org.apache.hadoop.mapred
Class SequenceFileInputFormat<K,V>

java.lang.Object
  org.apache.hadoop.mapred.FileInputFormat<K,V>
      org.apache.hadoop.mapred.SequenceFileInputFormat<K,V>

All Implemented Interfaces:

InputFormat<K,V>

Direct Known Subclasses:

SequenceFileAsBinaryInputFormat, SequenceFileAsTextInputFormat, SequenceFileInputFilter

public class SequenceFileInputFormat<K,V>
extends FileInputFormat<K,V>

An InputFormat for SequenceFiles.

Field Summary

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

LOG

Constructor Summary

SequenceFileInputFormat()

Method Summary

RecordReader<K,V>	getRecordReader(InputSplit split, JobConf job, Reporter reporter) Get the RecordReader for the given InputSplit.
protected Path[]	listPaths(JobConf job) List input directories.

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

addInputPath, addInputPaths, computeSplitSize, getBlockIndex, getInputPathFilter, getInputPaths, getSplits, isSplitable, 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

SequenceFileInputFormat

public SequenceFileInputFormat()

Method Detail

listPaths

protected Path[] listPaths(JobConf job)
                    throws IOException

Description copied from class: FileInputFormat

List input directories. Subclasses may override to, e.g., select only files matching a regular expression.

Overrides:

listPaths in class FileInputFormat<K,V>

Parameters:

job - the job to list input paths for

Returns:

array of Path objects

Throws:

IOException - if zero items.

getRecordReader

public RecordReader<K,V> 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<K,V>

Specified by:

getRecordReader in class FileInputFormat<K,V>

Parameters:

split - the InputSplit

job - the job that this split belongs to

Returns:

a RecordReader

Throws:

IOException