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

@InterfaceAudience.Public
 @InterfaceStability.Stable
public class SequenceFileInputFormat<K,V>
extends FileInputFormat<K,V>

An InputFormat for SequenceFiles.

Field Summary

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

INPUT_DIR_NONRECURSIVE_IGNORE_SUBDIRS, INPUT_DIR_RECURSIVE, LOG, NUM_INPUT_FILES

Constructor Summary

Constructors

Constructor and Description
SequenceFileInputFormat()

Method Summary

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

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

addInputPath, addInputPathRecursively, addInputPaths, computeSplitSize, getBlockIndex, getInputPathFilter, getInputPaths, getSplitHosts, getSplits, isSplitable, makeSplit, makeSplit, 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 FileStatus[] listStatus(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. If security is enabled, this method collects delegation tokens from the input paths and adds them to the job's credentials.

Overrides:

listStatus in class FileInputFormat<K,V>

Parameters:

job - the job to list input paths for and attach tokens to.

Returns:

array of FileStatus 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