org.freehep.util.io

Class CompressableOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

org.freehep.util.io.CompressableOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable, FinishableOutputStream

Direct Known Subclasses:

BitOutputStream

public class CompressableOutputStream
extends FilterOutputStream
implements FinishableOutputStream

Special stream that can be used to write a header in uncompressed format, and the rest of the stream in compressed format. This stream is used by SWF, to compress the tail of the stream.

Author:

Mark Donszelmann

Field Summary

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor and Description
CompressableOutputStream(OutputStream out) Creates a Compressable Output Stream from given stream.

Method Summary

Modifier and Type	Method and Description
void	close()
void	finish() Finishes the current outputstream (compresses, flushes, caluclates CRC) and writes whatever is left in the buffers, but does not close the stream.
void	startCompressing() Start compressing from the next byte onwards.
void	write(byte[] b, int off, int len)
void	write(int b)
protected void	writeByteArray(byte[] bytes, int offset, int length)
protected void	writeSingleByte(int b)

Methods inherited from class java.io.FilterOutputStream

flush, write

Methods inherited from class java.lang.Object

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

Constructor Detail

CompressableOutputStream

public CompressableOutputStream(OutputStream out)

Creates a Compressable Output Stream from given stream. Initially the stream does not compress.

Parameters:

out - stream to write to

Method Detail

write

public final void write(int b)
                 throws IOException

Overrides:

write in class FilterOutputStream

Throws:

IOException

writeSingleByte

protected void writeSingleByte(int b)
                        throws IOException

Throws:

IOException

write

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

Overrides:

write in class FilterOutputStream

Throws:

IOException

writeByteArray

protected void writeByteArray(byte[] bytes,
                              int offset,
                              int length)
                       throws IOException

Throws:

IOException

finish

public void finish()
            throws IOException

Description copied from interface: FinishableOutputStream

Finishes the current outputstream (compresses, flushes, caluclates CRC) and writes whatever is left in the buffers, but does not close the stream.

Specified by:

finish in interface FinishableOutputStream

Throws:

IOException - if write fails

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class FilterOutputStream

Throws:

IOException

startCompressing

public void startCompressing()
                      throws IOException

Start compressing from the next byte onwards. Flushes what is currently in the buffer to the underlying stream and start compression from here.

Throws:

IOException - if write fails