org.apache.hadoop.io.compress
Class CompressionOutputStream

java.lang.Object
  java.io.OutputStream
      org.apache.hadoop.io.compress.CompressionOutputStream

All Implemented Interfaces:

Closeable, Flushable

Direct Known Subclasses:

CompressorStream

@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class CompressionOutputStream
extends OutputStream

A compression output stream.

Field Summary

protected OutputStream

out The output stream to be compressed.

Constructor Summary

protected

CompressionOutputStream(OutputStream out) Create a compression output stream that writes the compressed bytes to the given stream.

Method Summary

void	close()
abstract void	finish() Finishes writing compressed data to the output stream without closing the underlying stream.
void	flush()
abstract void	resetState() Reset the compression to the initial state.
abstract void	write(byte[] b, int off, int len) Write compressed bytes to the stream.

Methods inherited from class java.io.OutputStream

write, write

Methods inherited from class java.lang.Object

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

Field Detail

out

protected final OutputStream out

The output stream to be compressed.

Constructor Detail

CompressionOutputStream

protected CompressionOutputStream(OutputStream out)

Create a compression output stream that writes the compressed bytes to the given stream.

Parameters:

out -

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Overrides:

close in class OutputStream

Throws:

IOException

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream

Throws:

IOException

write

public abstract void write(byte[] b,
                           int off,
                           int len)
                    throws IOException

Write compressed bytes to the stream. Made abstract to prevent leakage to underlying stream.

Overrides:

write in class OutputStream

Throws:

IOException

finish

public abstract void finish()
                     throws IOException

Finishes writing compressed data to the output stream without closing the underlying stream.

Throws:

IOException

resetState

public abstract void resetState()
                         throws IOException

Reset the compression to the initial state. Does not reset the underlying stream.

Throws:

IOException