| /* |
| * 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.plan.planner.plan.parameter; |
| |
| import org.apache.iotdb.tsfile.utils.ReadWriteIOUtils; |
| |
| import com.google.common.collect.ImmutableList; |
| |
| import java.nio.ByteBuffer; |
| import java.util.List; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| public class OutputColumn { |
| |
| // indicate this output column should use which value column of which input TsBlock |
| // if overlapped is false, the order in sourceLocations should be in ascending timestamp order |
| private final List<InputLocation> sourceLocations; |
| |
| // if overlapped is true, it means that sourceLocations.size() > 1 and input locations in |
| // sourceLocations are overlapped |
| // it will only happen when we do the load balance and more than one DataRegion is assigned to one |
| // time partition |
| private final boolean overlapped; |
| |
| /** used for case that this OutputColumn only has one input column */ |
| public OutputColumn(InputLocation inputLocation) { |
| this.sourceLocations = ImmutableList.of(inputLocation); |
| this.overlapped = false; |
| } |
| |
| public OutputColumn(List<InputLocation> sourceLocations, boolean overlapped) { |
| checkArgument( |
| sourceLocations != null && !sourceLocations.isEmpty(), |
| "size of sourceLocations should be larger than 0"); |
| this.sourceLocations = sourceLocations; |
| this.overlapped = overlapped; |
| } |
| |
| public List<InputLocation> getSourceLocations() { |
| return sourceLocations; |
| } |
| |
| public boolean isOverlapped() { |
| return overlapped; |
| } |
| |
| public boolean isSingleInputColumn() { |
| return sourceLocations.size() == 1; |
| } |
| |
| public InputLocation getSourceLocation(int index) { |
| checkArgument(index < sourceLocations.size(), "index is not valid"); |
| return sourceLocations.get(index); |
| } |
| |
| public void serialize(ByteBuffer byteBuffer) { |
| ReadWriteIOUtils.write(sourceLocations.size(), byteBuffer); |
| for (InputLocation sourceLocation : sourceLocations) { |
| sourceLocation.serialize(byteBuffer); |
| } |
| ReadWriteIOUtils.write(overlapped, byteBuffer); |
| } |
| |
| public static OutputColumn deserialize(ByteBuffer byteBuffer) { |
| int sourceLocationSize = ReadWriteIOUtils.readInt(byteBuffer); |
| ImmutableList.Builder<InputLocation> sourceLocations = ImmutableList.builder(); |
| while (sourceLocationSize > 0) { |
| sourceLocations.add(InputLocation.deserialize(byteBuffer)); |
| sourceLocationSize--; |
| } |
| boolean overlapped = ReadWriteIOUtils.readBool(byteBuffer); |
| return new OutputColumn(sourceLocations.build(), overlapped); |
| } |
| } |