de.esprit.appsuite.io.archive.javatar

Class TarOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

de.esprit.appsuite.io.archive.javatar.TarOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

Direct Known Subclasses:

TarGzOutputStream

public class TarOutputStream
extends java.io.FilterOutputStream

The TarOutputStream writes a UNIX tar archive as an OutputStream. Methods are provided to put entries, and then write their contents by writing to this stream using write(). Kerry Menzel Contributed the code to support file sizes greater than 2GB (longs versus ints).

Version:

$Revision: 1.1 $

Author:

Timothy Gerard Endres,

See Also:

TarBuffer, TarHeader, TarEntry

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	assemBuf
protected int	assemLen
protected TarBuffer	buffer
protected long	currBytes
protected long	currSize
protected boolean	debug
protected byte[]	oneBuf
protected byte[]	recordBuf

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor and Description
TarOutputStream(java.io.OutputStream os)
TarOutputStream(java.io.OutputStream os, int blockSize)
TarOutputStream(java.io.OutputStream os, int blockSize, int recordSize)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Ends the TAR archive and closes the underlying OutputStream.
void	closeEntry() Close an entry.
void	finish() Ends the TAR archive without closing the underlying OutputStream.
int	getRecordSize() Get the record size being used by this stream's TarBuffer.
void	putNextEntry(TarEntry entry) Put an entry on the output stream.
void	setBufferDebug(boolean isDebug) Sets the debugging flag in this stream's TarBuffer.
void	setDebug(boolean isDebug) Sets the debugging flag.
void	write(byte[] wBuf) Writes bytes to the current tar archive entry.
void	write(byte[] wBuf, int wOffset, int numToWrite) Writes bytes to the current tar archive entry.
void	write(int b) Writes a byte to the current tar archive entry.

Methods inherited from class java.io.FilterOutputStream

flush

Methods inherited from class java.lang.Object

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

Field Detail

debug

protected boolean debug

currSize

protected long currSize

currBytes

protected long currBytes

oneBuf

protected byte[] oneBuf

recordBuf

protected byte[] recordBuf

assemLen

protected int assemLen

assemBuf

protected byte[] assemBuf

buffer

protected TarBuffer buffer

Constructor Detail

TarOutputStream

public TarOutputStream(java.io.OutputStream os)

TarOutputStream

public TarOutputStream(java.io.OutputStream os,
               int blockSize)

TarOutputStream

public TarOutputStream(java.io.OutputStream os,
               int blockSize,
               int recordSize)

Method Detail

setDebug

public void setDebug(boolean isDebug)

Sets the debugging flag.

Parameters:

isDebug - True to turn on debugging.

setBufferDebug

public void setBufferDebug(boolean isDebug)

Sets the debugging flag in this stream's TarBuffer.

Parameters:

isDebug - True to turn on debugging.

finish

public void finish()
            throws java.io.IOException

Ends the TAR archive without closing the underlying OutputStream. The result is that the EOF record of nulls is written.

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Ends the TAR archive and closes the underlying OutputStream. This means that finish() is called followed by calling the TarBuffer's close().

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.FilterOutputStream

Throws:

java.io.IOException

getRecordSize

public int getRecordSize()

Get the record size being used by this stream's TarBuffer.

Returns:

The TarBuffer record size.

putNextEntry

public void putNextEntry(TarEntry entry)
                  throws java.io.IOException

Put an entry on the output stream. This writes the entry's header record and positions the output stream for writing the contents of the entry. Once this method is called, the stream is ready for calls to write() to write the entry's contents. Once the contents are written, closeEntry() MUST be called to ensure that all buffered data is completely written to the output stream.

Parameters:

entry - The TarEntry to be written to the archive.

Throws:

java.io.IOException

closeEntry

public void closeEntry()
                throws java.io.IOException

Close an entry. This method MUST be called for all file entries that contain data. The reason is that we must buffer data written to the stream in order to satisfy the buffer's record based writes. Thus, there may be data fragments still being assembled that must be written to the output stream before this entry is closed and the next entry written.

Throws:

java.io.IOException

write

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

Writes a byte to the current tar archive entry. This method simply calls read( byte[], int, int ).

Overrides:

write in class java.io.FilterOutputStream

Parameters:

b - The byte written.

Throws:

java.io.IOException

write

public void write(byte[] wBuf)
           throws java.io.IOException

Writes bytes to the current tar archive entry. This method simply calls read(byte[], int, int ).

Overrides:

write in class java.io.FilterOutputStream

Parameters:

wBuf - The buffer to write to the archive.

Throws:

java.io.IOException

write

public void write(byte[] wBuf,
         int wOffset,
         int numToWrite)
           throws java.io.IOException

Writes bytes to the current tar archive entry. This method is aware of the current entry and will throw an exception if you attempt to write bytes past the length specified for the current entry. The method is also (painfully) aware of the record buffering required by TarBuffer, and manages buffers that are not a multiple of record size in length, including assembling records from small buffers. This method simply calls read( byte[], int, int ).

Overrides:

write in class java.io.FilterOutputStream

Parameters:

wBuf - The buffer to write to the archive.

wOffset - The offset in the buffer from which to get bytes.

numToWrite - The number of bytes to write.

Throws:

java.io.IOException