| /** |
| * 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.mapred; |
| |
| import java.io.IOException; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableComparable; |
| |
| /** |
| * This class converts the input keys and values to their String forms by calling toString() |
| * method. This class to SequenceFileAsTextInputFormat class is as LineRecordReader |
| * class to TextInputFormat class. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class SequenceFileAsTextRecordReader |
| implements RecordReader<Text, Text> { |
| |
| private final SequenceFileRecordReader<WritableComparable, Writable> |
| sequenceFileRecordReader; |
| |
| private WritableComparable innerKey; |
| private Writable innerValue; |
| |
| public SequenceFileAsTextRecordReader(Configuration conf, FileSplit split) |
| throws IOException { |
| sequenceFileRecordReader = |
| new SequenceFileRecordReader<WritableComparable, Writable>(conf, split); |
| innerKey = sequenceFileRecordReader.createKey(); |
| innerValue = sequenceFileRecordReader.createValue(); |
| } |
| |
| public Text createKey() { |
| return new Text(); |
| } |
| |
| public Text createValue() { |
| return new Text(); |
| } |
| |
| /** Read key/value pair in a line. */ |
| public synchronized boolean next(Text key, Text value) throws IOException { |
| Text tKey = key; |
| Text tValue = value; |
| if (!sequenceFileRecordReader.next(innerKey, innerValue)) { |
| return false; |
| } |
| tKey.set(innerKey.toString()); |
| tValue.set(innerValue.toString()); |
| return true; |
| } |
| |
| public float getProgress() throws IOException { |
| return sequenceFileRecordReader.getProgress(); |
| } |
| |
| public synchronized long getPos() throws IOException { |
| return sequenceFileRecordReader.getPos(); |
| } |
| |
| public synchronized void close() throws IOException { |
| sequenceFileRecordReader.close(); |
| } |
| |
| } |