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Showing content from https://hadoop.apache.org/docs/r1.2.1/api/org/apache/hadoop/mapred/FileSplit.html below:

FileSplit (Hadoop 1.2.1 API)

java.lang.Object
  org.apache.hadoop.mapreduce.InputSplit
      org.apache.hadoop.mapred.FileSplit

All Implemented Interfaces:

Writable, InputSplit

public class FileSplit
extends InputSplit
implements InputSplit

A section of an input file. Returned by InputFormat.getSplits(JobConf, int) and passed to InputFormat.getRecordReader(InputSplit,JobConf,Reporter).

@Deprecated
public FileSplit(Path file,
                            long start,
                            long length,
                            JobConf conf)

Deprecated. 

Constructs a split.

Parameters:

file - the file name

start - the position of the first byte in the file to process

length - the number of bytes in the file to process

public FileSplit(Path file,
                 long start,
                 long length,
                 String[] hosts)

Constructs a split with host information

Parameters:

file - the file name

start - the position of the first byte in the file to process

length - the number of bytes in the file to process

hosts - the list of hosts containing the block, possibly null

public Path getPath()

The file containing this split's data.

public long getStart()

The position of the first byte in the file to process.

public long getLength()

The number of bytes in the file to process.

Specified by:

getLength in interface InputSplit

Specified by:

getLength in class InputSplit

Returns:

the number of bytes in the split

public String toString()

Overrides:

toString in class Object

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:

readFields in interface Writable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

IOException

public String[] getLocations()
                      throws IOException

Description copied from class: InputSplit

Get the list of nodes by name where the data for the split would be local. The locations do not need to be serialized.

Specified by:

getLocations in interface InputSplit

Specified by:

getLocations in class InputSplit

Returns:

a new array of the node nodes.

Throws:

IOException

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