org.apache.hadoop.streaming
Class StreamInputFormat

java.lang.Object
  org.apache.hadoop.mapred.FileInputFormat<Text,Text>
      org.apache.hadoop.mapred.KeyValueTextInputFormat
          org.apache.hadoop.streaming.StreamInputFormat

All Implemented Interfaces:

InputFormat<Text,Text>, JobConfigurable

public class StreamInputFormat
extends KeyValueTextInputFormat

An input format that selects a RecordReader based on a JobConf property. This should be used only for non-standard record reader such as StreamXmlRecordReader. For all other standard record readers, the appropriate input format classes should be used.

Field Summary

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

LOG

Constructor Summary

StreamInputFormat()

Method Summary

RecordReader<Text,Text>

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

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

configure, isSplitable

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

addInputPath, addInputPaths, computeSplitSize, getBlockIndex, getInputPathFilter, getInputPaths, getSplits, listPaths, listStatus, setInputPathFilter, setInputPaths, setInputPaths, setMinSplitSize, validateInput

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamInputFormat

public StreamInputFormat()

Method Detail

getRecordReader

public RecordReader<Text,Text> getRecordReader(InputSplit genericSplit,
                                               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<Text,Text>

Overrides:

getRecordReader in class KeyValueTextInputFormat

Parameters:

genericSplit - the InputSplit

job - the job that this split belongs to

Returns:

a RecordReader

Throws:

IOException