org.apache.hadoop.mapred
Class SequenceFileInputFormat

java.lang.Object
  org.apache.hadoop.mapred.InputFormatBase
      org.apache.hadoop.mapred.SequenceFileInputFormat

All Implemented Interfaces:

InputFormat

public class SequenceFileInputFormat
extends InputFormatBase

An InputFormat for SequenceFiles.

Field Summary

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

LOG

Constructor Summary

SequenceFileInputFormat()

Method Summary

RecordReader	getRecordReader(FileSystem fs, FileSplit split, JobConf job, Reporter reporter) Construct a RecordReader for a FileSplit.
protected File[]	listFiles(FileSystem fs, JobConf job) List input directories.

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

getSplits, 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

listFiles

protected File[] listFiles(FileSystem fs,
                           JobConf job)
                    throws IOException

Description copied from class: InputFormatBase

List input directories. Subclasses may override to, e.g., select only files matching a regular expression. Property mapred.input.subdir, if set, names a subdirectory that is appended to all input dirs specified by job, and if the given fs lists those too, each is added to the returned array of File.

Overrides:

listFiles in class InputFormatBase

Returns:

array of File objects, never zero length.

Throws:

IOException - if zero items.

getRecordReader

public RecordReader getRecordReader(FileSystem fs,
                                    FileSplit split,
                                    JobConf job,
                                    Reporter reporter)
                             throws IOException

Description copied from interface: InputFormat

Construct a RecordReader for a FileSplit.

Specified by:

getRecordReader in interface InputFormat

Specified by:

getRecordReader in class InputFormatBase

Parameters:

fs - the FileSystem

split - the FileSplit

job - the job that this split belongs to

Returns:

a RecordReader

Throws:

IOException