Package org.apache.hadoop.io.file.tfile

Class BoundedRangeFileInputStream

java.lang.Object

java.io.InputStream

org.apache.hadoop.io.file.tfile.BoundedRangeFileInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class BoundedRangeFileInputStream
extends InputStream

BoundedRangeFIleInputStream abstracts a contiguous region of a Hadoop FSDataInputStream as a regular input stream. One can create multiple BoundedRangeFileInputStream on top of the same FSDataInputStream and they would not interfere with each other.

Constructor Summary

Constructors

Constructor	Description
BoundedRangeFileInputStream(FSDataInputStream in, long offset, long length)	Constructor

Method Summary

Modifier and Type	Method	Description
int	available()
void	close()
void	mark(int readlimit)
boolean	markSupported()
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
void	reset()
long	skip(long n)

Methods inherited from class java.io.InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

BoundedRangeFileInputStream

public BoundedRangeFileInputStream(FSDataInputStream in,
 long offset,
 long length)

Constructor

Parameters:

in - The FSDataInputStream we connect to.

offset - Beginning offset of the region.

length - Length of the region. The actual length of the region may be smaller if (off_begin + length) goes beyond the end of FS input stream.

Method Details

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException

mark

public void mark(int readlimit)

Overrides:

mark in class InputStream

reset

public void reset()
           throws IOException

Overrides:

reset in class InputStream

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class InputStream

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class InputStream