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.FileSystem;
026    import org.apache.hadoop.fs.Path;
027    import org.apache.hadoop.io.Text;
028    import org.apache.hadoop.io.compress.CompressionCodec;
029    import org.apache.hadoop.io.compress.CompressionCodecFactory;
030    import org.apache.hadoop.io.compress.SplittableCompressionCodec;
031    
032    /**
033     * An {@link InputFormat} for plain text files. Files are broken into lines.
034     * Either linefeed or carriage-return are used to signal end of line. Each line
035     * is divided into key and value parts by a separator byte. If no such a byte
036     * exists, the key will be the entire line and value will be empty.
037     * 
038     * @deprecated Use 
039     * {@link org.apache.hadoop.mapreduce.lib.input.KeyValueTextInputFormat} 
040     * instead
041     */
042    @Deprecated
043    @InterfaceAudience.Public
044    @InterfaceStability.Stable
045    public class KeyValueTextInputFormat extends FileInputFormat<Text, Text>
046      implements JobConfigurable {
047    
048      private CompressionCodecFactory compressionCodecs = null;
049      
050      public void configure(JobConf conf) {
051        compressionCodecs = new CompressionCodecFactory(conf);
052      }
053      
054      protected boolean isSplitable(FileSystem fs, Path file) {
055        final CompressionCodec codec = compressionCodecs.getCodec(file);
056        if (null == codec) {
057          return true;
058        }
059        return codec instanceof SplittableCompressionCodec;
060      }
061      
062      public RecordReader<Text, Text> getRecordReader(InputSplit genericSplit,
063                                                      JobConf job,
064                                                      Reporter reporter)
065        throws IOException {
066        
067        reporter.setStatus(genericSplit.toString());
068        return new KeyValueLineRecordReader(job, (FileSplit) genericSplit);
069      }
070    
071    }