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

Constructors

Constructor and Description
SequenceFileInputFormat()

Method Summary

Methods

Modifier and Type	Method and Description
RecordReader<K,V>	getRecordReader(InputSplit split, JobConf job, Reporter reporter) Get the RecordReader for the given InputSplit.
protected org.apache.hadoop.fs.FileStatus[]	listStatus(JobConf job) List input directories.

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

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

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

listStatus

protected org.apache.hadoop.fs.FileStatus[] listStatus(JobConf job)
                                                throws java.io.IOException

Description copied from class: FileInputFormat

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

Overrides:

listStatus in class FileInputFormat<K,V>

Parameters:

job - the job to list input paths for

Returns:

array of FileStatus objects

Throws:

java.io.IOException - if zero items.

getRecordReader

public RecordReader<K,V> getRecordReader(InputSplit split,
                                JobConf job,
                                Reporter reporter)
                                  throws java.io.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:

java.io.IOException