| /* |
| * 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.pipe.processor.aggregate.operator.intermediateresult.specifictype.doubletype; |
| |
| import org.apache.iotdb.db.pipe.processor.aggregate.operator.intermediateresult.IntermediateResultOperator; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.utils.Pair; |
| import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.Map; |
| |
| public class FractionPoweredSumOperator implements IntermediateResultOperator { |
| private double sum; |
| private final transient double power; |
| |
| /** |
| * Warning: Do not use fraction values like "1/3" to initiate the operator, unless you know what |
| * the output is when printing the double power. For instance, use "0.3333" instead, and you can |
| * identify the operator's name as "sum_x0.3333". |
| * |
| * @param power the power to use |
| */ |
| public FractionPoweredSumOperator(double power) { |
| this.power = power; |
| } |
| |
| @Override |
| public String getName() { |
| return "sum_x" + power; |
| } |
| |
| @Override |
| public void configureSystemParameters(Map<String, String> systemParams) { |
| // Do nothing |
| } |
| |
| @Override |
| public boolean initAndGetIsSupport(boolean initialInput, long initialTimestamp) { |
| return false; |
| } |
| |
| @Override |
| public boolean initAndGetIsSupport(int initialInput, long initialTimestamp) { |
| sum = Math.pow(initialInput, power); |
| return true; |
| } |
| |
| @Override |
| public boolean initAndGetIsSupport(long initialInput, long initialTimestamp) { |
| sum = Math.pow(initialInput, power); |
| return true; |
| } |
| |
| @Override |
| public boolean initAndGetIsSupport(float initialInput, long initialTimestamp) { |
| sum = Math.pow(initialInput, power); |
| return true; |
| } |
| |
| @Override |
| public boolean initAndGetIsSupport(double initialInput, long initialTimestamp) { |
| sum = Math.pow(initialInput, power); |
| return true; |
| } |
| |
| @Override |
| public boolean initAndGetIsSupport(String initialInput, long initialTimestamp) { |
| return false; |
| } |
| |
| @Override |
| public void updateValue(boolean input, long timestamp) { |
| throw new UnsupportedOperationException( |
| "FractionPoweredSumOperator does not support boolean input"); |
| } |
| |
| @Override |
| public void updateValue(int input, long timestamp) { |
| sum += Math.pow(input, power); |
| } |
| |
| @Override |
| public void updateValue(long input, long timestamp) { |
| sum += Math.pow(input, power); |
| } |
| |
| @Override |
| public void updateValue(float input, long timestamp) { |
| sum += Math.pow(input, power); |
| } |
| |
| @Override |
| public void updateValue(double input, long timestamp) { |
| sum += Math.pow(input, power); |
| } |
| |
| @Override |
| public void updateValue(String input, long timestamp) { |
| throw new UnsupportedOperationException( |
| "FractionPoweredSumOperator does not support string input"); |
| } |
| |
| @Override |
| public Pair<TSDataType, Object> getResult() { |
| return new Pair<>(TSDataType.DOUBLE, sum); |
| } |
| |
| @Override |
| public void serialize(DataOutputStream outputStream) throws IOException { |
| ReadWriteIOUtils.write(sum, outputStream); |
| } |
| |
| @Override |
| public void deserialize(ByteBuffer byteBuffer) throws IOException { |
| sum = ReadWriteIOUtils.readDouble(byteBuffer); |
| } |
| } |