| /* |
| * 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.seatunnel.connectors.seatunnel.iceberg.source.reader; |
| |
| import org.apache.seatunnel.api.table.type.SeaTunnelRow; |
| import org.apache.seatunnel.connectors.seatunnel.iceberg.data.Deserializer; |
| import org.apache.seatunnel.connectors.seatunnel.iceberg.source.split.IcebergFileScanTaskSplit; |
| |
| import lombok.AllArgsConstructor; |
| import lombok.NonNull; |
| import org.apache.iceberg.data.Record; |
| import org.apache.iceberg.io.CloseableIterator; |
| |
| import java.io.Closeable; |
| import java.io.IOException; |
| |
| @AllArgsConstructor |
| public class IcebergFileScanTaskSplitReader implements Closeable { |
| |
| private Deserializer deserializer; |
| private IcebergFileScanTaskReader icebergFileScanTaskReader; |
| |
| public CloseableIterator<SeaTunnelRow> open(@NonNull IcebergFileScanTaskSplit split) { |
| CloseableIterator<Record> iterator = icebergFileScanTaskReader.open(split.getTask()); |
| |
| OffsetSeekIterator<Record> seekIterator = new OffsetSeekIterator(iterator); |
| seekIterator.seek(split.getRecordOffset()); |
| |
| return CloseableIterator.transform(seekIterator, record -> { |
| SeaTunnelRow seaTunnelRow = deserializer.deserialize(record); |
| split.setRecordOffset(split.getRecordOffset() + 1); |
| return seaTunnelRow; |
| }); |
| } |
| |
| @Override |
| public void close() { |
| icebergFileScanTaskReader.close(); |
| } |
| |
| @AllArgsConstructor |
| private static class OffsetSeekIterator<T> implements CloseableIterator<T> { |
| private final CloseableIterator<T> iterator; |
| |
| public void seek(long startingRecordOffset) { |
| for (long i = 0; i < startingRecordOffset; ++i) { |
| if (hasNext()) { |
| next(); |
| } else { |
| throw new IllegalStateException(String.format( |
| "Invalid starting record offset %d", startingRecordOffset)); |
| } |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| iterator.close(); |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return iterator.hasNext(); |
| } |
| |
| @Override |
| public T next() { |
| return iterator.next(); |
| } |
| } |
| } |