| /** |
| * 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.hadoop.mapreduce.lib.input; |
| |
| import java.io.IOException; |
| import java.util.List; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| |
| import org.apache.hadoop.io.SequenceFile; |
| import org.apache.hadoop.io.MapFile; |
| import org.apache.hadoop.mapreduce.InputFormat; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.hadoop.mapreduce.JobContext; |
| import org.apache.hadoop.mapreduce.RecordReader; |
| import org.apache.hadoop.mapreduce.TaskAttemptContext; |
| |
| /** An {@link InputFormat} for {@link SequenceFile}s. */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class SequenceFileInputFormat<K, V> extends FileInputFormat<K, V> { |
| |
| @Override |
| public RecordReader<K, V> createRecordReader(InputSplit split, |
| TaskAttemptContext context |
| ) throws IOException { |
| return new SequenceFileRecordReader<K,V>(); |
| } |
| |
| @Override |
| protected long getFormatMinSplitSize() { |
| return SequenceFile.SYNC_INTERVAL; |
| } |
| |
| @Override |
| protected List<FileStatus> listStatus(JobContext job |
| )throws IOException { |
| |
| List<FileStatus> files = super.listStatus(job); |
| int len = files.size(); |
| for(int i=0; i < len; ++i) { |
| FileStatus file = files.get(i); |
| if (file.isDirectory()) { // it's a MapFile |
| Path p = file.getPath(); |
| FileSystem fs = p.getFileSystem(job.getConfiguration()); |
| // use the data file |
| files.set(i, fs.getFileStatus(new Path(p, MapFile.DATA_FILE_NAME))); |
| } |
| } |
| return files; |
| } |
| } |
| |