| /* |
| * 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.fill; |
| |
| import org.apache.iotdb.tsfile.read.common.block.column.Column; |
| import org.apache.iotdb.tsfile.read.common.block.column.TimeColumn; |
| |
| public interface ILinearFill { |
| |
| /** |
| * Before we call this method, we need to make sure the nextValue has been prepared or noMoreNext |
| * has been set to true. |
| * |
| * @param timeColumn TimeColumn of valueColumn |
| * @param valueColumn valueColumn that need to be filled |
| * @param currentRowIndex current row index for start time in timeColumn |
| * @return Value Column that has been filled |
| */ |
| Column fill(TimeColumn timeColumn, Column valueColumn, long currentRowIndex); |
| |
| /** |
| * Whether need prepare for next. |
| * |
| * @param rowIndex row index for end time of current valueColumn that need to be filled |
| * @param valueColumn valueColumn that need to be filled |
| * @return true if valueColumn can't be filled using current information, and we need to get next |
| * TsBlock and then call prepareForNext. false if valueColumn can be filled using current |
| * information, and we can directly call fill() function |
| */ |
| boolean needPrepareForNext(long rowIndex, Column valueColumn); |
| |
| /** |
| * prepare for next. |
| * |
| * @param startRowIndex row index for start time of nextValueColumn |
| * @param endRowIndex row index for end time of current valueColumn that need to be filled |
| * @param nextTimeColumn TimeColumn of next TsBlock |
| * @param nextValueColumn Value Column of next TsBlock |
| * @return true if we get enough information to fill current column, and we can stop getting next |
| * TsBlock and calling prepareForNext. false if we still don't get enough information to fill |
| * current column, and still need to keep getting next TsBlock and then call prepareForNext |
| */ |
| boolean prepareForNext( |
| long startRowIndex, long endRowIndex, TimeColumn nextTimeColumn, Column nextValueColumn); |
| } |