001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *     http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package org.apache.hadoop.mapred;
020    
021    import java.io.IOException;
022    
023    import org.apache.hadoop.classification.InterfaceAudience;
024    import org.apache.hadoop.classification.InterfaceStability;
025    import org.apache.hadoop.fs.FileStatus;
026    import org.apache.hadoop.fs.FileSystem;
027    import org.apache.hadoop.fs.Path;
028    
029    import org.apache.hadoop.io.SequenceFile;
030    import org.apache.hadoop.io.MapFile;
031    
032    /** An {@link InputFormat} for {@link SequenceFile}s. 
033     * @deprecated Use 
034     *  {@link org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat} 
035     *  instead.
036     */
037    @Deprecated
038    @InterfaceAudience.Public
039    @InterfaceStability.Stable
040    public class SequenceFileInputFormat<K, V> extends FileInputFormat<K, V> {
041    
042      public SequenceFileInputFormat() {
043        setMinSplitSize(SequenceFile.SYNC_INTERVAL);
044      }
045      
046      @Override
047      protected FileStatus[] listStatus(JobConf job) throws IOException {
048        FileStatus[] files = super.listStatus(job);
049        for (int i = 0; i < files.length; i++) {
050          FileStatus file = files[i];
051          if (file.isDirectory()) {     // it's a MapFile
052            Path dataFile = new Path(file.getPath(), MapFile.DATA_FILE_NAME);
053            FileSystem fs = file.getPath().getFileSystem(job);
054            // use the data file
055            files[i] = fs.getFileStatus(dataFile);
056          }
057        }
058        return files;
059      }
060    
061      public RecordReader<K, V> getRecordReader(InputSplit split,
062                                          JobConf job, Reporter reporter)
063        throws IOException {
064    
065        reporter.setStatus(split.toString());
066    
067        return new SequenceFileRecordReader<K, V>(job, (FileSplit) split);
068      }
069    
070    }
071