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java.util.zip
Class DeflaterOutputStream  

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          java.util.zip.DeflaterOutputStream

Direct Known Subclasses:

GZIPOutputStream, ZipOutputStream

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public class DeflaterOutputStream

extends java.io.FilterOutputStream

This is a special FilterOutputStream deflating the bytes that are written through it. It uses the Deflater for deflating. A special thing to be noted is that flush() doesn't flush everything in Sun's JDK, but it does so in jazzlib. This is because Sun's Deflater doesn't have a way to flush() everything, without finishing the stream.

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Field Summary
protected  byte[]	buf           This buffer is used temporarily to retrieve the bytes from the deflater and write them to the underlying output stream.
protected  Deflater	def           The deflater which is used to deflate the stream.

 

Fields inherited from class java.io.FilterOutputStream

out

 

Constructor Summary

DeflaterOutputStream(java.io.OutputStream out)           Creates a new DeflaterOutputStream with a default Deflater and default buffer size.

DeflaterOutputStream(java.io.OutputStream out, Deflater defl)           Creates a new DeflaterOutputStream with the given Deflater and default buffer size.

DeflaterOutputStream(java.io.OutputStream out, Deflater defl, int bufsize)           Creates a new DeflaterOutputStream with the given Deflater and buffer size.

 

Method Summary
void	close()           Calls finish() and closes the stream.
protected  void	deflate()           Deflates everything in the def's input buffers.
void	finish()           Finishes the stream by calling finish() on the deflater.
void	flush()           Flushes the stream by calling flush() on the deflater and then on the underlying stream.
void	write(byte[] buf, int off, int len)           Writes a len bytes from an array to the compressed stream.
void	write(int bval)           Writes a single byte to the compressed output stream.

 

Methods inherited from class java.io.FilterOutputStream

write

 

Methods inherited from class java.lang.Object

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

 

Field Detail

buf

protected byte[] buf

This buffer is used temporarily to retrieve the bytes from the deflater and write them to the underlying output stream.

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def

protected Deflater def

The deflater which is used to deflate the stream.

Constructor Detail

DeflaterOutputStream

public DeflaterOutputStream(java.io.OutputStream out)

Creates a new DeflaterOutputStream with a default Deflater and default buffer size.

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DeflaterOutputStream

public DeflaterOutputStream(java.io.OutputStream out,
                            Deflater defl)

Creates a new DeflaterOutputStream with the given Deflater and default buffer size.

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DeflaterOutputStream

public DeflaterOutputStream(java.io.OutputStream out,
                            Deflater defl,
                            int bufsize)

Creates a new DeflaterOutputStream with the given Deflater and buffer size.

Method Detail

deflate

protected void deflate()
                throws java.io.IOException

Deflates everything in the def's input buffers. This will call def.deflate() until all bytes from the input buffers are processed.

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flush

public void flush()
           throws java.io.IOException

Flushes the stream by calling flush() on the deflater and then on the underlying stream. This ensures that all bytes are flushed. This function doesn't work in Sun's JDK, but only in jazzlib.

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finish

public void finish()
            throws java.io.IOException

Finishes the stream by calling finish() on the deflater. This was the only way to ensure that all bytes are flushed in Sun's JDK.

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close

public void close()
           throws java.io.IOException

Calls finish() and closes the stream.

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write

public void write(int bval)
           throws java.io.IOException

Writes a single byte to the compressed output stream.

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write

public void write(byte[] buf,
                  int off,
                  int len)
           throws java.io.IOException

Writes a len bytes from an array to the compressed stream.

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