org.kepler.hadoop.io.input

Class FileContentRecordReader

java.lang.Object

org.apache.hadoop.mapreduce.RecordReader<java.lang.String,org.apache.hadoop.io.Text>

org.kepler.hadoop.io.input.FileContentRecordReader

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class FileContentRecordReader
extends org.apache.hadoop.mapreduce.RecordReader<java.lang.String,org.apache.hadoop.io.Text>

This class provides InputFormat to read files. Key is file name (no path info), value is file content.

Author:

Jianwu Wang (jianwu@sdsc.edu)

Constructor Summary

Constructors

Constructor and Description
FileContentRecordReader()

Method Summary

Modifier and Type	Method and Description
void	close()
java.lang.String	getCurrentKey()
org.apache.hadoop.io.Text	getCurrentValue()
float	getProgress()
void	initialize(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)
boolean	nextKeyValue()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FileContentRecordReader

public FileContentRecordReader()

Method Detail

initialize

public void initialize(org.apache.hadoop.mapreduce.InputSplit split,
                       org.apache.hadoop.mapreduce.TaskAttemptContext context)
                throws java.io.IOException,
                       java.lang.InterruptedException

Specified by:

initialize in class org.apache.hadoop.mapreduce.RecordReader<java.lang.String,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

java.lang.InterruptedException

getProgress

public float getProgress()
                  throws java.io.IOException

Specified by:

getProgress in class org.apache.hadoop.mapreduce.RecordReader<java.lang.String,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

getCurrentKey

public java.lang.String getCurrentKey()
                               throws java.io.IOException,
                                      java.lang.InterruptedException

Specified by:

getCurrentKey in class org.apache.hadoop.mapreduce.RecordReader<java.lang.String,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

java.lang.InterruptedException

getCurrentValue

public org.apache.hadoop.io.Text getCurrentValue()
                                          throws java.io.IOException,
                                                 java.lang.InterruptedException

Specified by:

getCurrentValue in class org.apache.hadoop.mapreduce.RecordReader<java.lang.String,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

java.lang.InterruptedException

nextKeyValue

public boolean nextKeyValue()
                     throws java.io.IOException,
                            java.lang.InterruptedException

Specified by:

nextKeyValue in class org.apache.hadoop.mapreduce.RecordReader<java.lang.String,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

java.lang.InterruptedException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in class org.apache.hadoop.mapreduce.RecordReader<java.lang.String,org.apache.hadoop.io.Text>

Throws:

java.io.IOException