| /* |
| * 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.column.unary.scalar; |
| |
| import org.apache.iotdb.db.queryengine.transformation.dag.column.ColumnTransformer; |
| import org.apache.iotdb.db.queryengine.transformation.dag.column.unary.UnaryColumnTransformer; |
| import org.apache.iotdb.tsfile.read.common.block.column.Column; |
| import org.apache.iotdb.tsfile.read.common.block.column.ColumnBuilder; |
| import org.apache.iotdb.tsfile.read.common.type.Type; |
| import org.apache.iotdb.tsfile.read.common.type.TypeEnum; |
| |
| public class RoundFunctionColumnTransformer extends UnaryColumnTransformer { |
| |
| protected int places; |
| |
| public RoundFunctionColumnTransformer( |
| Type returnType, ColumnTransformer childColumnTransformer, int places) { |
| super(returnType, childColumnTransformer); |
| this.places = places; |
| } |
| |
| @Override |
| protected void doTransform(Column column, ColumnBuilder columnBuilder) { |
| TypeEnum sourceType = childColumnTransformer.getType().getTypeEnum(); |
| for (int i = 0, n = column.getPositionCount(); i < n; i++) { |
| if (!column.isNull(i)) { |
| switch (sourceType) { |
| case INT32: |
| columnBuilder.writeDouble( |
| Math.rint(column.getInt(i) * Math.pow(10, places)) / Math.pow(10, places)); |
| break; |
| case INT64: |
| columnBuilder.writeDouble( |
| Math.rint(column.getLong(i) * Math.pow(10, places)) / Math.pow(10, places)); |
| break; |
| case FLOAT: |
| columnBuilder.writeDouble( |
| Math.rint(column.getFloat(i) * Math.pow(10, places)) / Math.pow(10, places)); |
| break; |
| case DOUBLE: |
| columnBuilder.writeDouble( |
| Math.rint(column.getDouble(i) * Math.pow(10, places)) / Math.pow(10, places)); |
| break; |
| default: |
| throw new UnsupportedOperationException( |
| String.format( |
| "Unsupported source dataType: %s", |
| childColumnTransformer.getType().getTypeEnum())); |
| } |
| } else { |
| columnBuilder.appendNull(); |
| } |
| } |
| } |
| } |