com.mucommander.file.impl.zip.provider
Class DeflatedOutputStream

java.lang.Object
  java.io.OutputStream
      com.mucommander.file.impl.zip.provider.ZipEntryOutputStream
          com.mucommander.file.impl.zip.provider.DeflatedOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable

public class DeflatedOutputStream
extends ZipEntryOutputStream

DeflatedOutputStream compresses data using the DEFLATED compression method.

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This class is based off the org.apache.tools.zip package of the Apache Ant project. The Ant code has been modified under the terms of the Apache License which you can find in the bundled muCommander license file. It was forked at version 1.7.0 of Ant.

Author:

Maxence Bernard

Field Summary

protected byte[]	buf Buffer used to deflate data
protected java.util.zip.Deflater	deflater Deflater instance that does the actual compression work

Fields inherited from class com.mucommander.file.impl.zip.provider.ZipEntryOutputStream

crc, method, out

Constructor Summary

DeflatedOutputStream(java.io.OutputStream out, java.util.zip.Deflater deflater, byte[] buf)
Creates a new DeflatedOutputStream that writes compressed data to the given OutputStream and automatically updates the supplied CRC32 checksum.

Method Summary

void	close() Completes writing the entry without closing the underlying OutputStream.
protected void	deflate() Writes next block of compressed data to the output stream.
void	finishDeflate() Finishes writing the DEFLATED-compressed data.
int	getTotalIn() Returns the uncompressed size of the data written so far.
int	getTotalOut() Returns the compressed size of the data written so far.
void	write(byte[] b, int offset, int length) Writes the given bytes to the Zip entry.

Methods inherited from class com.mucommander.file.impl.zip.provider.ZipEntryOutputStream

flush, getCrc, getMethod, write

Methods inherited from class java.io.OutputStream

write

Methods inherited from class java.lang.Object

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

Field Detail

deflater

protected java.util.zip.Deflater deflater

Deflater instance that does the actual compression work

buf

protected byte[] buf

Buffer used to deflate data

Constructor Detail

DeflatedOutputStream

public DeflatedOutputStream(java.io.OutputStream out,
                            java.util.zip.Deflater deflater,
                            byte[] buf)

Creates a new DeflatedOutputStream that writes compressed data to the given OutputStream and automatically updates the supplied CRC32 checksum.

Parameters:

out - the OutputStream where the compressed data is sent to

deflater - the Deflater that compresses data, reset before first use

buf - the buffer used to deflate data

Method Detail

deflate

protected void deflate()
                throws java.io.IOException

Writes next block of compressed data to the output stream.

Throws:

java.io.IOException - on error

finishDeflate

public void finishDeflate()
                   throws java.io.IOException

Finishes writing the DEFLATED-compressed data.

Throws:

java.io.IOException - if an I/O occurred

getTotalIn

public int getTotalIn()

Description copied from class: ZipEntryOutputStream

Returns the uncompressed size of the data written so far.

Specified by:

getTotalIn in class ZipEntryOutputStream

Returns:

the uncompressed size of the data written so far

getTotalOut

public int getTotalOut()

Description copied from class: ZipEntryOutputStream

Returns the compressed size of the data written so far.

Specified by:

getTotalOut in class ZipEntryOutputStream

Returns:

the compressed size of the data written so far

write

public void write(byte[] b,
                  int offset,
                  int length)
           throws java.io.IOException

Writes the given bytes to the Zip entry.

Overrides:

write in class java.io.OutputStream

Parameters:

b - the byte array to write

offset - the start position to write from

length - the number of bytes to write

Throws:

java.io.IOException - on error

close

public void close()
           throws java.io.IOException

Completes writing the entry without closing the underlying OutputStream.

Specified by:

close in interface java.io.Closeable

Overrides:

close in class java.io.OutputStream

Throws:

java.io.IOException