Override |
| void updateStats(Binary value) { |
| if (isEmpty) { |
| initializeStats(value, value); |
| isEmpty = false; |
| } else { |
| updateLastStats(value); |
| } |
| } |
| |
| @Override |
| void updateStats(Binary[] values, int batchSize) { |
| for (int i = 0; i < batchSize; i++) { |
| updateStats(values[i]); |
| } |
| } |
| |
| @Override |
| public int serializeStats(OutputStream outputStream) throws IOException { |
| int byteLen = 0; |
| byteLen += ReadWriteIOUtils.write(firstValue, outputStream); |
| byteLen += ReadWriteIOUtils.write(lastValue, outputStream); |
| return byteLen; |
| } |
| |
| @Override |
| public void deserialize(InputStream inputStream) throws IOException { |
| this.firstValue = ReadWriteIOUtils.readBinary(inputStream); |
| this.lastValue = ReadWriteIOUtils.readBinary(inputStream); |
| } |
| |
| @Override |
| public void deserialize(ByteBuffer byteBuffer) { |
| this.firstValue = ReadWriteIOUtils.readBinary(byteBuffer); |
| this.lastValue = ReadWriteIOUtils.readBinary(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; |
| } |
| BinaryStatistics that = (BinaryStatistics) o; |
| return Objects.equals(firstValue, that.firstValue) && Objects.equals(lastValue, that.lastValue); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(super.hashCode(), firstValue, lastValue); |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString() + " [firstValue:" + firstValue + ",lastValue:" + lastValue + "]"; |
| } |
| } |