org.apache.hadoop.examples
Class MultiFileWordCount.MyInputFormat

java.lang.Object
  org.apache.hadoop.mapred.FileInputFormat<K,V>
      org.apache.hadoop.mapred.MultiFileInputFormat<MultiFileWordCount.WordOffset,Text>
          org.apache.hadoop.examples.MultiFileWordCount.MyInputFormat

All Implemented Interfaces:

InputFormat<MultiFileWordCount.WordOffset,Text>

Enclosing class:

MultiFileWordCount

public static class MultiFileWordCount.MyInputFormat
extends MultiFileInputFormat<MultiFileWordCount.WordOffset,Text>

To use MultiFileInputFormat, one should extend it, to return a (custom) RecordReader. MultiFileInputFormat uses MultiFileSplits.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapred.FileInputFormat

FileInputFormat.Counter

Field Summary

Fields inherited from class org.apache.hadoop.mapred.FileInputFormat

LOG

Constructor Summary

MultiFileWordCount.MyInputFormat()

Method Summary

RecordReader<MultiFileWordCount.WordOffset,Text>

getRecordReader(InputSplit split, JobConf job, Reporter reporter) Get the RecordReader for the given InputSplit.

Methods inherited from class org.apache.hadoop.mapred.MultiFileInputFormat

getSplits

Methods inherited from class org.apache.hadoop.mapred.FileInputFormat

addInputPath, addInputPaths, computeSplitSize, getBlockIndex, getInputPathFilter, getInputPaths, getSplitHosts, isSplitable, listStatus, setInputPathFilter, setInputPaths, setInputPaths, setMinSplitSize

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiFileWordCount.MyInputFormat

public MultiFileWordCount.MyInputFormat()

Method Detail

getRecordReader

public RecordReader<MultiFileWordCount.WordOffset,Text> getRecordReader(InputSplit split,
                                                                        JobConf job,
                                                                        Reporter reporter)
                                                                 throws IOException

Description copied from interface: InputFormat

Get the RecordReader for the given InputSplit.

It is the responsibility of the RecordReader to respect record boundaries while processing the logical split to present a record-oriented view to the individual task.

Specified by:

getRecordReader in interface InputFormat<MultiFileWordCount.WordOffset,Text>

Specified by:

getRecordReader in class MultiFileInputFormat<MultiFileWordCount.WordOffset,Text>

Parameters:

split - the InputSplit

job - the job that this split belongs to

Returns:

a RecordReader

Throws:

IOException