net.sf.zipme
Class GZIPOutputStream

java.lang.Object
  java.io.OutputStream
      net.sf.zipme.DeflaterOutputStream
          net.sf.zipme.GZIPOutputStream

public class GZIPOutputStream

extends DeflaterOutputStream

This filter stream is used to compress a stream into a "GZIP" stream. The "GZIP" format is described in RFC 1952.

Since:

JDK 1.1

Field Summary

protected CRC32

crc CRC-32 value for uncompressed data

Fields inherited from class net.sf.zipme.DeflaterOutputStream

buf, def, out

Constructor Summary

GZIPOutputStream(java.io.OutputStream out)
Creates a GZIPOutputStream with the default buffer size

GZIPOutputStream(java.io.OutputStream out, int size)
Creates a GZIPOutputStream with the specified buffer size

Method Summary

void	close() Writes remaining compressed output data to the output stream and closes it.
void	finish() Finishes the stream by calling finish() on the deflater.
void	write(byte[] buf, int off, int len) Writes a len bytes from an array to the compressed stream.

Methods inherited from class net.sf.zipme.DeflaterOutputStream

deflate, flush, write, write

Methods inherited from class java.lang.Object

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

Field Detail

crc

protected CRC32 crc

CRC-32 value for uncompressed data

Constructor Detail

GZIPOutputStream

public GZIPOutputStream(java.io.OutputStream out)
                 throws java.io.IOException

Creates a GZIPOutputStream with the default buffer size

Parameters:

out - The stream to read data (to be compressed) from

GZIPOutputStream

public GZIPOutputStream(java.io.OutputStream out,
                        int size)
                 throws java.io.IOException

Creates a GZIPOutputStream with the specified buffer size

Parameters:

out - The stream to read compressed data from

size - Size of the buffer to use

Method Detail

write

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

Description copied from class: DeflaterOutputStream

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

Overrides:

write in class DeflaterOutputStream

Parameters:

buf - the byte array.

off - the offset into the byte array where to start.

len - the number of bytes to write.

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Writes remaining compressed output data to the output stream and closes it.

Overrides:

close in class DeflaterOutputStream

Throws:

java.io.IOException

finish

public void finish()
            throws java.io.IOException

Description copied from class: DeflaterOutputStream

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.

Overrides:

finish in class DeflaterOutputStream

Throws:

java.io.IOException