| /* |
| * 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.execution.operator.process; |
| |
| import org.apache.iotdb.db.queryengine.execution.operator.Operator; |
| import org.apache.iotdb.db.queryengine.execution.operator.OperatorContext; |
| import org.apache.iotdb.db.utils.columngenerator.ColumnGenerator; |
| import org.apache.iotdb.tsfile.read.common.block.TsBlock; |
| import org.apache.iotdb.tsfile.read.common.block.column.Column; |
| |
| import com.google.common.util.concurrent.ListenableFuture; |
| |
| /** |
| * This operator can be used to insert a column in TsBlock, the column is generated by |
| * StaticColumnGenerator which is decided when analyzing. |
| */ |
| public class ColumnInjectOperator implements ProcessOperator { |
| private final OperatorContext operatorContext; |
| private final Operator child; |
| private final int targetInjectIndex; |
| private final ColumnGenerator columnGenerator; |
| private final long maxExtraColumnSize; |
| |
| public ColumnInjectOperator( |
| OperatorContext operatorContext, |
| Operator childOperator, |
| ColumnGenerator columnGenerator, |
| int targetInjectIndex, |
| long maxExtraColumnSize) { |
| this.columnGenerator = columnGenerator; |
| this.operatorContext = operatorContext; |
| this.child = childOperator; |
| this.targetInjectIndex = targetInjectIndex; |
| this.maxExtraColumnSize = maxExtraColumnSize; |
| } |
| |
| @Override |
| public OperatorContext getOperatorContext() { |
| return operatorContext; |
| } |
| |
| @Override |
| public TsBlock next() throws Exception { |
| if (!child.hasNextWithTimer()) { |
| return null; |
| } |
| |
| TsBlock tsBlock = child.nextWithTimer(); |
| if (tsBlock == null) { |
| return null; |
| } |
| |
| Column[] columnsToBeInjected = columnGenerator.generate(tsBlock.getPositionCount()); |
| |
| // If targetIndex is the tail of array, we can use append() to improve performance |
| tsBlock = |
| targetInjectIndex == tsBlock.getValueColumnCount() |
| ? tsBlock.appendValueColumns(columnsToBeInjected) |
| : tsBlock.insertValueColumn(targetInjectIndex, columnsToBeInjected); |
| |
| return tsBlock; |
| } |
| |
| @Override |
| public boolean hasNext() throws Exception { |
| return child.hasNextWithTimer(); |
| } |
| |
| @Override |
| public boolean isFinished() throws Exception { |
| return !this.hasNextWithTimer(); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| child.close(); |
| } |
| |
| @Override |
| public ListenableFuture<?> isBlocked() { |
| return child.isBlocked(); |
| } |
| |
| @Override |
| public long calculateMaxPeekMemory() { |
| return child.calculateMaxPeekMemoryWithCounter() + maxExtraColumnSize; |
| } |
| |
| @Override |
| public long calculateMaxReturnSize() { |
| return maxExtraColumnSize + child.calculateMaxReturnSize(); |
| } |
| |
| @Override |
| public long calculateRetainedSizeAfterCallingNext() { |
| return child.calculateRetainedSizeAfterCallingNext(); |
| } |
| } |