Package org.apache.hadoop.io.compress

Class DecompressorStream

java.lang.Object

java.io.InputStream

org.apache.hadoop.io.compress.CompressionInputStream

org.apache.hadoop.io.compress.DecompressorStream

All Implemented Interfaces:

Closeable, AutoCloseable, Seekable, org.apache.hadoop.fs.statistics.IOStatisticsSource

Direct Known Subclasses:

BlockDecompressorStream

@Public
@Evolving
public class DecompressorStream
extends CompressionInputStream

Field Summary

Fields

Modifier and Type	Field	Description
protected byte[]	buffer
protected boolean	closed
protected Decompressor	decompressor
protected boolean	eof

Fields inherited from class org.apache.hadoop.io.compress.CompressionInputStream

in, maxAvailableData

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DecompressorStream(InputStream in)	Allow derived classes to directly set the underlying stream.
	DecompressorStream(InputStream in, Decompressor decompressor)
	DecompressorStream(InputStream in, Decompressor decompressor, int bufferSize)

Method Summary

Modifier and Type	Method	Description
int	available()
protected void	checkStream()
void	close()
protected int	decompress(byte[] b, int off, int len)
protected int	getCompressedData()
void	mark(int readlimit)
boolean	markSupported()
int	read()
int	read(byte[] b, int off, int len)	Read bytes from the stream.
void	reset()
void	resetState()	Reset the decompressor to its initial state and discard any buffered data, as the underlying stream may have been repositioned.
long	skip(long n)

Methods inherited from class org.apache.hadoop.io.compress.CompressionInputStream

getIOStatistics, getPos, seek, seekToNewSource

Methods inherited from class java.io.InputStream

nullInputStream, read, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class java.lang.Object

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

Field Details

decompressor

protected Decompressor decompressor

buffer

protected byte[] buffer

eof

protected boolean eof

closed

protected boolean closed

Constructor Details

DecompressorStream

public DecompressorStream(InputStream in,
 Decompressor decompressor,
 int bufferSize)
                   throws IOException

Throws:

IOException

DecompressorStream

public DecompressorStream(InputStream in,
 Decompressor decompressor)
                   throws IOException

Throws:

IOException

DecompressorStream

protected DecompressorStream(InputStream in)
                      throws IOException

Allow derived classes to directly set the underlying stream.

Parameters:

in - Underlying input stream.

Throws:

IOException - raised on errors performing I/O.

Method Details

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

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

Description copied from class: CompressionInputStream

Read bytes from the stream. Made abstract to prevent leakage to underlying stream.

Specified by:

read in class CompressionInputStream

Throws:

IOException

decompress

protected int decompress(byte[] b,
 int off,
 int len)
                  throws IOException

Throws:

IOException

getCompressedData

protected int getCompressedData()
                         throws IOException

Throws:

IOException

checkStream

protected void checkStream()
                    throws IOException

Throws:

IOException

resetState

public void resetState()
                throws IOException

Description copied from class: CompressionInputStream

Reset the decompressor to its initial state and discard any buffered data, as the underlying stream may have been repositioned.

Specified by:

resetState in class CompressionInputStream

Throws:

IOException - raised on errors performing I/O.

skip

public long skip(long n)
          throws IOException

Overrides:

skip in class InputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class CompressionInputStream

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class InputStream

mark

public void mark(int readlimit)

Overrides:

mark in class InputStream

reset

public void reset()
           throws IOException

Overrides:

reset in class InputStream

Throws:

IOException