| /* |
| * 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.tsfile.read; |
| |
| import org.apache.iotdb.tsfile.file.metadata.AlignedChunkMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.ChunkMetadata; |
| import org.apache.iotdb.tsfile.file.metadata.IChunkMetadata; |
| import org.apache.iotdb.tsfile.read.common.Chunk; |
| import org.apache.iotdb.tsfile.read.reader.chunk.AlignedChunkReader; |
| import org.apache.iotdb.tsfile.write.schema.IMeasurementSchema; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * This class return the AlignedChunkReader iteratively, each AlignedChunkReader reads one aligned |
| * chunk group in a tsfile. |
| */ |
| public class TsFileAlignedSeriesReaderIterator { |
| |
| private TsFileSequenceReader reader; |
| private List<AlignedChunkMetadata> alignedChunkMetadataList; |
| private List<IMeasurementSchema> schemaList; |
| |
| private int curIdx = -1; |
| |
| public TsFileAlignedSeriesReaderIterator( |
| TsFileSequenceReader reader, |
| List<AlignedChunkMetadata> alignedChunkMetadataList, |
| List<IMeasurementSchema> schemaList) { |
| this.reader = reader; |
| this.alignedChunkMetadataList = alignedChunkMetadataList; |
| this.schemaList = schemaList; |
| } |
| |
| public boolean hasNext() { |
| return curIdx < alignedChunkMetadataList.size() - 1; |
| } |
| |
| public NextAlignedChunkInfo nextReader() throws IOException { |
| AlignedChunkMetadata alignedChunkMetadata = alignedChunkMetadataList.get(++curIdx); |
| IChunkMetadata timeChunkMetadata = alignedChunkMetadata.getTimeChunkMetadata(); |
| List<IChunkMetadata> valueChunkMetadataList = alignedChunkMetadata.getValueChunkMetadataList(); |
| int schemaIdx = 0; |
| Chunk timeChunk = reader.readMemChunk((ChunkMetadata) timeChunkMetadata); |
| Chunk[] valueChunks = new Chunk[schemaList.size()]; |
| long totalSize = 0; |
| long totalPointNum = 0; |
| int notNullChunkNum = 0; |
| for (IChunkMetadata valueChunkMetadata : valueChunkMetadataList) { |
| if (valueChunkMetadata == null) { |
| continue; |
| } |
| while (!valueChunkMetadata |
| .getMeasurementUid() |
| .equals(schemaList.get(schemaIdx).getMeasurementId())) { |
| schemaIdx++; |
| } |
| Chunk chunk = reader.readMemChunk((ChunkMetadata) valueChunkMetadata); |
| valueChunks[schemaIdx++] = chunk; |
| notNullChunkNum++; |
| totalPointNum += ((ChunkMetadata) valueChunkMetadata).getNumOfPoints(); |
| totalSize += chunk.getHeader().getSerializedSize() + chunk.getHeader().getDataSize(); |
| } |
| |
| AlignedChunkReader chunkReader = new AlignedChunkReader(timeChunk, Arrays.asList(valueChunks)); |
| |
| return new NextAlignedChunkInfo(chunkReader, totalSize, notNullChunkNum, totalPointNum); |
| } |
| |
| public class NextAlignedChunkInfo { |
| private AlignedChunkReader reader; |
| private long totalSize; |
| private int notNullChunkNum; |
| private long totalPointNum; |
| |
| public NextAlignedChunkInfo( |
| AlignedChunkReader reader, long totalSize, int notNullChunkNum, long totalPointNum) { |
| this.reader = reader; |
| this.totalSize = totalSize; |
| this.notNullChunkNum = notNullChunkNum; |
| this.totalPointNum = totalPointNum; |
| } |
| |
| public AlignedChunkReader getReader() { |
| return reader; |
| } |
| |
| public long getTotalSize() { |
| return totalSize; |
| } |
| |
| public long getTotalPointNum() { |
| return totalPointNum; |
| } |
| |
| public int getNotNullChunkNum() { |
| return notNullChunkNum; |
| } |
| } |
| } |