| /* |
| * 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.transformation.dag.transformer.unary.scalar; |
| |
| import org.apache.iotdb.db.exception.query.QueryProcessException; |
| import org.apache.iotdb.db.queryengine.transformation.api.LayerPointReader; |
| import org.apache.iotdb.db.queryengine.transformation.dag.transformer.unary.UnaryTransformer; |
| |
| import org.apache.tsfile.enums.TSDataType; |
| |
| import java.io.IOException; |
| |
| public class RoundFunctionTransformer extends UnaryTransformer { |
| private final TSDataType targetDataType; |
| |
| protected int places; |
| |
| public RoundFunctionTransformer( |
| LayerPointReader layerPointReader, TSDataType targetDataType, int places) { |
| super(layerPointReader); |
| this.targetDataType = targetDataType; |
| this.places = places; |
| } |
| |
| @Override |
| public TSDataType getDataType() { |
| return targetDataType; |
| } |
| |
| @Override |
| protected void transformAndCache() throws QueryProcessException, IOException { |
| switch (layerPointReaderDataType) { |
| case INT32: |
| cachedDouble = |
| Math.rint(layerPointReader.currentInt() * Math.pow(10, places)) / Math.pow(10, places); |
| return; |
| case INT64: |
| cachedDouble = |
| Math.rint(layerPointReader.currentLong() * Math.pow(10, places)) / Math.pow(10, places); |
| return; |
| case FLOAT: |
| cachedDouble = |
| Math.rint(layerPointReader.currentFloat() * Math.pow(10, places)) |
| / Math.pow(10, places); |
| return; |
| case DOUBLE: |
| cachedDouble = |
| Math.rint(layerPointReader.currentDouble() * Math.pow(10, places)) |
| / Math.pow(10, places); |
| return; |
| default: |
| throw new UnsupportedOperationException( |
| String.format("Unsupported source dataType: %s", layerPointReaderDataType)); |
| } |
| } |
| } |