| /* |
| * 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.schema; |
| |
| import org.apache.iotdb.tsfile.common.conf.TSFileDescriptor; |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.read.common.block.TsBlock; |
| import org.apache.iotdb.tsfile.read.common.block.TsBlockBuilder; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.function.BiConsumer; |
| |
| public class SchemaTsBlockUtil { |
| private static final long MAX_SIZE = |
| TSFileDescriptor.getInstance().getConfig().getMaxTsBlockSizeInBytes(); |
| |
| private SchemaTsBlockUtil() { |
| // Util class |
| } |
| |
| public static <T> List<TsBlock> transferSchemaResultToTsBlockList( |
| Iterator<T> schemaRegionResultIterator, |
| List<TSDataType> outputDataTypes, |
| BiConsumer<T, TsBlockBuilder> consumer) { |
| List<TsBlock> result = new ArrayList<>(); |
| TsBlockBuilder tsBlockBuilder = new TsBlockBuilder(outputDataTypes); |
| T schemaRegionResultElement; |
| while (schemaRegionResultIterator.hasNext()) { |
| schemaRegionResultElement = schemaRegionResultIterator.next(); |
| consumer.accept(schemaRegionResultElement, tsBlockBuilder); |
| if (tsBlockBuilder.getRetainedSizeInBytes() >= MAX_SIZE) { |
| result.add(tsBlockBuilder.build()); |
| tsBlockBuilder = new TsBlockBuilder(outputDataTypes); |
| } |
| } |
| if (!tsBlockBuilder.isEmpty()) { |
| result.add(tsBlockBuilder.build()); |
| } |
| return result; |
| } |
| } |